Complications of Synthetic Midurethral Slings: Is There a Relevant Discrepancy Between Observational Data and Clinical Trials?

CONTEXT

The complications of synthetic midurethral slings (MUSs) in women with stress urinary incontinence (SUI) have become a globally debated issue.

OBJECTIVE

To systematically review the short- and long-term complications of mesh slings reported in observational data compared with clinical trial data, to determine whether the complication rates from clinical trials reflects "real-world" observational data.

EVIDENCE ACQUISITION

PubMed and Cochrane Library were searched. Methods as detailed in Preferred Reporting Items for Systematic Reviews and Meta-analyses and Cochrane Handbook for Systematic Reviews of Interventions were followed.

EVIDENCE SYNTHESIS

Thirty registries/databases including 709 335 MUS procedures (1-22 yr of follow-up) were identified. MUS procedures were associated with intraoperative bladder perforation in 0.86-3.6%, urethral perforation in 0-0.1%, vascular injury in 0.04-0.1%, voiding lower urinary tract symptoms (LUTS) in 1.47-3.5%, vaginal exposure in 0.2-1.9%, and reoperation in up to 9% of cases. Forty-three randomised clinical trials were identified, including 6284 women who underwent MUS procedures and 2177 women who underwent other interventions (1-10 yr of follow-up). MUS procedures were associated with urinary tract perforation in 2.58%, vaginal injury in 1.43%, de novo voiding LUTS in 4.37%, de novo storage LUTS in 5.41%, mesh extrusion/exposure (vaginal/urinary tract) in 2.54%, dyspareunia in 2.26%, pain (pelvic/suprapubic/perineal) in 2.83%, and reoperation for complications required in 1.82% of cases. Meta-analyses of the randomised controlled trials revealed that retropubic MUSs were associated with more events of urinary tract perforation (risk ratio [RR] 9.81, 95% confidence interval [CI] 5.05-19.04, high certainty of evidence [COE]) and voiding LUTS (RR 1.57, 95% CI 1.19-2.07, high COE) than transobturator MUSs. MUSs were associated with more events of pain than mini-slings (RR 1.72, 95% CI 1.04-2.87, moderate COE).

CONCLUSIONS

Short- and long-term data on complications of polypropylene mesh used for female SUI are fairly comparable when using outcome data from well-designed clinical trials or from less structured prospective or retrospective registries. Comparisons have to be made with caution since the two systems of data collection are inherently incomparable. This knowledge should be incorporated in the discussion on how to implement polypropylene mesh for female stress incontinence.

PATIENT SUMMARY

In order to know whether mesh tapes used for treating stress incontinence work well and are safe, high-quality information is important. It appears that well-designed clinical studies give similar results to large registration databases. These data should be interpreted with caution in view of the different ways the information was collected. These results will help physicians and patients understand the risks of mesh tapes.

Vaginal Er:YAG laser application in the menopausal ewe model: a randomised estrogen and sham-controlled trial

OBJECTIVE

To describe effects of non-ablative erbium-doped:yttrium-aluminium-garnet (Er:YAG) laser on vaginal atrophy induced by iatrogenic menopause in the ewe.

DESIGN

Animal experimental, randomised, sham and estrogen-treatment controlled study with blinding for primary outcome.

SETTING

KU Leuven, Belgium.

SAMPLE

Twenty-four ewes.

METHODS

Menopause was surgically induced, after which the ewes were randomised to three groups receiving vaginal Er:YAG laser application three times, with a 1-month interval; three sham manipulations with a 1-month interval; or estrogen replacement and sham manipulations. At given intervals, ewes were clinically examined and vaginal wall biopsies were taken. Vaginal compliance was determined by passive biomechanical testing from explants taken at autopsy.

MAIN OUTCOME MEASURES

Vaginal epithelial thickness (primary), composition of the lamina propria (collagen, elastin, glycogen and vessel content), vaginal compliance, clinical signs.

