Enabling Technologies for Gynecologic Vaginal Surgery: A Systematic Review

OBJECTIVE

To systematically review the literature to evaluate clinical and surgical outcomes for technologies that facilitate vaginal surgical procedures.

DATA SOURCES

We systematically searched MEDLINE, EMBASE, and ClinicalTrials.gov from January 1990 to May 2022.

METHODS OF STUDY SELECTION

Comparative and single-arm studies with data on contemporary tools or technologies facilitating intraoperative performance of vaginal gynecologic surgical procedures for benign indications were included. Citations were independently double screened, and eligible full-text articles were extracted by two reviewers. Data collected included study characteristics, technology, patient demographics, and intraoperative and postoperative outcomes. Risk of bias for comparative studies was assessed using established methods, and restricted maximum likelihood model meta-analyses were conducted as indicated.

TABULATION, INTEGRATION, AND RESULTS

The search yielded 8,658 abstracts, with 116 eligible studies that evaluated pedicle sealing devices (n=32), nonrobotic and robotic vaginal natural orifice transluminal endoscopic surgery (n=64), suture capture devices (n=17), loop ligatures (n=2), and table-mounted telescopic cameras (n=1). Based on 19 comparative studies, pedicle sealing devices lowered vaginal hysterectomy operative time by 15.9 minutes (95% CI, -23.3 to -85), blood loss by 36.9 mL (95% CI, -56.9 to -17.0), hospital stay by 0.2 days (95% CI, -0.4 to -0.1), and visual analog scale pain scores by 1.4 points on a subjective 10-point scale (95% CI, -1.7 to -1.1). Three nonrandomized comparative studies and 53 single-arm studies supported the feasibility of nonrobotic vaginal natural orifice transluminal endoscopic surgery for hysterectomy, adnexal surgery, pelvic reconstruction, and myomectomy. Data were limited for robotic vaginal natural orifice transluminal endoscopic surgery, suture capture devices, loop ligatures, and table-mounted cameras due to few studies or study heterogeneity.

CONCLUSION

Pedicle sealing devices lower operative time and blood loss for vaginal hysterectomy, with modest reductions in hospital stay and pain scores. Although other technologies identified in the literature may have potential to facilitate vaginal surgical procedures and improve outcomes, additional comparative effectiveness research is needed.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO, CRD42022327490.

Repair of Vesicovaginal Fistulae: A Systematic Review

OBJECTIVE

To assess and compile the current level of evidence regarding successful surgical treatment of vesicovaginal fistulae and how these perioperative interventions affect anatomic, patient-centered, and adverse outcomes.

DATA SOURCES

PubMed and EMBASE were searched from inception through September 9, 2022.

METHODS OF STUDY SELECTION

This review included comparative studies (of any sample size) and single-group studies (1,000 or more participants) of primary or recurrent vesicovaginal fistula (ie, vesicovaginal fistula, urethrovaginal fistula, and bladder neck-vaginal fistula). We evaluated preintervention assessment or management, various techniques for intraoperative management, and postoperative management. Outcomes of interest included anatomic and objective outcomes (such as successful repair, fistula closure, urinary incontinence, recurrent fistula, perioperative complications) and subjective outcomes (such as voiding symptoms and quality of life). Abstracts and full-text articles were screened in duplicate, and study descriptions and findings were extracted into standardized extraction forms. Risk of bias was assessed independently by two investigators and adjudicated by a third. Study quality was summarized with standardized tools. We conducted random-effects model and restricted maximum-likelihood meta-analyses of relative risks when at least three studies compared similar interventions and reported similar outcome measures.

TABULATION, INTEGRATION, AND RESULTS

Forty-six studies met the inclusion criteria. Studies were categorized into 11 domains: 1) preoperative assessment, 2) preoperative and postoperative physical therapy, 3) route of surgery, 4) incorporation of a flap, 5) trimming, 6) layered closure, 7) intraoperative antibiotics, 8) fibrin glue, 9) fascial sling, 10) postoperative Foley catheter duration, and 11) quality of life. Although the strength of the data is insufficient, preoperative phenazopyridine, physical therapy, layered closure, and intraoperative antibiotics seemed to improve the rate of successful fistula repair. Route of surgery (vaginal vs abdominal laparotomy) was determined primarily by surgeon preference and showed no difference in successful fistula repair. In addition, use of interpositional flaps, trimming fistula edges, fibrin glue, and fascial sling did not show significant improvement in rates of fistula cure. Overall, quality-of-life scores improved postoperatively regardless of route of repair and use of interpositional flaps.

