Mary Anna Denman

Vaginal birth after cesarean: New insights on maternal and neonatal outcomes

OBJECTIVE: To systematically review the evidence about maternal and neonatal outcomes relating to vaginal birth after cesarean (VBAC). DATA SOURCES: Relevant studies were identified from multiple searches of MEDLINE, DARE, and the Cochrane databases (1980 to September 2009) and from recent systematic reviews, reference lists, reviews, editorials, Web sites, and experts. METHODS OF STUDY SELECTION: Inclusion criteria limited studies to the English-language and human studies conducted in the United States and developed countries specifically evaluating birth after previous cesarean delivery. Studies focusing on high-risk maternal or neonatal conditions, including breech vaginal delivery, or fewer than 10 patients were excluded. Poor-quality studies were not included in analyses. TABULATION, INTEGRATION, AND RESULTS: We identified 3,134 citations and reviewed 963 articles for inclusion; 203 articles met the inclusion criteria and were quality rated. Overall rates of maternal harms were low for both trial of labor and elective repeat cesarean delivery. Although rare in both elective repeat cesarean delivery and trial of labor, maternal mortality was significantly increased for elective repeat cesarean delivery at 0.013% compared with 0.004% for trial of labor. The rates of maternal hysterectomy, hemorrhage, and transfusions did not differ significantly between trial of labor and elective repeat cesarean delivery. The rate of uterine rupture for all women with prior cesarean was 0.30%, and the risk was significantly increased for trial of labor (0.47% compared with 0.03% for elective repeat cesarean delivery). Perinatal mortality was also significantly increased for trial of labor (0.13% compared with 0.05% for elective repeat cesarean delivery). CONCLUSION: Overall the best evidence suggests that VBAC is a reasonable choice for the majority of women. Adverse outcomes were rare for both elective repeat cesarean delivery and trial of labor. Definitive studies are lacking to identify patients who are at greatest risk for adverse outcomes.

Reoperation 10 years after surgically managed pelvic organ prolapse and urinary incontinence.

OBJECTIVE This study measured the 10-year risk of reoperation for surgically treated pelvic organ prolapse and urinary incontinence (POPUI) in a community population. STUDY DESIGN We conducted a prospective cohort analysis of 374 women who were > 20 years old and who underwent surgery for POPUI in 1995. RESULTS The 10-year reoperation rate was 17% by Kaplan Meier analysis. Previous POPUI surgery at the time of index surgery conferred a hazard ratio of 1.9 (95% CI, 1.1-3.2; P = .018). The abdominal approach was protective against reoperation compared with the vaginal approach (hazard ratio, 0.37; 95% CI, 0.17-0.83; P = .02) With the use of Cox regression, no association was observed for age, vaginal parity, previous hysterectomy, body mass index, prolapse severity, ethnicity, chronic lung disease, smoking, estrogen status, surgical indication, or anatomic compartment. CONCLUSION A reoperation rate of 17% is unacceptably high and likely represents an underestimate of the true rate. Most of the factors that influence reoperation have not yet been identified.

New Insights on Vaginal Birth After Cesarean: Can It Be Predicted?

OBJECTIVE: To evaluate existing vaginal birth after cesarean (VBAC) screening tools and to identify additional factors that may predict VBAC or failed trial of labor. DATA SOURCES: Relevant studies were identified through MEDLINE, Database of Abstracts of Reviews of Effectiveness, and the Cochrane databases (1980-September 2009), and from recent systematic reviews, reference lists, reviews, editorials, web sites, and experts. METHODS OF STUDY SELECTION: Inclusion criteria limited studies to those of humans, written in English, studies conducted in the United States and developed countries, and those rated good or fair quality by the U.S. Preventive Services Task Force criteria. Studies of individual predictors were combined using a random effects model when the estimated odds ratios were comparable across included studies. TABULATION, INTEGRATION, AND RESULTS: We identified 3,134 citations and reviewed 963 papers, of which 203 met inclusion criteria and were quality-rated. Twenty-eight provided evidence on predictors of VBAC and 16 presented information on scored models for predicting VBAC (or failed trial of labor). Six of the 11 scored models for predicting VBAC (or failed trial of labor) were validated by separated dataset, cross-validation, or both. Whereas accuracy remained high across all models for predicting VBAC, with predictive values ranging from 88% to 95%, accuracy for predicting failed trial of labor was low, ranging from 33% to 58%. Individual predictors including Hispanic ethnicity, African-American race, advanced maternal age, no previous vaginal birth history, birth weight heavier than 4 kg, and use of either augmentation or induction were all associated with reduced likelihood of VBAC. CONCLUSION: Current scored models provide reasonable predictability for VBAC, but none provides consistent ability to identify women at risk for failed trial of labor. A scoring model is needed that incorporates known antepartum factors and can be adjusted for current obstetric factors and labor patterns if induction or augmentation is needed. This would allow women and clinicians to better determine individuals most likely to require repeat cesarean delivery.

