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Van Kessel M, Pham C, Tros R, Oosterhuis J, Kuchenbecker W, Bongers M, Mol B, Koks C. P-750 The cost-effectiveness of transvaginal hydrolaparoscopy versus hysterosalpingography in the work-up for subfertility. Hum Reprod 2022. [DOI: 10.1093/humrep/deac106.076] [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: 11/15/2022] Open
Abstract
Abstract
Study question
Is transvaginal hydrolaparoscopy (THL) cost-effective compared to hysterosalpingography (HSG) in the work-up for subfertility in a population at low-risk for tubal pathology?
Summary answer
THL is cost-effective compared to HSG in a preselected group of women at low-risk of tubal pathology.
What is known already
Tubal pathology is a common cause of subfertility and tubal patency testing plays an important part in the work-up of the subfertile couple and the subsequent counseling for fertility treatment. THL is an out-patient procedure. After access through the pouch of Douglas, the tubes and pelvic cavity are directly observed using hydroflotation, whereas HSG is a radiographic evaluation of the uterine cavity and patency of the tubes with injection of contrast medium in the uterine cavity. Both methods are safe and feasible for subfertile women at low-risk of tubal pathology.
Study design, size, duration
We performed an economic analysis as part of a randomized controlled trial comparing THL and HSG in the work-up for subfertility. Women were eligible if they had an indication for evaluation of tubal patency. Primary outcome was a conception leading to live birth in 24 months. We randomly assigned 300 subfertile women to THL or HSG between May 2013 and October 2016.
Participants/materials, setting, methods
This study was performed in four Dutch teaching hospitals. The economic evaluation was performed from a health care perspective. Costs were either derived from literature or calculated. The mean costs and outcomes for each treatment group were compared. Costs were combined with effectiveness by calculating ICER, and bootstrap resampling was performed. We generated a cost-effectiveness plane and cost-effectiveness acceptability curves.
Main results and the role of chance
After 24 months of follow-up there was a 3% difference in live birth rate in favour of the THL group (58.5% in the THL group versus 55.4% in the HSG group (83/142 versus 82/148 difference 3.0% (95% CI: -8.3 – 14.4)). Multiple pregnancy and miscarriage rate were low and did not differ between groups. Ectopic pregnancy occurred in two women in the HSG group and not in the THL group. The mean cost was lower in the THL group, compared to the HSG group (THL group 4,927 EUR versus 5,197 EUR in the HSG group, difference -270 EUR). Although the costs of the diagnostic procedure itself were higher in the THL group (425 EUR versus 289 EUR, difference 136 EUR), the costs for fertility treatments are higher in the HSG group. The base case outcome is that THL costs less and is more effective than HSG, making THL the dominant strategy. The spread of the bootstrap indicates that there is uncertainty regarding the effectiveness of THL over HSG but less uncertainty regarding the cost difference between THL and HSG.
Limitations, reasons for caution
This trial was conducted in the Netherlands, using price calculations of the Dutch healthcare system in Euro’s. Since prices of fertility treatments and especially ART or fertility enhancing surgery can vary widely worldwide, it is possible that the outcomes of our study are not generalizable to other countries.
Wider implications of the findings
The findings of our trial suggest that in a preselected group of women with low risk for tubal pathology, a diagnostic strategy starting with THL is cost-effective compared to a diagnostic strategy starting with HSG in the workup for subfertility.
