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Radu RA, Costalat V, Romoli M, Musmar B, Siegler JE, Ghozy S, Khalife J, Salim H, Shaikh H, Adeeb N, Cuellar-Saenz HH, Thomas AJ, Kadirvel R, Abdalkader M, Klein P, Nguyen TN, Heit JJ, Regenhardt RW, Bernstock JD, Patel AB, Rabinov JD, Stapleton CJ, Cancelliere NM, Marotta TR, Mendes Pereira V, El Naamani K, Amllay A, Tjoumakaris SI, Jabbour P, Meyer L, Fiehler J, Faizy TD, Guerreiro H, Dusart A, Bellante F, Forestier G, Rouchaud A, Mounayer C, Kühn AL, Puri AS, Dyzmann C, Kan PT, Colasurdo M, Marnat G, Berge J, Barreau X, Sibon I, Nedelcu S, Henninger N, Ota T, Dofuku S, Yeo LLL, Tan BY, Gopinathan A, Martinez-Gutierrez JC, Salazar-Marioni S, Sheth S, Renieri L, Capirossi C, Mowla A, Chervak LM, Vagal A, Khandelwal P, Biswas A, Clarençon F, Elhorany M, Premat K, Valente I, Pedicelli A, Alexandre AM, Filipe JP, Varela R, Quintero-Consuegra M, Gonzalez NR, Ymd MA, Jesser J, Weyland C, Ter Schiphorst A, Yedavalli V, Harker P, Aziz Y, Gory B, Paul Stracke C, Hecker C, Killer-Oberpfalzer M, Griessenauer CJ, Hsieh CY, Liebeskind DS, Tancredi I, Fahed R, Lubicz B, Essibayi MA, Baker A, Altschul D, Scarcia L, Kalsoum E, Dmytriw AA, Guenego A. Outcomes with General Anesthesia Compared to Conscious Sedation for Endovascular Treatment of Medium Vessel Occlusions: Results of an International Multicentric Study. Clin Neuroradiol 2024:10.1007/s00062-024-01415-1. [PMID: 38687365 DOI: 10.1007/s00062-024-01415-1] [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: 02/24/2024] [Accepted: 04/14/2024] [Indexed: 05/02/2024]
Abstract
BACKGROUND Optimal anesthetic strategy for the endovascular treatment of stroke is still under debate. Despite scarce data concerning anesthetic management for medium and distal vessel occlusions (MeVOs) some centers empirically support a general anesthesia (GA) strategy in these patients. METHODS We conducted an international retrospective study of MeVO cases. A propensity score matching algorithm was used to mitigate potential differences across patients undergoing GA and conscious sedation (CS). Comparisons in clinical and safety outcomes were performed between the two study groups GA and CS. The favourable outcome was defined as a modified Rankin Scale (mRS) 0-2 at 90 days. Safety outcomes were 90-days mortality and symptomatic intracranial hemorrhage (sICH). Predictors of a favourable outcome and sICH were evaluated with backward logistic regression. RESULTS After propensity score matching 668 patients were included in the CS and 264 patients in the GA group. In the matched cohort, either strategy CS or GA resulted in similar rates of good functional outcomes (50.1% vs. 48.4%), and successful recanalization (89.4% vs. 90.2%). The GA group had higher rates of 90-day mortality (22.6% vs. 16.5%, p < 0.041) and sICH (4.2% vs. 0.9%, p = 0.001) compared to the CS group. Backward logistic regression did not identify GA vs CS as a predictor of good functional outcome (OR for GA vs CS = 0.95 (0.67-1.35)), but GA remained a significant predictor of sICH (OR = 5.32, 95% CI 1.92-14.72). CONCLUSION Anaesthetic strategy in MeVOs does not influence favorable outcomes or final successful recanalization rates, however, GA may be associated with an increased risk of sICH and mortality.
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Affiliation(s)
- Răzvan Alexandru Radu
- Department of Neuroradiology, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France.
- Department of Clinical Neurosciences, "Carol Davila" University of Medicine and Pharmacy, Bucharest, Romania.
| | - Vincent Costalat
- Department of Neuroradiology, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
| | - Michele Romoli
- Neurology and Stroke Unit, Bufalini Hospital, AUSL Romagna, Cesena, Italy
| | - Basel Musmar
- Department of Neurosurgery and Interventional Neuroradiology, Louisiana State University, Louisiana, LA, USA
| | - James E Siegler
- Cooper Neurological Institute, Cooper University Hospital, Cooper Medical School of Rowen University, Camden, NJ, USA
| | - Sherief Ghozy
- Departments of Neurological Surgery & Radiology, Mayo Clinic, Rochester, MN, USA
| | - Jane Khalife
- Cooper Neurological Institute, Cooper University Hospital, Cooper Medical School of Rowen University, Camden, NJ, USA
| | - Hamza Salim
- Department of Neurosurgery and Interventional Neuroradiology, Louisiana State University, Louisiana, LA, USA
| | - Hamza Shaikh
- Cooper Neurological Institute, Cooper University Hospital, Cooper Medical School of Rowen University, Camden, NJ, USA
| | - Nimer Adeeb
- Department of Neurosurgery and Interventional Neuroradiology, Louisiana State University, Louisiana, LA, USA
| | - Hugo H Cuellar-Saenz
- Department of Neurosurgery and Interventional Neuroradiology, Louisiana State University, Louisiana, LA, USA
| | - Ajith J Thomas
- Cooper Neurological Institute, Cooper University Hospital, Cooper Medical School of Rowen University, Camden, NJ, USA
| | - Ramanathan Kadirvel
- Departments of Neurological Surgery & Radiology, Mayo Clinic, Rochester, MN, USA
| | - Mohamad Abdalkader
- Departments of Radiology & Neurology, Boston Medical Center, Boston, MA, USA
| | - Piers Klein
- Departments of Radiology & Neurology, Boston Medical Center, Boston, MA, USA
| | - Thanh N Nguyen
- Departments of Radiology & Neurology, Boston Medical Center, Boston, MA, USA
| | - Jeremy J Heit
- Department of Interventional Neuroradiology, Stanford Medical Center, Palo Alto, CA, USA
| | - Robert W Regenhardt
- Neuroendovascular Program, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Joshua D Bernstock
- Neuroendovascular Program, Massachusetts General Hospital, Harvard University, Boston, MA, USA
- Department of Neurosurgery, Brigham and Women's Hospital, Boston, MA, USA
| | - Aman B Patel
- Neuroendovascular Program, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - James D Rabinov
- Neuroendovascular Program, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Christopher J Stapleton
- Neuroendovascular Program, Massachusetts General Hospital, Harvard University, Boston, MA, USA
| | - Nicole M Cancelliere
- Neurovascular Centre, Departments of Medical Imaging and Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada
| | - Thomas R Marotta
- Neurovascular Centre, Departments of Medical Imaging and Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada
| | - Vitor Mendes Pereira
- Neurovascular Centre, Departments of Medical Imaging and Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada
| | - Kareem El Naamani
- Department of Neurosurgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Abdelaziz Amllay
- Department of Neurosurgery, Thomas Jefferson University, Philadelphia, PA, USA
| | | | - Pascal Jabbour
- Department of Neurosurgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Lukas Meyer
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Tobias D Faizy
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Radiology, Interventional Neuroradiology Section, University Medical Center Münster, Munster, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anne Dusart
- Department of Neurology, Hôpital Civil Marie Curie, Charleroi, Belgium
| | - Flavio Bellante
- Department of Neurology, Hôpital Civil Marie Curie, Charleroi, Belgium
| | - Géraud Forestier
- University Hospital of Limoges, Neuroradiology Department, Dupuytren, Université de Limoges, XLIM CNRS, UMR 7252, Limoges, France
| | - Aymeric Rouchaud
- University Hospital of Limoges, Neuroradiology Department, Dupuytren, Université de Limoges, XLIM CNRS, UMR 7252, Limoges, France
| | - Charbel Mounayer
- University Hospital of Limoges, Neuroradiology Department, Dupuytren, Université de Limoges, XLIM CNRS, UMR 7252, Limoges, France
| | - Anna Luisa Kühn
- Division of Neurointerventional Radiology, Department of Radiology, University of Massachusetts Medical Center, Worcester, MA, USA
| | - Ajit S Puri
- Division of Neurointerventional Radiology, Department of Radiology, University of Massachusetts Medical Center, Worcester, MA, USA
| | - Christian Dyzmann
- Neuroradiology Department, Sana Kliniken, Lübeck GmbH, Lübeck, Germany
| | - Peter T Kan
- Department of Neurosurgery, University of Texas Medical Branch, Galveston, TX, USA
| | - Marco Colasurdo
- Department of Neurosurgery, University of Texas Medical Branch, Galveston, TX, USA
- Department of Interventional Radiology, Oregon Health and Science University, 97239, Portland, OR, USA
| | - Gaultier Marnat
- Interventional Neuroradiology Department, Bordeaux University Hospital, Bordeaux, France
| | - Jérôme Berge
- Interventional Neuroradiology Department, Bordeaux University Hospital, Bordeaux, France
| | - Xavier Barreau
- Interventional Neuroradiology Department, Bordeaux University Hospital, Bordeaux, France
| | - Igor Sibon
