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Kim A, Geller D, Min H, Miyazaki B, Raymond J, Vidmar AP, Zipursky R, Chao LC. Decline in case rates of youth onset type 2 diabetes in year three of the COVID-19 pandemic. J Pediatr Endocrinol Metab 2024; 37:360-362. [PMID: 38410000 DOI: 10.1515/jpem-2023-0498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 02/05/2024] [Indexed: 02/28/2024]
Abstract
OBJECTIVES To determine changes in case rates of youth onset type 2 diabetes in the three years following the COVID-19 pandemic. METHODS A single-center, retrospective medical record review was conducted for patients newly diagnosed with T2D between 3/1/18 and 2/28/23 at a pediatric tertiary care center. The number of patients referred to CHLA with a T2D diagnosis date between 3/1/2020 and 2/28/2023 was compared to historical rates between 3/1/2018 and 2/29/2020. χ2 or Fisher's exact test was used to compare categorical variables between each year and 2019. RESULTS Compared to prepandemic baseline (3/1/19-2/29/20, 11.8±3.7 cases/month), there was a significant increase in new T2D monthly case rates in pandemic year 1 (3/1/20-2/28/21, 20.1±6.0 cases/month, 171 %, p=0.005) and pandemic year 2 (3/1/21-2/28/22, 25.9±8.9 cases/month, 221 %, p=0.002). Case rates declined in pandemic year 3 to 14.5±4.1 cases/month (3/1/22-2/28/23, p=0.43). Compared to prepandemic year 1, the frequency of DKA at diagnosis was higher in pandemic year 1 (13.3 vs. 5.0 %, p=0.009). The DKA rate in pandemic years 2 (6.8 %) and 3 (3.4 %) were comparable to prepandemic year 1 (p=0.53 and 0.58, respectively). CONCLUSIONS Youth onset type 2 diabetes cases and DKA rates in year 3 of the pandemic have returned to prepandemic level.
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Affiliation(s)
- Ahlee Kim
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
- 5150 Keck School of Medicine of University of Southern California , Los Angeles, CA, USA
| | - David Geller
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
- 5150 Keck School of Medicine of University of Southern California , Los Angeles, CA, USA
| | - Hyojin Min
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
| | - Brian Miyazaki
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
- 5150 Keck School of Medicine of University of Southern California , Los Angeles, CA, USA
| | - Jennifer Raymond
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
- 5150 Keck School of Medicine of University of Southern California , Los Angeles, CA, USA
| | - Alaina P Vidmar
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
- 5150 Keck School of Medicine of University of Southern California , Los Angeles, CA, USA
| | - Rachel Zipursky
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
| | - Lily C Chao
- Division of Endocrinology, Department of Pediatrics, 5150 Children's Hospital Los Angeles , Los Angeles, CA, USA
- 5150 Keck School of Medicine of University of Southern California , Los Angeles, CA, USA
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Boisseau W, Benomar A, Ducroux C, Fahed R, Smajda S, Diestro JDB, Charbonnier G, Ognard J, Burel J, Ter Schiphorst A, Boulanger M, Nehme A, Boucherit J, Marnat G, Volders D, Holay Q, Forestier G, Bretzner M, Roy D, Vingadassalom S, Elhorany M, Nico L, Jacquin G, Abdalkader M, Guedon A, Seners P, Janot K, Dumas V, Olatunji R, Gazzola S, Milot G, Zehr J, Darsaut TE, Iancu D, Raymond J. The Management of Persistent Distal Occlusions after Mechanical Thrombectomy and Thrombolysis: An Inter- and Intrarater Agreement Study. AJNR Am J Neuroradiol 2024:ajnr.A8149. [PMID: 38388684 DOI: 10.3174/ajnr.a8149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 10/24/2023] [Indexed: 02/24/2024]
Abstract
BACKGROUND AND PURPOSE The best management of patients with persistent distal occlusion after mechanical thrombectomy with or without IV thrombolysis remains unknown. We sought to evaluate the variability and agreement in decision-making for persistent distal occlusions. MATERIALS AND METHODS A portfolio of 60 cases was sent to clinicians with varying backgrounds and experience. Responders were asked whether they considered conservative management or rescue therapy (stent retriever, aspiration, or intra-arterial thrombolytics) a treatment option as well as their willingness to enroll patients in a randomized trial. Agreement was assessed using κ statistics. RESULTS The electronic survey was answered by 31 physicians (8 vascular neurologists and 23 interventional neuroradiologists). Decisions for rescue therapies were more frequent (n = 1116/1860, 60%) than for conservative management (n = 744/1860, 40%; P < .001). Interrater agreement regarding the final management decision was "slight" (κ = 0.12; 95% CI, 0.09-0.14) and did not improve when subgroups of clinicians were studied according to background, experience, and specialty or when cases were grouped according to the level of occlusion. On delayed re-questioning, 23 of 29 respondents (79.3%) disagreed with themselves on at least 20% of cases. Respondents were willing to offer trial participation in 1295 of 1860 (69.6%) cases. CONCLUSIONS Individuals did not agree regarding the best management of patients with persistent distal occlusion after mechanical thrombectomy and IV thrombolysis. There is sufficient uncertainty to justify a dedicated randomized trial.
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Affiliation(s)
- W Boisseau
- From the Department of Interventional Neuroradiology (W.B., S.S.), Fondation Rothschild Hospital, Paris, France
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
| | - A Benomar
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
| | - C Ducroux
- Department of Neurology (C.D., R.F.), Ottawa Hospital Research Institute & University of Ottawa, Ottawa, Canada
| | - R Fahed
- Department of Neurology (C.D., R.F.), Ottawa Hospital Research Institute & University of Ottawa, Ottawa, Canada
| | - S Smajda
- From the Department of Interventional Neuroradiology (W.B., S.S.), Fondation Rothschild Hospital, Paris, France
| | - J D B Diestro
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., R.O.), Department of Medical Imaging, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - G Charbonnier
- Interventional Neuroradiology Department (G.C.), Besançon University Hospital, Besançon, France
| | - J Ognard
- Interventional Neuroradiology Department (J.O.), Hôpital de la Cavale Blanche, Brest, Bretagne, France
| | - J Burel
- Department of Radiology (J. Burel), Rouen University Hospital, Rouen, France
| | - A Ter Schiphorst
- Neurology Department (A.T.S.), CHRU Gui de Chauliac, Montpellier, France
| | - M Boulanger
- Department of Neurology (M. Boulanger, A.N.), Caen University Hospital, Caen, France
| | - A Nehme
- Department of Neurology (M. Boulanger, A.N.), Caen University Hospital, Caen, France
| | - J Boucherit
- Department of Radiology (J. Boucherit), Rennes University Hospital, Rennes, France
| | - G Marnat
- Department of Neuroradiology (G. Marnat), University Hospital of Bordeaux, Bordeaux, France
| | - D Volders
- From the Department of Interventional Neuroradiology (W.B., S.S.), Fondation Rothschild Hospital, Paris, France
| | - Q Holay
- Radiology Department (Q.H.), Hôpital d'Instruction des armées Saint-Anne, Toulon, France
| | - G Forestier
- Neuroradiology Department (G.F.), University Hospital of Limoges, Limoges, France
| | - M Bretzner
- Neuroradiology Department (M. Bretzner), CHU Lille, University Lille, Inserm, U1172 Lille Neuroscience & Cognition, F-59000, Lille, France
| | - D Roy
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
| | - S Vingadassalom
- Interventional Neuroradiology Department (S.V.), CHRU Marseille, La Timone, France
| | - M Elhorany
- Department of Neuroradiology (M.E.), Groupe Hospitalier de Pitié Salpêtrière, Paris, France
- Department of Neurology (M.E.), Tanta University, Tanta, Egypt
| | - L Nico
- Department of Radiology (L.N.), University Hospital of Padova, Padova, Italy
| | - G Jacquin
- Neurovascular Health Program (G.J.), Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - M Abdalkader
- Department of Radiology (M.A.), Boston Medical Center, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts
| | - A Guedon
- Department of Neuroradiology (A.G.), Lariboisière Hospital, Paris, France
| | - P Seners
- Neurology Department (P.S.), Hôpital Fondation A. de Rothschild, Fondation Rothschild Hospital, Paris, France
- Institut de Psychiatrie et Neurosciences de Paris (P.S.), UMR_S1266, INSERM, Université de Paris, Paris, France
| | - K Janot
- Interventional Neuroradiology (K.J.), University Hospital of Tours, Tours, France
| | - V Dumas
- Radiology Department (V.D.), University Hospital of Poitiers, Poitiers, France
| | - R Olatunji
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., R.O.), Department of Medical Imaging, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - S Gazzola
- From the Department of Interventional Neuroradiology (W.B., S.S.), Fondation Rothschild Hospital, Paris, France
- From the Department of Interventional Neuroradiology (W.B., S.S.), Fondation Rothschild Hospital, Paris, France
| | - G Milot
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
| | - J Zehr
- Department of Neurology (C.D., R.F.), Ottawa Hospital Research Institute & University of Ottawa, Ottawa, Canada
- Department of Neurology (C.D., R.F.), Ottawa Hospital Research Institute & University of Ottawa, Ottawa, Canada
| | - T E Darsaut
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., R.O.), Department of Medical Imaging, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D., R.O.), Department of Medical Imaging, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - D Iancu
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
| | - J Raymond
- Department of Radiology (W.B., A.B., D.R, D.I., J.R.), Centre Hospitalier de l'Université de Montréal Montréal, Canada
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Dupouy DLM, Bolton MS, Berry TP, Raymond J, Meakin GE. Saw marks in bone: A preliminary empirical study to inform decision making and best practice. Forensic Sci Int 2023; 353:111857. [PMID: 37871432 DOI: 10.1016/j.forsciint.2023.111857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 09/10/2023] [Accepted: 10/09/2023] [Indexed: 10/25/2023]
Abstract
Forensic toolmark examiners compare marks between those observed on an item/surface and those made by a reference implement, such as a particular tool or weapon, to provide an opinion of the likelihood of common origin. It is widely accepted that such comparison opinions need to be underpinned by empirical research, and this study aimed to add to the knowledge base relied upon when developing and comparing saw marks in bone, a substrate encountered in body dismemberment cases. Porcine bones were used as a human proxy; they were either fresh with residual soft tissue and bodily fluids present ('wet') to replicate dismembered bones shortly post-mortem, or processed to remove soft tissue and moisture content ('dry') to represent cases of dismemberment after an extended period of decomposition and exposure. The bones were cut using one implement of each of five classes: hand saw, mitre saw, reciprocating saw, oscillating saw, and serrated knife. They were cut, either completely through (except for serrated knife), giving two surfaces per cut to examine, or to a depth up to 3 mm (false starts). Five replicates per combination of bone condition, saw, and cut type gave 130 bone samples. These were then cleaned and cast using Isomark Silicone Polymer Compound or Mikrosil, giving 260 cast samples. All bone and cast samples were photographed, examined for various class characteristic markers, and specific markers measured. No significant differences between Isomark and Mikrosil casts were observed when compared side-by-side, demonstrating suitability of both materials for casting of saw marks on bone. Although saw marks presented more class characteristic markers on dry than wet bones, calculations of tooth distances and measurements of kerf width (KW) from marks did not significantly differ between bone conditions, with exception of the reciprocating saw that produced false start marks with significantly larger minimum KW on wet than dry samples. Further analysis supported that tooth distances on marks made by hand and oscillating saws are sufficiently accurate for the determination of saw teeth per inch (TPI). However, one tooth distance on marks made by reciprocating saws did not accurately represent TPI. Finally, examination of presence or absence of class characteristic markers on each saw mark demonstrated consistent variation between saw classes. These results enabled the development of exclusion-based decision trees, and a reference database (available on request), for use by toolmark examiners in their evaluation of saw types based on class characteristic markers observed in cut bone.
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Affiliation(s)
- Daniel L M Dupouy
- Centre for Forensic Science, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Matthew S Bolton
- Australian Federal Police, Forensics, Operational Science & Technology, Sydney, NSW 2000, Australia
| | - Timothy P Berry
- NSW Police Force, Ballistics Investigation Section, Identification Services Branch, Forensic Evidence & Technical Services Command, Surry Hills, NSW 2010, Australia
| | - Jennifer Raymond
- NSW Police Force, Science & Research Unit, Forensic Evidence & Technical Services Command, Surry Hills, NSW 2010, Australia
| | - Georgina E Meakin
- Centre for Forensic Science, University of Technology Sydney, Ultimo, NSW 2007, Australia; Centre for the Forensic Sciences, Department of Security and Crime Science, University College London, 35 Tavistock Square, London WC1H 9EZ, UK.