Trial registration number
NTR3462
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Affiliation(s)
- M Van Kessel
- Dr. Horacio E. Oduber Hospitaal, Obstetrics and gynecology , Oranjestad Aruba, The Netherlands
| | - C Pham
- Flinders Health and Medical Research Institute, College of Medicine & Public Health , Adelaide, Australia
| | - R Tros
- Amsterdam UMC, Obstetrics and gynecology , Amsterdam, The Netherlands
| | - J Oosterhuis
- St. Antonius Hospital, Obstetrics and gynecology , Nieuwegein, The Netherlands
| | - W Kuchenbecker
- Isala klinieken, Obstetrics and gynecology , Zwolle, The Netherlands
| | - M Bongers
- GROW – School for Oncology and Developmental Biology- Maastricht University Medical Centre, Obstetrics and gynecology , Maastricht, The Netherlands
| | - B Mol
- Monash University Monash Medical Centre, Obstetrics and gynecology , Clayton, Australia
| | - C Koks
- Maxima Medical Center, Obstetrics and Gynecology , Veldhoven, The Netherlands
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van Ijsselmuiden M, van Oudheusden A, Veen J, van de Pol G, Vollebregt A, Radder C, Housmans S, van Kuijk S, Deprest J, Bongers M, van Eijndhoven H. Authors' reply re: Hysteropexy in the treatment of uterine prolapse stage 2 or higher: laparoscopic sacrohysteropexy versus sacrospinous hysteropexy-a multicentre randomised controlled trial (LAVA trial). BJOG 2021; 128:939-940. [PMID: 33550670 DOI: 10.1111/1471-0528.16640] [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] [Accepted: 12/29/2020] [Indexed: 12/01/2022]
Affiliation(s)
- M van Ijsselmuiden
- Department of Obstetrics & Gynaecology, Isala, Zwolle, The Netherlands.,Department of Obstetrics & Gynecology, GROW school for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - A van Oudheusden
- Department of Obstetrics & Gynecology, GROW school for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - J Veen
- Department of Obstetrics & Gynecology, Máxima Medical Centre, Veldhoven, The Netherlands
| | - G van de Pol
- Department of Obstetrics & Gynecology, Gelre Hospitals, Apeldoorn, The Netherlands
| | - A Vollebregt
- Department of Obstetrics & Gynecology, Spaarnegasthuis, Haarlem, The Netherlands
| | - C Radder
- Department of Obstetrics & Gynecology, OLVG, Amsterdam, The Netherlands
| | - S Housmans
- Department of Obstetrics & Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - S van Kuijk
- Department of Obstetrics & Gynecology, GROW school for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - J Deprest
- Department of Obstetrics & Gynecology, University Hospitals Leuven, Leuven, Belgium
| | - M Bongers
- Department of Obstetrics & Gynecology, GROW school for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands.,Department of Obstetrics & Gynecology, Máxima Medical Centre, Veldhoven, The Netherlands
| | - H van Eijndhoven
- Department of Obstetrics & Gynaecology, Isala, Zwolle, The Netherlands
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Cahn W, Hulshoff Pol HE, Bongers M, Schnack HG, Mandl RCW, Van Haren NEM, Durston S, Koning H, Van Der Linden JA, Kahn RS. Brain morphology in antipsychotic-naïve schizophrenia: A study of multiple brain structures. Br J Psychiatry 2018; 43:s66-72. [PMID: 12271803 DOI: 10.1192/bjp.181.43.s66] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BackgroundAlthough brain volume changes are found in schizophrenia, only a limited number of structural magnetic resonance imaging studies have exclusively examined antipsychotic-naïve patients.AimsTo comprehensively investigate multiple brain structures in a single sample of patients who were antipsychotic-naïve.MethodTwenty antipsychotic-naïve patients with first-episode schizophrenia and 20 healthy comparison subjects were included. Intracranial, total brain, frontal lobe, grey and white matter, cerebellar, hippocampal, parahippocampal, thalamic, caudate nucleus and lateral and third ventricular volumes were measured. Repeated-measures analyses of (co)variance were conducted with intracranial volume as covariate.ResultsThird ventricle volume enlargement was found in patients compared with the healthy subjects. No differences were found in other brain regions.ConclusionsThese findings suggest that some brain abnormalities are present in the early stages of schizophrenia. Moreover, it suggests that brain abnormalities reported in patients with chronic schizophrenia develop in a later stage of the disease and/or are medication induced.
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Affiliation(s)
- W Cahn
- Department of Psychiatry, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands.
