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Biomedical subjects

B W Mol

Publications and source records attributed to B W Mol.

At least 19 recordsLinked to original sources
PubMed2007

Does urodynamic investigation improve outcome in patients undergoing prolapse surgery?

AIMS: Without solid evidence, it has been advocated to perform urodynamic investigation in all patients scheduled for prolapse surgery. If urodynamic investigations were to be valuable in the diagnostic work-up, patients with normal and abnormal findings would have different treatment results. Our policy to never combine prolapse surgery and stress-incontinence surgery allowed us to study whether incontinence after surgery can be predicted from urodynamic investigation results. METHODS: A retrospective study was performed in consecutive patients undergoing vaginal prolapse surgery (anterior colporraphy and/or posterior colporraphy, and/or vaginal hysterectomy) between 2002 and 2004. All patients underwent pre-operative urodynamic investigation, including filling cystometry, urethral pressure profile measurement, and free flow cystometry. Data were collected from the files about medical history, findings at pelvic examination, findings at urodynamic investigation and presence of stress- and/or urge-incontinence after surgery. RESULTS: We studied 76 patients, of whom 5 (7%) patients reported stress-incontinence and 5 (7%) patients reported urge-incontinence after surgery. Findings at urodynamic investigation could not predict the presence of stress- or urge-incontinence after surgery. Likelihood ratios (LR) of prior presence of urge and stress-incontinence for the presence of post-operative urge- and stress-incontinence were 4.5 and 1.2, respectively. Of all findings at urodynamic investigation, only negative transmission during cough test was associated with presence of stress-incontinence (LR = 1.5). CONCLUSIONS: The prevalence of incontinence after prolapse surgery is low. None of the investigated parameters of the urodynamic investigation tests was associated with the presence of urinary incontinence after surgery.

Aged↗
PubMed2006

A systematic review of tests predicting ovarian reserve and IVF outcome.

The age-related decline of the success in IVF is largely attributable to a progressive decline of ovarian oocyte quality and quantity. Over the past two decades, a number of so-called ovarian reserve tests (ORTs) have been designed to determine oocyte reserve and quality and have been evaluated for their ability to predict the outcome of IVF in terms of oocyte yield and occurrence of pregnancy. Many of these tests have become part of the routine diagnostic procedure for infertility patients who undergo assisted reproductive techniques. The unifying goals are traditionally to find out how a patient will respond to stimulation and what are their chances of pregnancy. Evidence-based medicine has progressively developed as the standard approach for many diagnostic procedures and treatment options in the field of reproductive medicine. We here provide the first comprehensive systematic literature review, including an a priori protocolized information retrieval on all currently available and applied tests, namely early-follicular-phase blood values of FSH, estradiol, inhibin B and anti-Müllerian hormone (AMH), the antral follicle count (AFC), the ovarian volume (OVVOL) and the ovarian blood flow, and furthermore the Clomiphene Citrate Challenge Test (CCCT), the exogenous FSH ORT (EFORT) and the gonadotrophin agonist stimulation test (GAST), all as measures to predict ovarian response and chance of pregnancy. We provide, where possible, an integrated receiver operating characteristic (ROC) analysis and curve of all individual evaluated published papers of each test, as well as a formal judgement upon the clinical value. Our analysis shows that the ORTs known to date have only modest-to-poor predictive properties and are therefore far from suitable for relevant clinical use. Accuracy of testing for the occurrence of poor ovarian response to hyperstimulation appears to be modest. Whether the a priori identification of actual poor responders in the first IVF cycle has any prognostic value for their chances of conception in the course of a series of IVF cycles remains to be established. The accuracy of predicting the occurrence of pregnancy is very limited. If a high threshold is used, to prevent couples from wrongly being refused IVF, a very small minority of IVF-indicated cases (approximately 3%) are identified as having unfavourable prospects in an IVF treatment cycle. Although mostly inexpensive and not very demanding, the use of any ORT for outcome prediction cannot be supported. As poor ovarian response will provide some information on OR status, especially if the stimulation is maximal, entering the first cycle of IVF without any prior testing seems to be the preferable strategy.

Anti-Mullerian Hormone↗
PubMed2006

Is twin pregnancy necessarily an adverse outcome of assisted reproductive technologies?

It has recently been suggested that the measure of success of assisted reproductive technologies (ART) should be the birth of a singleton baby, whereas a twin pregnancy should be considered as a complication. Although the maternal and neonatal complications in twin pregnancies are significantly higher than those in singleton pregnancies, the classification of a twin pregnancy as a complication of ART is in our opinion debatable. Most twin pregnancies result in the birth of two healthy babies, with little or no complication for the mother, and only few twin pregnancies results in serious morbidity of the mother and of one or both of the children. The crux of our arguments is that one should consider those cases as poor outcomes and not a twin pregnancy per se.