CONCLUSION

Our findings highlight the limited information available to guide evidence-based treatment of vesicovaginal fistula repair. Overall, high-quality evidence is lacking to provide guidelines; therefore, expert opinion remains the primary influence for fistula repair recommendations.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO, CRD42021214948.

Management of mixed urinary incontinence: IUGA committee opinion

INTRODUCTION AND HYPOTHESIS

Mixed urinary incontinence (MUI) is defined by the International Urogynecology Association (IUGA) and International Continence Society as the complaint of involuntary leakage of urine associated with urgency and also with exertion, effort, sneezing or coughing. It therefore implies the coexistence of both stress urinary incontinence (SUI) and urgency urinary incontinence (UUI). MUI is a heterogeneous diagnosis that requires an assessment of its individual components of SUI and UUI. Management requires an individualised approach to the symptom components. The aim of this review is to identify the assessment/investigations and management options for MUI.

METHODS

A working subcommittee from the IUGA Research & Development (R&D) Committee was created and volunteers invited from the IUGA membership. A literature review was performed to provide guidance focused on the recommended assessment and management of MUI. The document was then evaluated by the entire IUGA R&D Committee and IUGA Board of Directors and revisions made. The final document represents the IUGA R&D Committee Opinion.

RESULTS

The R&D Committee MUI opinion paper provides guidance on the assessment and management of women with MUI and summarises the evidence-based recommendations.

CONCLUSIONS

Mixed urinary incontinence is a complex problem and successful management requires alleviation of both the stress and urge components. Care should be individualised based on patient preferences. Further research is needed to guide patients in setting goals and to determine which component of MUI to treat first. The evidence for many of the surgical/procedural treatment options for MUI are limited and needs to be explored in more detail.

Randomized Trial on Expectations and Pain Control Advancement in Surgery: The REPAIR Study

IMPORTANCE

Following standardized preoperative education and adoption of shared decision making positively affects postoperative narcotic practices.

OBJECTIVES

The aim of this study was to assess the impact of patient-centered preoperative education and shared decision making on the quantities of postoperative narcotics prescribed and consumed after urogynecologic surgery.

STUDY DESIGN

Women undergoing urogynecologic surgery were randomized to "standard" (standard preoperative education, standard narcotic quantities at discharge) or "patient-centered" (patient-informed preoperative education, choice of narcotic quantities at discharge) groups. At discharge, the "standard" group received 30 (major surgery) or 12 (minor surgery) pills of 5-mg oxycodone. The "patient-centered" group chose 0 to 30 (major surgery) or 0 to 12 (minor surgery) pills. Outcomes included postoperative narcotics consumed and unused. Other outcomes included patient satisfaction/preparedness, return to activity, and pain interference. An intention-to-treat analysis was performed.

RESULTS

The study enrolled 174 women; 154 were randomized and completed the major outcomes of interest (78 in the standard group, 76 in the patient-centered group). Narcotic consumption did not differ between groups (standard group: median of 3.5 pills, interquartile range [IQR] of [0, 8.25]; patient centered: median of 2, IQR of [0, 9.75]; P = 0.627). The patient-centered group had fewer narcotics prescribed ( P < 0.001) and unused ( P < 0.001), and chose a median of 20 pills (IQR [10, 30]) after a major surgical procedure and 12 pills (IQR [6, 12]) after a minor surgical procedure, with fewer unused narcotics (median difference, 9 pills; 95% confidence interval, 5-13; P < 0.001). There were no differences between groups' return to function, pain interference, and preparedness or satisfaction ( P > 0.05).

CONCLUSIONS

Patient-centered education did not decrease narcotic consumption. Shared decision making did decrease prescribed and unused narcotics. Shared decision making in narcotic prescribing is feasible and may improve postoperative prescribing practices.

Patient-Reported Outcome Measures for Use in Women With Pelvic Organ Prolapse: A Systematic Review

OBJECTIVE

To describe the psychometric properties of existing patient-reported outcome measures for women with prolapse using the COSMIN (Consensus-Based Standards for the Selection of Health Measurement Instruments) framework. Additional objectives were to describe the patient-reported outcome scoring method or interpretation, methods of administration, and to compile a list of the non-English languages in which the patient-reported outcomes are reportedly validated.

