93 results on '"Mesens, T."'
Search Results
2. Maternal venous Doppler characteristics are abnormal in pre-eclampsia but not in gestational hypertension
- Author
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Gyselaers, W., Staelens, A., Mesens, T., Tomsin, K., Oben, J., Vonck, S., Verresen, L., and Molenberghs, G.
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- 2015
- Full Text
- View/download PDF
3. Role of dysfunctional maternal venous hemodynamics in the pathophysiology of pre-eclampsia: a review
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Gyselaers, W., Mullens, W., Tomsin, K., Mesens, T., and Peeters, L.
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- 2011
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4. Reproducibility and repeatability of maternal venous Doppler flow measurements in renal interlobar and hepatic veins
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MESENS, T., TOMSIN, K., MOLENBERGHS, G., and GYSELAERS, W.
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- 2010
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5. Maternal renal interlobar vein impedance index is higher in early- than in late-onset pre-eclampsia
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GYSELAERS, W., MESENS, T., TOMSIN, K., MOLENBERGHS, G., and PEETERS, L.
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- 2010
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- View/download PDF
6. Ultrasound methods to distinguish between malignant and benign adnexal masses in the hands of examiners with different levels of experience
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Van Holsbeke, C., Daemen, A., Yazbek, J., Holland, T. K., Bourne, T., Mesens, T., Lannoo, L., De Moor, B., De Jonge, E., Testa, A. C., Valentin, L., Jurkovic, D., and Timmerman, D.
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- 2009
- Full Text
- View/download PDF
7. GESTATION-DEPENDANT INCREASE OF RENAL INTERLOBAR VENOUS IMPEDANCE INDEX IN PRE-ECLAMPSIA.
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Gyselaers, W, Van Holsbeke, C, Mesens, T, and Ombelet, W
- Published
- 2007
8. Late erosions of mid-urethral tapes for stress urinary incontinence—need for long-term follow-up?
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Mesens, T., Aich, A., and Bhal, P. S.
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- 2007
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9. Identification of peripartum near-miss for perinatal audit
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Kerkhofs, C., De Bruyn, C., Mesens, T., Theyskens, C., Vanhoestenberghe, M., Bruneel, E., Van Holsbeke, C., Bonnaerens, A., and Gyselaers, W.
- Subjects
metabolic acidosis ,Original Paper ,cerebral palsy ,instrumental delivery ,peripartum near-miss ,Perinatal audit ,perinatal asphyxia - Abstract
Introduction: Today, perinatal audit focuses basically on cases of perinatal mortality. In most centres in Western Europe, perinatal mortality is low. Identification of metabolic acidosis at birth may increase index cases eligible for evaluation of perinatal care, and this might improve quality of perinatal audit. The aim of this study is to assess the incidence of metabolic acidosis at birth in order to estimate its impact on perinatal audit. Patients and Methods: Cord blood was analysed for every neonate born between January 1, 2010 and December 31, 2012 in Ziekenhuis Oost-Limburg, Genk. Acidosis was defined as an umbilical arterial pH ≤ 7.05 with or without a venous pH ≤ 7.17. Respiratory acidosis (RA) was defined as acidosis with normal base excess, and metabolic acidosis (MA) was defined as acidosis with an arterial or venous base excess ≤ -10 mmol/L. In case of failed cord blood sampling, 5 minute Apgar score ≤ 6 was considered as the clinical equivalent of MA. Retrospective chart review of obstetric and paediatric files was performed for all cases of MA, together with review of paediatric follow-up charts from at least 6 months after birth. Perinatal asphyxia was defined as biochemical evidence for MA at birth, associated with early onset neonatal encephalopathy and long-term symptoms of cerebral palsy. Results: In a total of 6614 babies, perinatal death up to 7 days of life occurred in 40 babies (6.0‰). Acidosis was present in 183 neonates (2.8%), of which 130 (2.0%) had RA and 53 (0.8%) had MA. Of the 173 neonates with unknown pH values, 6 had Apgar scores ≤ 6. Of 59 babies born with MA or its clinical equivalent, 52 (88.1%) showed no neurologic symptoms at birth. Two (3.4%) died in the early neonatal period, one after abruptio placentae and one due to chorioamnionitis and severe prematurity. Five (8.5%) MA babies had symptoms of early onset neonatal encephalopathy, which recovered in three (5.1%), and persisted long-term in two others (3.4%). The two babies with cerebral palsy (prevalence 1/3300) were both born after instrumental vaginal delivery for foetal distress. Conclusion: In our study cohort, the incidence of perinatal mortality is 6‰. The incidence of metabolic acidosis is 9‰. Addition of cases of metabolic acidosis to those of mortality doubles index cases eligible for perinatal audit. The incidence of babies surviving with cerebral palsy after metabolic acidosis at birth is very low (0.3‰). Our results suggest that instrumental delivery for foetal distress might be a risk factor for metabolic acidosis with persisting neurologic dysfunction. Our study illustrates that identification of peripartum near-miss is useful for perinatal audit.
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- 2014
10. Identification of neonatal near miss by systematic screening for metabolic acidosis at birth
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Bonnaerens, A., Thaens, A., Mesens, T., Van Holsbeke, C., De Jonge, E.T.M., and Gyselaers, Wilfried
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Birth asphyxia ,metabolic acidosis ,neonatal care ,perinatal outcome ,perinatal audit ,Original Paper - Abstract
Aims: To evaluate the relevance of systematic screening for neonatal metabolic acidosis at birth as part of perinatal audit. Methods: For every baby, born in Ziekenhuis Oost Limburg, Genk Belgium between 1/1/2010 and 31/12/2010, cord blood was analysed to diagnose metabolic acidosis, defined as arterial or venous pH ≤ 7.05 or 7.17 respectively, in association with base excess of ≤ -10 mmol/L. Three observers identified indicators for suboptimal peripartal care with likely contribution to metabolic acidosis. In a multidisciplinary consensus meeting, these indicators were clas- sified into 5 categories : (a) fetal monitoring error (b) labour management error, (c) instrumental vaginal delivery for fetal distress within 2 h of second stage, (d) non-obstetric medical complications, (e) preterm births or accidental cases at term. Results: In a total of 2117 neonates, there were 11 intra-uterine, 1 intrapartum and 3 early neonatal deaths, bringing early perinatal mortality rate at 7.1‰. Metabolic acidosis was identified in 23 (1.1%) babies, of which 21 (91.3%) left hospital in good clinical condition. Two babies (0.9‰), born in category c, had chronic neurologic symptoms. Discussion: Systematic screening for neonatal metabolic acidosis caused a 2.5-fold increase of case identifications eligible for perinatal audit and opened perspectives towards rationalised improvement of perinatal care, in addition to the information obtained from cases of perinatal mortality. Next to indicators of perinatal mortality, perinatal audit programs should include neonatal metabolic acidosis as an extra parameter for quality assessment of perinatal care. Conclusion: Adding cases of near-miss neonatal morbidity to perinatal mortalities in perinatal audit programs increases opportunities for improvement of perinatal care.
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- 2011
11. Peripartumcardiomyopathie: een patiëntencasus en literatuuroverzicht
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Delattin P, Jan Bosteels, and Mesens T
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General Medicine - Published
- 2007
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12. Ultrasound methods to distinguish between malignant and benign adnexal masses in the hands of examiners with different levels of experience.
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Van Holsbeke, C, Daemen, A, Yazbek, J, Holland, Tk, Bourne, T, Mesens, T, Lannoo, L, De Moor, B, De Jonge, E, Testa, Antonia Carla, Valentin, L, Jurkovic, D, Timmerman, D., Van Holsbeke C, Daemen A, Yazbek J, Holland Tk, Bourne T, Mesens T, Lannoo L, De Moor B, De Jonge E, Testa, Antonia Carla (ORCID:0000-0003-2217-8726), Valentin L, Jurkovic D, Timmerman D., Van Holsbeke, C, Daemen, A, Yazbek, J, Holland, Tk, Bourne, T, Mesens, T, Lannoo, L, De Moor, B, De Jonge, E, Testa, Antonia Carla, Valentin, L, Jurkovic, D, Timmerman, D., Van Holsbeke C, Daemen A, Yazbek J, Holland Tk, Bourne T, Mesens T, Lannoo L, De Moor B, De Jonge E, Testa, Antonia Carla (ORCID:0000-0003-2217-8726), Valentin L, Jurkovic D, and Timmerman D.