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Vervoort A, van der Voet LF, Hehenkamp W, Thurkow AL, van Kesteren P, Quartero H, Kuchenbecker W, Bongers M, Geomini P, de Vleeschouwer L, van Hooff M, van Vliet H, Veersema S, Renes WB, Oude Rengerink K, Zwolsman SE, Brölmann H, Mol B, Huirne J. Hysteroscopic resection of a uterine caesarean scar defect (niche) in women with postmenstrual spotting: a randomised controlled trial. BJOG 2017; 125:326-334. [PMID: 28504857 PMCID: PMC5811899 DOI: 10.1111/1471-0528.14733] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [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] [Accepted: 05/03/2017] [Indexed: 11/29/2022]
Abstract
Objective To compare the effectiveness of a hysteroscopic niche resection versus no treatment in women with postmenstrual spotting and a uterine caesarean scar defect. Design Multicentre randomised controlled trial. Setting Eleven hospitals collaborating in a consortium for women's health research in the Netherlands. Population Women reporting postmenstrual spotting after a caesarean section who had a niche with a residual myometrium of ≥3 mm, measured during sonohysterography. Methods Women were randomly allocated to hysteroscopic niche resection or expectant management for 6 months. Main outcome measures The primary outcome was the number of days of postmenstrual spotting 6 months after randomisation. Secondary outcomes were spotting at the end of menstruation, intermenstrual spotting, dysuria, sonographic niche measurements, surgical parameters, quality of life, women's satisfaction, sexual function, and additional therapy. Outcomes were measured at 3 months and, except for niche measurements, also at 6 months after randomisation. Results We randomised 52 women to hysteroscopic niche resection and 51 women to expectant management. The median number of days of postmenstrual spotting at baseline was 8 days in both groups. At 6 months after randomisation, the median number of days of postmenstrual spotting was 4 days (interquartile range, IQR 2–7 days) in the intervention group and 7 days (IQR 3–10 days) in the control group (P = 0.04); on a scale of 0–10, discomfort as a result of spotting had a median score of 2 (IQR 0–7) in the intervention group, compared with 7 (IQR 0–8) in the control group (P = 0.02). Conclusions In women with a niche with a residual myometrium of ≥3 mm, hysteroscopic niche resection reduced postmenstrual spotting and spotting‐related discomfort. Tweetable abstract A hysteroscopic niche resection is an effective treatment to reduce niche‐related spotting. A hysteroscopic niche resection is an effective treatment to reduce niche‐related spotting.
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Affiliation(s)
- Ajmw Vervoort
- Department of Obstetrics and Gynaecology, ICaR-VU Institure, VU University Medical Centre, Amsterdam, the Netherlands
| | - L F van der Voet
- Department of Obstetrics and Gynaecology, Deventer Hospital, Deventer, the Netherlands
| | - Wjk Hehenkamp
- Department of Obstetrics and Gynaecology, ICaR-VU Institure, VU University Medical Centre, Amsterdam, the Netherlands
| | - A L Thurkow
- Department of Obstetrics and Gynaecology, OLVG, location west, Amsterdam, the Netherlands
| | - Pjm van Kesteren
- Department of Obstetrics and Gynaecology, Onze Lieve Vrouwe Gasthuis, location east, Amsterdam, the Netherlands
| | - H Quartero
- Department of Obstetrics and Gynaecology, Medical Spectrum Twente, Enschede, the Netherlands
| | - W Kuchenbecker
- Department of Obstetrics and Gynaecology, Isala Clinics, Zwolle, the Netherlands
| | - M Bongers
- Department of Obstetrics and Gynaecology, Maxima Medical Centre, Eindhoven, the Netherlands.,Grow School of Oncology and Developmental Biology, Maastricht University, Maastricht, the Netherlands
| | - P Geomini
- Department of Obstetrics and Gynaecology, Maxima Medical Centre, Eindhoven, the Netherlands
| | - Lhm de Vleeschouwer
- Department of Obstetrics and Gynaecology, Sint Fransiscus Gasthuis, Rotterdam, the Netherlands
| | - Mha van Hooff
- Department of Obstetrics and Gynaecology, Sint Fransiscus Gasthuis, Rotterdam, the Netherlands
| | - H van Vliet
- Department of Obstetrics and Gynaecology, Catharina Hospital, Eindhoven, the Netherlands
| | - S Veersema
- Department of Obstetrics and Gynaecology, Sint Antonius Hospital, Nieuwegein, the Netherlands
| | - W B Renes
- Department of Obstetrics and Gynaecology, IJsselland Hospital, Capelle aan den Ijssel, the Netherlands
| | - K Oude Rengerink