- Neurology Department, Bordeaux University Hospital, Bordeaux, France
| | - Simona Nedelcu
- Department of Neurology, University of Massachusetts Chan Medical School, Worcester, MA, USA
| | - Nils Henninger
- Department of Neurology, University of Massachusetts Chan Medical School, Worcester, MA, USA
- Department of Psychiatry, University of Massachusetts Chan Medical School, Worcester, MA, USA
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Takahiro Ota
- Department of Neurosurgery, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
| | - Shogo Dofuku
- Department of Neurosurgery, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
| | - Leonard L L Yeo
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Benjamin Yq Tan
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Division of Neurology, Department of Medicine, National University Hospital, Singapore, Singapore
| | - Anil Gopinathan
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Division of Interventional Radiology, National University Hospital, Singapore, Singapore
| | | | | | - Sunil Sheth
- Department of Neurology, UTHealth McGovern Medical School, Houston, TX, USA
| | - Leonardo Renieri
- Interventistica Neurovascolare, Ospedale Careggi di Firenze, Florence, Italy
| | - Carolina Capirossi
- Interventistica Neurovascolare, Ospedale Careggi di Firenze, Florence, Italy
| | - Ashkan Mowla
- Division of Stroke and Endovascular Neurosurgery, Department of Neurological Surgery, Keck School of Medicine, University of Southern California (USC), North State St, Suite 3300, 1200, Los Angeles, CA, USA
| | - Lina M Chervak
- Department of Neurology and Radiology, University of Cincinnati, Cincinnati, USA
| | - Achala Vagal
- Department of Neurology and Radiology, University of Cincinnati, Cincinnati, USA
| | - Priyank Khandelwal
- Department of Endovascular Neurosurgery and Neuroradiology NJMS, Newark, NJ, USA
| | - Arundhati Biswas
- Department of Neurosurgery, Westchester Medical Center at New York Medical College, Valhalla, NY, USA
| | - Frédéric Clarençon
- Department of Neuroradiology, Pitié-Salpêtrière Hospital, Paris, France
- Division of Interventional Radiology, National University Hospital, Singapore, Singapore
| | - Mahmoud Elhorany
- Department of Neuroradiology, Pitié-Salpêtrière Hospital, Paris, France
- Neurology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
- Division of Interventional Radiology, National University Hospital, Singapore, Singapore
| | - Kevin Premat
- Department of Neuroradiology, Pitié-Salpêtrière Hospital, Paris, France
- Division of Interventional Radiology, National University Hospital, Singapore, Singapore
| | - Iacopo Valente
- UOSA Neuroradiologia Interventistica, Fondazione Policlinico Universitario A.Gemelli IRCCS Roma, Rome, Italy
| | - Alessandro Pedicelli
- UOSA Neuroradiologia Interventistica, Fondazione Policlinico Universitario A.Gemelli IRCCS Roma, Rome, Italy
| | - Andrea M Alexandre
- UOSA Neuroradiologia Interventistica, Fondazione Policlinico Universitario A.Gemelli IRCCS Roma, Rome, Italy
| | - João Pedro Filipe
- Department of Diagnostic and Interventional Neuroradiology, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - Ricardo Varela
- Department of Neurology, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | | | - Nestor R Gonzalez
- Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, USA
| | - Markus A Ymd
- Sektion Vaskuläre und Interventionelle Neuroradiologie, Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - Jessica Jesser
- Sektion Vaskuläre und Interventionelle Neuroradiologie, Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - Charlotte Weyland
- Sektion Vaskuläre und Interventionelle Neuroradiologie, Universitätsklinikum Heidelberg, Heidelberg, Germany
| | - Adrien Ter Schiphorst
- Department of Neurology, Gui de Chauliac Hospital, Montpellier University Medical Center, Montpellier, France
| | - Vivek Yedavalli
- Department of Radiology, Division of Neuroradiology, Johns Hopkins Medical Center, Baltimore, MD, USA
| | - Pablo Harker
- Department of Neurology, University of Cincinnati Medical Center, Cincinnati, OH, USA
| | - Yasmin Aziz
- Department of Neurology, University of Cincinnati Medical Center, Cincinnati, OH, USA
| | - Benjamin Gory
- Department of Interventional Neuroradiology, Nancy University Hospital, Nancy, France
- INSERM U1254, IADI, Université de Lorraine, 54511, Vandoeuvre-les-Nancy, France
| | - Christian Paul Stracke
- Department of Radiology, Interventional Neuroradiology Section, University Medical Center Münster, Munster, Germany
| | - Constantin Hecker
- Departments of Neurology & Neurosurgery, Christian Doppler Clinic, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Monika Killer-Oberpfalzer
- Departments of Neurology & Neurosurgery, Christian Doppler Clinic, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Christoph J Griessenauer
- Departments of Neurology & Neurosurgery, Christian Doppler Clinic, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Cheng-Yang Hsieh
- Neurology Department, Sin-Lau Hospital, Tainan, Taiwan, Province of China
| | - David S Liebeskind
- UCLA Stroke Center and Department of Neurology Department, UCLA, Los Angeles, California, USA
| | - Illario Tancredi
- Department of Medicine, Division of Neurology, The Ottawa Hospital, Ottawa Hospital Research Institute and University of Ottawa, Ottawa, Ontario, Canada
| | - Robert Fahed
- Department of Medicine, Division of Neurology, The Ottawa Hospital, Ottawa Hospital Research Institute and University of Ottawa, Ottawa, Ontario, Canada
| | - Boris Lubicz
- Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium
| | - Muhammed Amir Essibayi
- Department of Neurological Surgery and Montefiore-Einstein Cerebrovascular Research Lab, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Amanda Baker
- Department of Neurological Surgery and Montefiore-Einstein Cerebrovascular Research Lab, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - David Altschul
- Department of Neurological Surgery and Montefiore-Einstein Cerebrovascular Research Lab, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Luca Scarcia
- Department of Neuroradiology, Henri Mondor Hospital, Creteil, France
| | - Erwah Kalsoum
- Department of Neuroradiology, Henri Mondor Hospital, Creteil, France
| | - Adam A Dmytriw
- Neuroendovascular Program, Massachusetts General Hospital, Harvard University, Boston, MA, USA
- Neurovascular Centre, Departments of Medical Imaging and Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada
| | - Adrien Guenego
- Department of Diagnostic and Interventional Neuroradiology, Erasme University Hospital, Brussels, Belgium
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Guerreiro H, Flottmann FA, Kyselyova AA, Wagner M, Brekenfeld C, Eckert B, Illies T, Wodarg F, Fiehler J, Bester M. First experience with Walrus balloon guide catheter in a whole-body flow model. Neuroradiology 2023; 65:1787-1792. [PMID: 37640884 PMCID: PMC10654250 DOI: 10.1007/s00234-023-03214-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 08/12/2023] [Indexed: 08/31/2023]
Abstract
PURPOSE Flow arrest using a balloon guide catheter (BGC) in mechanical thrombectomy (MT) due to large vessel occlusion has been associated with better outcomes. Known limitations of currently commercially available BGCs are incompatibility with large bore aspiration catheters (AC) and lack of distal flexibility. Walrus presents variable stiffness and compatibility with large bore AC. The goal of this study is to describe the first experience with Walrus in a realistic stroke simulation model. METHODS A full-length modular vascular model under physiological conditions was used. 8F+-Walrus inner-diameter (ID) 0.087in 95 cm combined with 6F-Sofia AC ID 0.070in 131 cm and an 8F-Flowgate2 BGC ID 0.084in 95 cm with a 5F-Sofia AC ID 0.055in 125 cm were used to perform aspiration MT. User surveys, access to target and occlusion site, technique, time of delivery, anatomical change, and catheter kick-back were assessed. RESULTS Seven neuroradiologists with average of 10 years-experience in MT performed primary aspiration using the above-mentioned combinations in three different anatomies (N = 41). All operators would likely (29%) or very likely (71%) use again Walrus in combination with large bore AC and the majority (86%) found its navigability easier than with other BGCs. Time to reach final BGC position and catheter kick-back did not differ significantly among anatomies or catheter combinations (p > 0.05). However, Walrus was more likely to reach ICA petrous segment (p < 0.05) and intracranial occlusion with AC (p < 0.01). CONCLUSION The Walrus combined with large bore AC presented significantly better distal access and navigability for primary aspiration in an in vitro stroke model.