- Abstract
OBJECTIVES: To determine the effect of an ultrasound training course on the performance of pattern recognition when used by less experienced examiners and to compare the performance of pattern recognition, a logistic regression model and a scoring system to estimate the risk of malignancy between examiners with different levels of experience. METHODS: Using ultrasound images of selected adnexal masses, two trainees classified the masses as benign or malignant by using pattern recognition both before and after they had attended a theoretical gynecological ultrasound course. They also classified the masses by using a logistic regression model and a scoring system, but only after they had attended the course. The performance of these three methods when they were used by the trainees was then compared with that when they were used by experts. RESULTS: One hundred and sixty-five adnexal masses were included, of which 42% were malignant (21% invasive tumors and 21% borderline tumors). The area under the receiver-operating characteristics curve of pattern recognition when used by the trainees was similar before and after they had attended the course. Training decreased sensitivity (84% vs. 70% for Trainee 1, P = 0.004; 70% vs. 61% for Trainee 2, P = 0.058) and increased specificity (77% vs. 92% for Trainee 1, P = 0.001; 89% vs. 95% for Trainee 2, P = 0.058). The performance of pattern recognition was poorer in the hands of the trainees than in the hands of the experts. The sensitivities of the logistic regression model were 70% and 54% for the trainees vs. 83% for an expert (P = 0.020 and < 0.001, respectively) and the specificities were 84% and 94% vs. 89% (P = 0.25 and 0.59, respectively). The sensitivities of the scoring system were 59% and 54% for the trainees vs. 75% for the expert (P = 0.002 and < 0.001, respectively), and the specificities were 90% and 93% vs. 85% (P = 0.103 and 0.008, respectively). CONCLUSION: Theoretical ultrasound teaching did not seem to improv
- Published
- 2009
13. Cardio-Venous Communication Time
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Tomsin, Kathleen, Mesens, T., Molenberghs, Geert, Peeters, L., Gyselaers, Wilfried, Tomsin, Kathleen, Mesens, T., Molenberghs, Geert, Peeters, L., and Gyselaers, Wilfried
- Abstract
Pregnancy induces major adaptations of the maternal cardiovascular system. Measurement of the time-interval between the maternal ECG and venous DW = Cardio-Venous Communication Time (CVCT) at the level of hepatic veins (HV) and renal interlobar veins (RIV) to (1) evaluate feasibility and sensibility of the combined ECG-DW methodology in hemodynamic studies (2) evaluate RIV and HV CVCT at different stages of gestation. (3) compare CVCT between Liver (L), Right Kidney (RK) and Left Kidney (LK). (4) compare RIV and HV CVCT between Normal Pregnancy (NP) and Pre-Eclampsia (PE).
- Published
- 2009
14. OP11.04: Comparison of the fetal fibronectin (Rapid fFN) and placental alpha microglobulin‐1 (PartoSure) tests for predicting imminent spontaneous preterm birth
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Van Holsbeke, C., primary, Dam, K., additional, Staelens, A., additional, Mesens, T., additional, and Corremans, A., additional
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- 2016
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15. Intraabdominal pressure in term pregnancy and postpartum
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Staelens, Anneleen S E, Van Cauwelaert, Stefan Eric, Tomsin, K., Mesens, T., Malbrain, Manu, Gyselaers, W., Emergency Medicine, Faculty of Medicine and Pharmacy, Supporting clinical sciences, and Intensive Care
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Medicine(all) ,intraabdominal pressure ,Postpartum Period ,pregnancy - Published
- 2013
16. Cardiovascular hemodynamics throughout normal pregnancy and postpartum as measured by impedance cardiography
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Tomsin, K, Oben, J, Staelens, A, Mesens, T, Molenberghs, Geert, Peeters, L, Gyselaers, W, TOMSIN, Kathleen, OBEN, Jolien, STAELENS, Anneleen, Mesens, Tinne, MOLENBERGHS, Geert, Peeters, Louis, and GYSELAERS, Wilfried
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cardiovascular hemodynamics ,hypertension in pregnancy ,imaging in Obs & Gyn ,impedance cardiography ,non-invasive ,postpartum ,prospective observational study - Abstract
Objective To evaluate the feasibility of non-invasive assessment of maternal cardiac and arterial characteristics throughout uncomplicated pregnancy and postpartum. Design A longitudinal evaluation throughout gestation, at seven weeks postpartum and at one year postpartum. Setting Antenatal outpatient clinic of Ziekenhuis Oost-Limburg (Genk, Belgium). Sample 16 women with uncomplicated pregnancy. Methods Impedance cardiography measurements were performed in supine, standing, and sitting position using a standard protocol with known reproducibility. SAS procedure MIXED for linear mixed models was used, and fitted to the data for each parameter separately: Data were binned in four-weekly intervals. Differences between gestational and postpartum measurements were evaluated by One-Sample Wilcoxon Signed Rank Tests. Data are presented as mean (standard error of mean). Main outcome measures Gestational and postnatal evolution of blood pressure, stroke volume, cardiac output, cardiac cycle time intervals, aortic flow characteristics, total peripheral vascular resistance, and thoracic fluid content. Results In all positions, stroke volume and cardiac output changed significantly throughout gestation (n=16; p≤0.0001), and supine values differed from standing (p≤0.008) and sitting positions (p≤0.048). As compared to early postpartum, all cardiovascular parameters remained unchanged after one year postpartum (n=12; p≥0.074), except for standing diastolic blood pressure which decreased with 5±2 mmHg (p=0.037). Conclusions Gestational evolutions of left ventricular output were similar to reported changes in literature, and were influenced by maternal position. Our study illustrates that impedance cardiography has the potential to become a useful tool in perinatal medicine to assess maternal hemodynamics The authors report that this study has not received any financial funding
- Published
- 2013
17. Understanding rising caesarean section trends: relevance of inductions and prelabour obstetric interventions at term
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Thaens, A., Bonnaerens, A., Martens, Geoffrey, Mesens, T., Van Holsbeke, C., De Jonge, E., and Gyselaers, Wilfried
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Caesarean section rate ,induction of labour ,obstetric management ,obstetrics ,reproductive and urinary physiology - Abstract
Aims: Single center 10-years audit on the relation between labour ward management and caesarean section rate, with special emphasis on the impact of reduced induction rate and the use of strict criteria for the diagnosis of onset of spontaneous labour and the indication for induction of labour. Methods: Retrospective classification of all deliveries between 1st January 2001 and 31st December 2010 in Ziekenhuis Oost Limburg, Genk Belgium, into the 10- group classification according to Robson. Numbers and rate of caesarean sections were defined for primiparous and multiparous women in spontaneous labour (groups 1 and 3 respectively), after induced labour (groups 2 and 4 respectively), with caesarean scar uterus (group 5) or with other gestational complications (groups 6 to 10). For these groups, a 10-years evolution was evaluated. Results: In a total of 19.675 deliveries, the overall caesarean section rate increased from 20% (380/1937) in 2001 to 25% (534/2121) in 2007 (p < 0.001), and decreased again to 20% in 2010 (415/2068) (p < 0.001). The increase of caesarean sections before 2007 was associated with an increase of inductions in singleton cephalic pregnancies at term from 28.5% (410/1437) in 2003 to 35.9% (551/1536) in 2006 (p < 0.001). The decrease of caesarean sections after 2007 occurred both in induced labours, as a direct consequence of rationalised reduction of induction rate, and in spontaneous labours, following introduction of strict criteria for diagnosis of labour. Despite a similar caesarean section rate of 20% in 2001 and 2010, the 6.6% (136/2068) repeat caesarean section rate in 2010 was higher than 4.2% (81/1937) in 2001 (p = 0.001). Conclusion: This single centre audit illustrates that increased induction rate is associated with increased caesarean section rate. This evolution can be reverted through a rationalised management aiming for reduction of induced labours and improved diagnosis of labour.
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- 2011
18. Doppler assessment of maternal central venous hemodynamics during uncomplicated pregnancy : a comprehensive review
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GYSELAERS, Wilfried, Mesens, T., TOMSIN, Kathleen, and Peeters, L.