- Department of Obstetrics and Gynaecology, Academic Medical Centre, Amsterdam, the Netherlands
| | - S E Zwolsman
- Department of Obstetrics and Gynaecology, Academic Medical Centre, Amsterdam, the Netherlands
| | - Ham Brölmann
- Department of Obstetrics and Gynaecology, ICaR-VU Institure, VU University Medical Centre, Amsterdam, the Netherlands
| | - Bwj Mol
- The Robinson Research Institute
- School of Pediatrics and Reproductive Health University of Adelaide and The South Australian Health and Medical Research Institute, Adelaide, SA, Australia
| | - Jaf Huirne
- Department of Obstetrics and Gynaecology, ICaR-VU Institure, VU University Medical Centre, Amsterdam, the Netherlands
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Bongers M, Bier G, Schabel C, Nikolaou K, Horger M. Frequenzselektive, nichtlineare Fensterung zur Steigerung der Erkennbarkeit von Lungenarterienembolien und venösen Thrombosen in der Computertomografie. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600186] [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: 10/19/2022]
Affiliation(s)
- M Bongers
- Radiologische Klinik Universitätsklinikum Tübingen, Abteilung für Diagnostische und Interventionelle Radiologie, Tübingen
| | - G Bier
- Radiologische Klinik Universitätsklinikum Tübingen, Abteilung für Diagnostische und Interventionelle Neuroradiologie, Tübingen
| | - C Schabel
- Radiologische Klinik Universitätsklinikum Tübingen, Abteilung für Diagnostische und Interventionelle Radiologie, Tübingen
| | - K Nikolaou
- Radiologische Klinik Universitätsklinikum Tübingen, Abteilung für Diagnostische und Interventionelle Radiologie, Tübingen
| | - M Horger
- Radiologische Klinik Universitätsklinikum Tübingen, Abteilung für Diagnostische und Interventionelle Radiologie, Tübingen
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Bongers M, Schabel C, Stefan N, Häring H, Fritsche A, Claussen C, Nikolaou K, Schick F, Machann J. Einfluss der Körperfettverteilung auf die systemische Low-Grade-Inflammation und Insulinsensitivität in Prädiabetikern. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581326] [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: 10/22/2022]
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Schabel C, Bongers M, Gatidis S, Kupferschläger J, Schüle S, la Fougère C, Nikolaou K, Pfannenberg C. Verbesserung der Schwächungskorrektur des PET/CT mit einem neuartigen Algorithmus zur iterativen Metallartefaktreduktion (IMAR). ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581652] [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: 10/22/2022]
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Bongers M, Bier G, Hendrik, Ditt H, Kloth C, Schabel C, Nikolaou K, Horger M. Vergleich eines neuartigen, frequenzselektiven Algorithmus nicht linearer Fensterung, monoenergetischer niedrig-keV Extrapolationen und niedrig-kV Akquisitionen zur Steigerung des Bildkontrastes. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581279] [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: 10/22/2022]
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Brölmann H, Bongers M, Gupta J, Garza-Leal JG, Quartero R, Veersema S, Toub DB. Early Clinical Response to Intrauterine Ultrasound-Guided Transcervical Radiofrequency Ablation. J Minim Invasive Gynecol 2015; 22:S41. [DOI: 10.1016/j.jmig.2015.08.114] [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: 10/22/2022]
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Grosse U, Syha R, Partovi S, Keßler DE, Bongers M, Seith F, Nikolaou K, Robbin M, Schick F, Springer F. Intradiurnal Fluctuations of Off-Resonance Saturation Effects in Healthy Human Achilles Tendons Assessed with a 3D Ultrashort Echo Time MRI Sequence at 3 Tesla. ROFO-FORTSCHR RONTG 2015; 187:1003-10. [PMID: 26090729 DOI: 10.1055/s-0035-1553187] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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 The purpose of this study was to evaluate whether gravitational interstitial fluid accumulation in healthy subjects has an impact on off-resonance saturation ratios (OSR) or the volume of the Achilles tendon after a prolonged time of reduced levels of physical activity. MATERIALS AND METHODS 7 healthy volunteers were repeatedly investigated on 3 consecutive days on a 3 T whole body MR scanner using an ultrashort echo time (UTE) imaging sequence with a Gaussian off-resonance saturation pulse at a frequency offset of 2000 Hz to calculate OSR values. For accurate volumetric quantification of the Achilles tendon, a newly developed contour detection snake algorithm was