RESULTS

Animals exposed to Er:YAG laser application and sham manipulation, but not to estrogens, displayed a significant and comparable increase in vaginal epithelial thickness between baseline and 7 days after the third application (69% and 67%, respectively, both P < 0.0008). In laser-treated ewes, temporary vaginal discharge and limited thermal injury were observed. Estrogen-substituted ewes displayed a more prominent increase in epithelial thickness (202%; P < 0.0001) and higher vaginal compliance (P < 0.05). None of the interventions induced changes in the lamina propria.

CONCLUSIONS

Vaginal Er:YAG laser has comparable effect to sham manipulation in menopausal ewes.

TWEETABLE ABSTRACT

Vaginal Er:YAG laser has comparable effect to sham manipulation in menopausal ewes #LASER #GSM #RCT.

Local Oestrogen for Pelvic Floor Disorders: A Systematic Review

OBJECTIVE

The decline in available oestrogen after menopause is a possible etiological factor in pelvic floor disorders like vaginal atrophy (VA), urinary incontinence (UI), overactive bladder (OAB) and pelvic organ prolapse (POP). This systematic review will examine the evidence for local oestrogen therapy in the treatment of these pelvic floor disorders.

EVIDENCE ACQUISITION

We performed a systematic search in MEDLINE, EMBASE, the Cochrane Central Register of Controlled Trials and the non-MEDLINE subset of PubMed from inception to May 2014. We searched for local oestrogens and VA (I), UI/OAB (II) and POP (III). Part I was combined with broad methodological filters for randomized controlled trials (RCTs) and secondary evidence. For part I and II two reviewers independently selected RCTs evaluating the effect of topical oestrogens on symptoms and signs of VA and UI/OAB. In part III all studies of topical oestrogen therapy in the treatment of POP were selected. Data extraction and the assessment of risk of bias using the Cochrane Risk of Bias Tool was undertaken independently by two reviewers.

EVIDENCE SYNTHESIS

The included studies varied in ways of topical application, types of oestrogen, dosage and treatment durations. Objective and subjective outcomes were assessed by a variety of measures. Overall, subjective and urodynamic outcomes, vaginal maturation and vaginal pH changed in favor of vaginal oestrogens compared to placebo. No obvious differences between different application methods were revealed. Low doses already seemed to have a beneficial effect. Studies evaluating the effect of topical oestrogen in women with POP are scarce and mainly assessed symptoms and signs associated with VA instead of POP symptoms.

CONCLUSION

Topical oestrogen administration is effective for the treatment of VA and seems to decrease complaints of OAB and UI. The potential for local oestrogens in the prevention as well as treatment of POP needs further research.

Four-defect repair in women with symptomatic anterior compartment prolapse: a large cohort study

INTRODUCTION AND HYPOTHESIS

We aimed to collect long-term follow-up data and report on both objective and subjective outcome, including morbidity, reinterventions, and sexual function following four-defect repair (FDR) as surgical correction of symptomatic anterior vaginal wall prolapse with or without stress urinary incontinence (SUI).

METHODS

Consecutive patients who underwent FDR between 1999 and 2005 were included in this study. We performed a retrospective analysis to evaluate anatomical and functional outcome by reviewing medical charts and sending validated questionnaires (Urogenital Distress Inventory and Defecatory Distress Inventory) to all patients. We also sent a self-developed, nonvalidated questionnaire to assess sexual function and inform the patient about reinterventions for pelvic floor dysfunction.

RESULTS

Two hundred and twenty-nine (60 %) of the 381 patients who underwent FDR participated. At a median follow-up of 40 months (range 5-88), 21 % of patients reported bothersome prolapse symptoms, and 11 % reported bothersome SUI. Temporary postoperative urinary retention occurred in 23 %. During follow-up, posterior vaginal wall prolapse was observed in 14 % of patients. Overall surgical reintervention rates were 15 % and 4 % for (all types of) pelvic organ prolapse and SUI, respectively; dyspareunia was reported by 30 %.