Mesh erosion in robotic sacrocolpopexy.

Objective This study aimed to compare the incidence of mesh erosion after robotic sacrocolpopexy between women undergoing total and those undergoing supracervical hysterectomy (SH). Methods This is a retrospective cohort study of women who underwent sacrocolpopexy and concomitant hysterectomy using the DaVinci surgical robot between May 2007 and December 2010 at 2 sites. Baseline data were gathered before surgery. The primary outcome was mesh erosion identified during 3 months of follow-up. Results A total of 102 women underwent sacrocolpopexy, of whom 45 were with concomitant SH and 57 were with total hysterectomy (TH). Their mean age was 58 years, mean body mass index was 26.8 kg/m2, 98% were white, 6% smoked, and 25% were on systemic hormone replacement therapy. Mean preoperative Ba = +1.4, C = −2.2. These were not different between the 2 groups or by site. Within 3 months of surgery, mesh erosion was diagnosed in 8 women, all of whom had TH. No mesh erosions occurred in the SH group (14% vs 0%). Total hysterectomy mesh erosion rate at site 1 was 3% compared with 37% at site 2. Mesh type was the only identifiable difference between sites: self-cut polypropylene at site 1, precut polypropylene at site 2. Two women in the SH had abnormal uterine pathology: 1 endometrial adenocarcinoma and 1 focus of hyperplasia with atypia. Conclusions No mesh erosions were associated with SH within the first 3 months. In TH, the graft material used may be a modifiable factor needing further investigation. Unexpected abnormal uterine pathologic diagnosis remains a possibility with SH. Longer-term follow-up and a randomized trial are warranted to answer these questions.

Vaginal birth after cesarean: an effective method to reduce cesarean.

Cesarean deliveries represent almost one third of US births. Given that repeat cesarean is the most common single indication for cesarean, trial of labor after cesarean (TOLAC) with subsequent vaginal birth after cesarean (VBAC) is an important mechanism to reduce the overall cesarean rate. The 2010 National Institutes of Health Conference found that one of the biggest barriers to VBAC is the lack of patient access to TOLAC. Many women who currently deliver by repeat cesarean would be candidates for a TOLAC. This manuscript will summarize the evidence on VBAC to help clinicians identify candidates, provide evidence-based counseling, and guide management of TOLAC.

Trial of Labor and Vaginal Delivery Rates in Women with a Prior Cesarean

OBJECTIVE To evaluate evidence on trial of labor (TOL) and vaginal delivery rates in women with a prior cesarean and to understand the characteristics of women offered a trial of labor. DATA SOURCES MEDLINE, DARE, and Cochrane databases were searched for articles evaluating mode of delivery for women with a prior cesarean delivery published between 1980 and September 2009. STUDY SELECTION Studies were included if they involved human participants, were in English, conducted in the United States or in developed countries, and if they were rated fair or good base on U.S. Preventive Services Task Force (USPSTF) criteria. DATA EXTRACTION AND SYNTHESIS The search yielded 3,134 abstracts: 69 full-text papers on TOL and vaginal birth after cesarean (VBAC) rates and 10 on predictors of TOL. The TOL rate in U.S. studies was 58% (95% CI [52, 65]) compared with 64% (95% CI [59, 70]) in non U.S. STUDIES The TOL rate in the U.S. was 62% (95% CI [57, 66]) for studies completed prior to 1996 and dropped to 44% (95% CI [34, 53]) in studies launched after 1996, p = .016. In U.S. studies, 74% (95% CI [72, 76]) of women who had a TOL delivered vaginally. Women who had a prior vaginal birth or delivered at a large teaching hospital were more likely to be offered a TOL. CONCLUSIONS Although the TOL rate has dropped since 1996, the rate of vaginal delivery after a TOL has remained constant. Efforts to increase rates of TOL will depend on patients understanding the risks and benefits of both options. Maternity providers are well positioned to provide key education and counseling when patients are not informed of their options.

Bladder pain syndrome: a review.

OBJECTIVE : Bladder pain syndrome (BPS), including the specific variant interstitial cystitis, is a chronic condition characterized by bladder, urethral, and pelvic pain; urinary urgency; and urinary frequency. Bladder pain syndrome poses many clinical challenges: (1) The diagnosis is one of exclusion and is often inappropriately assigned; (2) a wide-range spectrum of symptoms can be noted in the population from minimally affected to debilitated; and (3) the etiology for the disease is unknown, which has made the development of directed therapies problematic. The objective of this article was to review the current theories of etiology of BPS and the diagnosis of BPS and understand treatment options including surgical, complementary, and pharmaceutical.