applied on high-resolution isotropic T2-weighted SPACE sequence datasets. Single-measure intraclass correlation coefficients (ICC) were calculated to estimate test-retest reliability. RESULTS For OSR and tendon volume measurements on three consecutive days, excellent reproducibility could be achieved with ICC values above 0.96 and 0.97, respectively. Comparing the results of all three days, a statistically significant mean individual percentage decrease (- 4.1 ± 1.5 %; p = 0.001) of calculated tendon OSR values was found for the evening measurements. No statistically significant difference between tendon volumes in the morning and the evening could be detected (p = 0.589). CONCLUSION The results of this in-vivo study demonstrate a significant influence of gravitational interstitial fluid accumulation after reduced physical activity on OSR values in the Achilles tendon, but not on tendon volume. Taken together with the demonstrated excellent reproducibility, these findings are important for future studies investigating temporal changes of the Achilles tendon microstructure.
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Affiliation(s)
- U Grosse
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - R Syha
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - S Partovi
- Department of Radiology, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Germany
| | - D E Keßler
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - M Bongers
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - F Seith
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - K Nikolaou
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - M Robbin
- Department of Radiology, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Germany
| | - F Schick
- Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
| | - F Springer
- Department of Diagnostic and Interventional Radiology, University Hospital Tuebingen, Germany
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Bakens M, van Gestel Y, Bongers M, Lemmens V, de Hingh I. O-002 Socio-economic status influences chance of undergoing surgical treatment for pancreatic cancer in the Netherlands. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv235.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Smit JG, Overdijkink S, Mol BW, Kasius JC, Torrance HL, Eijkemans MJC, Bongers M, Emanuel MH, Vleugels M, Broekmans FJM. The impact of diagnostic criteria on the reproducibility of the hysteroscopic diagnosis of the septate uterus: a randomized controlled trial. Hum Reprod 2015; 30:1323-30. [DOI: 10.1093/humrep/dev082] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 03/25/2015] [Indexed: 11/13/2022] Open
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Bongers M, Stefan N, Fritsche A, Häring H, Nikolaou K, Schick F, Machann J. Zusammenhänge zwischen dem Lebervolumen der Ausprägung der intrahepatischen Lipide und dem Körpergewicht – eine MRT-Interventionsstudie. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550889] [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: 10/23/2022]
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Bongers M, Schabel C, Homann G, Mangold S, Tsiflikas I, Ketelsen D, Nikolaou K, Thomas C. Das Potential von Gadolinium als Kontrastmittel in der Dual-Energy Computertomografie – eine ex vivo Phantom-Studie. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550858] [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: 10/23/2022]
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Bongers M, Stefan N, Fritsche A, Häring H, Bamberg F, Nikolaou K, Schick F, Machann J. Zusammenhänge zwischen T2, T2* und Indikatoren einer hepatischen Entzündungskonstellation als Frühzeichen einer nicht alkoholischen Fettlebererkrankung in asymptomatischen Hoch-Risiko-Probanden. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550888] [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: 10/23/2022]
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Homann G, Kloth C, Bongers M, Schabel C, Nikolaou K, Notohamiprodjo M. Beschleunigung der Evaluationszeit von Rippenfrakturen durch softwaregestützte Auffaltung der Rippen entlang ihrer Längsachse. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550788] [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: 10/23/2022]