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Doppler studies on hemodynamics of the cardiovascular system and intra-abdominal organ perfusion in non-pregnant individuals are usualy performed by cardiologists and radiologists. Specialists in Maternal-Fetal Medicine are also familiar with cardiovascular Doppler sonography, however they mostly focus on the fetal 1;2 or uteroplacental circulation 3-5. Recently, several reports have been published on Doppler assessment of the maternal venous compartment, illustrating its feasibility and repeatability 6-11. These studies have shown that the venous compartment is also subject to maternal cardiovascular adaptation during uncomplicated pregnancy 9;11. In gestational diseases, such as preeclampsia, some of the observations show promising results with respect to the evaluation of maternal cardiovascular maladaptation 9;11 and prediction of subsequent disease 12. Therefore, the maternal venous compartment is a new area to be explored in obstetric ultrasound imaging 13, in order to link Doppler observations to known features of gestational cardiovascular (patho)physiology 14-16 and to the information obtained from other parameters 17. This paper offers a comprehensive review on Doppler assessment of the maternal venous compartment during uncomplicated pregnancy.
- Published
- 2009
19. Ultrasound experience substantially impacts on diagnostic performance and confidence when adnexal masses are classified using pattern recognition
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Van Holsbeke, C, Daemen, A, Yazbek, J, Holland, Tk, Bourne, T, Mesens, T, Lannoo, L, Boes, A, Joos, A, Van De Vijver, A, Roggen, N, De Moor, B, De Jonge, E, Testa, Antonia Carla, Valentin, L, Jurkovic, D, Timmerman, D., Testa, Antonia Carla (ORCID:0000-0003-2217-8726), Van Holsbeke, C, Daemen, A, Yazbek, J, Holland, Tk, Bourne, T, Mesens, T, Lannoo, L, Boes, A, Joos, A, Van De Vijver, A, Roggen, N, De Moor, B, De Jonge, E, Testa, Antonia Carla, Valentin, L, Jurkovic, D, Timmerman, D., and Testa, Antonia Carla (ORCID:0000-0003-2217-8726)
- Abstract
AIM: To determine how accurately and confidently examiners with different levels of ultrasound experience can classify adnexal masses as benign or malignant and suggest a specific histological diagnosis when evaluating ultrasound images using pattern recognition. METHODS: Ultrasound images of selected adnexal masses were evaluated by 3 expert sonologists, 2 senior and 4 junior trainees. They were instructed to classify the masses using pattern recognition as benign or malignant, to state the level of confidence with which this classification was made and to suggest a specific histological diagnosis. Sensitivity, specificity, accuracy and positive and negative likelihood ratios (LR+ and LR-) with regard to malignancy were calculated. The area under the receiver operating characteristic curve (AUC) of pattern recognition was calculated by using six levels of diagnostic confidence. RESULTS: 166 masses were examined, of which 42% were malignant. Sensitivity with regard to malignancy ranged from 80 to 86% for the experts, was 70 and 84% for the 2 senior trainees and ranged from 70 to 86% for the junior trainees. The specificity of the experts ranged from 79 to 91%, was 77 and 89% for the senior trainees and ranged from 59 to 83% for the junior trainees. The experts were uncertain about their diagnosis in 4-13% of the cases, the senior trainees in 15-20% and the junior trainees in 67-100% of the cases. The AUCs ranged from 0.861 to 0.922 for the experts, were 0.842 and 0.855 for the senior trainees, and ranged from 0.726 to 0.795 for the junior trainees. The experts suggested a correct specific histological diagnosis in 69-77% of the cases. All 6 trainees did so significantly less often (22-42% of the cases). CONCLUSION: Expert sonologists can accurately classify adnexal masses as benign or malignant and can successfully predict the specific histological diagnosis in many cases. Whilst less experienced operators perform reasonably well when predicting the benign or malign
- Published
- 2010
20. Ultrasound Experience Substantially Impacts on Diagnostic Performance and Confidence when Adnexal Masses Are Classified Using Pattern Recognition.
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Van Holsbeke, C, Daemen, A., Yazbek, J, Holland, Tk, Bourne, T, Mesens, T, Lannoo, L, Boes, A, Joos, A, Van Der Vijver, A, Roggen, N, De Moor, B, De Jong, E, Testa, Antonia Carla, Valentin, L, Jurkovic, D, Timmerman, D., Testa, Antonia Carla (ORCID:0000-0003-2217-8726), Van Holsbeke, C, Daemen, A., Yazbek, J, Holland, Tk, Bourne, T, Mesens, T, Lannoo, L, Boes, A, Joos, A, Van Der Vijver, A, Roggen, N, De Moor, B, De Jong, E, Testa, Antonia Carla, Valentin, L, Jurkovic, D, Timmerman, D., and Testa, Antonia Carla (ORCID:0000-0003-2217-8726)
- Abstract
AIM: To determine how accurately and confidently examiners with different levels of ultrasound experience can classify adnexal masses as benign or malignant and suggest a specific histological diagnosis when evaluating ultrasound images using pattern recognition. METHODS: Ultrasound images of selected adnexal masses were evaluated by 3 expert sonologists, 2 senior and 4 junior trainees. They were instructed to classify the masses using pattern recognition as benign or malignant, to state the level of confidence with which this classification was made and to suggest a specific histological diagnosis. Sensitivity, specificity, accuracy and positive and negative likelihood ratios (LR+ and LR-) with regard to malignancy were calculated. The area under the receiver operating characteristic curve (AUC) of pattern recognition was calculated by using six levels of diagnostic confidence. RESULTS: 166 masses were examined, of which 42% were malignant. Sensitivity with regard to malignancy ranged from 80 to 86% for the experts, was 70 and 84% for the 2 senior trainees and ranged from 70 to 86% for the junior trainees. The specificity of the experts ranged from 79 to 91%, was 77 and 89% for the senior trainees and ranged from 59 to 83% for the junior trainees. The experts were uncertain about their diagnosis in 4-13% of the cases, the senior trainees in 15-20% and the junior trainees in 67-100% of the cases. The AUCs ranged from 0.861 to 0.922 for the experts, were 0.842 and 0.855 for the senior trainees, and ranged from 0.726 to 0.795 for the junior trainees. The experts suggested a correct specific histological diagnosis in 69-77% of the cases. All 6 trainees did so significantly less often (22-42% of the cases). CONCLUSION: Expert sonologists can accurately classify adnexal masses as benign or malignant and can successfully predict the specific histological diagnosis in many cases. Whilst less experienced operators perform reasonably well when predicting the benign or malign
- Published
- 2009
21. Impedance cardiography in uncomplicated pregnancy and pre-eclampsia: A reliability study
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Tomsin, K., primary, Mesens, T., additional, Molenberghs, G., additional, and Gyselaers, W., additional
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- 2012
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22. PP018 Cardiac reflex responses measured by impedance cardiography are different between low and high cardiac output pre-eclampsia
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Tomsin, K., primary, Mesens, T., additional, Oben, J., additional, Molenberghs, G., additional, Peeters, L., additional, and Gyselaers, W., additional
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- 2012
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23. OS095. Impedance cardiography: A straightforward and reliable tool to evaluate differences of cardiac reflex response between normal pregnancy and pre-eclampsia
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Tomsin, K., primary, Mesens, T., additional, Oben, J., additional, Molenberghs, G., additional, Peeters, L., additional, and Gyselaers, W., additional
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- 2012
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24. Time Interval Between Maternal Electrocardiogram and Venous Doppler Waves in Normal Pregnancy and Preeclampsia: A Pilot Study
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Tomsin, K., primary, Mesens, T., additional, Molenberghs, G., additional, Peeters, L., additional, and Gyselaers, W., additional
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- 2010
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25. A Case of Holoprosencephaly and 13q Deletion
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Mesens, T, primary, Witters, I, additional, Meylaerts, L, additional, and Fryns, J P, additional
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- 2009
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26. OC151: Pattern recognition by less experienced examiners and use of mathematical models to discriminate between static ultrasound images of benign and malignant adnexal masses
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Van Holsbeke, C., primary, Lannoo, L., additional, Mesens, T., additional, de Jonge, E., additional, Valentin, L., additional, Jurkovic, D., additional, Yazbek, J., additional, Holland, T., additional, Timmerman, D., additional, and Daemen, A., additional
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- 2008
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27. Type-specific orthostatic hemodynamic response of hypertensive diseases in pregnancy.