Tension-Free Vaginal Tape Failure after Robotic Sacrocolpopexy and Tension-Free Vaginal Tape for Concomitant Prolapse and Stress Incontinence

Objective Evidence of surgical cure with tension free vaginal tape (TVT) is robust for isolated stress urinary incontinence, but rigorous studies investigating combined prolapse and incontinence are lacking. Our study measured cure of stress incontinence in concomitant robotic sacrocolpopexy and retropubic sling (TVT). We hypothesized a higher rate of objective failure as measured by the cough stress test (CST) compared to failures reported in recent randomized trials of TVT in patients without prolapse (aggregate 8% failure). Methods Prospective cohort of patients with stress incontinence and prolapse, scheduled for robotic sacrocolpopexy and TVT. Outcomes assessed at 12 months: CST (primary aim), Patient Global Impression of Improvement (PGI-I), Pelvic Floor Distress Inventory, and the Sandvik questionnaire. Results Sixty-six of 77 subjects (86%) completed follow-up. Average age was 65 years, 96% were white, with mean body mass index of 28.1 kg/m2. Mean parity was 2.7, 50% had a previous hysterectomy. Mean leading edge of prolapse was +2.3 cm. All patients underwent the planned surgery; additionally, 50% underwent hysterectomy and 38% posterior colporrhaphy. The TVT failure (+CST) was 19.7% (95% confidence interval, 11.3%–31.7%; P < 0.001 compared to 8%). Neither preoperative disease severity, nor preoperative prolapse stage affected risk of failure of TVT. Eighty-three percent of the subjects were happy or very happy (PGI-I). However, those with a positive CST (failure) had significantly less satisfaction on PGI-I, UDI-6, and Pelvic Floor Distress Inventory-20. Conclusions In this population with advanced prolapse, cure of stress urinary incontinence by TVT in setting of robotic sacrocolpopexy is lower compared to published trials where prolapse is absent. Women are less satisfied when the postoperative CST is positive.

The Presacral Space and its Impact on Sacral Neuromodulator Implantation

PURPOSE We describe the presacral space and its potential impact on sacral neuromodulator implantation and bowel injury. MATERIALS AND METHODS Parasagittal images containing bilateral sacral foramina (S2-S4) were examined on 45 pelvic magnetic resonance images. Images were excluded from analysis if they were poor quality or had any history causing distortion of normal anatomy. We measured the natural angle between the foramina and the dorsal skin to approximate the needle angulation during neuromodulator electrode placement. Using these angles we measured the distance from the skin to any bowel (D1), the skin to the dorsal sacrum (D2) and then calculated the distance from the dorsal sacrum to any bowel (D3). RESULTS Mean subject age was 45 years (range 19 to 78) and body mass index was 27.9 kg/m(2) (range 18.6 to 56.2). At S3 the mean foraminal angle and D3 were 46 +/- 8.4 degrees and 27.4 +/- 11.7 mm, respectively. Increasing age was moderately correlated to widening D3 at each foramina (r = 0.3, Pearsons p <0.05). Body mass index did not consistently vary with D3 at any foramina. CONCLUSIONS Our measurements suggest that the presacral space can be expected to be approximately 27 mm at the level of S3 where the neuromodulator electrode is implanted. It is possible to encounter bowel while performing this implantation using standard techniques and equipment. We recommend the standard use of fluoroscopy during placement.

Robotic objective structured assessment of technical skills: a randomized multicenter dry laboratory training pilot study.

Study Objective The goal of this study was to determine if a robotic dry laboratory curriculum for gynecology and urology residents improved their basic robotic skills. Methods After the institution-specific institutional review board approval or exemption, 165 residents from 8 gynecology and/or urology programs were enrolled. Residents underwent standardized robotic orientation followed by dry laboratory testing on 4 unique robotic tasks. Residents were block randomized by program to unstructured or structured training programs. Regardless of group, residents were expected to practice for 15 minutes twice monthly over 7 months. Errors, time to completion, and objective structured assessment of technical skills global rating scores were recorded for each task before and after the training period. Statistics were calculated using the Student t tests, Pearson correlation, and analysis of variance with STATA systems (version 11.2). Results A total of 99 residents completed both the pretraining and posttraining testing. A mean of 4 (range, 0–15) 15-minute training sessions per resident was self-reported. The structured group had faster posttraining times on the transection task, although the unstructured group had higher posttraining scores on the knot-tying task. Conclusions Overall, the residents’ robotic skills improved after participating in a dry laboratory curriculum; however, robotic availability, duty hour restrictions, and clinical responsibilities limit the curriculum implementation.