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Darsaut TE, Raymond J. Clinical decisions based on reasons that reason should ignore. Neurochirurgie 2023; 69:101496. [PMID: 37742488 DOI: 10.1016/j.neuchi.2023.101496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 09/19/2023] [Indexed: 09/26/2023]
Affiliation(s)
- T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, 8440 112 St NW, Edmonton, Alberta, Canada
| | - J Raymond
- Department of Radiology, Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
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Chan VKY, Darsaut TE, Raymond J. Cross-overs and design issues in lumbar discectomy trials. Neurochirurgie 2023; 69:101462. [PMID: 37419080 DOI: 10.1016/j.neuchi.2023.101462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 06/20/2023] [Indexed: 07/09/2023]
Affiliation(s)
- V K Y Chan
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, 8440 112 Street NW, Edmonton, Alberta, Canada
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, 8440 112 Street NW, Edmonton, Alberta, Canada
| | - J Raymond
- Department of Radiology, Service of Neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
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Chapman R, Summersby S, Lang T, Raymond J, Ballantyne K. Novices cannot fill the examiners' shoes: Evidence of footwear examiners' expertise in shoe comparisons. Sci Justice 2023; 63:598-611. [PMID: 37718007 DOI: 10.1016/j.scijus.2023.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/13/2023] [Accepted: 07/16/2023] [Indexed: 09/19/2023]
Abstract
The value of a footwear examiner's opinion centres on their ability to determine whether a particular shoe made an impression with greater accuracy than a novice. However, there has been limited research on the expertise of footwear examiners and the accuracy and reproducibility of their decisions. In the current study, we measured the accuracy and consensus of 31 footwear examiners versus a comparison group of 29 novices. Participants completed 20 ground truth known mock shoe comparisons. Results demonstrated that footwear examiners were more accurate than novices, regardless of comparison difficulty. Overall, on trials where probative decisions were given, examiners made false identifications and false exclusions on a total of 3% and 2% of trials, while novices made false identifications and false exclusions on a total of 19% and 17% of trials. Examiners also demonstrated better consensus in their opinions than novices, although both groups demonstrated low levels of agreement in their responses and variability in their interpretation of the conclusion scale. In summary, these findings support the proposition that footwear examiners show expert-level performance in matching known and unknown footwear impressions. These performance estimates may help the criminal justice system to appropriately value footwear examination evidence.
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Affiliation(s)
- R Chapman
- Major Crime Scene Unit, Victoria Police Forensic Services Department, 31 Forensic Drive Macleod, VIC 3085, Australia
| | - S Summersby
- Office of the Chief Forensic Scientist, Victoria Police Forensic Services Department, 31 Forensic Drive Macleod, VIC 3085, Australia.
| | - T Lang
- Major Crime Scene Unit, Victoria Police Forensic Services Department, 31 Forensic Drive Macleod, VIC 3085, Australia; Office of the Chief Forensic Scientist, Victoria Police Forensic Services Department, 31 Forensic Drive Macleod, VIC 3085, Australia
| | - J Raymond
- Forensic Evidence and Technical Service Command, New South Wales Police Force, 151-241 Goulburn Street Surry Hills, NSW 2010, Australia
| | - K Ballantyne
- Office of the Chief Forensic Scientist, Victoria Police Forensic Services Department, 31 Forensic Drive Macleod, VIC 3085, Australia
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Chan VKY, Darsaut TE, Bailey CS, Raymond J. Understanding crossovers and potential ways to mitigate the problem: Lessons from influential trials on lumbar microdiscectomy. Neurochirurgie 2023; 69:101461. [PMID: 37450957 DOI: 10.1016/j.neuchi.2023.101461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 06/20/2023] [Indexed: 07/18/2023]
Abstract
BACKGROUND Lumbar microdiscectomy is the most frequent surgical intervention used in the treatment of sciatica from herniated lumbar discs. Many discectomy trials have been plagued with an excessive number of crossovers that have rendered results inconclusive. METHODS We review the design and results of influential lumbar microdiscectomy trials. We also discuss the various strategies that have been used to decrease the number of crossovers or to mitigate the effects of crossovers on analyses. RESULTS Randomized trials on lumbar discectomy were affected by crossover rates of 8% to 42%. Various strategies that have been used to decrease that number or to mitigate the effects on results include: patient selection, blinding (placebo-controlled trials), an immediate access to surgery for the surgical group (but limited access to surgery for the conservative group), shortening the follow-up period necessary to reach the primary outcome measure, postponing crossovers to surgery after determination of the primary outcome, and modifying the primary outcome measure to include treatment failures. Crossovers should be anticipated and compensated for by increasing the number of participants. CONCLUSION Non-adherence to randomly allocated management options can deprive trials of the statistical power needed to inform clinical care. Crossovers and ways to mitigate related problems should be anticipated at the time of trial design.
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Affiliation(s)
- V K Y Chan
- Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Centre, University of Alberta Hospital, 8440 112, Street NW, Edmonton, Alberta, Canada
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Centre, University of Alberta Hospital, 8440 112, Street NW, Edmonton, Alberta, Canada
| | - C S Bailey
- Department of Surgery, London Health Sciences Centre, London, Ontario, Canada
| | - J Raymond
- Department of Radiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
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Raymond J, Darsaut TE. Reply. AJNR Am J Neuroradiol 2023; 44:E36-E37. [PMID: 37500283 PMCID: PMC10411846 DOI: 10.3174/ajnr.a7958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Affiliation(s)
- J Raymond
- Department of RadiologyCentre Hospitalier de l'Université de MontréalMontreal, Québec, Canada
| | - T E Darsaut
- University of Alberta HospitalEdmonton, Alberta, Canada
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Raymond J, Chan VKY, Darsaut TE. Understanding how the research question impacts trial design: Examples from discectomy trials. Neurochirurgie 2023; 69:101460. [PMID: 37413815 DOI: 10.1016/j.neuchi.2023.101460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 06/20/2023] [Indexed: 07/08/2023]
Abstract
BACKGROUND Formulating a pertinent research question is of the utmost importance in clinical research. An ill-conceived question may lead to an erroneous trial design, which may adversely affect the care of patients and provide uninformative or even misleading results. METHODS We review the research question of a randomized trial on the timing of lumbar discectomy. We compare the resulting design with other trials, real or hypothetical, that would have been more appropriate. RESULTS The RCT we examine randomly allocated patients to early or delayed surgery to answer a theoretical question of the effect of time on the efficacy of surgery. The trial was interpreted to have shown that early surgery was associated with better clinical and functional outcomes as compared to delayed surgery. This conclusion is clinically misleading. Valid comparisons between groups should be performed on intent-to-treat analyses and at the same time points after randomization (and not at a fixed follow-up period after surgery). The clinically pertinent comparison is not between the theoretical efficacy of surgery performed at various times, but between surgery and conservative management in patients presenting at various times. Better-designed trials on the clinical benefits of lumbar discectomy, including the treatment of chronic sciatica, have been published. CONCLUSION Theoretical research questions inspired from observational data can lead to erroneous trial design. Prospective randomized trials impact practice immediately: they are unique occasions to address clinical problems and optimize care under uncertainty in real time. However, they require the research question to be formulated with great care.
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Affiliation(s)
- J Raymond
- Division of Neurosurgery, Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada.
| | - V K Y Chan
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Darsaut TE, Raymond J. 'It is not the answer which enlightens, but the question'. Neurochirurgie 2023; 69:101446. [PMID: 37178487 DOI: 10.1016/j.neuchi.2023.101446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 05/15/2023]
Affiliation(s)
- T E Darsaut
- Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Centre, University of Alberta Hospital, 8440 112 St NW, Edmonton, Alberta, Canada
| | - J Raymond
- Department of Radiology, Service of Neuroradiology, centre hospitalier de l'université de Montréal (CHUM), room D03.5462b, Montreal, H2X 0C1 Quebec, Canada.
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Darsaut TE, Findlay JM, Bojanowski MW, Chalaala C, Iancu D, Roy D, Weill A, Boisseau W, Diouf A, Magro E, Kotowski M, Keough MB, Estrade L, Bricout N, Lejeune JP, Chow MMC, O'Kelly CJ, Rempel JL, Ashforth RA, Lesiuk H, Sinclair J, Erdenebold UE, Wong JH, Scholtes F, Martin D, Otto B, Bilocq A, Truffer E, Butcher K, Fox AJ, Arthur AS, Létourneau-Guillon L, Guilbert F, Chagnon M, Zehr J, Farzin B, Gevry G, Raymond J. A Pragmatic Randomized Trial Comparing Surgical Clipping and Endovascular Treatment of Unruptured Intracranial Aneurysms. AJNR Am J Neuroradiol 2023; 44:634-640. [PMID: 37169541 PMCID: PMC10249696 DOI: 10.3174/ajnr.a7865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/10/2023] [Indexed: 05/13/2023]
Abstract
BACKGROUND AND PURPOSE Surgical clipping and endovascular treatment are commonly used in patients with unruptured intracranial aneurysms. We compared the safety and efficacy of the 2 treatments in a randomized trial. MATERIALS AND METHODS Clipping or endovascular treatments were randomly allocated to patients with one or more 3- to 25-mm unruptured intracranial aneurysms judged treatable both ways by participating physicians. The study hypothesized that clipping would decrease the incidence of treatment failure from 13% to 4%, a composite primary outcome defined as failure of aneurysm occlusion, intracranial hemorrhage during follow-up, or residual aneurysms at 1 year, as adjudicated by a core lab. Safety outcomes included new neurologic deficits following treatment, hospitalization of >5 days, and overall morbidity and mortality (mRS > 2) at 1 year. There was no blinding. RESULTS Two hundred ninety-one patients were enrolled from 2010 to 2020 in 7 centers. The 1-year primary outcome, ascertainable in 290/291 (99%) patients, was reached in 13/142 (9%; 95% CI, 5%-15%) patients allocated to surgery and in 28/148 (19%; 95% CI, 13%-26%) patients allocated to endovascular treatments (relative risk: 2.07; 95% CI, 1.12-3.83; P = .021). Morbidity and mortality (mRS >2) at 1 year occurred in 3/143 and 3/148 (2%; 95% CI, 1%-6%) patients allocated to surgery and endovascular treatments, respectively. Neurologic deficits (32/143, 22%; 95% CI, 16%-30% versus 19/148, 12%; 95% CI, 8%-19%; relative risk: 1.74; 95% CI, 1.04-2.92; P = .04) and hospitalizations beyond 5 days (69/143, 48%; 95% CI, 40%-56% versus 12/148, 8%; 95% CI, 5%-14%; relative risk: 0.18; 95% CI, 0.11-0.31; P < .001) were more frequent after surgery. CONCLUSIONS Surgical clipping is more effective than endovascular treatment of unruptured intracranial aneurysms in terms of the frequency of the primary outcome of treatment failure. Results were mainly driven by angiographic results at 1 year.
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Affiliation(s)
- T E Darsaut
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - J M Findlay
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | | | | | - D Iancu
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - D Roy
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - A Weill
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - W Boisseau
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - A Diouf
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - E Magro
- Service of Neurosurgery (E.M.), Centre Hospitalier Universitaire Cavale Blanche, Institut National de la Santé et de la Recherche Médicale Unité Mixte de Recherche 1101 LaTIM, Brest, France
| | - M Kotowski
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - M B Keough
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - L Estrade
- Interventional Neuroradiology (L.E., N.B.)
| | - N Bricout
- Interventional Neuroradiology (L.E., N.B.)
| | - J-P Lejeune
- Service of Neurosurgery (J.-P.L.), Centre Hospitalier Universitaire de Lille, Lille, France
| | - M M C Chow
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - C J O'Kelly
- From the Division of Neurosurgery (T.E.D., J.M.F., M.B.K., M.M.C.C., C.J.O.)
| | - J L Rempel
- Department of Surgery, and Department of Radiology and Diagnostic Imaging (J.L.R., R.A.A.), Mackenzie Health Sciences Centre, University of Alberta Hospital, Edmonton, Alberta, Canada
| | - R A Ashforth
- Department of Surgery, and Department of Radiology and Diagnostic Imaging (J.L.R., R.A.A.), Mackenzie Health Sciences Centre, University of Alberta Hospital, Edmonton, Alberta, Canada
| | - H Lesiuk
- Section of Neurosurgery (H.L., J.S.)
| | | | - U-E Erdenebold
- Department of Surgery, and Department of Medical Imaging (U.-E.E.), Section of Interventional Neuroradiology, Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
| | - J H Wong
- Division of Neurosurgery (J.H.W.), Foothills Medical Centre, University of Calgary, Calgary, Alberta, Canada
| | - F Scholtes
- Departments of Neurosurgery (F.S., D.M.)
| | - D Martin
- Departments of Neurosurgery (F.S., D.M.)