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Veersema S, Bongers M, Quartero R, Brölmann H, Garza-Leal J, Gupta J, Toub D. Transcervical, Intrauterine Ultrasound-Guided Radiofrequency Ablation of Uterine Fibroids with the VizAblate® System: 12-Month Reduction of Fibroid Perfused and Total Volume. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Brölmann H, Gupta J, Bongers M, Garza-Leal J, Quartero R, Veersema S, Toub D. Transcervical, Intrauterine Sonography-Guided Radiofrequency Ablation of Uterine Fibroids with the VizAblate® System: 12-Month Safety, Reintervention and Pregnancy Outcomes. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Quartero R, Garza-Leal J, Veersema S, Gupta J, Bongers M, Brölmann H, Toub D. Menstrual Blood Loss Reduction at Twelve Months after Radiofrequency Ablation of Uterine Fibroids with the VizAblate® System. J Minim Invasive Gynecol 2014. [DOI: 10.1016/j.jmig.2014.08.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mangold S, Gatidis S, Schabel C, Bongers M, Luz O, Claussen CD, Thomas C. Monoenergetische Bildgebung mittels Single-Source Dual Energy CT: Einsatz zur Reduktion von Metallartefakten. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372739] [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: 10/25/2022]
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Thomas C, Schabel C, Bongers M, Katja W, Claussen C, Horger M. Dual Energy CT: Direkte Knochenmarkdarstellung durch Subtraktion von Kalzium bei Multiplem Myelom. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373289] [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: 10/25/2022]
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Schabel C, Bongers M, Mangold S, Grosse U, Schick F, Claussen C, Thomas C. Voll integrierte CT Detektortechnologie: Evaluation des Dosiseinsparpotentials. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372721] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Schabel C, Bongers M, Sedlmair M, Korn A, Grosse U, Mangold S, Claussen CD, Thomas C. Assessment of the hepatic veins in poor contrast conditions using dual energy CT: evaluation of a novel monoenergetic extrapolation software algorithm. ROFO-FORTSCHR RONTG 2014; 186:591-7. [PMID: 24756426 DOI: 10.1055/s-0034-1366423] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
PURPOSE To evaluate a novel monoenergetic post-processing algorithm (MEI+) in patients with poor intrahepatic contrast enhancement. MATERIALS AND METHODS 25 patients were retrospectively included in this study. Late-phase imaging of the upper abdomen, which was acquired in dual-energy mode (100/140 kV), was used as a model for poor intrahepatic contrast enhancement. Traditional monoenergetic images (MEI), linearly weighted mixed images with different mixing ratios (MI), sole 100 and 140 kV and MEI+ images were calculated. MEI+ is a novel technique which applies frequency-based mixing of the low keV images and an image of optimal keV from a noise perspective to combine the benefits of both image stacks. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the intrahepatic vasculature (IHV) and liver parenchyma (LP) were objectively measured and depiction of IHV was subjectively rated and correlated with portal venous imaging by two readers in consensus. RESULTS MEI+ was able to increase the SNR of the IHV (5.7 ± 0.4 at 40keV) and LP (4.9 ± 1.0 at 90keV) and CNR (2.1 ± 0.6 at 40keV) greatly compared to MEI (5.1 ± 1.1 at 80keV, 4.7 ± 1.0 at 80keV, 1.0 ± 0.4 at 70keV), MI (5.2 ± 1.1 M5:5, 4.8 ± 1.0 M5:5, 1.0 ± 3.5 M9:1), sole 100 kV images (4.4 ± 1.0, 3.7 ± 0.8, 1.0 ± 0.3) and 140 kV images (2.8 ± 0.5, 3.1 ± 0.6, 0.1 ± 0.2). Subjective assessment rated MEI+ of virtual 40 keV superior to all other images. CONCLUSION MEI+ is a very promising algorithm for monoenergetic extrapolation which is able to overcome noise limitations associated with traditional monoenergetic techniques at low virtual keV levels and consequently does not suffer from a decline of SNR and CNR at low keV values. This algorithm allows an improvement of IHV depiction in the presence of poor contrast. KEY POINTS • The evaluated new image-based algorithm for virtual monoenergetic imaging allows calculating low virtual keV images from dual energy datasets with significantly improved contrast-to-noise ratios. • The image based novel monoenergetic extrapolation algorithm applies frequency-based mixing of the low keV images and an image of optimal keV from a noise perspective to combine the benefits of both image stacks.• When compared to traditional monoenergetic images, the novel monoenergetic algorithm has improved contrast-to-noise ratios for both low and high virtual keV images.• Contrast-enhanced dual energy images with poor contrast conditions can be significantly improved, e.g. late phase imaging of the liver.