DATA SOURCES

PubMed and EMBASE was searched through September 2021. Study characteristics, patient-reported outcome details, and psychometric testing data were extracted. Methodologic quality was assessed with COSMIN guidelines.

METHODS OF STUDY SELECTION

Studies reporting the validation of a patient-reported outcome in women with prolapse (or women with pelvic floor disorders that included a prolapse assessment) and reporting psychometric testing data on English-language patient-reported outcome for at least one measurement property per COSMIN and the U.S. Department of Health and Human Services definitions were included, as well as studies reporting the translation of an existing patient-reported outcome into another language, a new method of patient-reported outcome administration, or a scoring interpretation. Studies reporting only pretreatment and posttreatment scores, only content or face validity, or only findings for nonprolapse domains of the patient-reported outcome were excluded.

TABULATION, INTEGRATION, AND RESULTS

Fifty-four studies covering 32 patient-reported outcomes were included; 106 studies assessing translation into a non-English language were excluded from the formal review. The number of validation studies per patient-reported outcome (one version of one questionnaire) ranged from 1 to 11. Reliability was the most reported measurement property, and most measurement properties received an average rating of sufficient. The condition-specific patient-reported outcomes had on average more studies and reported data across more measurement properties compared with adapted and generic patient-reported outcomes.

CONCLUSION

Although measurement property data vary on patient-reported outcomes for women with prolapse, most data were of good quality. Overall, condition-specific patient-reported outcomes had more studies and reported data across more measurement properties.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO, CRD42021278796.

Prescription Opioid Use for Acute Pain and Persistent Opioid Use After Gynecologic Surgery: A Systematic Review

OBJECTIVE

To assess the amount of opioid medication used by patients and the prevalence of persistent opioid use after discharge for gynecologic surgery for benign indications.

DATA SOURCES

We systematically searched MEDLINE, EMBASE, and ClinicalTrials.gov from inception to October 2020.

METHODS OF STUDY SELECTION

Studies with data on gynecologic surgical procedures for benign indications and the amount of outpatient opioids consumed, or the incidence of either persistent opioid use or opioid-use disorder postsurgery were included. Two reviewers independently screened citations and extracted data from eligible studies.

TABULATION, INTEGRATION, AND RESULTS

Thirty-six studies (37 articles) met inclusion criteria. Data were extracted from 35 studies; 23 studies included data on opioids consumed after hospital discharge, and 12 studies included data on persistent opioid use after gynecologic surgery. Average morphine milligram equivalents (MME) used in the 14 days after discharge were 54.0 (95% CI 39.9-68.0, seven tablets of 5-mg oxycodone) across all gynecologic surgery types, 35.0 (95% CI 0-75.12, 4.5 tablets of 5-mg oxycodone) after a vaginal hysterectomy, 59.5 (95% CI 44.4-74.6, eight tablets of 5-mg oxycodone) after laparoscopic hysterectomy, and 108.1 (95% CI 80.5-135.8, 14.5 tablets of 5-mg oxycodone) after abdominal hysterectomy. Patients used 22.4 MME (95% CI 12.4-32.3, three tablets of 5-mg oxycodone) within 24 hours of discharge after laparoscopic procedures without hysterectomy and 79.8 MME (95% CI 37.1-122.6, 10.5 tablets of 5-mg oxycodone) from discharge to 7 or 14 days postdischarge after surgery for prolapse. Persistent opioid use occurred in about 4.4% of patients after gynecologic surgery, but this outcome had high heterogeneity due to variation in populations and definitions of the outcome.

CONCLUSION

On average, patients use the equivalent of 15 or fewer 5-mg oxycodone tablets (or equivalent) in the 2 weeks after discharge after major gynecologic surgery for benign indications. Persistent opioid use occurred in 4.4% of patients who underwent gynecologic surgery for benign indications. Our findings could help surgeons minimize overprescribing and reduce medication diversion or misuse.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO, CRD42020146120.

Gynecologic surgical skill acquisition through simulation with outcomes at the time of surgery: a systematic review and meta-analysis

OBJECTIVE

To evaluate the effect of simulation training vs traditional hands-on surgical instruction on learner operative skills and patient outcomes in gynecologic surgeries.

DATA SOURCES

PubMed, Embase, ClinicalTrials.gov, and the Cochrane Central Register of Controlled Trials from inception to January 12, 2021.