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Affiliation(s)
- Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany.
| | - Fabian A Flottmann
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - Anna A Kyselyova
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - Maximilian Wagner
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - Caspar Brekenfeld
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - Bernd Eckert
- Department of Radiology and Neuroradiology, Asklepios Klinik Altona, Hamburg, Germany
| | - Till Illies
- Department of Radiology and Neuroradiology, Asklepios Klinik Altona, Hamburg, Germany
| | - Fritz Wodarg
- Department of Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
| | - Maxim Bester
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20251, Hamburg, Germany
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Kniep H, Meyer L, Broocks G, Bechstein M, Guerreiro H, Winkelmeier L, Brekenfeld C, Flottmann F, Deb-Chatterji M, Alegiani A, Hanning U, Thomalla G, Fiehler J, Gellißen S. Predictors of functional outcome after thrombectomy for M2 occlusions: a large scale experience from clinical practice. Sci Rep 2023; 13:18740. [PMID: 37907482 PMCID: PMC10618211 DOI: 10.1038/s41598-023-45232-x] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Accepted: 10/17/2023] [Indexed: 11/02/2023] Open
Abstract
Mechanical thrombectomy (MT) for acute ischemic stroke with medium vessel occlusions is still a matter of debate. We sought to identify factors associated with clinical outcome after MT for M2-occlusions based on data from the German Stroke Registry-Endovascular Treatment (GSR-ET). All patients prospectively enrolled in the GSR-ET from 05/2015 to 12/2021 were analyzed (NCT03356392). Inclusion criteria were primary M2-occlusions and availability of relevant clinical data. Factors associated with excellent/good outcome (modified Rankin scale mRS 0-1/0-2), poor outcome/death (mRS 5-6) and mRS-increase pre-stroke to day 90 were determined in multivariable logistic regression. 1348 patients were included. 1128(84%) had successful recanalization, 595(44%) achieved good outcome, 402 (30%) had poor outcome. Successful recanalization (odds ratio [OR] 4.27 [95% confidence interval 3.12-5.91], p < 0.001), higher Alberta stroke program early CT score (OR 1.25 [1.18-1.32], p < 0.001) and i.v. thrombolysis (OR 1.28 [1.07-1.54], p < 0.01) increased probability of good outcome, while age (OR 0.95 [0.94-0.95], p < 0.001), higher pre-stroke-mRS (OR 0.36 [0.31-0.40], p < 0.001), higher baseline NIHSS (OR 0.89 [0.88-0.91], p < 0.001), diabetes (OR 0.52 [0.42-0.64], p < 0.001), higher number of passes (OR 0.75 [0.70-0.80], p < 0.001) and intracranial hemorrhage (OR 0.26 [0.14-0.46], p < 0.001) decreased the probability of good outcome. Additional predictors of mRS-increase pre-stroke to 90d were dissections, perforations (OR 1.59 [1.11-2.29], p < 0.05) and clot migration, embolization (OR 1.67 [1.21-2.30], p < 0.01). Corresponding to large-vessel-occlusions, younger age, low pre-stroke-mRS, low severity of acute clinical disability, i.v. thrombolysis and successful recanalization were associated with good outcome while diabetes and higher number of passes decreased probability of good outcome after MT in M2 occlusions. Treatment related complications increased probability of mRS increase pre-stroke to 90d.
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Affiliation(s)
- Helge Kniep
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
| | - Lukas Meyer
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Gabriel Broocks
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Matthias Bechstein
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Laurens Winkelmeier
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Caspar Brekenfeld
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Fabian Flottmann
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Milani Deb-Chatterji
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anna Alegiani
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Neurology, Asklepios Klinik Altona, Hamburg, Germany
| | - Uta Hanning
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Götz Thomalla
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Susanne Gellißen
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
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Kyselyova AA, Frölich AM, Bester M, Brekenfeld C, Buhk JH, Ding A, Nagl F, Jost TJ, Guerreiro H, Ngo NT, Fiehler J, Flottmann F. Evaluation of intracranial stenting in a simulated training and assessment environment for neuroendovascular procedures. Front Neurol 2023; 14:1247421. [PMID: 37727579 PMCID: PMC10506405 DOI: 10.3389/fneur.2023.1247421] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/24/2023] [Indexed: 09/21/2023] Open
Abstract
Purpose Given the inherent complexity of neurointerventional procedures and the associated risks of ionizing radiation exposure, it is crucial to prioritize ongoing training and improve safety protocols. The aim of this study is to assess a training and evaluation in-vitro environment using a vascular model of M1 stenosis, within a clinical angiography suite, without relying on animal models or X-ray radiation. Materials and methods Using a transparent model replicating M1 stenosis, we conducted intracranial stenting procedures with four different setups (Gateway & Wingspan, Gateway & Enterprise, Neurospeed & Acclino, and Pharos Vitesse). A video camera was integrated with the angiography system's monitor for real-time visualization, while a foot switch was employed to simulate live fluoroscopy. Three neuroradiologists with varying levels of expertise performed each procedure for three times. The total duration of fluoroscopy as well as the time from passing the stenosis with the wire to completion of the procedure were recorded using a dedicated software designed for this experimental setup. Results Compared to the Gateway & Wingspan procedure, the total fluoroscopy time reduced significantly with the Gateway & Enterprise, Neurospeed & Acclino, and Pharos Vitesse procedures by 51.56 s, 111.33 s, and 144.89 s, respectively (p < 0.001). Additionally, physicians with under 2 years and over 5 years of experience reduced FT by 62.83 s and 106.42 s, respectively, (p < 0.001), compared to a novice physician. Similar trends were noted for the time of wire distal to stenosis, with significant reductions for Neurospeed & Acclino and Pharos Vitesse compared to both Gateway & Wingspan as well as Gateway & Enterprise (all p < 0.001). Conclusion Procedures requiring wire exchange maneuvers exhibited nearly twice the fluoroscopy time in comparison to balloon-mounted stenting or stent-placement via PTA balloon catheters. The more experienced neuroradiologist demonstrated significantly quicker performance in line with expectations in a real-life clinical setting, when compared to the less experienced interventionalist. This in-vitro setup allowed the evaluation of alternative technical approaches and differences in experience of operators without the use of animal models or X-ray. The setup combines advantages of simulators and silicone vessel models in a realistic working environment.
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Affiliation(s)
- Anna A. Kyselyova
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas M. Frölich
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maxim Bester
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Caspar Brekenfeld
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan-Hendrik Buhk
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Neuroradiology, Asklepios Hospitals St. Georg and Wandsbek, Hamburg, Germany
| | - Andreas Ding
- Acandis, Acandis GmbH & Co. KG, Pforzheim, Germany
| | - Frank Nagl
- Acandis, Acandis GmbH & Co. KG, Pforzheim, Germany
| | | | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ngoc Tuan Ngo
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Fabian Flottmann
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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5
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Guerreiro H, Schröder H, Huber G, Busch F, Sellenschloh K, Adam G, Ittrich H, Busch JD. Quantification of mechanical properties in long-term in vivo used silicone catheter lines according to DIN 10555-3. Clin Biomech (Bristol, Avon) 2023; 107:106015. [PMID: 37321163 DOI: 10.1016/j.clinbiomech.2023.106015] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/21/2023] [Accepted: 05/23/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND Totally implantable central venous access port devices are crucial for intravenous application of chemotherapeutics and long-term therapy for chronic disease. Common complications include thrombosis and device fracture related to altered material properties through exposure in situ. This study exhibits whether uniaxial tensile properties (DIN 10555-3) of in vivo used catheters prove inferior to unused catheters. MATERIAL AND METHODS 5 unused, originally packed silicone catheters were cut into 6 segments of 50 mm: 3 segments each were cleaned via cleaning solution (n = 15) while 3 segments were left unattended (n = 15). Distal segments (50 mm) of long-term in vivo used silicone catheters were cleaned before testing (n = 33). Overall mechanical behavior was tested in a custom-made self-centering, torsion free carrier. Maximum force stress at failure, strain at failure and Young's modulus were determined and statistically analyzed. FINDINGS Unused catheters showed no significant difference in testing. in vivo used catheters exhibited 20% lower maximal force than unused catheters (p < 0.001), strain at break (p 〈0,001), and 7% higher elastic modulus (p = 0.004; power: 0.845). Due to a constant cross section area, stress at failure was proportional to maximum force (p < 0.001). Relation between determined parameters and dwell times was non-significant. INTERPRETATION In vivo long-term used silicone catheters showed significantly lower ultimate strength than unused ones. It is likely that in situ altering changes the mechanical properties of catheters and may potentially lead to failure.