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Staelens AS, Vonck S, Mesens T, Tomsin K, Molenberghs G, and Gyselaers W
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- Adult, Cardiography, Impedance, Female, Gestational Age, Humans, Hypertension, Pregnancy-Induced diagnosis, Pregnancy, Supine Position, Hemodynamics, Hypertension, Pregnancy-Induced physiopathology, Posture physiology
- Abstract
Posture changes may differ between types of hypertensive disease. The aim is to evaluate the orthostatic response of impedance cardiography (ICG) measurements in uncomplicated and hypertensive pregnancies. Measurements were performed in supine and standing position in 202 women: 41 uncomplicated pregnancies (UP), 59 gestational hypertension (GH), 35 early-onset (EPE, < 34 weeks) and 67 late-onset (LPE, ≥ 34 weeks) preeclampsia were assessed. Measurements were recorded of heart rate, blood pressure, aortic flow parameters, cardiac output, pre-ejection period and left ventricular ejection time. Overall, orthostatic shifts were different between all groups (P < 0.001). UP was different from the hypertensive complicated gestations in the orthostatic change of the aortic acceleration. In contrast to patients with preeclampsia, those with GH had an increased blood pressure and Heather index, and stable pre-ejection period after posture change. EPE differed from LPE by change in blood pressure and aortic flow parameters. In addition to static ICG-measurements, orthostatic shifts improved group characterization from 57.4% to 65.8%. The orthostatic response is altered in hypertensive pregnancies. ICG measurements in the upright as well as during an orthostatic test might have the potential to improve the discriminative yield between hypertensive diseases in pregnancy., (© 2015 Wiley Publishing Asia Pty Ltd.)
- Published
- 2015
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28. Maternal venous hemodynamics assessment for prediction of preeclampsia should be longitudinal.
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Mesens T, Tomsin K, Oben J, Staelens A, and Gyselaers W
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- Adult, Female, Hepatic Veins physiopathology, Humans, Pregnancy, Prenatal Care methods, Renal Veins physiopathology, Ultrasonography, Doppler, Young Adult, Hemodynamics physiology, Hypertension, Pregnancy-Induced diagnostic imaging, Pre-Eclampsia diagnostic imaging, Pregnancy Complications diagnostic imaging
- Abstract
Objective: To address the question whether maternal venous abnormalities exist at the onset of, or develop during the course of pregnancy., Methods: We present five case reports of patients with early onset preeclampsia (EPE), late onset preeclampsia (LPE), gestational hypertension (GH), essential hypertension (EH) and an uncomplicated pregnancy (UP). Maternal renal and hepatic vein Doppler waves and maternal venous pulse transit times (VPTT) were assessed in early pregnancy and again shortly before delivery., Results: In all cases, maternal VPTT were normal in early pregnancy and changed to abnormal values in EPE and LPE, which was not true for UP and GH or EH., Conclusion: These observations support the view that venous hemodynamic dysfunction of preeclampsia (PE) develops during the course of pregnancy. Therefore, assessment of an individual's venous function for prediction of PE should be serial and longitudinal.
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- 2015
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29. Hepatic hemodynamics and fetal growth: a relationship of interest for further research.
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Vonck S, Staelens AS, Mesens T, Tomsin K, and Gyselaers W
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- Adult, Birth Weight, Cardiac Output physiology, Cardiography, Impedance, Demography, Female, Hepatic Veins physiology, Humans, Pregnancy, Pulse Wave Analysis, Biomedical Research, Fetal Development physiology, Hemodynamics physiology, Liver physiology
- Abstract
Background: It is well known that hepatic hemodynamics is an important physiologic mechanism in the regulation of cardiac output (CO). It has been reported that maternal cardiac output relates to neonatal weight at birth., Aims: In this study, we assessed the correlation between maternal hepatic vein Doppler flow parameters, cardiac output and neonatal birth weight., Methods: Healthy women with uncomplicated second or third trimester pregnancy attending the outpatient antenatal clinic of Ziekenhuis Oost-Limburg in Genk (Belgium), had a standardized combined electrocardiogram-Doppler ultrasound with Impedance Cardiography, for measurement of Hepatic Vein Impedance Index (HVI = [maximum velocity - minimum velocity]/maximum velocity), venous pulse transit time (VPTT = time interval between corresponding ECG and Doppler wave characteristics) and cardiac output (heart rate x stroke volume). After delivery, a population-specific birth weight chart, established from a cohort of 27000 neonates born in the index hospital, was used to define customized birth weight percentiles (BW%). Correlations between HVI, VPTT, CO and BW% were calculated using Spearman's ρ, linear regression analysis and R2 goodness of fit in SPSS 22.0., Results: A total of 73 women were included. There was a negative correlation between HVI and VPTT (ρ = -0.719, p < 0.001). Both HVI and VPTT correlated with CO (ρ = -0.403, p < 0.001 and ρ = 0.332, p < 0.004 resp.) and with BW% (ρ = -0.341, p < 0.003 and ρ = 0.296, p < 0.011 resp.)., Conclusion: Our data illustrate that the known contribution of hepatic hemodynamics in the regulation of cardiac output is also true for women with uncomplicated pregnancies. Our study is the first to illustrate a potential link between maternal hepatic hemodynamics and neonatal birth weight. Whether this link is purely associative or whether hepatic vascular physiology has a direct impact on fetal growth is to be evaluated in more extensive clinical and experimental research.
- Published
- 2014
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30. Maternal cardiovascular profiling in the first trimester of pregnancies complicated with gestation-induced hypertension or fetal growth retardation: a pilot study.
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Oben J, Tomsin K, Mesens T, Staelens A, Molenberghs G, and Gyselaers W
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- Adult, Cardiography, Impedance, Electrocardiography, Female, Humans, Pilot Projects, Pregnancy, Pregnancy Trimester, First, Prospective Studies, Ultrasonography, Doppler, Fetal Growth Retardation physiopathology, Hypertension, Pregnancy-Induced physiopathology
- Abstract
Objective: In this study, we determine whether maternal cardiovascular (CV) profiling can detect first trimester differences between women with uncomplicated pregnancies (UP) and those who will develop gestational hypertensive disorders (GHD) or normotensive fetal growth retardation (FGR)., Methods: Cardiac, arterial, and venous function were evaluated in 242 pregnant women around 12 weeks of gestation, using impedance cardiography (ICG) and combined electrocardiogram - Doppler ultrasonography. After postnatal determination of gestational outcome, first trimester measurements were compared between groups using Mann-Whitney U test for continuous data or Fisher's Exact test for categorical variables (SPSS 20.0)., Results: Compared to UP, first trimester aortic flow velocity index [71 ± 0.96 versus 61 ± 4.91 1/1000/s (p = 0.016)], acceleration index [133 ± 2.25 versus 106 ± 11.26 1/100/s(2) (p = 0.023)] and Heather index [23.1 ± 0.35 versus 19.2 ± 1.70 Ω/s(2) (p = 0.019)] were lower in GHD pregnancies, and first trimester stroke volume [77 ± 1.16 versus 67 ± 3.97 ml (p = 0.033)] and cardiac output [7.3 ± 0.10 versus 6.2 ± 0.31 l/min (p = 0.025)] were lower in FGR pregnancies., Conclusions: Maternal CV function in the first trimester of pregnancy differs between UP and those destined to develop GHD or FGR. This can be assessed with non-invasive maternal CV profiling, opening perspectives for the application of this technique in early gestational screening for GHD and FGR.
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- 2014
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31. Is there a correlation between maternal venous hemodynamic dysfunction and proteinuria of preeclampsia?