STUDY ELIGIBILITY CRITERIA

Randomized controlled trials, prospective comparative studies, and prospective single-group studies with pre- and posttraining assessments that reported surgical simulation-based training before gynecologic surgery were included.

METHODS

Reviewers independently identified the studies, obtained data, and assessed the study quality. The results were analyzed according to the type of gynecologic surgery, simulation, comparator, and outcome data, including clinical and patient-related outcomes. The maximum likelihood random effects model meta-analyses of the odds ratios and standardized mean differences were calculated with estimated 95% confidence intervals.

RESULTS

Twenty studies, including 13 randomized controlled trials, 1 randomized crossover trial, 5 nonrandomized comparative studies, and 1 prepost study were identified. Most of the included studies (14/21, 67%) were on laparoscopic simulators and had a moderate quality of evidence. Meta-analysis showed that compared with traditional surgical teaching, high- and low-fidelity simulators improved surgical technical skills in the operating room as measured by global rating scales, and high-fidelity simulators decreased the operative time. Moderate quality evidence was found favoring warm-up exercises before laparoscopic surgery. There was insufficient evidence to conduct a meta-analysis for other gynecologic procedures.

CONCLUSION

Current evidence supports incorporating simulation-based training for a variety of gynecologic surgeries to increase technical skills in the operating room, but data on patient-related outcomes are lacking.

Treatment of refractory overactive bladder with OnabotulinumtoxinA vs PTNS: TROOP trial

INTRODUCTION AND HYPOTHESIS

We hypothesized that patients with refractory overactive bladder (rOAB) have similar improvement with percutaneous tibial nerve stimulation (PTNS) and OnabotulinumtoxinA (BTX).

METHODS

This multicenter cohort study compared BTX and PTNS in women with rOAB. Baseline information included Overactive Bladder Questionnaire (OABq) short form, Urinary Distress Inventory-6 (UDI-6), and voiding diary. Primary outcome was cure, defined as "very much better" or "much better" on the Patient Global Impression of Improvement (PGII) AND a reduction in OABq symptom severity scale (SSS) ≥10 at 3 months after treatment. Assuming 80% power to detect a ten-point difference in OABq-SSS, 80 participants were required per group.

RESULTS

A total of 150 patients were enrolled; 97 completed 3 months of therapy and were included. At baseline, BTX patients had more detrusor overactivity (70% vs 40%, p = 0.025), urgency incontinence (UUI; OABq-SSS#6 4 vs 3, p = 0.02, SSS 65 vs 56, p = 0.04), but similar health-related quality of life (HRQL 49 vs 54, p = 0.28), voids (7 vs 8, p = 0.13), and UUI episodes (2 vs 2, p = 1.0). At 3 months, cure rates were similar: BTX 50% vs PTNS 44.2% (p = 0.56). Both groups had improved SSS (-37 vs -29, p = 0.08) and HRQL (31 vs 24, p = 0.14). Patients receiving BTX had a greater improvement in urgency (ΔOABq-SSS#2-3 vs -2; p = 0.02) and UUI (ΔOABq-SSS#6-2 vs -1; p = 0.02). No characteristics were predictive of cure.

CONCLUSIONS

BTX resulted in significantly greater improvement in urgency and UUI than PTNS, but no difference in success based on PGII and OABq-SSS, which may be due to a lack of power.

Chlorhexidine gluconate vs povidone-iodine vaginal antisepsis for urogynecologic surgery: a randomized controlled noninferiority trial

BACKGROUND

Although povidone-iodine (iodine) is the only Food and Drug Administration-approved vaginal antiseptic solution, there is a lack of comparative data evaluating alternatives. Chlorhexidine gluconate is readily accessible, recommended by multiple societies as an alternative for patients with iodine allergy, and preliminary data indicate that it may provide superior antisepsis.

OBJECTIVE

This study aimed to compare the effectiveness of chlorhexidine and iodine as presurgical vaginal antiseptic solutions in preventing the most common surgery-associated infection after gynecologic surgery, urinary tract infections.