Female↗
PubMed2005

Misoprostol versus curettage in women with early pregnancy failure: impact on women's health-related quality of life. A randomized controlled trial.

BACKGROUND: We aimed to compare patients' health-related quality of life after a misoprostol strategy to a curettage in women with early pregnancy failure after failed expectant management. METHODS: A multicentre randomized clinical trial was performed in The Netherlands. In all, 154 women with early pregnancy failure confirmed at ultrasonography who had been managed expectantly unsuccessfully for > or =1 week were randomly assigned to undergo either treatment with misoprostol (n=79) or curettage (n=75). The main outcome measures were health-related quality of life and satisfaction with treatment. RESULTS: In the misoprostol strategy 47% of the women needed additional curettage, as compared to 4% after curettage. In both groups, health-related quality of life was impaired most severely 2 days after treatment. In the misoprostol group, health-related quality of life was more severely impaired; after 2 days this was due to more pain and after 2 and 6 weeks this was due to a worse general health perception. Health-related quality of life was temporarily significantly more impaired in women in whom misoprostol failed as compared to women in whom misoprostol treatment was successful. In both treatment groups, an equal percentage of women (58%) would choose the same treatment in the future. In women treated with misoprostol, however, this choice depended on the initial success of misoprostol: in cases where misoprostol had caused complete evacuation, 76% of the women would opt for the same treatment, whereas only 38% of women who needed curettage after unsuccessful misoprostol would do so (P<0.01). CONCLUSION: Our study shows that, although both the misoprostol strategy and the curettage strategy resulted in complete evacuation in the end, women are willing to accept some disadvantages of misoprostol to avoid curettage. A treatment inconvenience using misoprostol is accepted as long as initial evacuation rate is high. This finding should be an integral part of counselling women when deciding upon management of early pregnancy failure.

Abortifacient Agents, Nonsteroidal↗
PubMed2004

Management of early pregnancy loss.

OBJECTIVES: In order to assess the available evidence on the management of early pregnancy loss, we performed a meta-analysis on the subject. METHODS: MEDLINE and EMBASE were searched for randomized studies reporting on the effectiveness of expectant management, misoprostol treatment or curettage. Outcomes considered were 'complete evacuation', complications, duration of bleeding, pain resulting from the procedure, side effects and women's satisfaction with the procedure. RESULTS: Thirteen studies were identified. Combined data in women with missed abortion managed expectantly or treated with misoprostol showed complete evacuation rates of 28% (49/173) (range 14-47%) and 81% (242/298) (range 60-83%), respectively. In women with incomplete abortion, these rates were 94% (31/33) (range 80-100%) and 99% (75/76) (range 99-100%), respectively. CONCLUSION: In the management of early pregnancy loss both expectant management and misoprostol treatment reduce the need for curettage, but misoprostol treatment seems to be more effective in women with missed abortion as compared to expectant management.

Abortifacient Agents, Nonsteroidal↗
PubMed2001

Distinguishing the benign and malignant adnexal mass: an external validation of prognostic models.

OBJECTIVE: Because external validation of the present models has not been reported, the purpose of the present study was to assess existing diagnostic models that are used to distinguish malignant from benign masses. METHODS: We tested the performance of existing models in a prospectively assembled data set of 170 patients with an adnexal mass. Twenty-one models that have been reported previously were assessed. The models were based on combinations of ultrasound findings, color Doppler tests, CA-125 measurement, age, and/or menopausal status. For each model, we constructed ROC curves and calculated an area under the ROC curve. RESULTS: Of the 170 adnexal masses that were operated on, 30 (18%) were malignant. The area under the ROC curve of 21 models that were externally validated varied between 0.69 and 0.90. We found the performance of the existing models to be inferior to the performance reported in the initial studies. Even models that incorporated multiple diagnostic tools and that were developed using logistic regression models or neural networks had an area under the ROC curve of 0.86 at maximum. In the case where we focused on almost perfect sensitivity, the highest specificities varied between 0.45 and 0.60. CONCLUSION: Although diagnostic models might be of value in the preoperative assessment of the adnexal mass, their diagnostic performance is not as good as that reported in the original publications.

Adnexal Diseases↗
PubMed2001

Cost-effectiveness of hysterosalpingography, laparoscopy, and Chlamydia antibody testing in subfertile couples.