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Mesens T, Tomsin K, Staelens AS, Oben J, Molenberghs G, and Gyselaers W
- Subjects
- Adult, Birth Weight, Cross-Sectional Studies, Female, Gestational Age, Humans, Pre-Eclampsia urine, Pregnancy, Renal Veins diagnostic imaging, Ultrasonography, Doppler, Pre-Eclampsia physiopathology, Proteinuria etiology, Renal Veins physiopathology, Vascular Resistance
- Abstract
Objectives: To evaluate in early and late preeclampsia a correlation of maternal venous Doppler flow characteristics with biochemical parameters in maternal serum and urine, or with gestational outcome., Study Design: In this observational cross-sectional study, renal interlobar vein impedance index (RIVI) was measured according to a standardised protocol for combined electrocardiogram-Doppler ultrasonography in 86 women with uncomplicated pregnancy, 78 women with late onset preeclampsia (≥34w) and 67 with early onset preeclampsia (<34w). For each group, maternal age, pre-gestational BMI and parity were recorded together with birth weight and -percentile. For both early onset and late onset preeclampsia, maternal serum was analysed for thrombocyte count and concentrations of creatinine, ASAT, ALAT and uric acid and 24h urine collections were analysed for creatinine clearance and proteinuria (mg/24h). A non-parametric Mann-Whitney U-tests was performed for continuous data and a Fisher's exact tests for categorical data. Significant linear dependence between variables was identified using Pearson's correlation coefficient at nominal level a=0.05., Results: Proteinuria was higher in early onset than in late onset preeclampsia (1756mg [838-6116mg] versus 877mg [416-1696mg], p<0.001), and this was also true for RIVI in both left (0.45 [0.40-0.55] versus 0.41 [0.35-0.45], p=0.001) and right kidney (0.45 [0.39-0.55] versus 0.38 [0.30-0.43], p<0.001). In our data set, there was a significant correlation between proteinuria and RIVI of left (correlation coefficient=0.172, p=0.036) and right kidney (correlation coefficient=0.218, p=0.009) in late onset but not early onset preeclampsia., Conclusion: Maternal RIVI may correlate with proteinuria of late onset preeclampsia., (Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2014
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32. Intra-abdominal pressure measurements in term pregnancy and postpartum: an observational study.
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Staelens AS, Van Cauwelaert S, Tomsin K, Mesens T, Malbrain ML, and Gyselaers W
- Subjects
- Adult, Body Mass Index, Body Weight, Cesarean Section, Female, Humans, Hysterectomy, Vaginal, Pregnancy, Abdominal Cavity physiopathology, Intra-Abdominal Hypertension physiopathology
- Abstract
Objective: To determine intra-abdominal pressure (IAP) and to evaluate the reproducibility of IAP-measurements using the Foley Manometer Low Volume (FMLV) in term uncomplicated pregnancies before and after caesarean section (CS), relative to two different reference points and to non-pregnant values., Design: Observational cohort study., Setting: Secondary level referral center for feto-maternal medicine., Population: Term uncomplicated pregnant women as the case-group and non-pregnant patients undergoing a laparoscopic assisted vaginal hysterectomy (LAVH) as control group., Methods: IAP was measured in 23 term pregnant patients, before and after CS and in 27 women immediately after and 1 day after LAVH. The midaxillary line was used as zero-reference (IAPMAL) in all patients and in 13 CS and 13 LAVH patients, the symphysis pubis (IAPSP) was evaluated as additional zero-reference. Intraobserver correlation (ICC) was calculated for each zero-reference. Paired student's t-tests were performed to compare IAP values and Pearson's correlation was used to assess correlations between IAP and gestational variables., Main Outcome Measures: ICC before and after surgery, IAP before and after CS, IAP after CS and LAVH., Results: The ICC for IAPMAL before CS was lower than after (0.71 versus 0.87). Both mean IAPMAL and IAPSP were significantly higher before CS than after: 14.0±2.6 mmHg versus 9.8±3.0 mmHg (p<0.0001) and 8.2±2.5 mmHg versus 3.5±1.9 mmHg (p = 0.010), respectively. After CS, IAP was not different from values measured in the LAVH-group., Conclusion: IAP-measurements using FMLV is reproducible in pregnant women. Before CS, IAP is increased in the range of intra-abdominal hypertension for non-pregnant individuals. IAP significantly decreases to normal values after delivery.
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- 2014
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33. Incarceration of the gravid uterus: diagnosis and preoperative evaluation by magnetic resonance imaging.
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Dierickx I, Meylaerts LJ, Van Holsbeke CD, de Jonge ET, Martens IF, Mesens T, and Gyselaers WJ
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- Female, Humans, Labor Presentation, Magnetic Resonance Imaging, Pregnancy, Pregnancy Complications pathology, Pregnancy Complications surgery, Preoperative Period, Uterine Retroversion pathology, Uterine Retroversion surgery, Pregnancy Complications diagnosis, Uterine Retroversion diagnosis
- Abstract
Incarceration of the gravid uterus is a rare obstetric disorder that is often not recognized despite the ready availability of ultrasound. However, detailed imaging of the disturbed uterine and pelvic anatomy - from an obstetric point of view- is the key in reducing the potentially severe complications of this condition and planning its treatment. In this paper, we will describe the specific magnetic resonance imaging (MRI) features of an incarceration of the gravid uterus and we will discuss the role of magnetic resonance imaging in defining anatomy and in the medical decision whether to operate or not., (Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2014
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34. Improving the reliability of venous Doppler flow measurements: relevance of combined ECG, training and repeated measures.
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Staelens AS, Tomsin K, Oben J, Mesens T, Grieten L, and Gyselaers W
- Subjects
- Female, Humans, Image Interpretation, Computer-Assisted methods, Observer Variation, Reproducibility of Results, Sensitivity and Specificity, Blood Flow Velocity physiology, Cardiac-Gated Imaging Techniques methods, Image Enhancement methods, Pregnancy physiology, Ultrasonography, Doppler, Duplex methods, Veins diagnostic imaging, Veins physiology
- Abstract
The nature of venous Doppler waves is highly variable. An additional electrocardiogram (ECG) improves the interpretation of venous Doppler wave characteristics and allows measurement of venous pulse transit time. The purpose of this study was to assess the reproducibility of ECG-guided repeated measurements of venous Doppler flow characteristics before and after sonographer training and the inter- and intra-observer variability. In four groups of 25 healthy women, venous Doppler flow measurements were performed at the level of the kidneys and liver according to a standardized protocol. Intra-observer Pearson correlation coefficients of the renal interlobar vein Doppler indices were ≥ 0.80 with the addition of the ECG, which are higher than the results of a former study. The inter-observer correlation between an experienced ultrasonographer and an inexperienced ultrasonographer improved from ≥ 0.71 to ≥ 0.91 after training. The correlation range of all parameters between two independent observers improved when values were based on repeated measures. The addition of an ECG to the Doppler image, training and repeated measurements are helpful in improving venous Doppler wave interpretation., (Copyright © 2014 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2014
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35. Maternal venous hemodynamics in gestational hypertension and preeclampsia.
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Gyselaers W, Tomsin K, Staelens A, Mesens T, Oben J, and Molenberghs G
- Subjects
- Adult, Blood Pressure, Cardiography, Impedance, Cross-Sectional Studies, Echocardiography, Doppler, Female, Gestational Age, Hepatic Veins diagnostic imaging, Hepatic Veins physiopathology, Humans, Hypertension, Pregnancy-Induced diagnostic imaging, Hypertension, Pregnancy-Induced physiopathology, Hypertension, Pregnancy-Induced urine, Pre-Eclampsia diagnostic imaging, Pregnancy, Proteinuria urine, Pulse Wave Analysis, Renal Veins diagnostic imaging, Time Factors, Uric Acid blood, Uterine Artery diagnostic imaging, Uterine Artery physiopathology, Hemodynamics, Pre-Eclampsia physiopathology, Renal Veins physiopathology
- Abstract
Background: To evaluate characteristics of venous hemodynamics, together with cardiac and arterial function, in uncomplicated pregnancies (UP), non-proteinuric gestational hypertension (GH) and preeclampsia (PE)., Methods: In this observational cross-sectional study, venous hemodynamics was assessed using a standardised protocol for combined electrocardiogram (ECG)-Doppler ultrasonography, together with a non-invasive standardised cardiovascular assessment using impedance cardiography (ICG) in 13 women with UP, 21 with GH, 34 with late onset PE ≥ 34 w (LPE) and 22 with early onset PE < 34 w (EPE). ECG-Doppler parameters were impedance index at the level of hepatic veins (HVI) and renal interlobar veins (RIVI) together with venous pulse transit times (VPTT), as well as resistive and pulsatility index, and arterial pulse transit time (APTT) at the level of uterine arcuate arteries. ICG parameters were aortic flow velocity index (VI), acceleration index (ACI) and thoracic fluid content. Mann Whitney U-test, Kruskall-Wallis test and linear regression analysis with heteroskedastic variance was used for statistical analysis., Results: RIVI in both kidneys was >15% higher (P ≤ .010) in LPE and EPE, as compared to GH and UP. Next to this, >30% lower values for VI and ACI (P ≤ .029), and > 15% lower values for APTT (P ≤ .012) were found in GH, LPE and EPE, as compared to GH., Conclusion: In comparison to UP, similar abnormalities of central arterial function and APTT were found in GH, EPE and LPE. Proteinuria of LPE and EPE was associated with increased RIVI, this was not observed in GH.