STUDY DESIGN

We conducted a randomized controlled noninferiority trial among women undergoing urogynecologic surgery. The primary outcome measure was symptomatic urinary tract infection within 2 weeks after surgery. The secondary outcomes included culture-proven urinary tract infection at 2 and 6 weeks after surgery, symptomatic urinary tract infections at 6 weeks after surgery, any surgical site infection at 2 weeks after surgery, and patient-reported vaginal irritation after surgery. We required 58 participants per arm to demonstrate noninferiority of chlorhexidine vs iodine (margin of relative risk of <1.5 for the upper limit of 95% confidence interval) between groups for the primary outcome.

RESULTS

A total of 119 participants (61 in the chlorhexidine group and 58 in the iodine group) completed the primary outcome and were included in the analyses. There was no difference in the groups' demographic characteristics, medical history, operations performed, or perioperative factors. Chlorhexidine was not inferior to iodine concerning the primary outcome, symptomatic urinary tract infection at 2 weeks after surgery (10% vs 17%; relative risk, 0.6; 95% confidence interval [-∞, 1.3]). Furthermore, chlorhexidine was not inferior to iodine for the secondary urinary tract infection outcomes (culture-proven urinary tract infection at 2 and 6 weeks after surgery and symptomatic urinary tract infection at 6 weeks after surgery). Groups were similar in terms of surgical site infection (overall 3/119 [2.5%]) and presence of any vaginal irritation (4/54 [7.4%], for both groups).

CONCLUSION

Chlorhexidine was not inferior to iodine for vaginal antisepsis before urogynecologic surgery concerning urinary tract infection. Given the similar postoperative urinary tract infection rates demonstrated in this study and the lack of difference in vaginal irritation, chlorhexidine seemed to be a safe and reasonable option for vaginal antisepsis before surgical procedures. Additional studies are needed to further examine surgical site infection.

Peer-Centered Versus Standard Physician-Centered Video Counseling for Midurethral Sling Surgery: A Randomized Controlled Trial

OBJECTIVES

Peer counseling may improve upon provider counseling and enhance patient preparedness for midurethral sling (MUS) surgery. We aimed to compare the impact of peer-centered versus standard preoperative video counseling by assessing patient preparedness for MUS surgery.

METHODS

Women undergoing MUS were randomized to view either a peer-centered (PEER) or standard physician preoperative counseling video (PHYS). The PEER video featured a woman who had undergone MUS surgery and included the standard risks and benefits as well as additional information identified in prior work as important to patients. The PHYS video featured a surgeon discussing risks and benefits. Patients viewed either video at their preoperative visit and completed the Patient Preparedness Questionnaire (PPQ), Surgical Decision Satisfaction, Decisional Regret Scale, and the Urogenital Distress Inventory Short Form. Patients then underwent standard in-person surgeon counseling. Sessions were timed and compared with historical timed sessions. Our primary outcome was between-group differences in 6-week postoperative PPQ scores.

RESULTS

Patient Preparedness Questionnaire scores did not differ between groups (postoperative PPQ scores: median [interquartile range], 95 [84, 100] vs 92 [80, 100]; P=0.50). The PEER group reported higher decisional regret (15 [0, 28.75] vs 0 [0, 10], P=0.02) and less symptom improvement on Urogenital Distress Inventory Short Form change scores compared with the PHYS group (47.2 [37.2, 62.5] vs 36.1 [16.5, 50], P=0.03); secondary outcomes were not different between groups. In-person counseling times decreased after watching either video compared with the institution's historical standard (8:27 minutes [08:56, 17:14] vs 11:34 minutes [5:22, 13:07]; P < 0.005).

CONCLUSION

Patient preparedness did not differ between groups. Decision regret did not differ between groups once adjusted for urinary symptoms.

Female Pelvic Fistulae

Female pelvic fistulae are a pathologic connection between the urinary or gastrointestinal tract and the genital tract. Although this condition has been present for millennia, successful surgical treatments have only been described for the past few hundred years. In developed nations, the most common cause of genitourinary fistulae is benign gynecologic surgery, but worldwide it is obstetric trauma. Fistulae management is rooted in surgical intervention with the highest probability of success associated with the first repair.

Recommended standardized anatomic terminology of the posterior female pelvis and vulva based on a structured medical literature review

BACKGROUND

Anatomic terminology in both written and verbal forms has been shown to be inaccurate and imprecise.

OBJECTIVE

Here, we aimed to (1) review published anatomic terminology as it relates to the posterior female pelvis, posterior vagina, and vulva; (2) compare these terms to "Terminologia Anatomica," the internationally standardized terminology; and (3) compile standardized anatomic terms for improved communication and understanding.