OBJECTIVE: To evaluate the cost-effectiveness analysis of hysterosalpingography (HSG), laparoscopy, and Chlamydia antibody testing (CAT) in subfertile couples. DESIGN: Cost-effectiveness analysis. SETTING: Decision analytic framework. PATIENT(S): Data of >2,000 subfertile couples in the Canadian Infertility Treatment Evaluation Study. Results of CA-125 measurement and CAT were simulated from baseline characteristics. INTERVENTION(S): Expectant management was considered to be the reference strategy (strategy 1). In strategy 2 and 3, IVF was offered either immediately or after 2.5 years. In strategy 4, the decision to offer or delay treatment was based on the couple's chance of spontaneous conception. Nine strategies incorporated combinations of CAT, CA-125 measurement, HSG, and laparoscopy. MAIN OUTCOME MEASURE(S): Expected live birth rates, expected number of IVF cycles, and expected total costs. RESULT(S): The strategy starting with CAT was the most cost-effective in couples whose 3-year chance of conception was >14%, whereas the strategy starting with HSG was the most cost-effective in couples with worse fertility prospects. CONCLUSION(S): The diagnostic work-up to detect tubal pathology in subfertile couples should start with CAT in couples with relatively good fertility prospects and immediate HSG in couples with relatively poor fertility prospects.

Adult↗
PubMed2001

Vaginal vault suspension by abdominal sacral colpopexy for prolapse: a follow up study of 40 patients.

OBJECTIVES: Vaginal vault prolapse is a rare event after hysterectomy. Vaginal repair often results in a narrowed and shortened vagina with diminished function. Abdominal sacral colpopexy attaches the vaginal apex to the sacral promontory and restores the physiological position of the vagina. The objective of the study was to evaluate follow up results of the abdominal sacral colpopexy in 40 patients by a questionnaire and a gynaecologic examination. METHODS: We performed a cohort study. Between 1992 and 1998, 45 consecutive patients with a vaginal vault prolapse treated with an abdominal sacral colposcopy were included. RESULTS: Forty patients were included in the study. No serious complications occurred during surgery. Two patients per- or postoperative hemorrhage required blood transfusion. In two patients, one with a concomittant hysterectomy, the Gore-tex graft infected within 3 months after the operation. If vaginal 'protrusion' was the only preoperative complaint, in 93% (13/14) of the cases, surgery resulted in a condition without any complaint, related to the vaginal prolapse. If initially a combination of complaints (vaginal protrusion, urinary incontinence, defecation problems, sexual dysfunction) was the reason for surgery, only ten of 27 (37%) patients were symptom-free at follow up (P=0.002, Yates corrected). In the whole group 34 (85%) patients noticed before the operation a feeling of vaginal protrusion. At follow-up, 23 patients (56%) had no symptoms at all that could be related to the vaginal prolapse. Problems concerning defecation, like constipation were present before surgery in eight patients. In six of them, these complaints were resolved after surgery. However, in five patients de novo constipation developed after surgery. There were no cases of de novo urinary incontinence. At gynaecological examination in three patients, the vaginal vault prolapse recurred within the follow-up period, accounting for a success rate of 93%. In ten more patients a moderate enterorectocele developed or persisted. No reoperations were performed for that reason. CONCLUSIONS: Abdominal sacral colpopexy is a safe and efficacious treatment of the posthysterectomy vaginal vault prolapse. To prevent the persistence or development of an enterorectocele, a culdoplasty according to Halban or McCall might possibly be helpful. Peritonisation of the graft seems not to be necessary. The use of banked collagen tissue as graft material is promising and needs further investigation.

Adult↗
PubMed2001

Non-invasive management of patients with suspected ectopic pregnancy: a survey among Dutch gynaecologists.

OBJECTIVE: To investigate if implementation of a non-invasive diagnostic work up of patients with suspected ectopic pregnancy, involving transvaginal sonography and serum human chorionic gonadotrophin (hCG) measurement decreases the likelihood of performing diagnostic laparoscopies. STUDY DESIGN: We interviewed 27 Dutch gynaecologists using 16 structured case summaries in a fractional factorial design. Each case summary concerned a hypothetical patient with suspected ectopic pregnancy. For each case presentation, the gynaecologists were asked for their inclination to perform laparoscopy. RESULTS: There were substantial differences in the degree to which data from a non-invasive work-up influenced the decision to perform a laparoscopy. Some gynaecologists would perform laparoscopy in all 16 patients at the first visit, whereas others would initially admit none of them. CONCLUSION: Dutch gynaecologists seem to be familiar with a non-invasive diagnostic approach in women with suspected ectopic pregnancy. However, there are considerable differences in management approach probably due to individual variability in weighing the risks and benefits of expectant management.