| | - B Otto
- Medical Physics (B.O.), Division of Medical Imaging, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - A Bilocq
- Service of Neurosurgery (A.B., E.T.), Centre Hospitalier Régional de Trois-Rivières, Trois-Rivières, Québec, Canada
| | - E Truffer
- Service of Neurosurgery (A.B., E.T.), Centre Hospitalier Régional de Trois-Rivières, Trois-Rivières, Québec, Canada
| | - K Butcher
- Clinical Neurosciences (K.B.), Prince of Wales Clinical School, University of New South Wales, Randwick, New South Wales, Australia
| | - A J Fox
- Department of Medical Imaging (A.J.F.), University of Toronto, Toronto, Ontario, Canada
| | - A S Arthur
- Department of Neurosurgery (A.S.A.), University of Tennessee Health Science Center and Semmes-Murphey Clinic, Memphis, Tennessee
| | - L Létourneau-Guillon
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - F Guilbert
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - M Chagnon
- Department of Mathematics and Statistics (M.C., J.Z.), Université de Montréal, Montréal, Québec, Canada
| | - J Zehr
- Department of Mathematics and Statistics (M.C., J.Z.), Université de Montréal, Montréal, Québec, Canada
| | - B Farzin
- Research Centre of the University of Montreal Hospital Centre (B.F., G.G., J.R.), Interventional Neuroradiology Research Laboratory, Montreal, Québec, Canada
| | - G Gevry
- Research Centre of the University of Montreal Hospital Centre (B.F., G.G., J.R.), Interventional Neuroradiology Research Laboratory, Montreal, Québec, Canada
| | - J Raymond
- Department of Surgery, and Service of Neuroradiology (D.I., D.R., A.W., W.B., A.D., M.K., L.L.-G., F.G., J.R.), Department of Radiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
- Research Centre of the University of Montreal Hospital Centre (B.F., G.G., J.R.), Interventional Neuroradiology Research Laboratory, Montreal, Québec, Canada
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Boisseau W, Darsaut TE, Fahed R, Drake B, Lesiuk H, Rempel JL, Gentric JC, Ognard J, Nico L, Iancu D, Roy D, Weill A, Chagnon M, Zehr J, Lavoie P, Nguyen TN, Raymond J. Stent-Assisted Coiling in the Treatment of Unruptured Intracranial Aneurysms: A Randomized Clinical Trial. AJNR Am J Neuroradiol 2023; 44:381-389. [PMID: 36927759 PMCID: PMC10084896 DOI: 10.3174/ajnr.a7815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 02/16/2023] [Indexed: 03/18/2023]
Abstract
BACKGROUND AND PURPOSE Stent-assisted coiling may improve angiographic results of endovascular treatment of unruptured intracranial aneurysms compared with coiling alone, but this has never been shown in a randomized trial. MATERIALS AND METHODS The Stenting in the Treatment of Aneurysm Trial was an investigator-led, parallel, randomized (1:1) trial conducted in 4 university hospitals. Patients with intracranial aneurysms at risk of recurrence, defined as large aneurysms (≥10 mm), postcoiling recurrent aneurysms, or small aneurysms with a wide neck (≥4 mm), were randomly allocated to stent-assisted coiling or coiling alone. The composite primary efficacy outcome was "treatment failure," defined as initial failure to treat the aneurysm; aneurysm rupture or retreatment during follow-up; death or dependency (mRS > 2); or an angiographic residual aneurysm adjudicated by an independent core laboratory at 12 months. The primary hypothesis (revised for slow accrual) was that stent-assisted coiling would decrease treatment failures from 33% to 15%, requiring 200 patients. Primary analyses were intent to treat. RESULTS Of 205 patients recruited between 2011 and 2021, ninety-four were allocated to stent-assisted coiling and 111 to coiling alone. The primary outcome, ascertainable in 203 patients, was reached in 28/93 patients allocated to stent-assisted coiling (30.1%; 95% CI, 21.2%-40.6%) compared with 30/110 (27.3%; 95% CI, 19.4%-36.7%) allocated to coiling alone (relative risk = 1.10; 95% CI, 0.7-1.7; P = .66). Poor clinical outcomes (mRS >2) occurred in 8/94 patients allocated to stent-assisted coiling (8.5%; 95% CI, 4.0%-16.6%) compared with 6/111 (5.4%; 95% CI, 2.2%-11.9%) allocated to coiling alone (relative risk = 1.6; 95% CI, 0.6%-4.4%; P = .38). CONCLUSIONS The STAT trial did not show stent-assisted coiling to be superior to coiling alone for wide-neck, large, or recurrent unruptured aneurysms.
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Affiliation(s)
- W Boisseau
- From the Department of Radiology (W.B., D.I., D.R., A.W., J.R.), Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - T E Darsaut
- Department of Surgery (T.E.D.), Division of Neurosurgery
| | - R Fahed
- Departments of Neurology (R.F.)
| | - B Drake
- Neurosurgery (B.D., H.L.), University of Ottawa, the Ottawa Hospital, Ottawa, Ontario, Canada
| | - H Lesiuk
- Neurosurgery (B.D., H.L.), University of Ottawa, the Ottawa Hospital, Ottawa, Ontario, Canada
| | - J L Rempel
- Department of Radiology and Diagnostic Imaging (J.L.R.), University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - J-C Gentric
- Department of Radiology (J.-C.G., J.O.), University Hospital of Brest, Brest, France
| | - J Ognard
- Department of Radiology (J.-C.G., J.O.), University Hospital of Brest, Brest, France
| | - L Nico
- Departement of Radiology (L.N.), Service of Interventional Neuroradiology, Centre Hospitalo-universitaire de Saint-Etienne, Saint-Etienne, France
| | - D Iancu
- From the Department of Radiology (W.B., D.I., D.R., A.W., J.R.), Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - D Roy
- From the Department of Radiology (W.B., D.I., D.R., A.W., J.R.), Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - A Weill
- From the Department of Radiology (W.B., D.I., D.R., A.W., J.R.), Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
| | - M Chagnon
- Department of Mathematics and Statistics (M.C., J.Z.), Pavillon André-Aisenstadt, Montreal, Québec, Canada
| | - J Zehr
- Department of Mathematics and Statistics (M.C., J.Z.), Pavillon André-Aisenstadt, Montreal, Québec, Canada
| | - P Lavoie
- Department of Neurosurgery (P.L.), Centre Hospitalier Universitaire de Québec-Université Laval, Québec, Canada
| | - T N Nguyen
- Departments of Neurology (T.N.N.)
- Radiology (T.N.N.), Boston Medical Center, Boston, Massachusetts
| | - J Raymond
- From the Department of Radiology (W.B., D.I., D.R., A.W., J.R.), Service of Neuroradiology, Centre Hospitalier de l'Université de Montréal, Montreal, Québec, Canada
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Raymond J, Rheaume AR, Olijnyk L, Lecaros NE, Darsaut TE. Understanding the difference between theory and practice: The extracranial-intracranial bypass trials in prevention of ischemic stroke. Neurochirurgie 2023; 69:101407. [PMID: 36689827 DOI: 10.1016/j.neuchi.2023.101407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 01/22/2023]
Abstract
BACKGROUND Patients with atherosclerotic carotid or middle cerebral artery occlusions suffer ischemic events that might theoretically be preventable with a surgical extracranial-intracranial bypass, but theory by itself does not justify surgical interventions. METHODS We review landmark randomized trials on EC-IC bypass surgery for the treatment of ischemic stroke in patients with atherosclerotic stenoses or occlusions. RESULTS The initial EC-IC bypass trial from 1985 did not show any clinical benefit from surgery. The carotid occlusion surgery study (COSS) performed more than 20 years later included only patients highly selected to potentially benefit from bypass by using modern perfusion studies. While EC-IC bypasses were successfully created and they did improve cerebral perfusion, the COSS study also failed to show any clinical benefit to the participating patients. CONCLUSION Neurosurgical interventions must not only work in theory; they must improve patient outcomes in real practice.
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Affiliation(s)
- J Raymond
- Department of radiology, Service of neuroradiology, Centre hospitalier de l'université de Montréal (CHUM), Montréal, Québec, Canada.
| | - A R Rheaume
- Division of neurosurgery, Department of surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - L Olijnyk
- Department of radiology, Service of neuroradiology, Centre hospitalier de l'université de Montréal (CHUM), Montréal, Québec, Canada
| | - N E Lecaros
- Department of radiology, Service of neuroradiology, Centre hospitalier de l'université de Montréal (CHUM), Montréal, Québec, Canada
| | - T E Darsaut
- Division of neurosurgery, Department of surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Collins J, Benomar A, Iancu D, Farzin B, Darsaut TE, Raymond J. Research participants may not recall their participation but have a better understanding of alternative management options than patients in routine care. Neurochirurgie 2023; 69:101392. [PMID: 36669431 DOI: 10.1016/j.neuchi.2022.101392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 09/23/2022] [Indexed: 01/20/2023]
Abstract
BACKGROUND Patient understanding of care interventions, of the clinical uncertainty, and of their participation in clinical research is often poor. We hypothesized that compared to routine care, patients would better understand the prevailing uncertainty when they participated in research. METHODS A questionnaire was administered to patients at the time they attended a follow-up neurovascular clinic 4 to 52 weeks after a care episode where they did or did not participate in a clinical trial. Patients were not reminded whether they had previously participated in a clinical trial. Questions concerned their understanding of the risks/benefits of interventions, the availability of alternative options, whether their personal opinion was taken into consideration, the reason for the final decision, their confidence at having received the best management, and whether they had been research participants. RESULTS Between June 2019 and June 2020, 167 patients were recruited; 71 had truly been research participants, while 96 had not. A greater proportion of research patients were aware of the existence of management alternatives (65% versus 44%; P=0.008). Patients of both groups believed their personal opinion counted in the final decision (76% versus 70%), and patients were equally confident that they had received the best management (94%). Research patients believed they had participated in research 46% of the time, compared to 12% of routine care patients (P=0.003). CONCLUSION Many patients do not recall that they participated in a clinical trial, but they have a better understanding of the clinical uncertainty and of the availability of alternative management options.
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Affiliation(s)
- J Collins
- Interventional Neuroradiology Research laboratory, CHUM Research Centre, Montreal, Quebec, Canada
| | - A Benomar
- Interventional Neuroradiology Research laboratory, CHUM Research Centre, Montreal, Quebec, Canada; Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - D Iancu
- Interventional Neuroradiology Research laboratory, CHUM Research Centre, Montreal, Quebec, Canada; Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - B Farzin
- Interventional Neuroradiology Research laboratory, CHUM Research Centre, Montreal, Quebec, Canada
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - J Raymond
- Interventional Neuroradiology Research laboratory, CHUM Research Centre, Montreal, Quebec, Canada; Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
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Rheaume AR, Olijnyk L, Lecaros NE, Darsaut TE, Raymond J. Understanding how the primary endpoint impacts the interpretation of trial results: The Japanese Adult Moyamoya bypass trial. Neurochirurgie 2023; 69:101408. [PMID: 36701981 DOI: 10.1016/j.neuchi.2023.101408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND The meaning of a clinical trial depends to a large extent on the choice of the primary outcome measure, which can be explanatory or pragmatic. METHODS We review the Japanese Adult Moyamoya (JAM) trial, that compared surgical extracranial to intracranial (EC-IC) bypass and medical management of hemorrhagic moyamoya disease. We also review some principles which guide the selection of the primary trial endpoint. DISCUSSION The main component of the primary outcome measure in JAM was rebleeding, a surrogate outcome that allowed investigators to demonstrate that surgical bypass had causal efficacy. However, the number of patients with a poor outcome, defined as those with a modified Rankin score (mRS)>2, would have been a more pragmatic choice. Unfortunately, the trial was too small to show that patients benefited from surgery. CONCLUSION The JAM trial showed that EC-IC bypass can decrease rebleeding in moyamoya patients, but whether patients have better outcomes with surgery remains uncertain. Hard pragmatic clinical primary outcome measures are necessary to guide surgical care.