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- 2014
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36. Non-invasive assessment of gestational hemodynamics: benefits and limitations of impedance cardiography versus other techniques.
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Staelens A, Tomsin K, Grieten L, Oben J, Mesens T, Spaanderman M, Jacquemyn Y, and Gyselaers W
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- Female, Humans, Monitoring, Physiologic, Pregnancy, Cardiography, Impedance methods, Hemodynamics physiology
- Abstract
To obtain data for maternal stroke volume and cardiac output during pregnancy, it is preferable to use a non-invasive, accurate and reproducible method. In this aspect, impedance cardiography is an excellent technique which is also highly accessible and easy to perform. This paper is a comprehensive review on the published literature about impedance cardiography and highlights the strengths and limitations of its applications in obstetrics.
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- 2013
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37. Characteristics of heart, arteries, and veins in low and high cardiac output preeclampsia.
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Tomsin K, Mesens T, Molenberghs G, Peeters L, and Gyselaers W
- Subjects
- Adult, Cardiac Output, High physiopathology, Cardiac Output, Low physiopathology, Cardiography, Impedance, Cohort Studies, Electrocardiography, Female, Humans, Pregnancy, Ultrasonography, Doppler, Blood Vessels physiopathology, Cardiac Output, Heart physiopathology, Pre-Eclampsia physiopathology
- Abstract
Objective: To assess the feasibility of non-invasive measurements of maternal cardiac output in relation to birth weight percentile and cardiovascular physiology in preeclampsia., Study Design: In a cohort of 62 women with preeclampsia, impedance cardiography was used to measure cardiac output and to evaluate heart and arteries. Venous characteristics were assessed by combined electrocardiogram-Doppler ultrasonography. Statistical differences were evaluated by Mann-Whitney U-tests., Results: Cardiac output correlated with birth weight percentile (P=.002), with more small for gestational age newborns in low cardiac output preeclampsia (<7.5L/min) than in high cardiac output preeclampsia (≥8.9L/min) (12/29 vs. 2/16, P=.044). This was associated with lower aortic flow indices and shorter venous pulse transit times in low than in high cardiac output preeclampsia., Conclusion: Non-invasive impedance cardiography measurements of maternal cardiac output correlate with birth weight percentile and are associated with different functionality of heart, arteries, and veins in low and high cardiac output preeclampsia., (Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.)
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- 2013
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38. Non-invasive cardiovascular profiling using combined electrocardiogram-Doppler ultrasonography and impedance cardiography: An experimental approach.
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Tomsin K, Vriens A, Mesens T, and Gyselaers W
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- Arteries diagnostic imaging, Cardiac Output physiology, Cardiography, Impedance methods, Electrocardiography methods, Female, Hemodynamics physiology, Humans, Posture physiology, Stroke Volume physiology, Valsalva Maneuver physiology, Young Adult, Arteries physiology, Cardiovascular Physiological Phenomena, Heart physiology, Ultrasonography, Doppler methods
- Abstract
In the present study, the feasibility of cardiovascular profiling using both combined electrocardiogram (ECG)-Doppler ultrasonography and impedance cardiography (ICG) was evaluated. Fourteen non-pregnant healthy women received 500 mL saline solution (NaCl 0.9% at 999 mL/h) intravenously by steady state infusion. Before and after this acute volume loading, we measured orthostatic-challenged cardiac and arterial characteristics using ICG and assessed venous characteristics by combined ECG-Doppler before and during the Valsalva manoeuvre. Changes are expressed as the mean ± SEM and were evaluated by the one-sample Wilcoxon signed-rank test. After volume loading, the observed fall in stroke volume after postural change from supine to standing decreased (-14 ± 3 vs -23 ± 2%; P = 0.011). Hepatic A wave velocity increased 63 ± 28% after volume loading (P = 0.007) and decreased during the Valsalva manoeuvre (-205 ± 21%; P = 0.001). Volume loading raised the thoracic fluid content index in both the supine and standing positions (7 ± 2% and 10 ± 1%, respectively; P ≤ 0.014). Combined ECG-Doppler ultrasonography and ICG enables the non-invasive identification of concomitant haemodynamic changes at the level of the heart, the arterial bed and the venous compartment. Our data support the view that non-invasive cardiovascular profiling is feasible, which seems particularly useful for the evaluation of patients who are not critically ill, such as pregnant women., (© 2013 Wiley Publishing Asia Pty Ltd.)
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- 2013
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39. PP070. Maternal cardiovascular profiling in the first trimester ofpregnancies complicated with gestation induced hypertension or fetal growth restriction.
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Oben J, Tomsin K, Staelens A, Mesens T, Molenberghs G, and Gyselaers W
- Abstract
Introduction: Maternal cardiovascular (CV) profiling is useful in the assessment of gestational hypertensive disorders (GHD)(1). The onset of GHD occurs during the first weeks of gestation(2)., Objective: To evaluate whether CV profiling can detect first trimester differences between women with uncomplicated pregnancies (UP) and those who will develop GHD or fetal growth restriction (FGR)., Methods: CV function was evaluated according to standardised protocols in 242 pregnant women around 12 weeks of gestation, using impedance cardiography (ICG) and combined ECG - Doppler ultrasonography. Outcome was evaluated after delivery and categorized as UP (n=218), GHD with or without proteinuria (n=13), and pregnancies complicated with FGR (n=11). Measurements were compared between groups using Mann-Whitney U test for continuous data or Fisher's Exact test for categorical variables., Results: As compared to UP, women destined to develop GHD showed increased systolic blood pressure, diastolic blood pressure and mean arterial pressure; and decreased ICG aortic velocity - and acceleration index. Pregnancies complicated with FGR showed decreased stroke volume and cardiac output when compared to UP. No differences were found concerning the maternal veins., Conclusion: First trimester maternal CV function differs between women with uncomplicated pregnancies and those destined to develop GHD or FGR. Non-invasive CV profiling enables the identification of these differences., (Copyright © 2013. Published by Elsevier B.V.)
- Published
- 2013
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40. PP078. The influence of maternal position on gestational hemodynamics.
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Tomsin K, Oben J, Staelens A, Molenberghs G, Mesens T, Peeters L, and Gyselaers W
- Abstract
Introduction: Cardiovascular profiling is useful for gestational hemodynamic studies. Conflicting results of cardiac output evolution from third trimester pregnancy to term are frequently reported., Objectives: To stress the effect of maternal position in the assessment of maternal cardiac and arterial parameters during normal pregnancy., Methods: Impedance cardiography measurements were executed during 16 normal pregnancies using a standard protocol with known reproducibility. Gestational evolution of stroke volume, cardiac output, cardiac cycle time intervals, aortic flow parameters and total peripheral vascular resistance was measured in supine, standing and sitting positions. SAS procedure MIXED for linear mixed models was used for each parameter separately., Results: Evolution of stroke volume and cardiac output in supine position differed from standing (p<0.01) and sitting positions (p<0.05). Next to this, pre-ejection period, left ventricular ejection time index, systolic time ratio and total peripheral vascular resistance also showed a different evolution between supine and standing positions (p<0.05); no differences were observed between standing and sitting positions (p⩾0.19)., Conclusion: Next to the frequently reported cardiac output, gestational evolutions of other pre-load dependent parameters are influenced by maternal position. This study shows the importance of a standardized protocol for the measurement of cardiovascular parameters in pregnancy., (Copyright © 2013. Published by Elsevier B.V.)
- Published
- 2013
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41. Validation of 3D power Doppler and VOCAL software in the sonographic assessment of hepatic venous flow.