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Affiliation(s)
- H Guerreiro
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
| | - H Schröder
- Institute of Biomechanics TUHH Hamburg University of Technology, Hamburg, Germany
| | - G Huber
- Institute of Biomechanics TUHH Hamburg University of Technology, Hamburg, Germany
| | - F Busch
- Division of Neonatology, Department of Pediatrics Bern University Hospital, University of Bern, Switzerland
| | - K Sellenschloh
- Institute of Biomechanics TUHH Hamburg University of Technology, Hamburg, Germany
| | - G Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - H Ittrich
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - J D Busch
- Department of Diagnostic, Interventional Radiology and Pediatrics Bern University Hospital, University of Bern, Switzerland
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6
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Hanning U, Bechstein M, Kaesmacher J, Boulouis G, Chapot R, Andersson T, Boccardi E, Psychogios M, Cognard C, de Dios Lascuevas M, Rodrigues M, Rodriguez Caamaño I, Gargalas S, Simonato D, Zupancic V, Daller C, Meyer L, Broocks G, Guerreiro H, Fiehler J, Martínez-Galdamez M, Kalousek V. Remote Training of Neurointerventions by Audiovisual Streaming : Experiences from the European ESMINT-EYMINT E-Fellowship Program. Clin Neuroradiol 2023; 33:137-145. [PMID: 35829740 PMCID: PMC9277595 DOI: 10.1007/s00062-022-01192-9] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/20/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Remote access of trainees to training centers via video streaming (tele-observership, e‑fellowship) emerges as an alternative to acquire knowledge in endovascular interventions. Situational awareness is a summary term that is also used in surgical procedures for perceiving and understanding the situation and projecting what will happen next. A high situational awareness would serve as prerequisite for meaningful learning success during tele-observerships. We hypothesized that live perception of the angiographical procedures using streaming technology is feasible and sufficient to gain useful situational awareness of the procedure. METHODS During a European tele-observership organized by the European Society of Minimally Invasive Neurological Therapy (ESMINT) and its trainee association (EYMINT), a total of six neurointerventional fellows in five countries observed live cases performed by experienced neurointerventionalists (mentors) in six different high-volume neurovascular centers across Europe equipped with live-streaming technology (Tegus Medical, Hamburg, Germany). Cases were prospectively evaluated during a 12-month period, followed by a final questionnaire after completion of the course. RESULTS A total of 102/161 (63%) cases with a 1:1 allocation of fellow and mentor were evaluated during a 12-month period. Most frequent conditions were ischemic stroke (27.5%), followed by embolization of unruptured aneurysms (25.5%) and arteriovenous malformations (AVMs) (15.7%). A high level of situational awareness was reported by fellows in 75.5% of all cases. After finishing the program, the general improvement of neurointerventional knowledge was evaluated to be extensive (1/6 fellows), substantial (3/6), and moderate (2/6). The specific fields of improvement were procedural knowledge (6/6 fellows), technical knowledge (3/6) and complication management (2/6). CONCLUSION Online streaming technology facilitates location-independent training of complex neurointerventional procedures through high levels of situational awareness and can therefore supplement live hands-on-training. In addition, it leads to a training effect for fellows with a perceived improvement of their neurointerventional knowledge.
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Affiliation(s)
- Uta Hanning
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
| | - Matthias Bechstein
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Johannes Kaesmacher
- Department of Neurology, Institute of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, Bern, Switzerland
| | - Grégoire Boulouis
- Diagnostic and Interventional Neuroradiology Department, Institut national de la santé et de la recherche médicale (INSERM) Team 1253 iBrain, Tours University Hospital, Tours, Centre Val de Loire Region, France
| | - René Chapot
- Department of Neuroradiology, Alfried Krupp Krankenhaus, Essen, Germany
| | - Tommy Andersson
- Department of Neuroradiology, Karolinska University Hospital and Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden.,Department of Medical Imaging, AZ Groeninge, Kortrijk, Belgium
| | - Edoardo Boccardi
- Department of Diagnostic and Interventional Neuroradiology, Niguarda Hospital, Milan, Italy
| | - Marios Psychogios
- Division of Neuroradiology, Clinic of Radiology and Nuclear Medicine, Basel University Hospital, Basel, Switzerland
| | - Christophe Cognard
- Neuroradiology Department, Pierre-Paul-Riquet/Purpan University Hospital, Toulouse, France
| | | | - Marta Rodrigues
- Neuroradiology Department, Centro Hospitalar de Vila Nova de Gaia/Espinho, Vila Nova de Gaia, Portugal
| | | | - Sergios Gargalas
- Diagnostic and Interventional Neuroradiology Department, John Radcliffe Hospital, Oxford, UK
| | - Davide Simonato
- Interventional Neuroradiology Department, University Hospital of Padua, Padua, Italy
| | - Vedran Zupancic
- Department of Radiology, Clinical Hospital Center Sestre Milosrdnice, Zagreb, Croatia
| | - Cornelia Daller
- Department of Neurosurgery, Paracelsus Medical University Salzburg, Salzburg, Austria
| | - Lukas Meyer
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Gabriel Broocks
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Mario Martínez-Galdamez
- Interventional Neuroradiology/Endovascular Neurosurgery, Hospital Clínico Universitario de Valladolid, Valladolid, Spain
| | - Vladimir Kalousek
- Department of Radiology, Clinical Hospital Center Sestre Milosrdnice, Zagreb, Croatia
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Fluschnik N, Tahir E, Erley J, Müllerleile K, Metzner A, Wenzel JP, Guerreiro H, Adam G, Blankenberg S, Kirchhof P, Tönnis T, Nikorowitsch J. 3 Tesla magnetic resonance imaging in patients with cardiac implantable electronic devices: a single centre experience. Europace 2022; 25:571-577. [PMID: 36413601 PMCID: PMC9935018 DOI: 10.1093/europace/euac213] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 11/01/2022] [Indexed: 11/23/2022] Open
Abstract
AIMS Three Tesla (T) magnetic resonance imaging (MRI) provides critical imaging information for many conditions. Owing to potential interactions of the magnetic field, it is largely withheld from patients with cardiac implantable electronic devices (CIEDs). Therefore, we assessed the safety of 3T MRI in patients with '3T MRI-conditional' and 'non-3T MRI-conditional' CIEDs. METHODS AND RESULTS We performed a retrospective single-centre analysis of clinically indicated 3T MRI examinations in patients with conventional pacemakers, cardiac resynchronization devices, and implanted defibrillators from April 2020 to May 2022. All CIEDs were interrogated and programmed before and after scanning. Adverse events included all-cause death, arrhythmias, loss of capture, inappropriate anti-tachycardia therapies, electrical reset, and lead or generator failure during or shortly after MRI. Changes in signal amplitude and lead impedance were systematically assessed. Statistics included median and interquartile range. A total of 132 MRI examinations were performed on a 3T scanner in 97 patients. Thirty-five examinations were performed in patients with 'non-3T MRI-conditional' CIEDs. Twenty-six scans were performed in pacemaker-dependent patients. No adverse events occurred during or shortly after MRI. P-wave or R-wave reductions ≥ 50 and ≥ 25%, respectively, were noted after three (2.3%) scans, all in patients with '3T MRI-conditional' CIEDs. Pacing and shock impedance changed by ± 30% in one case (0.7%). Battery voltage and stimulation thresholds did not relevantly change after MRI. CONCLUSION Pending verification in independent series, our data suggest that clinically indicated MRI scans at 3T field strength should not be withheld from patients with cardiac pacemakers or defibrillators.
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Affiliation(s)
- Nina Fluschnik
- Corresponding author. Phone: +49 (0) 40 7410 18576, Fax: +49 (0) 40 7410 58206, E-mail address:
| | - Enver Tahir
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistr 52, 20251 Hamburg, Germany
| | - Jennifer Erley
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistr 52, 20251 Hamburg, Germany
| | - Kai Müllerleile
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany
| | - Andreas Metzner
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany
| | - Jan-Per Wenzel
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany,German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Luebeck, Martinistr 52, 20251 Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Martinistr 52, 20251 Hamburg, Germany
| | - Stefan Blankenberg
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany,German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Luebeck, Martinistr 52, 20251 Hamburg, Germany
| | - Paulus Kirchhof
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany,German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Luebeck, Martinistr 52, 20251 Hamburg, Germany,Institute of Cardiovascular Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Tobias Tönnis
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany
| | - Julius Nikorowitsch
- Department of Cardiology, University Heart & Vascular Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20251 Hamburg, Germany,German Center for Cardiovascular Research (DZHK), Partner Site Hamburg/Kiel/Luebeck, Martinistr 52, 20251 Hamburg, Germany
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8
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Guerreiro H, Wortmann N, Andersek T, Ngo TN, Frölich AM, Krause D, Fiehler J, Kyselyova AA, Flottmann F. Novel synthetic clot analogs for in-vitro stroke modelling. PLoS One 2022; 17:e0274211. [PMID: 36083986 PMCID: PMC9462564 DOI: 10.1371/journal.pone.0274211] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 08/19/2022] [Indexed: 11/19/2022] Open
Abstract
Purpose
The increased demand for training of mechanical thrombectomy in ischemic stroke and development of new recanalization devices urges the creation of new simulation models both for training and device assessment. Clots properties have shown to play a role in procedural planning and thrombectomy device effectiveness. In this study, we analyzed the characteristics and applicability of completely synthetic, animal-free clots in the setting of an in-vitro model of mechanical thrombectomy for training and device assessment.
Methods
Synthetic clots based on agarose (n = 12) and silicone (n = 11) were evaluated in an in-vitro neurointervention simulation of mechanical thrombectomy with clot extraction devices. Calcified clots of mixed nature were simulated with addition of 3D printed structures. 9 clots were excluded due to insufficient vessel occlusion and failure to integrate with clot extraction device. Synthetic thrombi were characterized and compared using a categorical score-system on vessel occlusion, elasticity, fragmentation, adherence and device integration.