CONCLUSIONS

Functional cure rates of FDR as surgical treatment for anterior vaginal wall prolapse with or without SUI are satisfying. Nevertheless, given the negative side effects of FDR (urinary retention, high reintervention rate for posterior vaginal wall prolapse, high risk of sexual dysfunction), we question the superiority of FDR over standard anterior colporrhaphy in patients with anterior vaginal wall prolapse only.

Evaluation of the female pelvic floor in pelvic organ prolapse using 3.0-Tesla diffusion tensor imaging and fibre tractography

Objectives

To prospectively explore the clinical application of diffusion tensor imaging (DTI) and fibre tractography in evaluating the pelvic floor.

Methods

Ten patients with pelvic organ prolapse, ten with pelvic floor symptoms and ten asymptomatic women were included. A two-dimensional (2D) spin-echo (SE) echo-planar imaging (EPI) sequence of the pelvic floor was acquired. Offline fibre tractography and morphological analysis of pelvic magnetic resonance imaging (MRI) were performed. Inter-rater agreement for quality assessment of fibre tracking results was evaluated using weighted kappa (κ). From agreed tracking results, eigen values (λ1, λ2, λ3), mean diffusivity (MD) and fractional anisotropy (FA) were calculated. MD and FA values were compared using ANOVA. Inter-rater reliability of DTI parameters was interpreted using the intra-class correlation coefficient (ICC).

Results

Substantial inter-rater agreement was found (κ = 0.71 [95% CI 0.63–0.78]). Four anatomical structures were reliably identified. Substantial inter-rater agreement was found for MD and FA (ICC 0.60–0.91). No significant differences between groups were observed for anal sphincter, perineal body and puboperineal muscle. A significant difference in FA was found for internal obturator muscle between the prolapse group and the asymptomatic group (0.27 ± 0.05 vs 0.22 ± 0.03; P = 0.015).

Conclusion

DTI with fibre tractography permits identification of part of the clinically relevant pelvic structures. Overall, no significant differences in DTI parameters were found between groups.

Key Points

• Diffusion tensor MRI offers new insights into female pelvic floor problems.

• DTI allows 3D visualisation and quantification of female pelvic floor anatomy.

• DTI parameters from pelvic floor structures can be reliably determined.

• No significant differences in DTI parameters between groups with/without prolapse.

Comparing clean intermittent catheterisation and transurethral indwelling catheterisation for incomplete voiding after vaginal prolapse surgery: a multicentre randomised trial

OBJECTIVE

To compare clean intermittent catheterisation with transurethral indwelling catheterisation for the treatment of abnormal post-void residual bladder volume (PVR) following vaginal prolapse surgery.

DESIGN

Multicentre randomised controlled trial.

SETTING

Five teaching hospitals and one non-teaching hospital in the Netherlands.

POPULATION

All patients older than 18 years experiencing abnormal PVR following vaginal prolapse surgery, with or without the use of mesh. Exclusion criteria were: any neurological or anxiety disorder, or the need for combined anti-incontinence surgery.

METHODS

All patients were given an indwelling catheter directly after surgery, which was removed on the first postoperative day. Patients with a PVR of more than 150 ml after their first void were randomised for clean intermittent catheterisation (CIC), performed by nursing staff, or for transurethral indwelling catheterisation (TIC) for 3 days.

MAIN OUTCOME MEASURE

Bacteriuria rate at end of treatment.

RESULTS

A total of 87 patients were included in the study. Compared with the TIC group (n = 42), there was a lower risk of developing bacteriuria (14 versus 38%; P = 0.02) or urinary tract infection (UTI; 12 versus 33%; P = 0.03) in the CIC group (n = 45); moreover, a shorter period of catheterisation was required (18 hours CIC versus 72 hours TIC; P < 0.001). Patient satisfaction was similar in the two groups, and no adverse events occurred.