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Claeskens J, Tomsin K, Molenberghs G, Van Holsbeke C, Mesens T, Meylaerts L, and Gyselaers W
- Abstract
Unlabelled: , Aim: To evaluate the reproducibility of three-dimensional power Doppler ultrasonography (3D-PDU) and the repeatability of Virtual Organ Computer-aided AnaLysis (VOCAL) software in the assessment of hepatic venous flow in ten healthy non-pregnant individuals., Methods: Visualization of hepatic veins was performed using both intra- and subhepatic approaches; These examinations were repeated twice. Vascular indices were obtained for each examination in a reference point using both small and large volume samples (3 times per type of volume sample). Intraclass Correlation Coefficients and Pearson's Product-Moment Correlation Coefficient were calculated to assess reproducibility and repeatability, respectively., Results: Intraclass Correlation Coefficients were more than 0.60 in small volumes, but variable in large volumes for both approaches. However, re-identification of the reference point failed in 30% using the subhepatic approach. Repeatability was high for all VOCAL analyses (Pearson's Product-Moment Correlation Coefficient > 0.98)., Conclusions: These results indicate reliable use of intrahepatic small volume samples in clinical application and invite to explore the role of this technology in the assessment of hepatic venous hemodynamics.
- Published
- 2013
42. Congenital High Airway Obstruction Syndrome (CHAOS) as part of Fraser syndrome: ultrasound and autopsy findings.
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Mesens T, Witters I, Van Robaeys J, Peeters H, and Fryns JP
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- Adult, Airway Obstruction congenital, Airway Obstruction diagnostic imaging, Autopsy, Female, Fraser Syndrome complications, Fraser Syndrome genetics, Humans, Pregnancy, Syndrome, Ultrasonography, Prenatal, Aborted Fetus pathology, Airway Obstruction pathology, Fraser Syndrome diagnosis
- Abstract
Congenital High Airway Obstruction Syndrome (CHAOS) is a potential lethal condition. We describe a case report of CHAOS, with additional malformations diagnosed at 20 weeks. Autopsy findings are suggestive for Fraser syndrome (cryptophthalmos-syndactyly syndrome; OMIM 219000). The diagnosis was confirmed by mutation analysis of FRAS1.
- Published
- 2013
43. Time interval between maternal electrocardiogram and venous Doppler waves in normal pregnancy and preeclampsia: a pilot study.
- Author
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Tomsin K, Mesens T, Molenberghs G, Peeters L, and Gyselaers W
- Subjects
- Adult, Cross-Sectional Studies, Female, Gestational Age, Humans, Pilot Projects, Pre-Eclampsia drug therapy, Pregnancy, Cardiac-Gated Imaging Techniques, Electrocardiography drug effects, Hepatic Veins diagnostic imaging, Image Interpretation, Computer-Assisted methods, Pre-Eclampsia diagnostic imaging, Renal Veins diagnostic imaging, Ultrasonography, Doppler, Duplex methods, Ultrasonography, Prenatal methods
- Abstract
Purpose: To evaluate the time interval between maternal electrocardiogram (ECG) and venous Doppler waves at different stages of uncomplicated pregnancy (UP) and in preeclampsia (PE)., Materials and Methods: Cross-sectional pilot study in 40 uncomplicated singleton pregnancies, categorized in four groups of ten according to gestational age: 10 - 14 weeks (UP1), 18 - 23 weeks (UP2), 28 - 33 weeks (UP3) and ≥ 37 weeks (UP4) of gestation. A fifth group of ten women with PE was also included. A Doppler flow examination at the level of renal interlobar veins (RIV) and hepatic veins (HV) was performed according to a standard protocol, in association with a maternal ECG. The time interval between the ECG P-wave and the corresponding A-deflection of the venous Doppler waves was measured (PA), and expressed relative to the duration of the cardiac cycle (RR), and labeled PA/RR., Results: In hepatic veins, the PA/RR is longer in UP 4 than in UP 1 (0.48 ± 0.15 versus 0.29 ± 0.09, p ≤ 0.001). When all UP groups were compared, the PA/RR increased gradually with gestational age. In PE, the HV PA/RR is shorter than in UP 3 (0.25 ± 0.09 versus 0.42 ± 0.14, p < 0.01) and this difference persisted under anti-hypertensive treatment (0.28 ± 0.06 versus 0.42 ± 0.14, p ≤ 0.01, n = 6). Similar results were found in both kidneys. In UP 1 but not in UP 3 or UP 4, the HV PA/RR is shorter in the liver than in the left and right kidney (0.29 ± 0.09 versus 0.38 ± 0.12, p < 0.01, and versus 0.36 ± 0.09, p ≤ 0.01)., Conclusion: The PA/RR is organ-specific and gestation-dependent, and is considered to relate to venous vascular tone and/or intravascular filling. Increased values at advanced gestational stages are consistent with known features of maternal cardiovascular adaptation. Shorter values in preeclampsia are consistent with maternal cardiovascular maladaptation mechanisms. Our pilot study invites more research of the relevance of the time interval between maternal ECG and venous Doppler waves as a new parameter for studying the gestational cardiovascular (patho)physiology of the maternal venous compartment by duplex sonography., (© Georg Thieme Verlag KG Stuttgart · New York.)
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- 2012
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44. Early neonatal complications from pulmonary arteriovenous malformations in hereditary hemorrhagic telangiectasia: case report and review of the literature.
- Author
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Gludovacz K, Vlasselaer J, Mesens T, Van Holsbeke C, Van Robays J, and Gyselaers W
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- Adult, Cardiovascular Abnormalities diagnosis, Cardiovascular Abnormalities pathology, Fatal Outcome, Female, Humans, Infant, Newborn, Infant, Newborn, Diseases pathology, Lung blood supply, Lung pathology, Male, Pregnancy, Pulmonary Artery pathology, Pulmonary Veins pathology, Cardiovascular Abnormalities complications, Infant, Newborn, Diseases etiology, Lung abnormalities, Pulmonary Artery abnormalities, Pulmonary Veins abnormalities
- Abstract
Hereditary hemorrhagic telangiectasia (HHT) is a rare but life-threatening disease characterized by multi system telangiectasias and arteriovenous malformations (AVM). Complications in adults have been reported extensively, but neonatal (NN) complications have only been published in incidental case reports. In this paper, we present a literature review on NN pulmonary AVM related to HHT, following our own experience with a NN death due to this disease. As prenatal diagnosis of pulmonary AVM is feasible, we recommend that a family history of HHT should be an indication for expertise prenatal anomaly scanning, in order to organise optimal NN support at birth.
- Published
- 2012
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45. Venous pulse transit time in normal pregnancy and preeclampsia.
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Tomsin K, Mesens T, Molenberghs G, and Gyselaers W
- Subjects
- Female, Humans, Linear Models, Longitudinal Studies, Pre-Eclampsia diagnostic imaging, Reference Values, Ultrasonography, Doppler, Color, Veins diagnostic imaging, Heart Rate physiology, Pre-Eclampsia physiopathology, Pregnancy physiology, Veins physiopathology
- Abstract
Uncomplicated pregnancies (n = 16) were evaluated longitudinally and compared to early- (n = 12) and late-onset (n = 14) preeclampsia patients, assessed once at diagnosis. Pulse transit time (PTT), equivalent to pulse wave velocity, was measured as the time interval between corresponding characteristics of electrocardiography and Doppler waves, corrected for heart rate, at the level of renal interlobar veins, hepatic veins, and arcuate branches of uterine arteries. Impedance cardiography was used to measure PTT at the level of the thoracic aorta. In normal pregnancy, all PTT increased gradually (P ≤ .01). Pulse transit time was shorter in late-onset preeclampsia (P < .05) and also in early-onset preeclampsia, with exception for hepatic veins and thoracic aorta (P > .05). Our results indicate that PTT is an easy and highly accessible measure for vascular reactivity at both arterial and venous sites of the circulation. Our observations correlate well with known gestational cardiovascular adaptation mechanisms. This suggests that PTT could be used as a new parameter in the evaluation and prediction of preeclampsia.
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- 2012
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46. Diurnal and position-induced variability of impedance cardiography measurements in healthy subjects.