Results
Both agarose-based and silicone-based clots demonstrated relevant flow arrest and a good integration with the clot extraction device. Silicone-based clots scored higher on adherence to the vessel wall and elasticity.
Conclusion
Selected synthetic clots can successfully be implemented in an in-vitro training environment of mechanical thrombectomy. The clots’ different properties might serve to mimic fibrin-rich and red blood cell-rich human thrombi.
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Affiliation(s)
- Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- * E-mail:
| | - Nadine Wortmann
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, Hamburg, Germany
| | - Thomas Andersek
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, Hamburg, Germany
| | - Tuan N. Ngo
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas M. Frölich
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dieter Krause
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anna A. Kyselyova
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Fabian Flottmann
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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9
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Kniep H, Meyer L, Bechstein M, Broocks G, Guerreiro H, van Horn N, Brekenfeld C, Flottmann F, Deb-Chatterji M, Alegiani A, Thomalla G, Hanning U, Fiehler J, Gellißen S. How Much of the Thrombectomy Related Improvement in Functional Outcome Is Already Apparent at 24 Hours and at Hospital Discharge? Stroke 2022; 53:2828-2837. [PMID: 35549377 DOI: 10.1161/strokeaha.121.037888] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Early neurological status has been described as predictor of functional outcome in patients with anterior circulation stroke after mechanical thrombectomy. It remains unclear to what proportion the improvement of functional outcome at day 90 is already apparent at 24 hours and at hospital discharge and how later factors impact outcome. METHODS All patients enrolled in the German Stroke Registry (June 2015-December 2019) with anterior circulation stroke and availability of baseline data and neurological status were included. A mediation analysis was conducted to investigate the effect of successful recanalization (Thrombolysis in Cerebral Infarction scale score ≥2b) on good functional outcome (modified Rankin Scale score ≤2 at day 90) with mediation through neurological status (National Institutes of Health Stroke Scale [NIHSS] at 24 hours and at hospital discharge). RESULTS Three thousand fifty-seven patients fulfilled the inclusion criteria, thereof 2589 (85%) with successful recanalization and 1180 (39%) with good functional outcome. In a multivariate logistic regression analysis, probability of good outcome was significantly associated with age (odds ratio [95% CI], 0.95 [0.94-0.96]), prestroke modified Rankin Scale (0.48 [0.42-0.55]), admission-NIHSS (0.96 [0.94-0.98]), 24-hour NIHSS (0.83 [0.81-0.84]), diabetes (0.56 [0.43-0.72]), proximal middle cerebral artery occlusions (0.78 [0.62-0.97]), passes (0.88 [0.82-0.95]), Alberta Stroke Program Early CT Score (1.07 [1.00-1.14]), successful recanalization (2.39 [1.68-3.43]), intracerebral hemorrhage (0.51 [0.35-0.73]), and recurrent strokes (0.54 [0.32-0.92]). Mediation analysis showed a 20 percentage points (95% CI' 17-24 percentage points) increase of probability of good functional outcome after successful recanalization. Fifty-four percent (95% CI' 44%-66%) of the improvement in functional outcome was explained by 24-hour NIHSS and 75% (95% CI' 62%-90%) by NIHSS at hospital discharge. CONCLUSIONS Fifty-four percent of the improvement in functional outcome after successful recanalization is apparent in NIHSS at 24 hours, 75% in NIHSS at hospital discharge. Other unknown factors not apparent in NIHSS at the 2 time points investigated account for the remaining effect on long term outcome, suggesting, among others, clinical relevance of delayed neurological improvement and deterioration. REGISTRATION URL: https://www. CLINICALTRIALS gov; Unique identifier: NCT03356392.
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Affiliation(s)
- Helge Kniep
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Lukas Meyer
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Matthias Bechstein
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Gabriel Broocks
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Noel van Horn
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Caspar Brekenfeld
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Fabian Flottmann
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Milani Deb-Chatterji
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Germany. (M.D.-C., A.A., G.T.)
| | - Anna Alegiani
- Department of Neurology, Asklepios Klinik Altona, Hamburg, Germany (A.A)
| | - Götz Thomalla
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Germany. (M.D.-C., A.A., G.T.)
| | - Uta Hanning
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
| | - Susanne Gellißen
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Germany. (H.K., L.M., M.B., G.B., H.G., N.v.H., C.B., F.F., U.H., J.F., S.G.)
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Wortmann N, Andersek T, Guerreiro H, Kyselyova AA, Frölich AM, Fiehler J, Krause D. Development of synthetic thrombus models to simulate stroke treatment in a physical neurointerventional training model. All Life 2022. [DOI: 10.1080/26895293.2022.2046181] [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] Open
Affiliation(s)
- Nadine Wortmann
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, Hamburg, Germany
| | - Thomas Andersek
- WEINMANN Emergency Medical Technology GmbH + Co. KG, Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anna A. Kyselyova
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Dieter Krause
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, Hamburg, Germany
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11
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Lindner T, Guerreiro H, Austein F, Fiehler J. Individualized arterial spin labeling background suppression by rapid T1 mapping during acquisition. Eur Radiol 2022; 32:4521-4526. [PMID: 35118530 PMCID: PMC9213266 DOI: 10.1007/s00330-022-08550-8] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 11/29/2022]
Abstract
Objective Arterial spin labeling blood perfusion signal relies on the difference between a label and a control image. Background suppression pulses are commonly used to improve the contrast, yet these are based on estimates of tissue relaxation times. The aim of this study is to improve the perfusion contrast by individualizing the timing of these background suppression pulses by means of T1 mapping. Methods The optimized timing of the background suppression pulses is obtained by rapid T1 mapping employing the variable flip angle technique. Ten healthy volunteers were included in this study. To compare the results, visual grading and the Wilcoxon signed-rank test was used comparing three categories of image quality. Results The readers confirmed that the images of the proposed method generally show a higher signal-to-background ratio and cortical structures are better visible. Noise was mostly comparable to the standard method. Relative blood flow was statistically significant higher in the modified method. Conclusion The individually optimized background suppression pulses improve the image appearance and allow for a better visualization of cortical structures. The proposed technique however prolongs scan time, which can be seen as negative result, yet needs to be further evaluated. Key Points • Background suppression timing in ASL can vary. • Both the label and control condition can be modified for T1 mapping. • Adapting the pulse timing improves the signal-to-background ratio.
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Affiliation(s)
- T Lindner
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Hamburg-Eppendorf, Martinistr. 52, Gebauede W14, 20251, Hamburg, Germany.
| | - H Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Hamburg-Eppendorf, Martinistr. 52, Gebauede W14, 20251, Hamburg, Germany
| | - F Austein
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Hamburg-Eppendorf, Martinistr. 52, Gebauede W14, 20251, Hamburg, Germany
| | - J Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Hospital Hamburg-Eppendorf, Martinistr. 52, Gebauede W14, 20251, Hamburg, Germany
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Kresbach C, Bronsema A, Guerreiro H, Rutkowski S, Schüller U, Winkler B. Long-term survival of an adolescent glioblastoma patient under treatment with vinblastine and valproic acid illustrates importance of methylation profiling. Childs Nerv Syst 2022; 38:479-483. [PMID: 34309720 PMCID: PMC8789637 DOI: 10.1007/s00381-021-05278-6] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 06/29/2021] [Indexed: 11/30/2022]
Abstract
Glioblastoma (GBM) is an exceptionally aggressive brain tumor with a dismal prognosis, demanding fast and precise classification as a base for patient-specific treatment strategies. Here, we report on an adolescent patient with a histologically bona fide GBM that shows a molecular methylation profile suggesting a low-grade glioma-like subgroup. Despite an early relapse, intolerance of temozolomide, and change of treatment strategy to vinblastine and valproic acid (VPA), the patient is now in good clinical condition after more than 5 years since initial diagnosis. This case stresses the merit of methylation array data for clinical prognosis and treatment planning.
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Affiliation(s)
- Catena Kresbach
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, O 47, 20251 Hamburg, Germany ,Research Institute Children’s Cancer Center Hamburg, Hamburg, Germany
| | - Annika Bronsema
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, O 47, 20251 Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Stefan Rutkowski
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, O 47, 20251 Hamburg, Germany
| | - Ulrich Schüller
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, O 47, 20251 Hamburg, Germany ,Research Institute Children’s Cancer Center Hamburg, Hamburg, Germany ,Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Beate Winkler
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, O 47, 20251, Hamburg, Germany.