CONCLUSION

Clean intermittent catheterisation is preferable over indwelling catheterisation for 3 days in the treatment of abnormal PVR following vaginal prolapse surgery.

A new method to measure vaginal sensibility

INTRODUCTION

Vaginal surgery may affect sexual function both positively and negatively. Possibly, negative consequences of surgical interventions on sexuality may be caused by reduced sensibility of the vaginal wall.

AIMS

To develop a new method to measure vaginal sensibility.

METHODS

We developed a technique to measure the sensibility of the vaginal wall consisting of a St Marks electrode on a gloved index finger, with a stimulating electrode mounted at the tip. Measurements were performed in four different target areas (caudal and cranial, posterior and anterior) by two independent female researchers in a random order. Subjects were 12 healthy women.

RESULTS

The intra-observer reproducibility of both researchers was almost perfect (Pearsons-Rho correlation coefficient 0.77-0.96 < 0.001). The inter-observer reproducibility was moderate (Pearsons-Rho correlation coefficient 0.39-0.49). Both researchers measured increased sensibility in the cranial posterior vaginal wall relative to the cranial anterior vaginal wall, but for all measurements, researcher 2 obtained higher sensibility ratings than researcher 1. In addition, researcher 2 found a decreased sensibility in the cranial anterior vaginal wall for women not using oral contraceptives. Phase of the menstrual cycle did not influence vaginal sensibility.

CONCLUSION

We developed a new instrument to measure vaginal sensibility. The instrument has excellent intra-observer reproducibility. This method is sufficiently sensitive so as to differentiate between anterior and posterior cranial vaginal wall sensibility, but outcome differs as a function of researcher. Further evaluation of the clinical use of this method is needed, provided that measurements are performed by the same researcher.

A nationwide survey to measure practice variation of catheterisation management in patients undergoing vaginal prolapse surgery

INTRODUCTION AND HYPOTHESIS

Urinary catheterisation following vaginal prolapse surgery causes inconvenience for patients, risk of urinary tract infections and potentially longer hospitalisation. Possibly, practice variation exists concerning diagnosis and management of abnormal postvoid residual (PVR) volume implying suboptimal treatment for certain subgroups.

METHODS

Nationwide questionnaire-based survey.

RESULTS

Post-operatively, 77% performed transurethral indwelling catheterisation, 12% suprapubic catheterisation and 11% intermittent catheterisation. Catheterisation was applied 3 days (1-7 days) following anterior repair and 1 day (1-3 days) following all other procedures. The median cut-off point for abnormal PVR was 150 mL (range 50-250 mL). Treatment of abnormal PVR consisted mostly of prolonging transurethral indwelling catheterisation for 2 days (range 1-5 days; 57%), 29% by intermittent and 12% by suprapubic catheterisation. Antibiotics were administered by 21% either routinely or based on symptoms only.

CONCLUSIONS

Due to insufficient evidence and suboptimal implementation of available evidence, practice variation in catheterisation regimens is high.

Overall major histocompatibility complex class I expression is not downregulated in cervix cancer, as detected by immunoelectron microscopy

Downregulation of major histocompatibility complex (MHC) class I molecules in cervix cancer has been proposed as a mechanism for cancer cells to escape immunodetection. By means of light microscopic immunohistochemistry, it has been shown that in 20-70% of cervix cancers MHC class I is downregulated. We have reinvestigated this phenomenon by quantitative immunogold analysis of MHC class I labeling on the plasma membrane of cervix epithelial cells in ten human squamous cancers and ten normal human cervices. We have not found a statistically significant difference in MHC class I expression between normal and cancer cells. The difference with published light microscopic data probably reflects the higher morphologic resolution and quantifiable immunoreactivity of the immunoelectron microscopy.