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Affiliation(s)
- A R Rheaume
- Division of neurosurgery, department of surgery, university of Alberta Hospital, Mackenzie Health Sciences centre, Edmonton, Alberta, Canada
| | - L Olijnyk
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada
| | - N E Lecaros
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada
| | - T E Darsaut
- Division of neurosurgery, department of surgery, university of Alberta Hospital, Mackenzie Health Sciences centre, Edmonton, Alberta, Canada
| | - J Raymond
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
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Raymond J, Olijnyk L, Lecaros NE, Rheaume AR, Darsaut TE. When successful surgery may not be beneficial to patients. Neurochirurgie 2023; 69:101406. [PMID: 36706512 DOI: 10.1016/j.neuchi.2023.101406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/02/2022] [Indexed: 01/26/2023]
Affiliation(s)
- J Raymond
- Centre hospitalier de l'université de Montreal, Montreal, Canada.
| | - L Olijnyk
- Centre hospitalier de l'université de Montreal, Montreal, Canada
| | - N E Lecaros
- Centre hospitalier de l'université de Montreal, Montreal, Canada
| | - A R Rheaume
- Division of neurosurgery, department of surgery, university of Alberta hospital, Mackenzie health sciences centre, Edmonton, Alberta, Canada
| | - T E Darsaut
- Division of neurosurgery, department of surgery, university of Alberta hospital, Mackenzie health sciences centre, Edmonton, Alberta, Canada
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Atwood L, Lain R, Kotzander J, McCardle P, Mason B, Raymond J, Sears A. A casework study: The effect of the porcine digestive process on animal carcasses and human teeth. Forensic Sci Int 2023; 345:111617. [PMID: 36893679 DOI: 10.1016/j.forsciint.2023.111617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 10/19/2022] [Accepted: 02/25/2023] [Indexed: 03/02/2023]
Abstract
What happens if a human body is fed to pigs? Although a popular notion in the entertainment industry, no scientific published literature exists that documents this porcine feeding behaviour, nor, more importantly, what elements of the cadaver may survive such a process. A study conducted in 2020, born out of a casework enquiry, aimed to investigate the following two questions; Would pigs feed on a human body? And, if so, what could be recovered post feeding event? Kangaroo carcasses, porcine carcasses (as human analogues) and 90 human teeth were prepared, and fed, to two domestic pigs, in a variety of feed scenarios. Biological traces including bones, bone fragments, teeth and tooth fragments were recovered both post-digestion from the faeces of the pigs, as well as uneaten from the porcine enclosure. 29% of all human teeth were recovered from the study; 35% of which were recovered post-digestion from the faeces and 65% were recovered uneaten from the porcine enclosure, Of the recovered human teeth, 81% were deemed suitable for identification by a forensic odontologist. From the 447 bones recovered from the enclosure, 94% could be identified to a bone type and species. From all 3338 bone fragments recovered from the faeces of the pigs, none retained any morphological traits that would allow further intelligence to be generated. Overall, it was found that pigs will feed on human analogues and will consume soft tissue, bones, and human teeth. Biological traces in the form of bones, bone fragments, teeth and tooth fragments may be recovered both post-digestion from the faeces, or from the porcine enclosure. The biological traces can be used for identification of an individual via forensic odontology, identification of a species via forensic anthropology and may be suitable for DNA analysis. The outcomes of this study generated new avenues for investigation in the case and may be used to inform future operational resources.
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Affiliation(s)
- Lauren Atwood
- Science and Research Unit, Forensic Evidence and Technical Services Command, New South Wales Police Force, Sydney, Australia.
| | | | - Jessica Kotzander
- Science and Research Unit, Forensic Evidence and Technical Services Command, New South Wales Police Force, Sydney, Australia; University of Technology Sydney, Centre for Forensic Science, Broadway 2007, Australia
| | - Penny McCardle
- Newcastle Department of Forensic Medicine, NSW/McCardle Cultural Heritage, Newcastle, Australia
| | - Brett Mason
- Criminal Groups Squad, State Crime Command, New South Wales Police Force, Sydney, Australia
| | - Jennifer Raymond
- Science and Research Unit, Forensic Evidence and Technical Services Command, New South Wales Police Force, Sydney, Australia
| | - Alison Sears
- Science and Research Unit, Forensic Evidence and Technical Services Command, New South Wales Police Force, Sydney, Australia
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Crayle J, Lutz M, Raymond J, Mehta P, Bedlack R. Study of "ALS reversals": LifeTime environmental exposures (StARLiTE). Amyotroph Lateral Scler Frontotemporal Degener 2023; 24:54-62. [PMID: 35775279 DOI: 10.1080/21678421.2022.2090846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We previously reported on a series of patients diagnosed with ALS whom had an extraordinary course defined by substantial and sustained improvement in weakness and function. For this study, twenty-five of these "ALS Reversals" completed extensive environmental exposure questionnaires. These responses were then compared to a large database of prior responses from patients with typically progressive ALS (n = 6187). The results demonstrated that the "Reversal" participants have had a diverse number of exposures with substantial heterogeneity. In general, this was similar to the control group; however, there were a few specific differences that could be further explored in future research.
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Affiliation(s)
- J Crayle
- Department of Neurology, Washington University in Saint Louis, Saint Louis, MO, USA
| | - M Lutz
- Department of Neurology, Duke University, Durham, NC, USA
| | - J Raymond
- Centers for Disease Control and Prevention/Agency for Toxic Substances and Disease Registry, National ALS Registry, Atlanta, GA, USA
| | - P Mehta
- Centers for Disease Control and Prevention/Agency for Toxic Substances and Disease Registry, National ALS Registry, Atlanta, GA, USA
| | - R Bedlack
- Department of Neurology, Duke University, Durham, NC, USA
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Eneling J, Darsaut TE, Raymond J. Trying to learn research methodology from the vertebroplasty saga. Neurochirurgie 2023; 69:101400. [PMID: 36608448 DOI: 10.1016/j.neuchi.2022.101400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/09/2022] [Indexed: 01/06/2023]
Affiliation(s)
- J Eneling
- Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - J Raymond
- Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
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Darsaut TE, Collins J, Raymond J. Patients may be right: Clinical research should be designed in their best medical interest. Neurochirurgie 2023; 69:101391. [PMID: 36608449 DOI: 10.1016/j.neuchi.2022.101391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 09/23/2022] [Indexed: 01/05/2023]
Affiliation(s)
- T E Darsaut
- University of Alberta Hospital, Mackenzie Health Sciences Centre, Department of Surgery, Division of Neurosurgery, 112 Street, 8440 Edmonton, Alberta, Canada
| | - J Collins
- Centre hospitalier de l'université de Montréal - CHUM, Department of Radiology, Service of Interventional Neuroradiology, 1000, St-Denis street room, D03-5462B Montreal, Canada
| | - J Raymond
- Centre hospitalier de l'université de Montréal - CHUM, Department of Radiology, Service of Interventional Neuroradiology, 1000, St-Denis street room, D03-5462B Montreal, Canada.
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Eneling J, Darsaut TE, Patel M, Raymond J. Understanding explanatory and pragmatic trials: Examples from randomized controlled trials on vertebroplasty. Neurochirurgie 2023; 69:101403. [PMID: 36566693 DOI: 10.1016/j.neuchi.2022.101403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/09/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To better understand the explanatory-pragmatic distinction in the design and interpretation of randomized controlled trials (RCTs). METHODS We review the explanatory-pragmatic distinction in clinical trial design. We use the PRECIS-2 tool to evaluate the trial design of selected RCTs on percutaneous vertebroplasty for osteoporotic vertebral compression fractures. We discuss difficulties in the selection of criteria and in the construction of PRECIS diagrams. We also examine how inconsistency in the selection of various items of trial design can cause confusion in the interpretation of results. RESULTS The selection of criteria and the scoring of multiple PRECIS domains were subjective and thus debatable. The pragmascope patterns of various vertebroplasty trials were heterogeneous. Many trials had both pragmatic and explanatory components. Some placebo-controlled trial goals seem to have been explanatory, but their design actually included enough pragmatic items such that the meaning of negative trial results remains ambiguous. CONCLUSION The results of a trial cannot be interpreted without understanding the various design choices made along the explanatory-pragmatic spectrum.
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Affiliation(s)
- J Eneling
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada
| | - T E Darsaut
- Division of neurosurgery, department of surgery, university of Alberta hospital, Mackenzie health sciences centre, Edmonton, Alberta, Canada
| | - M Patel
- Division of neurosurgery, department of surgery, university of Alberta hospital, Mackenzie health sciences centre, Edmonton, Alberta, Canada
| | - J Raymond
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
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Eneling J, Darsaut TE, Veilleux C, Raymond J. Understanding power in randomized trials: The example of vertebroplasty. Neurochirurgie 2023; 69:101402. [PMID: 36621210 DOI: 10.1016/j.neuchi.2022.101402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/09/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVES Randomized trials (RCTs) should include a sufficient number of patients to reduce the risk that the observed outcome is a result of chance rather than from a truly different treatment effect. Trials must be even larger to claim an absence of treatment effect in a placebo-controlled trial. To estimate the size of the trial and maximize power, it is often suggested to use a comparison between the means of a continuous variable. METHODS We examine the RCTs that have compared vertebroplasty and placebo for patients with osteoporotic fractures. Most trials compared the means of a continuous pain score to yield implausibly small trials, as small as 24 patients per group. RESULTS The minimally significant difference between groups has no precise clinical meaning for patients when it is based on a comparison of means of pain scores. A comparison of the proportions of patients reaching a per-patient outcome measure of treatment success is much more pertinent if the trial is to inform the care of future patients. The resulting trials will admittedly need to be larger, but they will be much less likely to fall prey to the 'evidence of absence' fallacy. Furthermore, trial size should also take into consideration harder clinical outcome measures, such as death and disability. CONCLUSION When the goal of a trial is to inform outcome-based medical care, comparing the proportions of patients reaching a clinically pertinent outcome is more appropriate than comparing the means of a continuous variable.
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Affiliation(s)
- J Eneling
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada
| | - T E Darsaut
- Division of neurosurgery, department of surgery, university of Alberta hospital, Mackenzie health sciences centre, Edmonton, Alberta, Canada
| | - C Veilleux
- Division of neurosurgery, department of clinical neurosciences, university of Calgary, Alberta, Canada
| | - J Raymond
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
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Darsaut TE, Chagnon M, Raymond J. Reply. AJNR Am J Neuroradiol 2023; 44:E9-E10. [PMID: 36574315 PMCID: PMC9835901 DOI: 10.3174/ajnr.a7732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- T E Darsaut
- Department of Surgery, Division of NeurosurgeryMackenzie Health Sciences CentreUniversity of Alberta HospitalEdmonton, Alberta, Canada
| | - M Chagnon
- Department of Mathematics and StatisticsUniversité de MontréalMontreal, Quebec, Canada
| | - J Raymond
- Department of Radiology, Service of Interventional NeuroradiologyCentre Hospitalier de l'Université de MontréalMontreal, Quebec, Canada
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Raymond J, Collins J, Darsaut TE. Understanding the research-care demarcation and why it must be revised. Neurochirurgie 2023; 69:101393. [PMID: 36566695 DOI: 10.1016/j.neuchi.2022.101393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 09/23/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND A clean-cut separation between research and care was artificially created at the time of the Belmont report more than 40 years ago. The demarcation was initially controversial but eventually was implemented for political reasons. We examine why it must be revised. METHODS We review historical research scandals as well as the theoretical basis for the Belmont demarcation. We then discuss consequences on medical practice and propose an alternative. DISCUSSION Most research scandals involved abusing human beings supposedly for the sake of science. Belmont commissioners were aware the research/care problem was double-headed. While research subjects should be protected from abuse in the research context, patients need to be protected from unvalidated medical and surgical interventions in the care context. For political reasons the Commission recommended the regulation of research but to leave medical practice untouched. Thus the Commission had to distinguish research from care. The notion of 'generalizable knowledge' was introduced to define and regulate research, but the inadvertent result was that by trying to protect research subjects, the regulation has not only failed to protect all other patients, but also encouraged the widespread practice of unvalidated interventions within the care context. The notion of validated care should be re-introduced into a proper analysis of the care-research demarcation, for care research is an integral ingredient of a good medical practice. CONCLUSION The research-care demarcation should be revised to leave room for the validated/unvalidated care distinction. Care research, essential to guide medical practice, should be facilitated at all levels.
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Affiliation(s)
- J Raymond
- Centre Hospitalier de l'Université de Montréal-CHUM, Department of Radiology, Service of Interventional Neuroradiology, 1000 St-Denis, Montreal H2X 0C1, Canada.
| | - J Collins
- Centre Hospitalier de l'Université de Montréal-CHUM, Department of Radiology, Service of Interventional Neuroradiology, 1000 St-Denis, Montreal H2X 0C1, Canada.
| | - T E Darsaut
- University of Alberta Hospital, Mackenzie Health Sciences Centre, Department of Surgery, Division of Neurosurgery, 8440 - 112 Street, Edmonton T6G 2B7, Alberta, Canada.
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Eneling J, Darsaut TE, Veilleux C, Raymond J. Understanding the choice of control group: A systematic review of vertebroplasty trials for osteoporotic vertebral compression fractures. Neurochirurgie 2023; 69:101401. [PMID: 36566694 DOI: 10.1016/j.neuchi.2022.101401] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 11/09/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVES To better understand the choice of the comparator intervention in the design of clinical trials and its impact on the meaning of results we review randomized trials on vertebroplasty. METHODS We conducted a systematic and narrative review of all randomized trials on vertebroplasty. Trials are categorized according to the comparator intervention (non-surgical management, placebo/sham vertebroplasty, and kyphoplasty). RESULTS All trials were too small to show a difference in objective clinical outcomes, and 20 of 23 RCTs used mean pain scores to compare interventions. Most trials comparing vertebroplasty with non-surgical management concluded that vertebroplasty was superior. Trials comparing kyphoplasty with vertebroplasty showed similar results for both interventions. However, 4 of 5 trials comparing vertebroplasty with placebo surgery failed to show a significant difference between groups. CONCLUSION The clinical results of an intervention cannot be interpreted without a comparison that involves a control group. The choice of comparator intervention can change the meaning of the trial. A large pragmatic trial, using hard clinical outcomes such as morbidity and mortality as a primary outcome measure, would be needed to assess the potential clinical benefits of vertebroplasty.