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Guerreiro H, Avanesov M, Dinnies S, Sehner S, Schön G, Wenzel U, Adam G, Ittrich H, Regier M. Efficiency of Percutaneous Stent Angioplasty in Renal Artery Stenosis - 15 Years of Experience at a Single Center. ROFO-FORTSCHR RONTG 2020; 193:298-304. [PMID: 33003245 DOI: 10.1055/a-1236-4195] [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: 10/23/2022]
Abstract
PURPOSE To determine the therapeutic efficiency of percutaneous revascularization in renal artery stenosis (RAS), as well as the role of comprehensive factors such as patient selection and degree of artery stenosis, on clinical outcome. METHODS AND MATERIALS 101 patients with hemodynamically relevant RAS underwent percutaneous angioplasty (PTA). 65.7 % were male (mean age: 64 years; range: 18-84). The clinical data was retrospectively analyzed. The serum creatinine (Cr), glomerular filtration rate (GFR), and blood pressure (BP) levels pre- and postprocedural, between 6 months and 1 year, were retrospectively collected and statistically analyzed. RESULTS Follow-up data was available in 34 (33.7 %) and 28 patients (27.7 %) for Cr and MAP, respectively. A significant drop in mean arterial pressure (MAP) was observed on follow-up (mean -5.27 mmHg). Higher baseline Cr and MAP values showed a more pronounced drop in the follow-up (Cr: p 0.002; difference to baseline -0.25 mg/dL, 95 %CI:-0.36, -0.07 and BP p < 0.001; diff. to baseline -0.72 mmHg; 95 %CI: -1.4, -0.40). There was no association between comorbidities, gender, and degree of stenosis with renal and BP outcome. No significant improvement in renal function was observed on follow-up (mean Cr drop: -0.015 mg/dL). The age group 51-60 years showed a significant improvement in BP (p 0.030; diff. to baseline -19.2 mmHg; 95 %CI: -34, -4.3). There was a slight reduction in antihypertensive medication following angioplasty (0.2 fewer). Minor complications were recorded in five procedures (4.9 %). CONCLUSION Percutaneous renal artery revascularization in the presence of atherosclerotic RAS is a safe procedure associated with a significant drop in post-procedural BP. No significant improvement in renal function was observed. Further prospective studies focused on patient selection are necessary. KEY POINTS · Percutaneous stent angioplasty in renal artery stenosis is associated with a significant improvement in post-procedural blood pressure control.. · There is no improvement in renal function after percutaneous stent angioplasty for renal artery stenosis (RAS).. · Percutaneous stent angioplasty is a safe procedure.. CITATION FORMAT · Guerreiro H, Avanesov M, Dinnies S et al. Efficiency of Percutaneous Stent Angioplasty in Renal Artery Stenosis - 15 Years of Experience at a Single Center. Fortschr Röntgenstr 2021; 193: 298 - 304.
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Affiliation(s)
- Helena Guerreiro
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maxim Avanesov
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Stefanie Dinnies
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Susanne Sehner
- Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Schön
- Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ulrich Wenzel
- III. Medizinische Klinik, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Harald Ittrich
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Nawka MT, Hanning U, Guerreiro H, Flottmann F, Van Horn N, Buhk JH, Fiehler J, Frölich AM. Feasibility of a customizable training environment for neurointerventional skills assessment. PLoS One 2020; 15:e0238952. [PMID: 32941466 PMCID: PMC7498089 DOI: 10.1371/journal.pone.0238952] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 08/26/2020] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To meet increasing demands to train neuroendovascular techniques, we developed a dedicated simulator applying individualized three-dimensional intracranial aneurysm models ('HANNES'; Hamburg Anatomic Neurointerventional Endovascular Simulator). We hypothesized that HANNES provides a realistic and reproducible training environment to practice coil embolization and to exemplify disparities between neurointerventionalists, thus objectively benchmarking operators at different levels of experience. METHODS Six physicians with different degrees of neurointerventional procedural experience were recruited into a standardized training protocol comprising catheterization of two internal carotid artery (ICA) aneurysms and one basilar tip aneurysm, followed by introduction of one framing coil into each aneurysm and finally complete coil embolization of one determined ICA aneurysm. The level of difficulty increased with every aneurysm. Fluoroscopy was recorded and assessed for procedural characteristics and adverse events. RESULTS Physicians were divided into inexperienced and experienced operators, depending on their experience with microcatheter handling. Mean overall catheterization times increased with difficulty of the aneurysm model. Inexperienced operators showed longer catheterization times (median; IQR: 47; 30-84s) than experienced operators (21; 13-58s, p = 0.011) and became significantly faster during the course of the attempts (rho = -0.493, p = 0.009) than the experienced physicians (rho = -0.318, p = 0.106). Number of dangerous maneuvers throughout all attempts was significantly higher for inexperienced operators (median; IQR: 1.0; 0.0-1.5) as compared to experienced operators (0.0; 0.0-1.0, p = 0.014). CONCLUSION HANNES represents a modular neurointerventional training environment for practicing aneurysm coil embolization in vitro. Objective procedural metrics correlate with operator experience, suggesting that the system could be useful for assessing operator proficiency.
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Affiliation(s)
- Marie Teresa Nawka
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Uta Hanning
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Fabian Flottmann
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Noel Van Horn
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jan-Hendrik Buhk
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jens Fiehler
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Andreas Maximilian Frölich
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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15
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Li Y, Guo S, Zhao K, Conrad C, Driescher C, Rothbart V, Schlomann U, Guerreiro H, Bopp MH, König A, Carl B, Pagenstecher A, Nimsky C, Bartsch JW. ADAM8 affects glioblastoma progression by regulating osteopontin-mediated angiogenesis. Biol Chem 2020; 402:195-206. [PMID: 33544472 DOI: 10.1515/hsz-2020-0184] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/18/2020] [Indexed: 02/06/2023]
Abstract
Glioblastoma multiforme (GBM) is the most aggressive type of brain cancer with a median survival of only 15 months. To complement standard treatments including surgery, radiation and chemotherapy, it is essential to understand the contribution of the GBM tumor microenvironment. Brain macrophages and microglia particularly contribute to tumor angiogenesis, a major hallmark of GBM. ADAM8, a metalloprotease-disintegrin strongly expressed in tumor cells and associated immune cells of GBMs, is related to angiogenesis and correlates with poor clinical prognosis. However, the specific contribution of ADAM8 to GBM tumorigenesis remains elusive. Knockdown of ADAM8 in U87 glioma cells led to significantly decreased angiogenesis and tumor volumes of these cells after stereotactic injection into striate body of mice. We found that the angiogenic potential of ADAM8 in GBM cells and in primary macrophages is mediated by the regulation of osteopontin (OPN), an important inducer of tumor angiogenesis. By in vitro cell signaling analyses, we demonstrate that ADAM8 regulates OPN via JAK/STAT3 pathway in U87 cells and in primary macrophages. As ADAM8 is a dispensable protease for physiological homeostasis, we conclude that ADAM8 could be a tractable target to modulate angiogenesis in GBM with minor side-effects.
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Affiliation(s)
- Yu Li
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Songbo Guo
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Kai Zhao
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Catharina Conrad
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Caroline Driescher
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Vanessa Rothbart
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Uwe Schlomann
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Helena Guerreiro
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Miriam H Bopp
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Alexander König
- Department of Diagnostic and Interventional Radiology, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Barbara Carl
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany
| | - Axel Pagenstecher
- Department of Neuropathology, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany.,Center for Mind, Brain and Behavior, Marburg University, Hans-Meerwein-Straße 6, D-35032 MarburgGermany
| | - Christopher Nimsky
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany.,Center for Mind, Brain and Behavior, Marburg University, Hans-Meerwein-Straße 6, D-35032 MarburgGermany
| | - Jörg W Bartsch
- Department of Neurosurgery, Philipps University Marburg, Baldingerstrasse, D-35033 Marburg, Germany.,Center for Mind, Brain and Behavior, Marburg University, Hans-Meerwein-Straße 6, D-35032 MarburgGermany
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Avanesov M, Löser A, Smagarynska A, Keller S, Guerreiro H, Tahir E, Karul M, Adam G, Yamamura J. Clinico-radiological comparison and short-term prognosis of single acute pancreatitis and recurrent acute pancreatitis including pancreatic volumetry. PLoS One 2018; 13:e0206062. [PMID: 30359398 PMCID: PMC6201910 DOI: 10.1371/journal.pone.0206062] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 10/06/2018] [Indexed: 02/07/2023] Open
Abstract
PURPOSE The necrosis-fibrosis hypothesis describes a continuum between single attacks of acute pancreatitis (SAP), recurrent acute pancreatitis (RAP) and chronic pancreatitis (CP) with endocrine and exocrine pancreatic insufficiency. For prevention purposes we evaluated clinico-radiological parameters and pancreatic volumetry to compare SAP and RAP and provide prognostic relevance on short-term mortality, need for intervention and the hospitalization duration. MATERIALS AND METHODS We retrospectively investigated 225 consecutive patients (150 males, range 19-97years) with acute pancreatitis (74%SAP, 26%RAP) according to the revised Atlanta classification. All patients received an intravenous contrast-enhanced CT after a median time of 5 (IQR 5-7) days after onset of symptoms. Two experienced observers rated the severity of AP by 3 CT scores (CTSI, mCTSI, EPIC). Moreover, total pancreatic volumes and additional parenchymal necrosis volumes were assessed, when appropriate. Clinical parameters were etiology of AP, lipase on admission, CRP 48 hours after admission (CRP48), and the presence of organ dysfunction, assessed by the modified Marshall score. The modified Marshall score included systolic blood pressure, serum creatinine, and the ratio of arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2 ratio) and was assessed on admission and 48 hours after admission to find patients with persistent organ failure. Outcome parameters were total hospitalization duration, short-term mortality and need for intervention. RESULTS Lipase, CRP48, etiology of AP, EPIC, PaO2/FiO2 ratio, and the presence of a pleural effusion differed significantly in both groups (p<0.05). In 109 patients with interstitial edematous AP, the total pancreatic volume was significantly smaller in patients with RAP compared to those with SAP (69±35cm3; (RAP) vs 106±45cm3; (SAP), p<0.001). All outcome parameters including the mortality rates (SAP vs. RAP: 15% vs. 7%) were comparable in both groups (p>0.05). In the necrotizing RAP group, only the necrotic volume correlated significantly with total hospitalization time (r = 0.72, p<0.001), whereas the systolic blood pressure was the only, but weak predictor for short-term mortality (β-coefficient: -0.05, p = 0.03) and the need for intervention (β-coefficient: -0.02, p = 0.048) in the total RAP group. In patients with SAP, the modified Marshall score was the strongest predictor of short-term mortality, followed by the mCTSI on multivariate logistic regression (Marshall score: β-coefficient: 1.79, p<0.001; mCTSI: β-coefficient: 0.40, p<0.001). CTSI was the best predictor for required intervention in necrotizing SAP (β-coefficient: 0.46, p<0.001), followed by the volume of intrapancreatic necrosis (β-coefficient: 0.17, p = 0.03). CONCLUSION Total pancreatic volume differed significantly between interstitial RAP and SAP and intrapancreatic necrosis volume revealed prognostic value for the total hospitalization duration in necrotizing RAP. Although all outcome parameters were comparable between SAP and RAP, only systolic blood pressure and pancreatic volumetry were prognostic in RAP. In SAP, only the modified Marshall score and mCTSI revealed prognostic value for short-term mortality, whereas CTSI was predictive for the need for intervention.