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Tomsin K, Mesens T, Molenberghs G, and Gyselaers W
- Subjects
- Adult, Belgium, Electrocardiography, Female, Humans, Observer Variation, Predictive Value of Tests, Reference Values, Reproducibility of Results, Supine Position, Young Adult, Cardiography, Impedance, Circadian Rhythm, Dizziness physiopathology, Hemodynamics, Posture
- Abstract
Cardiovascular (CV) parameters and their measurements are subject to variation. In this study, we evaluated the reproducibility of impedance cardiography (ICG) measurements following orthostatic and diurnal challenges for a set of 22 CV parameters in ten randomly selected healthy nonpregnant women. A standard protocol was used to record a consecutive series of measurements for each parameter before and after three position changes. This series of measurements was performed twice (AM and PM sessions). For each parameter, measurement-shift following position change was evaluated at 5% cutoff and compared between sessions. Intra- and intersession intraclass correlation (ICC) was calculated for individual measurements per position using repeated-measures analysis of variance. Intra- and intersession Pearson's correlation coefficient (PCC) was calculated for mean values per position. Intersession correlation for measurement-shift following position change was 0·42 (5/12) for pressure parameters, whereas this was 0·96 (52/54) for other parameters. Inter- and intrasession ICC for individual measurements varied between 0·02 and 1 for all parameters, however inter- and intrasession PCC for mean values was consistently >0·80 for stroke volume (SV), stroke index (SI), cardiac output (CO), acceleration and velocity index (ACI and VI), thoracic fluid content (TFC), TFC index (TFCI) and heart period duration (HPD). We conclude that in healthy subjects under standardised conditions, reproducibility of means of multiple ICG measurements is high for SV, SI, CO, ACI, VI, TFC, TFCI and HPD. From our data, we cannot draw conclusions on trends in diseased subjects., (© 2010 The Authors. Clinical Physiology and Functional Imaging © 2010 Scandinavian Society of Clinical Physiology and Nuclear Medicine.)
- Published
- 2011
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47. Pericardial effusion in the first trimester of pregnancy.
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Witters I, Boshoff D, De Catte L, Mesens T, Gyselaers W, Theyskens C, Bruneel E, Gewillig M, and Fryns JP
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- Female, Humans, Pericardial Effusion etiology, Pregnancy, Pregnancy Complications, Cardiovascular etiology, Pregnancy Complications, Cardiovascular therapy, Pregnancy Outcome, Pregnancy Trimester, First, Ultrasonography, Prenatal, Pericardial Effusion diagnostic imaging, Pregnancy Complications, Cardiovascular diagnostic imaging
- Published
- 2011
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48. Understanding rising caesarean section trends: relevance of inductions and prelabour obstetric interventions at term.
- Author
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Thaens A, Bonnaerens A, Martens G, Mesens T, Van Holsbeke C, De Jonge E, and Gyselaers W
- Abstract
Aims: Single center 10-years audit on the relation between labour ward management and caesarean section rate, with special emphasis on the impact of reduced induction rate and the use of strict criteria for the diagnosis of onset of spontaneous labour and the indication for induction of labour., Methods: Retrospective classification of all deliveries between 1st January 2001 and 31st December 2010 in Ziekenhuis Oost Limburg, Genk Belgium, into the 10- group classification according to Robson. Numbers and rate of caesarean sections were defined for primiparous and multiparous women in spontaneous labour (groups 1 and 3 respectively), after induced labour (groups 2 and 4 respectively), with caesarean scar uterus (group 5) or with other gestational complications (groups 6 to 10). For these groups, a 10-years evolution was evaluated., Results: In a total of 19.675 deliveries, the overall caesarean section rate increased from 20% (380/1937) in 2001 to 25% (534/2121) in 2007 (p < 0.001), and decreased again to 20% in 2010 (415/2068) (p < 0.001). The increase of caesarean sections before 2007 was associated with an increase of inductions in singleton cephalic pregnancies at term from 28.5% (410/1437) in 2003 to 35.9% (551/1536) in 2006 (p < 0.001). The decrease of caesarean sections after 2007 occurred both in induced labours, as a direct consequence of rationalised reduction of induction rate, and in spontaneous labours, following introduction of strict criteria for diagnosis of labour. Despite a similar caesarean section rate of 20% in 2001 and 2010, the 6.6% (136/2068) repeat caesarean section rate in 2010 was higher than 4.2% (81/1937) in 2001 (p = 0.001)., Conclusion: This single centre audit illustrates that increased induction rate is associated with increased caesarean section rate. This evolution can be reverted through a rationalised management aiming for reduction of induced labours and improved diagnosis of labour.
- Published
- 2011
49. Recurrent incarceration and/or sacculation of the gravid uterus: a review.
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Dierickx I, Mesens T, Van Holsbeke C, Meylaerts L, Voets W, and Gyselaers W
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- Adult, Female, Humans, Pregnancy, Pregnancy Complications diagnosis, Uterine Diseases diagnosis, Pregnancy Complications etiology, Uterine Diseases complications
- Abstract
Retroverted uterine incarceration with sacculation of the anterior wall is reported to occur approximately in 1/3000 pregnancies. A literature search identified only one case report of incarceration of an anteflexed gravid uterus and six reported cases of recurrent incarceration and/or sacculation. We present a case of an incarceration of an anteflexed uterus in the first pregnancy, followed by a retroflexed incarceration in the second pregnancy. From this, a review is presented on recurrent uterine incarceration and/or sacculation.
- Published
- 2010
- Full Text
- View/download PDF
50. Ultrasound experience substantially impacts on diagnostic performance and confidence when adnexal masses are classified using pattern recognition.
- Author
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Van Holsbeke C, Daemen A, Yazbek J, Holland TK, Bourne T, Mesens T, Lannoo L, Boes AS, Joos A, Van De Vijver A, Roggen N, de Moor B, de Jonge E, Testa AC, Valentin L, Jurkovic D, and Timmerman D
- Subjects
- Adenocarcinoma, Mucinous diagnostic imaging, Adenocarcinoma, Mucinous epidemiology, Adenocarcinoma, Mucinous pathology, Adnexal Diseases epidemiology, Adnexal Diseases pathology, Databases, Factual, Female, Gynecology education, Humans, Models, Statistical, Neoplasms diagnostic imaging, Neoplasms epidemiology, Neoplasms pathology, Ovarian Neoplasms epidemiology, Ovarian Neoplasms pathology, ROC Curve, Reproducibility of Results, Risk Factors, Sensitivity and Specificity, Adnexal Diseases diagnostic imaging, Gynecology standards, Ovarian Neoplasms diagnostic imaging, Pattern Recognition, Automated standards, Ultrasonography, Doppler, Color standards
- Abstract
Aim: To determine how accurately and confidently examiners with different levels of ultrasound experience can classify adnexal masses as benign or malignant and suggest a specific histological diagnosis when evaluating ultrasound images using pattern recognition., Methods: Ultrasound images of selected adnexal masses were evaluated by 3 expert sonologists, 2 senior and 4 junior trainees. They were instructed to classify the masses using pattern recognition as benign or malignant, to state the level of confidence with which this classification was made and to suggest a specific histological diagnosis. Sensitivity, specificity, accuracy and positive and negative likelihood ratios (LR+ and LR-) with regard to malignancy were calculated. The area under the receiver operating characteristic curve (AUC) of pattern recognition was calculated by using six levels of diagnostic confidence., Results: 166 masses were examined, of which 42% were malignant. Sensitivity with regard to malignancy ranged from 80 to 86% for the experts, was 70 and 84% for the 2 senior trainees and ranged from 70 to 86% for the junior trainees. The specificity of the experts ranged from 79 to 91%, was 77 and 89% for the senior trainees and ranged from 59 to 83% for the junior trainees. The experts were uncertain about their diagnosis in 4-13% of the cases, the senior trainees in 15-20% and the junior trainees in 67-100% of the cases. The AUCs ranged from 0.861 to 0.922 for the experts, were 0.842 and 0.855 for the senior trainees, and ranged from 0.726 to 0.795 for the junior trainees. The experts suggested a correct specific histological diagnosis in 69-77% of the cases. All 6 trainees did so significantly less often (22-42% of the cases)., Conclusion: Expert sonologists can accurately classify adnexal masses as benign or malignant and can successfully predict the specific histological diagnosis in many cases. Whilst less experienced operators perform reasonably well when predicting the benign or malignant nature of the mass, they do so with a very low level of diagnostic confidence and are unable to state the likely histology of a mass in most cases., (Copyright 2009 S. Karger AG, Basel.)
- Published
- 2010
- Full Text
- View/download PDF
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