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Affiliation(s)
- C Schabel
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - M Bongers
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | | | - A Korn
- Department of Diagnostic and Interventional Neuroradiology, University Hospital of Tuebingen
| | - U Grosse
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - S Mangold
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - C D Claussen
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
| | - C Thomas
- Department of Diagnostic and Interventional Radiology, University Hospital of Tuebingen
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Bongers M, Brölmann H, Gupta J, Garza-Leal J, Uecker D, Toub D. Transcervical, Intrauterine Ultrasound-Guided Radiofrequency Ablation of Uterine Fibroids with the VizAblate™ System: Preliminary Analysis of the FAST-EU Trial. J Minim Invasive Gynecol 2013. [DOI: 10.1016/j.jmig.2013.08.161] [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: 10/26/2022]
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Gupta J, Bongers M, Brölmann H, Garza-Leal J, Uecker D, Toub D. Transcervical, Intrauterine Ultrasound-Guided Radiofrequency Ablation of Uterine Fibroids with the VizAblate™ System: Initial Three- and Six-Month Efficacy Results of the FAST-EU Trial. J Minim Invasive Gynecol 2012. [DOI: 10.1016/j.jmig.2012.08.581] [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: 10/27/2022]
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Bongers M, Herman M, Josien P, Mol B. Ten-Year Follow-Up of a Randomized Controlled Trial Comparing NovaSure and ThermaChoice I Endometrial Ablation for Dysfunctional Uterine Bleeding. J Minim Invasive Gynecol 2011. [DOI: 10.1016/j.jmig.2011.08.519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Bongers M, Penninx J. A Comparison of Two Second Generation Endometrial Ablation Techniques. J Minim Invasive Gynecol 2009. [DOI: 10.1016/j.jmig.2009.08.455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bongers M, Reich H. 36: Novasure Endometrial Ablation as an Outpatient Procedure. J Minim Invasive Gynecol 2007. [DOI: 10.1016/j.jmig.2007.08.037] [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: 10/22/2022]
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Jonker MJ, Svendsen C, Bedaux JJM, Bongers M, Kammenga JE. Significance testing of synergistic/antagonistic, dose level-dependent, or dose ratio-dependent effects in mixture dose-response analysis. Environ Toxicol Chem 2005; 24:2701-13. [PMID: 16268173 DOI: 10.1897/04-431r.1] [Citation(s) in RCA: 327] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
In ecotoxicology, the state of the art for effect assessment of chemical mixtures is through multiple dose-response analysis of single compounds and their combinations. Investigating whether such data deviate from the reference models of concentration addition and/or independent action to identify overall synergism or antagonism is becoming routine. However, recent data show that more complex deviation patterns, such as dose ratio-dependent deviation and dose level-dependent deviation, need to be addressed. For concentration addition, methods to detect such deviation patterns exist, but they are stand-alone methods developed separately in literature, and conclusions derived from these analyses are therefore difficult to compare. For independent action, hardly any methods to detect such deviations from this reference model exist. This paper describes how these well-established mixture toxicity principles have been incorporated in a coherent data analysis procedure enabling detection and quantification of dose level-and dose ratio-specific synergism or antagonism from both the concentration addition and the independent action models. Significance testing of which deviation pattern describes the data best is carried out through maximum likelihood analysis. This analysis procedure is demonstrated through various data sets, and its applicability and limitations in mixture research are discussed.