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Affiliation(s)
- Maxim Avanesov
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anastassia Löser
- Department of Radiotherapy and Radiation Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alla Smagarynska
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sarah Keller
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Enver Tahir
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Murat Karul
- Department of Diagnostic and Interventional Radiology, Marienkrankenhaus, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jin Yamamura
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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17
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Gião Antunes A, Peixe B, Guerreiro H. Spontaneous thrombosis of a gastroduodenal artery pseudoaneurysm manifesting as a subepithelial lesion. Revista de Gastroenterología de México (English Edition) 2018. [DOI: 10.1016/j.rgmxen.2017.07.006] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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18
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Gião Antunes A, Vaz AM, Cadillá J, Peixe B, Guerreiro H. Chronic diarrhea and deep vein thrombosis during treatment with olmesartan. Rev Gastroenterol Mex (Engl Ed) 2018; 83:200-202. [PMID: 28676194 DOI: 10.1016/j.rgmx.2016.10.011] [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] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 10/05/2016] [Indexed: 06/07/2023]
Affiliation(s)
- A Gião Antunes
- Departamento de Gastroenterología, Centro Hospitalar do Algarve EPE, Faro, Portugal.
| | - A M Vaz
- Departamento de Gastroenterología, Centro Hospitalar do Algarve EPE, Faro, Portugal
| | - J Cadillá
- Departamento de Patología, Centro Hospitalar do Algarve EPE, Faro, Portugal
| | - B Peixe
- Departamento de Gastroenterología, Centro Hospitalar do Algarve EPE, Faro, Portugal
| | - H Guerreiro
- Departamento de Gastroenterología, Centro Hospitalar do Algarve EPE, Faro, Portugal
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19
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Avanesov M, Wiese NJ, Karul M, Guerreiro H, Keller S, Busch P, Jacobsen F, Adam G, Yamamura J. Diagnostic prediction of complicated appendicitis by combined clinical and radiological appendicitis severity index (APSI). Eur Radiol 2018. [PMID: 29541911 DOI: 10.1007/s00330-018-5339-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [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] [Indexed: 12/17/2022]
Abstract
OBJECTIVES To develop a routinely applicable severity index for the management of acute appendicitis in adults using combined clinical and radiological parameters and retroperitoneal space planes (RSP). METHODS Two hundred consecutive patients with histologically proven acute appendicitis and available presurgical CT scans were analysed retrospectively. Two radiologists assessed all CT scans for morphologic sings of appendicitis and six RSP. Clinical parameters were age, body temperature, C-reactive protein (CRP), white blood cell count, and duration of symptoms. Radiological parameters were appendix diameter and wall thickness, periappendiceal fat stranding and fluid, intraluminal and extraluminal air, thinning of appendiceal wall, caecal wall thickening, appendicolith and abscess formation. RESULTS One hundred and three patients (51%) had histologically proven complicated appendicitis. Based on three clinical (age ≥52 years, body temperature ≥37.5°C, duration of symptoms ≥48 h) and four computed tomography (CT) findings (appendix diameter ≥14 mm, presence of periappendiceal fluid, extraluminal air, perityphlitic abscess), the APSI was developed using regression coefficients of multivariate logistic regression analyses with a maximum of 10 points. A score of ≥4 points predicted complicated appendicitis with a positive predictive value of 92% and a negative predictive value of 83%. Substantial to excellent interobserver agreement was found for the four radiological parameters of the APSI [intraclass correlation coefficient (ICC), 0.78-0.83]. The RSP evaluation presented no added value for the diagnosis of complicated appendicitis. CONCLUSIONS Using APSI, an accurate and simple prediction of complicated appendicitis in adults was possible. The RSP count was not useful for the diagnosis of complicated appendicitis. KEY POINTS • Appendicitis severity score provides an accurate and simple prediction of complicated appendicitis • Appendicitis severity score ≥4 accurately predicted complicated appendicitis (PPV 92%;NPV 83%) • Evaluation of retroperitoneal space planes was not useful in diagnosing complicated appendicitis.
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Affiliation(s)
- Maxim Avanesov
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Centre Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany.
| | - Nis Jesper Wiese
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Centre Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Murat Karul
- Department of Diagnostic and Interventional Radiology, Marienkrankenhaus Hamburg, Hamburg, Germany
| | - Helena Guerreiro
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Centre Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Sarah Keller
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Centre Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Philip Busch
- Department of General, Visceral- and Thoracic Surgery, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Frank Jacobsen
- Department of Pathology, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Gerhard Adam
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Centre Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
| | - Jin Yamamura
- Department of Diagnostic and Interventional Radiology and Nuclear Medicine, University Medical Centre Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany
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Gião Antunes A, Peixe B, Guerreiro H. Spontaneous thrombosis of a gastroduodenal artery pseudoaneurysm manifesting as a subepithelial lesion. Rev Gastroenterol Mex (Engl Ed) 2017; 83:354-356. [PMID: 28460790 DOI: 10.1016/j.rgmx.2017.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/28/2017] [Accepted: 02/22/2017] [Indexed: 11/26/2022]
Affiliation(s)
- A Gião Antunes
- Departamento de Gastroenterología, Centro Hospitalar do Algarve, EPE, Faro, Faro, Portugal.
| | - B Peixe
- Departamento de Gastroenterología, Centro Hospitalar do Algarve, EPE, Faro, Faro, Portugal
| | - H Guerreiro
- Departamento de Gastroenterología, Centro Hospitalar do Algarve, EPE, Faro, Faro, Portugal
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21
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Vaz A, Eusebio M, Antunes A, Sousa A, Perez P, Ornelas R, Granja C, Guerreiro H. Mortality in patients with cirrhosis admitted to the ICU: time to rethink strategies? Crit Care 2015. [PMCID: PMC4472825 DOI: 10.1186/cc14465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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22
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Guerreiro H, Vlasak A, Horinek D, Tichy M, Lisy J, Vanek P, Liby P, Hoza D, Beneš V, Nimsky C. Bobble-head doll syndrome: therapeutic outcome and long-term follow-up in four children. Acta Neurochir (Wien) 2012; 154:2043-9. [PMID: 22886034 DOI: 10.1007/s00701-012-1458-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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: 10/30/2011] [Accepted: 07/17/2012] [Indexed: 11/30/2022]
Abstract
Bobble-head doll syndrome (BHDS) is a complex syndrome with the dominant symptom of repetitive anteroposterior head movement. Only 57 patients are quoted in the literature. The etiology of this syndrome remains unknown and no standard treatment has yet been established. We hereby report four cases treated at our department. All the patients presented a psychomotor retardation due to an obstructive hydrocephalus. All the patients were treated using neuroendoscopic techniques: two with ventriculocystostomy, and two with ventriculocystocisternostomy. Cyst decompression was achieved in all four cases and clinical recovery was evident in three of the four patients observed. After surgery, BHDS persisted longer the more the subsequent treatment was delayed. In this article, we provide a concise overview of the theories of pathogenesis, presentation, and management of this syndrome. Based on our own experience, we state that the method of choice should be the neuroendoscopy and this must be performed promptly after diagnosis is made.
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Affiliation(s)
- Helena Guerreiro
- International Clinical Research Center, St. Annes´s University Hospital Brno, Brno, Czech Republic.