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Affiliation(s)
- J Eneling
- Department of Radiology, Service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - C Veilleux
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Calgary, Alberta, Canada
| | - J Raymond
- Department of Radiology, Service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
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Raymond J. ALIGNING GERIATRIC EMERGENCY CARE WITH THE 4MS OF THE AGE-FRIENDLY HEALTH SYSTEM FRAMEWORK. Innov Aging 2022. [PMCID: PMC9770660 DOI: 10.1093/geroni/igac059.1336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
In 2019 Dartmouth-Hitchcock Medical Center (DHMC) was recognized by the Institute for Healthcare Improvement as a level 2 Age Friendly Health System (AFHS). Over the past two years DHMC leveraged the strengths of the AFHS to become a level 1 American College of Emergency Physicians (ACEP) accredited geriatric emergency department. Leveraging the paradigm of 4M care including: What Matter’s Most, Mobility, Medication and Mentation, DHMC achieved alignment between the geriatric emergency department accreditation and the AFHS framework. Pathways focusing on the 4Ms have been identified as a model to improve transitions of care post ED. This talk will focus on lessons learned and outcome data specific to the creation of the 4M pathways and transitions of care,
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Affiliation(s)
- Jennifer Raymond
- Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, United States
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Waszczuk JR, Peacock L, Chadwick S, Maynard P, Raymond J, Roux C. Misidentifications of alphanumeric characters in serial number restorations. AUST J FORENSIC SCI 2022. [DOI: 10.1080/00450618.2022.2149855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- J. R Waszczuk
- Centre for Forensic Science, School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Australia
- Firearms Identification & Armoury Team, Australian Federal Police, Majura, Australia
| | - L. Peacock
- Centre for Forensic Science, School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Australia
| | - S. Chadwick
- Centre for Forensic Science, School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Australia
| | - P. Maynard
- Centre for Forensic Science, School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Australia
| | - J. Raymond
- Science and Research Unit, Forensic Evidence & Technical Services Command, New South Wales Police Force, Sydney, Australia
| | - C. Roux
- Centre for Forensic Science, School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, Australia
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Raymond J, Obaid S, Darsaut TE. Why are surgical trials so difficult to accomplish, and then considered so definitive? Neurochirurgie 2022; 68:560-561. [PMID: 35787923 DOI: 10.1016/j.neuchi.2022.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 02/06/2023]
Affiliation(s)
- J Raymond
- Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - S Obaid
- Department of Neurosurgery, Comprehensive Epilepsy Center, Yale School of Medicine, New Haven, CT, USA
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Ducroux C, Boisseau W, Poppe AY, Daneault N, Deschaintre Y, Diestro JDB, Eneling J, Gioia LC, Iancu D, Maier B, Nauche B, Nico L, Odier C, Raymond J, Roy D, Stapf C, Weill A, Jacquin G. Successful Reperfusion is Associated with Favorable Functional Outcome despite Vessel Perforation during Thrombectomy: A Case Series and Systematic Review. AJNR Am J Neuroradiol 2022; 43:1633-1638. [PMID: 36175082 PMCID: PMC9731237 DOI: 10.3174/ajnr.a7650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 07/17/2022] [Indexed: 02/01/2023]
Abstract
BACKGROUND Arterial perforation is a potentially serious complication during endovascular thrombectomy. PURPOSE Our aim was to describe interventional approaches after arterial perforation during endovascular thrombectomy and to determine whether reperfusion remains associated with favorable outcome despite this complication. DATA SOURCES Data from consecutive patients with acute stroke undergoing endovascular thrombectomy were retrospectively collected between 2015 to 2020 from a single-center cohort, and a systematic review was performed using PubMed, EMBASE, and Ovid MEDLINE up to June 2020. STUDY SELECTION Articles reporting functional outcome after arterial perforation during endovascular thrombectomy were selected. DATA ANALYSIS Functional outcomes of patients achieving successful reperfusion (TICI 2b/3) were compared with outcomes of those with unsuccessful reperfusion in our single-center cohort. We then summarized the literature review to describe interventional approaches and outcomes after arterial perforation during endovascular thrombectomy. DATA SYNTHESIS In our single-center cohort, 1419 patients underwent endovascular thrombectomy, among whom 32 (2.3%) had vessel perforation and were included in the analysis. The most common hemostatic strategy was watchful waiting (71% of cases). Patients with successful reperfusion had a higher proportion of favorable 90-day mRS scores (60% versus 12.5%; P = .006) and a lower mortality rate (13.3% versus 56.3%, P = .01) than patients without successful reperfusion. Thirteen articles were included in the systematic review. Successful reperfusion also appeared to be associated with better outcomes. LIMITATIONS Given the low number of published reports, we performed only a descriptive analysis. CONCLUSIONS Arterial perforation during endovascular thrombectomy is rare but is associated with high mortality rates and poor outcome. However, successful reperfusion remains correlated with favorable outcome in these patients.
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Affiliation(s)
- C Ducroux
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Division of Neurology (C.D.), Department of Medicine, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - W Boisseau
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
- Department of Interventional Neuroradiology (W.B., B.M.), Hopital Fondation A. De Rothschild, Paris, France
| | - A Y Poppe
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - N Daneault
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - Y Deschaintre
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - J D B Diestro
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - J Eneling
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - L C Gioia
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - D Iancu
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - B Maier
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
- Department of Interventional Neuroradiology (W.B., B.M.), Hopital Fondation A. De Rothschild, Paris, France
- Université Paris-Cité (B.M.), Paris, France
| | - B Nauche
- Bibliothèque du Centre Hospitalier de l'Université de Montréal (B.N.), Montreal, Quebec, Canada
| | - L Nico
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - C Odier
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - J Raymond
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - D Roy
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - C Stapf
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
| | - A Weill
- Radiology (W.B., J.D.B.D., J.E., D.I., B.M., L.N., J.R., D.R., A.W.)
| | - G Jacquin
- From the Department of Neurosciences (C.D., A.Y.P., N.D., Y.D. L.C.G., C.O., C.S., G.J.), Faculté de médecine, Université de Montréal, Montréal, Quebec. Canada
- Departments of Medicine (Neurology) (C.D., A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.)
- Neurovascular Group (A.Y.P., N.D., Y.D., L.C.G., C.O., C.S., G.J.), Neurosciences Axis, Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Montréal, Quebec, Canada
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Raymond J, Darsaut TE. Lessons from landmark studies on the treatment of ruptured intracranial aneurysms. Neurochirurgie 2022; 68:469-470. [PMID: 35272856 DOI: 10.1016/j.neuchi.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- J Raymond
- Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), room D03.5462b, H2X 0C1 Montreal, QC, Canada.
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, 8440 112 St NW, Edmonton, Alberta, Canada
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Raymond J, Darsaut TE. Reporting the outcomes of medical or surgical treatments: The Tower of Babel. Neurochirurgie 2022; 68:483-484. [PMID: 35654612 DOI: 10.1016/j.neuchi.2022.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 02/06/2023]
Affiliation(s)
- J Raymond
- Centre hospitalier de l'Université de Montréal (CHUM), Department of Radiology, room D03.5462b, Montreal H2X 0C1, Quebec, Canada.
| | - T E Darsaut
- University of Alberta hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Boisseau W, Darsaut TE, Fahed R, Findlay JM, Bourcier R, Charbonnier G, Smajda S, Ognard J, Roy D, Gariel F, Carlson AP, Shotar E, Ciccio G, Marnat G, Sporns PB, Gaberel T, Jecko V, Weill A, Biondi A, Boulouis G, Bras AL, Aldea S, Passeri T, Boissonneau S, Bougaci N, Gentric JC, Diestro JDB, Omar AT, Al-Jehani HM, Hage GE, Volders D, Kaderali Z, Tsogkas I, Magro E, Holay Q, Zehr J, Iancu D, Raymond J. Surgical or Endovascular Treatment of MCA Aneurysms: An Agreement Study. AJNR Am J Neuroradiol 2022; 43:1437-1444. [PMID: 36137654 PMCID: PMC9575541 DOI: 10.3174/ajnr.a7648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/28/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND PURPOSE MCA aneurysms are still commonly clipped surgically despite the recent development of a number of endovascular tools and techniques. We measured clinical uncertainty by studying the reliability of decisions made for patients with middle cerebral artery (MCA) aneurysms. MATERIALS AND METHODS A portfolio of 60 MCA aneurysms was presented to surgical and endovascular specialists who were asked whether they considered surgery or endovascular treatment to be an option, whether they would consider recruitment of the patient in a randomized trial, and whether they would provide their final management recommendation. Agreement was studied using κ statistics. Intrarater reliability was assessed with the same, permuted portfolio of cases of MCA aneurysm sent to the same specialists 1 month later. RESULTS Surgical management was the preferred option for neurosurgeons (n = 844/1320; [64%] responses/22 raters), while endovascular treatment was more commonly chosen by interventional neuroradiologists (1149/1500 [76.6%] responses/25 raters). Interrater agreement was only "slight" for all cases and all judges (κ = 0.094; 95% CI, 0.068-0.130). Agreement was no better within specialties or with more experience. On delayed requestioning, 11 of 35 raters (31%) disagreed with themselves on at least 20% of cases. Surgical management and endovascular treatment were always judged to be a treatment option, for all patients. Trial participation was offered to patients 65% of the time. CONCLUSIONS Individual clinicians did not agree regarding the best management of patients with MCA aneurysms. A randomized trial comparing endovascular with surgical management of patients with MCA aneurysms is in order.
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Affiliation(s)
- W Boisseau
- From the Department of Radiology (W.B., D.R., A.W., D.I., J.R.), Division of Neuroradiology
| | - T E Darsaut
- Department of Surgery (T.E.D., J.M.F.), Division of Neurosurgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - R Fahed
- Department of Medicine (R.F.), Division of Neurology, The Ottawa Hospital, Ottawa Hospital Research Institute and University of Ottawa, Ottawa, Ontario, Canada
| | - J M Findlay
- Department of Surgery (T.E.D., J.M.F.), Division of Neurosurgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - R Bourcier
- Department of Neuroradiology (R.B.), University Hospital of Nantes, Nantes, France
| | - G Charbonnier
- Departments of Interventional Neuroradiology (G. Charbonnier, A.B.)
| | - S Smajda
- Departments of Interventional Neuroradiology (S.S.)
| | - J Ognard
- Department of Interventional Neuroradiology (J.O., J.C.G.), Hôpital de la Cavale Blanche, Brest, Bretagne, France
| | - D Roy
- From the Department of Radiology (W.B., D.R., A.W., D.I., J.R.), Division of Neuroradiology
| | - F Gariel
- Departments of Neuroradiology (F.G., G.M.)
| | - A P Carlson
- Department of Neurosurgery (A.P.C.), University of New Mexico Hospital, Albuquerque, New Mexico
| | - E Shotar
- Department of Neuroradiology (E.S.), Groupe Hospitalier de Pitié Salpêtrière, Paris, France
| | - G Ciccio
- Department of Interventional Neuroradiology (G. Ciccio), Centre Hospitalier de Bastia, Bastia, Corse, France
| | - G Marnat
- Departments of Neuroradiology (F.G., G.M.)
| | - P B Sporns
- Department of Neuroradiology (P.B.S., I.T.), Clinic of Radiology and Nuclear Medicine, University Hospital Basel, Basel, Switzerland
- Department of Diagnostic and Interventional Neuroradiology (P.B.S.), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - T Gaberel
- Department of Neurosurgery (T.G.), University Hospital of Caen, Caen, France
| | - V Jecko
- Neurosurgery (V.J.), University Hospital of Bordeaux, Bordeaux, France
| | - A Weill
- From the Department of Radiology (W.B., D.R., A.W., D.I., J.R.), Division of Neuroradiology
| | - A Biondi
- Departments of Interventional Neuroradiology (G. Charbonnier, A.B.)