Overall major histocompatibility complex class I expression is not downregulated in cervix cancer, as detected by immunoelectron microscopy

Downregulation of major histocompatibility complex (MHC) class I molecules in cervix cancer has been proposed as a mechanism for cancer cells to escape immunodetection. By means of light microscopic immunohistochemistry, it has been shown that in 20–70% of cervix cancers MHC class I is downregulated. We have reinvestigated this phenomenon by quantitative immunogold analysis of MHC class I labeling on the plasma membrane of cervix epithelial cells in ten human squamous cancers and ten normal human cervices. We have not found a statistically significant difference in MHC class I expression between normal and cancer cells. The difference with published light microscopic data probably reflects the higher morphologic resolution and quantifiable immunoreactivity of the immunoelectron microscopy.

Does mode of hysterectomy influence micturition and defecation?

OBJECTIVE

Hysterectomy may affect bladder and bowel function. A retrospective study was performed to compare the prevalence of micturition and defecation symptoms between different modes of hysterectomy.

METHODS

All pre-operatively asymptomatic patients, with uteral size < or =10 cm, who underwent hysterectomy between 1988 and 1997 were interviewed about the prevalence of micturition and defecation symptoms and the experienced physical and emotional limitations of these symptoms. Using logistic regression analysis, odds ratios (OR) were calculated for all symptoms of which the prevalence between modes of hysterectomy differed more than 10%. These odds ratios were adjusted for differences in other prognostic factors.

RESULTS

Vaginal hysterectomy was performed on 68 patients, total abdominal hysterectomy on 109 patients and subtotal abdominal hysterectomy on 50 patients. An increased prevalence of urge incontinence (adjusted OR 1.5 (95% CI 0.8-3.1)) and feeling of incomplete evacuation (adjusted OR 1.9 (95% CI 1.0-4.0)) was observed among patients who had undergone vaginal hysterectomy as compared to patients who had undergone total abdominal hysterectomy. The prevalence of urge incontinence (adjusted OR 1.8 (95% CI 0.8-4.2)) and difficulty emptying the rectum (adjusted OR 1.8 (95% CI 0.7-4.4)) was higher among patients who had undergone vaginal hysterectomy than among patients who had undergone subtotal abdominal hysterectomy. Statistically significant odds ratios were not observed. Relevant differences in physical and emotional limitations related to micturition and defecation symptoms were not observed between groups.

CONCLUSION

Our results suggest that technique of hysterectomy may influence the prevalence of micturition and defecation symptoms following hysterectomy.

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.

[The influence of urinary incontinence on quality of life of community-dwelling, 45-70 year old Dutch women]

OBJECTIVE

To establish the prevalence of urinary incontinence in non-institutionalized Dutch women and determine the consequences of urinary incontinence for their quality of life.

DESIGN

Cross sectional questionnaire survey.

METHOD

A random sample of 1905 women aged 45-70 years of the population of Zeist, the Netherlands, were sent a questionnaire. Generic quality of life was measured with the RAND-36 and disease specific quality of life was measured with a Dutch translation of the Urogenital Distress Inventory (UDI) and Incontinence Impact Questionnaire (IIQ). Based on the answers to the questionnaire four groups of women were formed: no incontinence, only stress, only urge or a combination of stress and urge incontinence. These 4 groups were compared as to questionnaire scores.

RESULTS

A total of 1086 questionnaires could be analysed. The prevalence of urinary incontinence was 57.1%: 28.7% stress incontinence, 5.6% urge incontinence and 22.7% both. Of those who reported urinary incontinence 6% were severely inconvenienced by it. Women with urinary incontinence reported a decrease in physical functioning and vitality as compared with women without incontinence (RAND-36). Especially women with urge or a combination of stress and urge incontinence had more severe impairment of their quality of life as compared to women with only stress incontinence.

CONCLUSION

The prevalence of urinary incontinence is higher than it is usually reported. Especially the urge component affects the quality of life in a negative way.