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Areias J, Calinas F, Porto A, Carvalho A, Freitas D, Macedo G, Noronha R, Cotter J, Meliço-Silvestre A, Peixe R, Pratas J, Barrote D, Teixeira R, Augusto F, Carrilho I, Campante F, Velosa J, Carvalho L, Duarte MA, Guerreiro H, Pires C, Silva A, Cotrim I, Guedes F, Tomé L, Marcelino M, Gonçalves C, Ferreira E, Matos L, Peixe P, Esteves J, Valente T, Simões C, Marinho C, Jasmins L, Vieira MJ, Marinho R, Matos P, Estevens J, Carrasquinho J, Salcedo G, Parada P, Teixeira C. One year of Lamivudine therapy for portuguese patients with chronic hepatitis B. Clin Drug Investig 2012; 23:339-46. [PMID: 17535046 DOI: 10.2165/00044011-200323050-00004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To assess the efficacy of lamivudine treatment on hepatitis B e antigen (HBeAg) and/or hepatitis B surface antigen (HBsAg) seroconversion, on other virological and serological markers of response including hepatitis B virus (HBV) DNA and serum aminotransferases, and the safety of lamivudine treatment in hepatitis B patients. PATIENTS This phase III open-label study evaluated the virological and biochemical response to lamivudine in 70 Portuguese patients with HBeAg positive chronic hepatitis B. Patients were treated with lamivudine 100mg once daily for 12 months. METHODS Antiviral activity was assessed by measuring alanine aminotransferase (ALT)/aspartate aminotransferase (AST) levels at all protocol visits, and hepatitis B serology and HBV DNA were performed at baseline and at month 12 visits. Evaluation of safety and tolerance was based on clinical adverse events and laboratory analyses. RESULTS The primary endpoint was virological response at month 12, defined as loss of detectable HBeAg from serum with a reduction of HBV DNA to undetectable levels, and this was observed in 19/69 (27.5%) of patients. Almost half of the patients were HBV DNA negative by this time. Mean ALT values decreased steadily during treatment and by 12 months 61% of patients had values within the normal range. HBeAg seroconversion (HBeAg negative, HBeAb positive) was achieved in 27.9% of patients by 12 months, although all patients remained HBsAg positive. CONCLUSION Lamivudine was well tolerated and the incidence of adverse events was similar to those reported in previous studies. Lamivudine treatment resulted in virological and biochemical improvements in HBeAg positive chronic hepatitis B patients, with HBeAg seroconversion in one-third of patients.
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Affiliation(s)
- J Areias
- Hospital Geral de Santo António, Oporto, Portugal
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Brabec J, Rulseh A, Horinek D, Pala A, Guerreiro H, Buskova J, Petrovicky P, Nemcova V, Krasensky J, Seidl Z, Nimsky C, Sonka K. Volume of the amygdala is reduced in patients with narcolepsy - a structural MRI study. Neuro Endocrinol Lett 2011; 32:652-656. [PMID: 22167152] [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] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 08/25/2011] [Indexed: 05/31/2023]
Abstract
OBJECTIVE Based on the clinical observation that patients suffering from narcolepsy with cataplexy (NC) have cataplectic attacks when they experience positive emotions, it is therefore hypothesised that the abnormal processing of external emotional input through the limbic system, or motor dysregulation induced by emotions, takes place during these episodes. To date, imaging studies have failed to reveal consistent brain abnormalities in NC patients. METHODS Considering the discrepancies in reported structural or functional abnormalities of the hypothalamus, amygdala, and nucleus accumbens, we used the MRI volumetry to determine the volumes of the amygdala and nucleus accumbens in a group of eleven patients with NC (5 males and 6 females, mean age 41.7 years ± 17.7). This data was compared to an equal number of examinations in healthy volunteers matched for age and gender. RESULTS We found a decrease in the amygdalar volume of NC patients in both raw (p<0.001) and relative (p<0.01) data sets. The difference in amygdalar volume between healthy volunteers and NC patients was about 17%. In contrast to the amygdala, we did not find any differences in the volumes of nucleus accumbens. CONCLUSION In the present MRI volumetric study, we found bilateral gray matter loss in the amygdala only.
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Affiliation(s)
- Jiri Brabec
- Institute of Anatomy, Charles University, Prague, Czech Republic
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Gloria H, Areias J, Augusto F, Carvalho A, Moura M, Guerreiro H, Lebre L, Marinho R, Matos L, Monteverde C, Peixe P, Raimundo M, Ramalho F, Rodrigues B, Serejo F, Vale A. P.268 Treatment of patients infected with hepatitis C virus genotype 4 in Portugal — retrospective study. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80448-8] [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: 10/24/2022]
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Flannery B, Costa D, Carvalho FP, Guerreiro H, Matsunaga J, Da Silva ED, Ferreira AG, Riley LW, Reis MG, Haake DA, Ko AI. Evaluation of recombinant Leptospira antigen-based enzyme-linked immunosorbent assays for the serodiagnosis of leptospirosis. J Clin Microbiol 2001; 39:3303-10. [PMID: 11526167 PMCID: PMC88335 DOI: 10.1128/jcm.39.9.3303-3310.2001] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2001] [Accepted: 07/01/2001] [Indexed: 11/20/2022] Open
Abstract
There is an urgent need for development of new serodiagnostic strategies for leptospirosis, an emerging zoonosis with worldwide distribution. We have evaluated the diagnostic utility of five recombinant antigens in enzyme-linked immunosorbent assays (ELISAs) for serodiagnosis of leptospirosis. Sera from 50 healthy residents of a high-incidence region were used to determine cutoff values for 96% specificity. In paired sera from 50 cases of leptospirosis confirmed by the microscopic agglutination test, immunoglobulin G (IgG) but not IgM reacted with the recombinant leptospiral proteins. The recombinant LipL32 IgG ELISA had the highest sensitivities in the acute (56%) and convalescent (94%) phases of leptospirosis. ELISAs based on recombinant OmpL1, LipL41, and Hsp58 had sensitivities of 16, 24, and 18% during the acute phase and 72, 44, and 32% during convalescence, respectively. Compared to sera from healthy individuals, patient sera did not react significantly with recombinant LipL36 (P > 0.05). Recombinant LipL32 IgG ELISA demonstrated 95% specificity among 100 healthy individuals, and specificities ranging from 90 to 97% among 30 dengue patients, 30 hepatitis patients, and 16 patients with diseases initially thought to be leptospirosis. Among 39 Venereal Disease Research Laboratory test-positive individuals and 30 Lyme disease patients, 13 and 23% of sera, respectively, reacted positively with the rLipL32 antigen. These findings indicate that rLipL32 may be an useful antigen for the serodiagnosis of leptospirosis.
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Affiliation(s)
- B Flannery
- School of Public Health, University of California, Berkeley, California 94720, USA
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Guerreiro H, Croda J, Flannery B, Mazel M, Matsunaga J, Galvão Reis M, Levett PN, Ko AI, Haake DA. Leptospiral proteins recognized during the humoral immune response to leptospirosis in humans. Infect Immun 2001; 69:4958-68. [PMID: 11447174 PMCID: PMC98588 DOI: 10.1128/iai.69.8.4958-4968.2001] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Leptospirosis is an emerging zoonosis caused by pathogenic spirochetes belonging to the genus Leptospira. An understanding of leptospiral protein expression regulation is needed to develop new immunoprotective and serodiagnostic strategies. We used the humoral immune response during human leptospirosis as a reporter of protein antigens expressed during infection. Qualitative and quantitative immunoblot analysis was performed using sera from 105 patients from Brazil and Barbados. Sera from patients with other diseases and healthy individuals were evaluated as controls. Seven proteins, p76, p62, p48, p45, p41, p37, and p32, were identified as targets of the humoral response during natural infection. In both acute and convalescent phases of illness, antibodies to lipopolysaccharide were predominantly immunoglobulin M (IgM) while antibodies to proteins were exclusively IgG. Anti-p32 reactivity had the greatest sensitivity and specificity: positive reactions were observed in 37 and 84% of acute- and convalescent-phase sera, respectively, while only 5% of community control individuals demonstrated positive reactions. Six immunodominant antigens were expressed by all pathogenic leptospiral strains tested; only p37 was inconsistently expressed. Two-dimensional immunoblots identified four of the seven infection-associated antigens as being previously characterized proteins: LipL32 (the major outer membrane lipoprotein), LipL41 (a surface-exposed outer membrane lipoprotein), and heat shock proteins GroEL and DnaK. Fractionation studies demonstrated LipL32 and LipL41 reactivity in the outer membrane fraction and GroEL and DnaK in the cytoplasmic fraction, while p37 appeared to be a soluble periplasmic protein. Most of the other immunodominant proteins, including p48 and p45, were localized to the inner membrane. These findings indicate that leptospiral proteins recognized during natural infection are potentially useful for serodiagnosis and may serve as targets for vaccine design.
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Affiliation(s)
- H Guerreiro
- Gonçalo Moniz Research Center, Oswaldo Cruz Foundation, Brazilian Ministry of Health, 40295-001, Brazil
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