| | - G Boulouis
- Department of Neuroradiology (G.B.), University Hospital of Tours, Tours, Indre et Loire, France
| | - A L Bras
- Department of Radiology (A.L.B.), Groupement Hospitaliser Bretagne Atlantique-Hôpital Chubert, Vannes, Bretagne, France
| | - S Aldea
- Neurosurgery (S.A.), Fondation Ophtalmologique Adolphe de Rothschild, Paris, France
| | - T Passeri
- Department of Neurosurgery (T.P.), Lariboisière Hospital, Assistance Publique Hôpitaux de Paris, University of Paris, Paris, France
| | - S Boissonneau
- Department of Neurosurgery (S.B.), La Timone Hospital
- L'Institut National de la Santé et de la Recherche Médicale (S.B.), Institut de Neurosciences des Systèmes, Aix Marseille University, Marseille, France
| | - N Bougaci
- Neurosurgery (N.B.), Besançon University Hospital, Besançon, France
| | - J C Gentric
- Department of Interventional Neuroradiology (J.O., J.C.G.), Hôpital de la Cavale Blanche, Brest, Bretagne, France
| | - J D B Diestro
- Division of Diagnostic and Therapeutic Neuroradiology (J.D.B.D.), Department of Medical Imaging, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - A T Omar
- Division of Neurosurgery (A.T.O.), Department of Surgery, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - H M Al-Jehani
- Department of Neurosurgery, Radiology and Critical Care Medicine (H.M.A.-J.), King Fahad Hospital of the University, Imam Abdulrahman bin Faisal University, Alkhobar, Saudi Arabia
| | - G El Hage
- Department of Neurosurgery (G.E.H.), Centre Hospitalier de l'Université de Montréal,Montreal, Québec, Canada
| | - D Volders
- Department of Radiology (D.V.), Dalhousie University, Halifax, Nova Scotia, Canada
| | - Z Kaderali
- Division of Neurosurgery (Z.K.), GB1-Health Sciences Centre, Winnipeg, Manitoba, Canada
| | - I Tsogkas
- Department of Neuroradiology (P.B.S., I.T.), Clinic of Radiology and Nuclear Medicine, University Hospital Basel, Basel, Switzerland
| | - E Magro
- Department of Neurosurgery (E.M.), Centre Hospitalier Universitaire Cavale Blanche, UBO L'Institut National de la Santé et de la Recherche Médicale, LaTIM UMR 1101, Brest, France
| | - Q Holay
- Department of Radiology (Q.H.), Hôpital d'Instruction des Armées Saint-Anne, Toulon, France
| | - J Zehr
- Department of Mathematics and Statistics (J.Z.), Pavillon André-Aisenstadt,Montreal, Québec, Canada
| | - D Iancu
- From the Department of Radiology (W.B., D.R., A.W., D.I., J.R.), Division of Neuroradiology
| | - J Raymond
- From the Department of Radiology (W.B., D.R., A.W., D.I., J.R.), Division of Neuroradiology
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Raymond J, Iancu D, Boisseau W, Diestro JDB, Klink R, Chagnon M, Zehr J, Drake B, Lesiuk H, Weill A, Roy D, Bojanowski MW, Chaalala C, Rempel JL, O'Kelly C, Chow MM, Bracard S, Darsaut TE. Flow Diversion in the Treatment of Intracranial Aneurysms: A Pragmatic Randomized Care Trial. AJNR Am J Neuroradiol 2022; 43:1244-1251. [PMID: 35926886 PMCID: PMC9451626 DOI: 10.3174/ajnr.a7597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 06/28/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND PURPOSE Flow diversion is a recent endovascular treatment for intracranial aneurysms. We compared the safety and efficacy of flow diversion with the alternative standard management options. MATERIALS AND METHODS A parallel group, prerandomized, controlled, open-label pragmatic trial was conducted in 3 Canadian centers. The trial included all patients considered for flow diversion. A Web-based platform 1:1 randomly allocated patients to flow diversion or 1 of 4 alternative standard management options (coiling with/without stent placement, parent vessel occlusion, surgical clipping, or observation) as prespecified by clinical judgment. Patients ineligible for alternative standard management options were treated with flow diversion in a registry. The primary safety outcome was death or dependency (mRS > 2) at 3 months. The composite primary efficacy outcome included the core lab-determined angiographic presence of a residual aneurysm, aneurysm rupture, progressive mass effect during follow-up, or death or dependency (mRS > 2) at 3-12 months. RESULTS Between May 2011 and November 2020, three hundred twenty-three patients were recruited: Two hundred seventy-eight patients (86%) had treatment randomly allocated (139 to flow diversion and 139 to alternative standard management options), and 45 (14%) received flow diversion in the registry. Patients in the randomized trial frequently had unruptured (83%), large (52% ≥10 mm) carotid (64%) aneurysms. Death or dependency at 3 months occurred in 16/138 patients who underwent flow diversion and 12/137 patients receiving alternative standard management options (relative risk, 1.33; 95% CI, 0.65-2.69; P = .439). A poor primary efficacy outcome was found in 30.9% (43/139) with flow diversion and 45.6% (62/136) of patients receiving alternative standard management options, with an absolute risk difference of 14.7% (95% CI, 3.3%-26.0%; relative risk, 0.68; 95% CI, 0.50-0.92; P = .014). CONCLUSIONS For patients with mostly unruptured, large, anterior circulation (carotid) aneurysms, flow diversion was more effective than the alternative standard management option in terms of angiographic outcome.
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Affiliation(s)
- J Raymond
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
| | - D Iancu
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
- Departments of Radiology (D.I.)
| | - W Boisseau
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
| | - J D B Diestro
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
| | - R Klink
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
| | - M Chagnon
- Department of Mathematics and Statistics (M.C., J.Z.), Université de Montréal, Montreal, Canada
| | - J Zehr
- Department of Mathematics and Statistics (M.C., J.Z.), Université de Montréal, Montreal, Canada
| | - B Drake
- Surgery (B.D., H.L.), Ottawa Hospital, Civic Campus, Ottawa, Ontario, Canada
| | - H Lesiuk
- Surgery (B.D., H.L.), Ottawa Hospital, Civic Campus, Ottawa, Ontario, Canada
| | - A Weill
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
| | - D Roy
- From the Department of Radiology (J.R., D.I., W.B., J.D.B.D., R.K., A.W., D.R.), Centre Hospitalier de l'Université de Montréal, Quebec, Canada
| | - M W Bojanowski
- Department of Neurosurgery (M.W.B., C.C.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, Montreal, Quebec, Canada
| | - C Chaalala
- Department of Neurosurgery (M.W.B., C.C.), Centre Hospitalier de l'Université de Montréal, Notre-Dame Hospital, Montreal, Quebec, Canada
| | | | - C O'Kelly
- Surgery (C.O., M.M.C., T.E.D.), Division of Neurosurgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - M M Chow
- Surgery (C.O., M.M.C., T.E.D.), Division of Neurosurgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - S Bracard
- Neuroradiology (S.B.), CHRU de Nancy, Nancy, Lorraine, France
| | - T E Darsaut
- Surgery (C.O., M.M.C., T.E.D.), Division of Neurosurgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Burmuzoska I, Hogg K, Raymond J, Hitchcock C, Meakin GE. Comparison of operational DNA recovery methods: Swabs versus tapelifts. Forensic Science International: Genetics Supplement Series 2022. [DOI: 10.1016/j.fsigss.2022.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Obaid S, Darsaut TE, Raymond J. Understanding the problems with recruitment in surgical randomized trials: A lesson from landmark trials on temporal lobe epilepsy. Neurochirurgie 2022; 68:612-617. [PMID: 35787925 DOI: 10.1016/j.neuchi.2022.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 11/18/2022]
Abstract
BACKGROUND Surgical randomized trials are difficult to accomplish. One major problem is recruitment of a sufficient number of patients to address the clinical problem. METHODS We review the various ways patient recruitment in surgical RCTs can be promoted. We examine two landmark trials on the surgical treatment of temporal lobe epilepsy (TLE), one that was successful, and one which did not attain the target number of participants. DISCUSSION Both designs of the Canadian and American trials of surgery for TLE included a benefit to participants: the Canadian trial gave a chance to have immediate access to investigation and treatment, as compared to a 1 year delay (considered 'standard care' in that center), while the American trial offered free surgical management to both arms. Patients were recruited and treatments randomly allocated prior to knowing for certain whether they were surgical candidates or not. This design choice may have helped circumvent the 'equipoise problem'. The Canadian trial offered participation to drug-resistant patients that were already routinely referred to surgical centers, while the success of the American trial which limited recruitment to the early period of drug resistance was dependent on a change of practice of referring clinicians which did not materialize. CONCLUSION The surgical treatment of drug-resistant temporal lobe epilepsy has been validated using RCT methods. Ways to promote participation in surgical trials should be further investigated.
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Affiliation(s)
- S Obaid
- Department of Neurosurgery, Comprehensive Epilepsy Center, Yale School of Medicine, New Haven, CT, USA
| | - T E Darsaut
- University of Alberta Hospital, Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - J Raymond
- Department of Radiology, Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
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Raymond J, Magro E, Darsaut TE. Understanding burden of proof and equipoise in the design of pragmatic clinical trials: An example from a trial on brain arteriovenous malformations. Neurochirurgie 2022; 68:608-611. [PMID: 35787924 DOI: 10.1016/j.neuchi.2022.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND PURPOSE The burden of proof principle is rarely discussed and poorly understood, but central to the proper design of pragmatic clinical trials. A better understanding of the principle could play an important role in the re-introduction of scientific methods within practice and in revising fundamental problems with the current research-care separation. METHODS We analyze the design of the ARUBA trial on the management of unruptured brain arteriovenous malformations. We also review how the concept of clinical equipoise was introduced to address a misconceived problem of research ethics. RESULTS The ARUBA trial hypothesis in favour of conservative management of brain arteriovenous malformations failed to take into account the fact that the burden of proof was on surgery, endovascular treatment or radiation therapy. Thus, results remained inconclusive and other trials are needed. The equipoise notion fails to take into account that the burden of proof is on unvalidated medical or surgical interventions, if we want to provide outcome-based medical care that patients can trust. CONCLUSION The burden of proof principle is essential to properly design pragmatic trials. This principle also explains why in certain circumstances optimal care is a randomized care trial.
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Affiliation(s)
- J Raymond
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - E Magro
- Service de neurochirurgie, CHU Cavale-Blanche, Inserm UMR 1101 LaTIM, Brest, France
| | - T E Darsaut
- Division of neurosurgery, department of surgery, university of Alberta hospital, Mackenzie Health Sciences Centre, 8440 112St NW, Edmonton, Alberta, Canada
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Raymond J, Benomar A, Darsaut TE. Understanding the reliability of trial outcome measures: The example of angiographic results of surgical or endovascular treatments of aneurysms. Neurochirurgie 2022; 68:485-487. [PMID: 35654613 DOI: 10.1016/j.neuchi.2022.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND The reliability of outcome measures is of central importance in clinical research. Studies of reliability remain rare in the neurovascular field. METHODS A narrative review of the history (1997-2021) of reporting angiographic results of the surgical or endovascular treatments of aneurysms serves to illustrate the importance of precisely defining outcome measures. We also review how the reliability of an angiographic classification system was studied. DISCUSSION Outcome measures are commonly used without precise definitions. When definitions or classification systems exist, they are rarely verified for their reliability. Twenty-five years following its introduction, a classification of angiographic results of aneurysm treatments is still being studied and modified. CONCLUSION The reliability of outcome measures should be made a research priority if we are to practice outcome-based medical or surgical care.