Chorionic Gonadotropin↗
PubMed2001

Is platinum-based chemotherapy with paclitaxel effective in optimally debulked patients with advanced ovarian cancer?

OBJECTIVE: Suboptimally debulked patients with advanced ovarian cancer who are treated with a combination of cisplatin plus paclitaxel (TP therapy) have a better survival as compared to patients treated with a combination of cisplatin plus cyclophosphamide (CP therapy), but this advantage has not been demonstrated in optimally debulked patients. We performed a retrospective study to compare the effectiveness of TP therapy and CP therapy in optimally debulked patients. STUDY DESIGN: From 1991 to 1996, 87 consecutive patients with advanced ovarian cancer treated in the University Hospital Utrecht and the St. Antonius Hospital were included in the study. Overall survival (OS) of patients treated with TP or CP were compared. Multivariable Cox-regression analysis was used to calculate a hazard rate ratio (HRR) for OS. RESULTS: In the study period, 51 patients were treated with CP, and 36 patients were treated with TP. In the 18 patients with a tumorrest >2cm, there was a clear, but not statistically significant benefit from TP. In 69 patients with a tumorrest <or=2cm, life expectancy was not increased in patients treated with TP as compared to patients treated with CP (HRR 0.9 (95% CI 0.4-1.9)). CONCLUSION: We could not show that ovarian cancer patients with residual disease of <or=2cm who were treated with TP had better survival as compared to patients who were treated with CP. Taking into account the high costs of treatment with TP, a randomized trial comparing the effects of TP therapy and CP therapy in optimally debulked patients is warranted.

Adult↗
PubMed2001

The accuracy of lamellar body count and lecithin/sphingomyelin ratio in the prediction of neonatal respiratory distress syndrome: a meta-analysis.

OBJECTIVE: To compare the performance of the lecithin/sphingomyelin ratio and the lamellar body count in the prediction of neonatal respiratory distress syndrome. DESIGN: Meta-analysis. SAMPLE: Six studies reporting on the performance of both the lecithin/sphingomyelin ratio and the lamellar body count published between January 1966 and August 1999. METHODS: We performed a computerised MEDLINE search to identify articles published on the subject. For the six selected studies, prevalence of respiratory distress syndrome and sensitivity and specificity of the tests in the prediction of respiratory distress syndrome were calculated, and overall performance was assessed by constructing summary receiver-operating characteristic curves. RESULTS: The constructed summary receiver-operating characteristic curves showed the lamellar body count to perform slightly better than the lecithin/sphingomyelin ratio in the prediction of respiratory distress syndrome (P= 0.13). CONCLUSIONS: Since the lamellar body count can be performed quickly and since it is less expensive than the lecithin/sphingomyelin ratio, we recommend the former as the test of first choice in the assessment of fetal lung maturity.

Amniotic Fluid↗
PubMed2000

The accuracy of endometrial sampling in the diagnosis of patients with endometrial carcinoma and hyperplasia: a meta-analysis.

BACKGROUND: Endometrial assessment by means of biopsy or sampling of endometrial cells is a minimally invasive alternative for dilatation and curettage (D&C) or hysteroscopy. The use of this technique is believed to reduce the cost of the diagnostic work-up for abnormal uterine bleeding without reducing accuracy. Because the authors were not aware of any systematic review of this test, they performed a meta-analysis to assess the accuracy of endometrial sampling devices in the detection of endometrial carcinoma and atypical hyperplasia. METHODS: The authors searched the literature for studies published between 1966 and 1999 comparing the results of endometrial sampling with findings at D&C, hysteroscopy, and/or hysterectomy. They found 39 studies that included 7914 women. For each study, the fraction of patients was calculated in which endometrial sampling failed. Furthermore, the authors calculated the fraction of cases of endometrial carcinoma and atypical hyperplasia that were identified correctly as well as the fraction of women in whom these diseases were diagnosed false positively. RESULTS: The detection rate for endometrial carcinoma was higher in postmenopausal women compared with premenopausal women. In both postmenopausal and premenopausal women, the Pipelle was the best device, with detection rates of 99. 6% and 91%, respectively. For the detection of atypical hyperplasia, there was only one study that reported explicitly on postmenopausal women, thereby hampering the possibility of subgroup analysis. Again, the Pipelle was the most sensitive technique with a sensitivity of 81%. The specificity of all devices was > 98%. CONCLUSIONS: Endometrial biopsy with the Pipelle is superior to other endometrial techniques in the detection of endometrial carcinoma and atypical hyperplasia. The accuracy of the Pipelle is higher in postmenopausal women compared with premenopausal women.

Endometrial Hyperplasia↗