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Affiliation(s)
- Martijs J Jonker
- Laboratory of Nematology, Wageningen University, Binnenhaven 5, 6709 PD Wageningen, The Netherlands
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Abstract
BACKGROUND Benzodiazepines are frequently prescribed for sleep disturbances. However, benzodiazepines are associated with side effects, and may be ineffective when used for a prolonged period of time. OBJECTIVES To investigate for individual patients whether placebo was as effective as temazepam, or whether 10 mg was as effective as 20 mg temazepam, and whether these results influenced their future temazepam use. METHODS A series of randomized double-blind N-of-1 trials were conducted in general practices in The Netherlands for patients who were using temazepam regularly. Each patient received five pairs of treatments consisting of one week of temazepam (10 or 20 mg) and one week of the control intervention (placebo or 10 mg temazepam). Per pair, the sequence of treatments was randomized. Main outcome measures were: time to fall asleep, and the individual main complaint. RESULTS Twelve out of 15 patients completed their trial. In three patients there was no difference, in five a large difference, and in four a small difference in favour of temazepam. At follow-up, seven patients had stopped or reduced their temazepam use. CONCLUSION The results regarding the efficacy of temazepam varied across patients. N-of-1 trials seem to be valuable in patients who are motivated to stop or reduce their temazepam use. They clearly demonstrate the efficacy of temazepam, and may give patients additional confidence to discontinue regular hypnotic use. The value of N-of-1 trials for patients who are less motivated is unclear, as the size of treatment effect does not seem to influence future hypnotic use.
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Affiliation(s)
- A C M Wegman
- Institute for Research in Extramural Medicine, Department of General Practice, VU University Medical Center, Amsterdam, The Netherlands
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Bongers M, Rusch B, Van Gestel CAM. The effect of counterion and percolation on the toxicity of lead for the springtail Folsomia candida in soil. Environ Toxicol Chem 2004; 23:195-199. [PMID: 14768885 DOI: 10.1897/02-508] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In standard soil toxicity tests, heavy metals are amended as water-soluble salts. The role of the counterion in metal salt toxicity is scarcely looked into. In this study, we assessed the contribution of nitrate and chloride to the toxicity of lead to Folsomia candida in a natural standard soil. Both lead salts were tested according the standard test protocol as well as after percolation of the soil with deionized water. Lead nitrate was more toxic than lead chloride for survival as well as reproduction. Percolation proved to be an effective method to remove counterions from the soil. Survival of F. candida increased for both metal salts when percolation was included. Percolation reduced the reproduction toxicity of lead, the effect of which was largest for the nitrate salt. In percolated treatments, the nitrate and chloride lead salts did not differ in toxicity. It is concluded that counterions contribute to metal toxicity and that nitrate is more toxic to F. candida than chloride.
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Affiliation(s)
- Marina Bongers
- Institute of Ecological Science, Department of Animal Ecology, Vrije Universiteit, De Boelelaan 1085, NL-1081HV Amsterdam, The Netherlands.
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Mauser-Bunschoten EP, van der Bom JG, Bongers M, Twijnstra M, Roosendaal G, Fischer K, van den Berg HM. Purity of factor VIII product and incidence of inhibitors in previously untreated patients with haemophilia A. Haemophilia 2001; 7:364-8. [PMID: 11442640 DOI: 10.1046/j.1365-2516.2001.00513.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
It has been suggested that ultrapure clotting factor products carry a greater risk for inhibitor development in patients with haemophilia. We compared the incidence of inhibitors in 59 previously untreated patients (PUPs) with severe haemophilia (endogenous factor VIII < 0.01 U L-1) A, who were initially treated with cryoprecipitate or intermediate purified products, with that in 22 patients exclusively treated with monoclonally purified and recombinant factor VIII. Persistent inhibitors were those with 1 Bethesda unit per mL or more, on more than one occasion, combined with a decrease in recovery. Incidences of persistent inhibitors were 17% (10/59) for patients who were treated with cryoprecipitate or intermediate-purity products and 9% (2/10) for monoclonally purified and recombinant factor VIII. Transient inhibitors appeared to develop earlier during treatment with ultrapure products as compared to treatment with intermediate/low-purity products. In conclusion, ultrapure products appear not to carry a higher risk for inhibitor development.
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Bongers M. [Prostatitis]. Acta Urol Belg 1993; 61:161-73. [PMID: 8517235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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