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Affiliation(s)
- J Raymond
- Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - A Benomar
- Department of Radiology, service of Neuroradiology, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - T E Darsaut
- Department of Surgery, division of Neurosurgery, University of Alberta hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
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Devlin C, Chadwick S, Moret S, Baechler S, Raymond J, Morelato M. The potential of using the forensic profiles of Australian fraudulent identity documents to assist intelligence-led policing. AUST J FORENSIC SCI 2022. [DOI: 10.1080/00450618.2022.2074138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ciara Devlin
- Centre for Forensic Science, University of Technology, Sydney, New South Wales, Australia
| | - Scott Chadwick
- Centre for Forensic Science, University of Technology, Sydney, New South Wales, Australia
| | - Sebastien Moret
- Centre for Forensic Science, University of Technology, Sydney, New South Wales, Australia
| | - Simon Baechler
- Ecole des Sciences Criminelles, University of Lausanne, Lausanne, Switzerland
- Department of forensic science and crime intelligence, Police neuchâteloise, Neuchâtel, Switzerland
- Forensic Research Group (LRC), Université du Québec à Trois-Rivières, Trois-Rivières, Quebec, Canada
| | - Jennifer Raymond
- Forensic Evidence and Technical Services Command, New South Wales Police Force, Sydney, New South Wales, Australia
| | - Marie Morelato
- Centre for Forensic Science, University of Technology, Sydney, New South Wales, Australia
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Raymond J, Létourneau-Guillon L, Darsaut TE, Findlay JM, Chow MM, Keough MB, Chan AM, Farzin B, Gevry G, Chagnon M, Zehr J. Reply. AJNR Am J Neuroradiol 2022; 43:E4. [PMID: 35241423 PMCID: PMC8910809 DOI: 10.3174/ajnr.a7454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- J. Raymond
- Department of Radiology, Neuroradiology Service Centre Hospitalier de l’Université de Montréal (CHUM), Montreal Quebec, CanadaCHUM Research Centre, MontrealQuebec, Canada
| | - L. Létourneau-Guillon
- Department of Radiology, Neuroradiology Service Centre Hospitalier de l’Université de Montréal (CHUM), Montreal Quebec, CanadaCHUM Research Centre, MontrealQuebec, Canada
| | - T E Darsaut
- Department of Surgery, Division of Neurosurgery University of Alberta hospital, Mackenzie Health Sciences Center, EdmontonAlberta, Canada
| | - J M Findlay
- Department of Surgery, Division of Neurosurgery University of Alberta hospital, Mackenzie Health Sciences Center, EdmontonAlberta, Canada
| | - M M Chow
- Department of Surgery, Division of Neurosurgery University of Alberta hospital, Mackenzie Health Sciences Center, EdmontonAlberta, Canada
| | - M B Keough
- Department of Surgery, Division of Neurosurgery University of Alberta hospital, Mackenzie Health Sciences Center, EdmontonAlberta, Canada
| | - A M Chan
- Department of Surgery, Division of Neurosurgery University of Alberta hospital, Mackenzie Health Sciences Center, EdmontonAlberta, Canada
| | | | - G Gevry
- CHUM Research Centre, MontrealQuebec, Canada
| | - M Chagnon
- Department of Mathematics and Statistics Université de Montréal, Montreal Quebec, Canada
| | - J Zehr
- Department of Mathematics and Statistics Université de Montréal, Montreal Quebec, Canada
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Stahl JP, Castan B, Bonnet E, Bru JP, Cohen R, Diamantis S, Faye A, Hitoto H, Issa N, Lesprit P, Maulin L, Poitrenaud D, Raymond J, Strady C, Varon E, Verdon R, Vuotto F, Welker Y, Gauzit R. Utilization of macrolides: State of the art 2022 Spilf and GPIP. Infect Dis Now 2022; 52:252-266. [DOI: 10.1016/j.idnow.2022.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Raymond J, Darsaut TE. Reprint of: We need less research, better research, and research done for the right reasons. Neurochirurgie 2022; 68:147. [PMID: 35074167 DOI: 10.1016/j.neuchi.2021.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- J Raymond
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - T E Darsaut
- Division of neurosurgery, department of surgery, Mackenzie health sciences centre, university of Alberta hospital, 8440 112St NW, Edmonton, Alberta, Canada
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Darsaut T, Keough M, Chan A, Farzin B, Findlay J, Chow M, Chagnon M, Zehr J, Gevry G, Raymond J. Transcranial Doppler Velocities and Angiographic Vasospasm after SAH: A Diagnostic Accuracy Study. AJNR Am J Neuroradiol 2022; 43:80-86. [PMID: 34794947 PMCID: PMC8757545 DOI: 10.3174/ajnr.a7347] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/14/2021] [Indexed: 01/03/2023]
Abstract
BACKGROUND AND PURPOSE After aneurysmal SAH, transcranial Doppler is commonly used to monitor cerebral vasospasm. The diagnostic accuracy of transcranial Doppler flow velocity values in detecting angiographic vasospasm in patients requiring urgent endovascular intervention has not been established. MATERIALS AND METHODS We performed a retrospective analysis of a consecutive series of patients with aneurysmal SAH who underwent transcranial Doppler (index test) within 24 hours of conventional angiography (reference test). The judgment of 33%, 50%, and 66% degree of vessel narrowing on angiography was independently established by multiple neuroendovascular clinicians. Vessel-specific per-segment and per-patient transcranial Doppler velocities were studied using receiver operating characteristic curves, the Youden index, and minimal acceptable sensitivity models. Optimal mean flow-velocity thresholds were explored to calculate sensitivity and specificity using a per-patient judgment of vasospasm of at least 50% angiographic narrowing in any large arterial segment except A1. RESULTS In 221 patients, vasospasm was found in 15%, 8%, and 4% of arteries when the degree of reference angiographic luminal narrowing was 33%, 50%, and 66%, respectively. Mean flow velocities were significantly higher in vasospastic segments (P = . 001), but per-segment exploratory analyses yielded unsound mean flow velocity thresholds. The Youden and minimal acceptable sensitivity models proposed mean flow velocity thresholds of approximately 160 cm/s for the anterior circulation and 80 cm/s for the posterior circulation in the per-patient diagnosis of angiographic vasospasm (≥50%), yielding a sensitivity of 80%-90% (95% CI, 0.77-0.96), but with a corresponding specificity of 50% (95% CI, 0.40-0.56). CONCLUSIONS In this study, a threshold transcranial Doppler mean flow-velocity value that would accurately diagnose ≥50% angiographic vasospasm remained elusive.
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Affiliation(s)
- T.E. Darsaut
- From the Division of Neurosurgery (T.E.D., M.B.K., A.M.C., J.M.F., M.M.C.), Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - M.B. Keough
- From the Division of Neurosurgery (T.E.D., M.B.K., A.M.C., J.M.F., M.M.C.), Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - A.M. Chan
- From the Division of Neurosurgery (T.E.D., M.B.K., A.M.C., J.M.F., M.M.C.), Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - B. Farzin
- Department of Radiology (B.F., G.G., J.R.), Centre Hospitalier de l’Université de Montréal, Montreal, Quebec, Canada
| | - J.M. Findlay
- From the Division of Neurosurgery (T.E.D., M.B.K., A.M.C., J.M.F., M.M.C.), Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - M.M. Chow
- From the Division of Neurosurgery (T.E.D., M.B.K., A.M.C., J.M.F., M.M.C.), Department of Surgery, University of Alberta Hospital, Mackenzie Health Sciences Centre, Edmonton, Alberta, Canada
| | - M. Chagnon
- Department of Mathematics and Statistics (M.C., J.Z.), Pavillon André-Aisenstadt, Montreal, Quebec, Canada
| | - J. Zehr
- Department of Mathematics and Statistics (M.C., J.Z.), Pavillon André-Aisenstadt, Montreal, Quebec, Canada
| | - G. Gevry
- Department of Radiology (B.F., G.G., J.R.), Centre Hospitalier de l’Université de Montréal, Montreal, Quebec, Canada
| | - J. Raymond
- Department of Radiology (B.F., G.G., J.R.), Centre Hospitalier de l’Université de Montréal, Montreal, Quebec, Canada
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Prasad E, Hitchcock C, Raymond J, Cole A, Barash M, McNevin D, van Oorschot RAH. Touch DNA recovery from unfired and fired cartridges: Comparison of swabbing, tape lifting and soaking. Forensic Sci Int 2021; 330:111101. [PMID: 34801815 DOI: 10.1016/j.forsciint.2021.111101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/21/2021] [Accepted: 11/07/2021] [Indexed: 11/04/2022]
Abstract
Over the recent few years, several DNA collection techniques and methodologies have been published for the recovery of DNA from fired cartridge cases. In this study, swabbing, the DNA collection technique currently used in our jurisdiction (NSW, Australia), was compared with tape lifting and soaking to assess DNA recovery rates, DNA quality and profile quality. Brass .22LR and 9mmP cartridges were used as they are the most commonly encountered in our jurisdiction. The cartridges (n = 107) were loaded into cleaned firearm magazines by three volunteers of unknown shedder status, to mimic routine casework sample types. Half of the handled cartridges were fired whilst the other half were kept unfired. STR genotypes were produced at both 29 and 30 PCR cycles to evaluate which improved handler allele detection. DNA recovery rates showed that swabbing recovered significantly less DNA than tape lifting and soaking. Whilst there were no significant differences between tape lifting and soaking, tape lifting, on average, yielded more DNA than soaking. The calibre of ammunition had no influence on DNA recovery and in line with expectations, firing was found to decrease DNA recovery for all three sampling techniques. Assessment of DNA quality showed no evidence of PCR inhibition in any of the samples for this study. However, degradation indices showed that most samples were slightly to moderately degraded. Fewer handler alleles were detected from both fired tape lifted and soaked cartridges than unfired cartridges. Whilst 30 amplification cycles allowed for the detection of slightly more handler alleles, no statistically significant differences were found between 29 and 30 PCR cycles. Nonetheless, 50% of the profiles from unfired soaked cartridges that were non-uploadable after 29 cycles were uploadable after 30 cycles. Furthermore, 83% of profiles from unfired cartridges that were tape lifted were uploadable onto our jurisdiction's database at both 29 and 30 PCR cycles. All magazine controls, despite cleaning, contained some level of background DNA. Furthermore, increasing the number of PCR cycles to 30 also increased the detection of non-handler alleles in DNA profiles. Our results suggest tape lifting yields more uploadable profiles from unfired and fired cartridge cases than swabbing but also more adventitious (non-handler) alleles. However additional research will be needed to evaluate the full potential of this method.
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Affiliation(s)
- Elisha Prasad
- Centre for Forensic Science, School of Mathematical & Physical Sciences, Faculty of Science, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia.
| | - Catherine Hitchcock
- NSW Health Pathology, Forensic & Analytical Science Service, PO Box 162, Lidcombe, NSW 1825, Australia
| | - Jennifer Raymond
- Forensic Evidence & Technical Services Command, NSW Police Force, 151 - 241 Goulburn Street, Surry Hills, NSW 2150, Australia
| | - Andrew Cole
- Ballistics Investigation Section, NSW Police Force, 151 - 241 Goulburn Street, Surry Hills, NSW 2010, Australia
| | - Mark Barash
- Centre for Forensic Science, School of Mathematical & Physical Sciences, Faculty of Science, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia; Justice Studies Department, San Jose State University, One Washington Square, San Jose, CA 95192, USA
| | - Dennis McNevin
- Centre for Forensic Science, School of Mathematical & Physical Sciences, Faculty of Science, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
| | - Roland A H van Oorschot
- Office of the Chief Forensic Scientist, Victoria Police Forensic Services Centre, 31 Forensic Drive, Macleod, Victoria 3085, Australia; School of Molecular Sciences, La Trobe University, Bundoora, Victoria 3086, Australia
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Benomar A, Farzin B, Gevry G, Boisseau W, Roy D, Weill A, Iancu D, Guilbert F, Létourneau-Guillon L, Jacquin G, Chaalala C, Bojanowski MW, Labidi M, Fahed R, Volders D, Nguyen TN, Gentric JC, Magro E, Boulouis G, Forestier G, Hak JF, Ghostine JS, Kaderali Z, Shankar JJ, Kotowski M, Darsaut TE, Raymond J. Noninvasive Angiographic Results of Clipped or Coiled Intracranial Aneurysms: An Inter- and Intraobserver Reliability Study. AJNR Am J Neuroradiol 2021; 42:1615-1620. [PMID: 34326106 DOI: 10.3174/ajnr.a7236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/28/2021] [Indexed: 01/16/2023]
Abstract
BACKGROUND AND PURPOSE Noninvasive angiography is commonly used to assess the outcome of surgical or endovascular treatment of intracranial aneurysms in clinical series or randomized trials. We sought to assess whether a standardized 3-grade classification system could be reliably used to compare the CTA and MRA results of both treatments. MATERIALS AND METHODS An electronic portfolio composed of CTAs of 30 clipped and MRAs of 30 coiled aneurysms was independently evaluated by 24 raters of diverse experience and training backgrounds. Twenty raters performed a second evaluation 1 month later. Raters were asked which angiographic grade and management decision (retreatment; close or long-term follow-up) would be most appropriate for each case. Agreement was analyzed using the Krippendorff α (αK) statistic, and the relationship between angiographic grade and clinical management choice, using the Fisher exact and Cramer V tests. RESULTS Interrater agreement was substantial (αK = 0.63; 95% CI, 0.55-0.70); results were slightly better for MRA results of coiling (αK = 0.69; 95% CI, 0.56-0.76) than for CTA results of clipping (αK = 0.58; 95% CI, 0.44-0.69). Intrarater agreement was substantial to almost perfect. Interrater agreement regarding clinical management was moderate for both clipped (αK = 0.49; 95% CI, 0.32-0.61) and coiled subgroups (αK = 0.47; 95% CI, 0.34-0.54). The choice of clinical management was strongly associated with the size of the residuum (mean Cramer V = 0.77 [SD, 0.14]), but complete occlusions (grade 1) were followed more closely after coiling than after clipping (P = .01). CONCLUSIONS A standardized 3-grade scale was found to be a reliable and clinically meaningful tool to compare the results of clipping and coiling of aneurysms using CTA or MRA.
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Affiliation(s)
- A Benomar
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - B Farzin
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - G Gevry
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - W Boisseau
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - D Roy
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - A Weill
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - D Iancu
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - F Guilbert
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - L Létourneau-Guillon
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
| | - G Jacquin
- Department of Medicine, Division of Neurology (G.J.)
| | - C Chaalala
- Division of Neurosurgery (C.C., M.W.B., M.L.), Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada
| | - M W Bojanowski
- Division of Neurosurgery (C.C., M.W.B., M.L.), Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada
| | - M Labidi
- Division of Neurosurgery (C.C., M.W.B., M.L.), Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada
| | - R Fahed
- Division ofNeurology (R.F.), The Ottawa Hospital Ottawa, Ontario, Canada
| | - D Volders
- Department of Diagnostic Radiology (D.V.), Queen Elizabeth II Health Sciences Centre, Halifax, Nova Scotia, Canada
| | - T N Nguyen
- Departments of Neurology, Neurosurgery, and Radiology (T.N.N.), Boston Medical Center, Boston, Massachusetts
| | - J-C Gentric
- Departments of Interventional Neuroradiology (J.-C.G.)
| | - E Magro
- Neurosurgery (E.M.), Hôpital de la Cavale Blanche, Centre Hospitalier Régional et Universitaire de Brest, Brest, France
| | - G Boulouis
- Department of Neuroradiology (G.B.), Centre Hospitalier Régional et Universitaire de Tours, Tours, France
| | - G Forestier
- Department of Neuroradiology (G.F.), University Hospital of Limoges, Limoges, France
| | - J-F Hak
- Department of Medical Imaging (J.-F.H.), University Hospital Timone Assistance Publique - Hôpitaux de Marseille, Marseille, France
| | - J S Ghostine
- Department of Radiology (J.S.G.), Jean-Talon Hospital, Montreal, Quebec, Canada
| | | | - J J Shankar
- Department of Radiology (J.J.S.), Health Sciences Centre, Winnipeg, Manitoba, Canada
| | - M Kotowski
- Department of Neurosurgery (M.K.), Hôpital de la Providence, Neuchâtel, Switzerland
| | - T E Darsaut
- Department of Surgery (T.E.D.), Division of Neurosurgery,Walter C. Mackenzie Health Sciences Centre, University of Alberta Hospital, Edmonton, Alberta, Canada
| | - J Raymond
- From the Department of Radiology (A.B., B.F., G.G., W.B., D.R., A.W., D.I., F.G., L.L.-G., J.R.)
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Prasad E, Atwood L, van Oorschot RAH, McNevin D, Barash M, Raymond J. Trace DNA recovery rates from firearms and ammunition as revealed by casework data. AUST J FORENSIC SCI 2021. [DOI: 10.1080/00450618.2021.1939783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Elisha Prasad
- Centre for Forensic Science, School of Mathematical & Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, Australia
| | - Lauren Atwood
- Science and Research Unit, Forensic Evidence & Technical Services Command, NSW Police Force, Level 5, Sydney Police Centre, Surry Hills, Australia
| | - Roland A. H. van Oorschot
- Victoria Police Forensic Services Department, Office of the Chief Forensic Scientist, Macleod, Australia
- School of Molecular Sciences, La Trobe University, Bundoora, Australia
| | - Dennis McNevin
- Centre for Forensic Science, School of Mathematical & Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, Australia
| | - Mark Barash
- Centre for Forensic Science, School of Mathematical & Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, Australia
- Department of Justice Studies, San Jose State University, San Jose, CA, USA
| | - Jennifer Raymond
- Science and Research Unit, Forensic Evidence & Technical Services Command, NSW Police Force, Level 5, Sydney Police Centre, Surry Hills, Australia
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Del Valle A, Acosta-Rivero N, Laborde RJ, Cruz-Leal Y, Cabezas S, Luzardo MC, Alvarez C, Labrada M, Rodríguez A, Rodríguez GL, Raymond J, Nogueira CV, Grubaugh D, Fernández LE, Higgins D, Lanio ME. Sticholysin II shows similar immunostimulatory properties to LLO stimulating dendritic cells and MHC-I restricted T cell responses of heterologous antigen. Toxicon 2021; 200:38-47. [PMID: 34237340 DOI: 10.1016/j.toxicon.2021.06.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 06/22/2021] [Accepted: 06/30/2021] [Indexed: 10/20/2022]
Abstract
Induction of CD8+ T cell responses against tumor cells and intracellular pathogens is an important goal of modern vaccinology. One approach of translational interest is the use of liposomes encapsulating pore-forming proteins (PFPs), such as Listeriolysin O (LLO), which has shown efficacy at priming strong and sustained CD8+ T cell responses. Recently, we have demonstrated that Sticholysin II (StII), a PFP from the sea anemone Stichodactyla helianthus, co-encapsulated into liposomes with ovalbumin (OVA) was able to stimulate, antigen presenting cells, antigen-specific CD8+ T cells and anti-tumor activity in mice. In the present study, we aimed to compare StII and LLO in terms of their abilities to stimulate dendritic cells and to induce major histocompatibility complex (MHC) class I restricted T cell responses against OVA. Interestingly, StII exhibited similar abilities to LLO in vitro of inducing dendritic cells maturation, as measured by increased expression of CD40, CD80, CD86 and MHC-class II molecules, and of stimulating OVA cross-presentation to a CD8+ T cell line. Remarkably, using an ex vivo Enzyme-Linked ImmunoSpot Assay (ELISPOT) to monitor gamma interferon (INF-γ) producing effector memory CD8+ T cells, liposomal formulations containing either StII or LLO induced comparable frequencies of OVA-specific INF-γ producing CD8+ T cells in mice that were sustained in time. However, StII-containing liposomes stimulated antigen-specific memory CD8+ T cells with a higher potential to secrete IFN-γ than liposomes encapsulating LLO. This StII immunostimulatory property further supports its use for the rational design of T cell vaccines against cancers and intracellular pathogens. In summary, this study indicates that StII has immunostimulatory properties similar to LLO, despite being evolutionarily distant PFPs.
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Affiliation(s)
- A Del Valle
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba
| | - N Acosta-Rivero
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba.
| | - R J Laborde
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba
| | - Y Cruz-Leal
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba
| | - S Cabezas
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba
| | - M C Luzardo
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba
| | - C Alvarez
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba
| | - M Labrada
- Center of Molecular Immunology (CIM), Playa, La Habana, Cuba
| | - A Rodríguez
- Center of Molecular Immunology (CIM), Playa, La Habana, Cuba
| | - G L Rodríguez
- Center of Molecular Immunology (CIM), Playa, La Habana, Cuba
| | - J Raymond
- Center of Molecular Immunology (CIM), Playa, La Habana, Cuba
| | | | - D Grubaugh
- Harvard Medical School, Harvard University, USA
| | - L E Fernández
- Center of Molecular Immunology (CIM), Playa, La Habana, Cuba
| | - D Higgins
- Harvard Medical School, Harvard University, USA
| | - M E Lanio
- Center for Protein Studies, Faculty of Biology, Havana University (UH) and Lab UH-CIM, Cuba.
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Raymond J, Naggara O, Guilbert F, Darsaut TE. Douglas Altman's 2009 Grand Lecture: Can we trust our literature? Neurochirurgie 2021; 68:202-205. [PMID: 34186030 DOI: 10.1016/j.neuchi.2021.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 06/19/2021] [Indexed: 11/18/2022]
Abstract
Recent studies of the medical literature have revealed numerous and serious problems. Errors in the design, methods and interpretation of studies can frequently be identified. A huge hidden problem is publication bias, the tendency for positive articles to be published, while negative articles are either not written or submitted. This can systematically lead to an overestimation of the value of treatments, of diagnostic or prognostic studies. Even more worrisome is selective reporting: only a subset of a wide array of tested hypotheses are presented (the ones that turned out to be positive with significance testing). This is particularly true for secondary endpoints and subgroup findings, but even the primary endpoints of trials have been modified when publications are compared to protocols. The peer-review process is fallible. Even if it were strengthened, reviewers cannot examine what is not reported. Hence many problems can only be mitigated with better reporting. Numerous initiatives have proposed guidelines to promote transparent reporting, but progress is slow.
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Affiliation(s)
- J Raymond
- Department of Radiology, Neuroradiology service, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - O Naggara
- Department of Neuroradiology, Université Paris-Descartes, INSERM UMR 894, Centre hospitalier Sainte-Anne, Paris, Ile de France, France
| | - F Guilbert
- Department of Radiology, Neuroradiology service, Centre hospitalier de l'Université de Montréal (CHUM), Montreal, Quebec, Canada
| | - T E Darsaut
- Division of Neurosurgery, Department of Surgery, University of Alberta hospital, Mackenzie Health Sciences Centre, 8440 112St NW, Edmonton, Alberta, Canada
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Raymond J, Darsaut TE. We need less research, better research, and research done for the right reasons. Neurochirurgie 2021; 67:413. [PMID: 34311988 DOI: 10.1016/j.neuchi.2021.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- J Raymond
- Department of radiology, service of neuroradiology, centre hospitalier de l'université de Montréal (CHUM), Montreal, Quebec, Canada.
| | - T E Darsaut
- Division of neurosurgery, department of surgery, Mackenzie health sciences centre, university of Alberta hospital, 8440 112St NW, Edmonton, Alberta, Canada
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Findler M, Turjman AS, Raymond J, White PM, Sadeh-Gonik U, Taschner CA, Mazighi M, Biondi A, Gory B, Turjman F. Interobserver Agreement in Scoring Angiographic Results of Basilar Artery Occlusion Stroke Therapy. AJNR Am J Neuroradiol 2021; 42:1458-1463. [PMID: 34117020 DOI: 10.3174/ajnr.a7182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/09/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The modified TICI Infarction grading system is a metric currently used to evaluate angiographic results of thrombectomy for large-vessel occlusion in ischemic stroke. Originally designed for evaluating MCA territories, it is currently used for other vessel occlusions, including the posterior circulation. We postulate that the modified TICI use for the posterior circulation is not accurate due to the different vascular territories supplied by vertebrobasilar vasculature, making grading more complex. MATERIALS AND METHODS We collected angiographic results from 30 patients who presented with acute posterior circulation occlusions between 2015 and 2018 and underwent thrombectomy in our institution. Eight observers were asked to evaluate the TICI scores before and after thrombectomy. The multirater statistics were computed using Fleiss κ analysis. Further data were collected regarding the potential brain territories at risk and the existence of atherosclerotic disease in the basilar artery. RESULTS The overall agreement κ reached 0.277 (SD, 0.013), which suggests a "fair" agreement among the raters. On average, 45% of observers achieved a high accuracy in predicting brain areas at risk of ischemia. As for the existence of basilar atherosclerotic disease, a high agreement (defined as at least 5 of 6 observers) was seen in 20 of the 30 patients. CONCLUSIONS Despite TICI being ubiquitous in stroke diagnostics, the high variability of posterior circulation TICI scores calls into question its use in these strokes. Other methods should be developed to assess recanalization in the posterior circulation.
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Affiliation(s)
- M Findler
- Department of Neurology and Interventional Neuroradiology (M.F.), Rabin Medical Center, Petah Tikva, Israel
| | - A S Turjman
- Cognition Medical Corporation (Alexis S. Turjman), Boston, Massachusetts
| | - J Raymond
- Département de Radiologie, Radio-Oncologie et Médecine Nucléaire (J.R.), Université de Montréal, Montreal, Quebec, Canada
| | - P M White
- Department of Neuroradiology (P.M.W.), Royal Victoria Infirmary, Newcastle, UK
| | - U Sadeh-Gonik
- Department of Radiology and Interventional Neuroradiology (U.S.-G.), Tel Aviv Medical Center, Tel-Aviv, Israel
| | - C A Taschner
- Department of Neuroradiology (C.A.T.), University Medical Centre Freiburg, Freiburg, Germany
| | - M Mazighi
- Department of Interventional Neuroradiology (M.M.), Fondation Rothschild Hospital, Paris, France
| | - A Biondi
- Department of Neuroradiology and Endovascular Therapy (A.B.), Besancon University Hospital, Besancon, France
| | - B Gory
- Department of Diagnostic and Therapeutic Neuroradiology (B.G.), Centre Hospitalier Régional Universitaire Nancy, Nancy, France
| | - F Turjman
- Department of Interventional Neuroradiology (Francis Turjman), Hospices Civils de Lyon, Lyon,France
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Darsaut TE, Fahed R, Raymond J. Unruptured aneurysms: Why observational studies fall short no matter how "Big" the Data. Neurochirurgie 2021; 67:330-335. [PMID: 33713661 DOI: 10.1016/j.neuchi.2021.02.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/09/2020] [Accepted: 02/28/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND The best management of unruptured intracranial aneurysms (UIAs) remains unknown, despite multiple observational studies. A randomized trial (RCT) is in order. Yet, a National Institute Neurological Disorders and Stroke workshop has once again proposed to use prospective observational studies (POS) of large databases to address such problems. METHODS We review the historical misconceptions that have been associated with observations of UIAs and their treatments. We critically examine some recent methods that have been proposed to address shortcomings of observational studies. We finally review the ethical principles underlying the use of trial methods in the care of patients. RESULTS Replacing RCTs with POS submits patients to management options that have never been proven beneficial, while making them involuntary research subjects of studies that are inevitably biased. A science of practice cannot be an outsider's examination of the behavior of clinicians incapable of questioning their practice. The thesis we propose is that a science of practice must not only eventually determine what best practice will be; It must engage agents involved in medical practice to transparently reveal the uncertainty that calls for management options to be offered under the guidance of declared and controlled care research, to optimize patient outcomes in spite of the uncertainty. CONCLUSION To use POS rather than RCTs in medical practice is to renege on scientific and ethical principles that characterize modern medicine. Instead, we must learn to integrate care research into our practice to provide optimal medical care in real time.
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Affiliation(s)
- T E Darsaut
- Division of Neurosurgery, Department of Surgery, Mackenzie Health Sciences Center, University of Alberta hospital, 8440 112th Street, Edmonton, T6G 2B7 Alberta, Canada.
| | - R Fahed
- Division of Neurology, Department of Medicine, The Ottawa Hospital-Civic Campus, 1053, Carling Avenue, K1Y 4E9 Ottawa, Ontario, Canada.
| | - J Raymond
- Service of Neuroradiology, Department of Radiology, Centre Hospitalier de l'Université de Montréal, 1000, Saint-Denis, D03.5462B, H2X 0C1 Montreal, Quebec, Canada.
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