STUDY DESIGN

From inception of the study to April 6, 2018, MEDLINE database was used to search for 40 terms relevant to the posterior female pelvis and vulvar anatomy. Furthermore, 11 investigators reviewed identified abstracts and selected those reporting on posterior female pelvic and vulvar anatomy for full-text review. In addition, 11 textbook chapters were included in the study. Definitions of all pertinent anatomic terms were extracted for review.

RESULTS

Overall, 486 anatomic terms were identified describing the vulva and posterior female pelvic anatomy, including the posterior vagina. "Terminologia Anatomica" has previously accepted 186 of these terms. Based on this literature review, we proposed the adoption of 11 new standardized anatomic terms, including 6 regional terms (anal sphincter complex, anorectum, genital-crural fold, interlabial sulcus, posterior vaginal compartment, and sacrospinous-coccygeus complex), 4 structural terms (greater vestibular duct, anal cushions, nerve to the levator ani, and labial fat pad), and 1 anatomic space (deep postanal space). In addition, the currently accepted term rectovaginal fascia or septum was identified as controversial and requires further research and definition before continued acceptance or rejection in medical communication.

CONCLUSION

This study highlighted the variability in the anatomic nomenclature used in describing the posterior female pelvis and vulva. Therefore, we recommended the use of standardized terminology to improve communication and education across medical and anatomic disciplines.

Microscopic Hematuria as a Screening Tool for Urologic Malignancies in Women

INTRODUCTION

Most causes of microscopic hematuria (MH) are benign but may indicate an underlying malignancy. Current MH evaluation guidelines are reflective of male urologic malignancy risks. The objective of this systematic review was to evaluate whether the finding of MH predicts subsequent urologic malignancy in women.

METHODS

MEDLINE was searched between January 1990 and June 8, 2018. The positive predictive value (PPV) of MH as a screening tool for urologic malignancy was calculated for each study individually and collectively. The pooled relative risk of urologic malignancy associated with MH was calculated.

RESULTS

Seventeen studies were included. Eight studies included only women. In total, 300 urinary tract cancers were identified in 110,179 women with MH. The PPV of MH as a screening tool for cancer ranged from approximately 0.6% to 2.8%; confidence intervals (CIs) suggested this is a relatively unstable performance indicator because of small sample sizes. Average PPV across all studies was 2.13%, but the weighted average PPV was 0.24%. The risk of urologic malignancies among women with relative those without MH was 2.01 (95% CI, 1.61-2.51). Based on these limited data, we estimate that 859 (95% CI, 654-1250) women with MH would require complete evaluation to identify 1 urinary tract malignancy.

CONCLUSIONS

A very small proportion of women with MH are likely to have a urologic malignancy. Approximately 859 women require full screening to identify 1 malignancy. Current evidence is limited, and further studies, specifically in women, are needed.

Guidance for gynecologists utilizing telemedicine during COVID‐19 pandemic based on expert consensus and rapid literature reviews

Background

COVID‐19 has impacted delivery of outpatient gynecology and shifted care toward use of telemedicine.

Objective

To rapidly review literature and society guidelines and create expert consensus to provide guidance regarding management of outpatient gynecology scenarios via telemedicine.

Search strategy

Searches were conducted in Medline and Cochrane databases from inception through April 15, 2020.

Selection criteria

Literature searches were conducted for articles on telemedicine and abnormal uterine bleeding, chronic pelvic pain, endometriosis, vaginitis, and postoperative care. Searches were restricted to available English language publications.

Data collection and analysis

Expedited literature review methodology was followed and 10 943 citations were single‐screened. Full‐text articles and relevant guidelines were reviewed and narrative summaries developed.

Main results

Fifty‐one studies on the use of telemedicine in gynecology were found. Findings were reported for these studies and combined with society guidelines and expert consensus on four topics (abnormal uterine bleeding, chronic pelvic pain and endometriosis, vaginal discharge, and postoperative care).

Conclusions

Guidance for treating gynecological conditions via telemedicine based on expedited literature review, review of society recommendations, and expert consensus is presented. Due to minimal evidence surrounding telemedicine and gynecology, a final consensus document is presented here that can be efficiently used in a clinical setting.

Guidance for gynecologists using telemedicine during COVID‐19 based on rapid literature review, review of society recommendations, and expert consensus in accessible format.

A guide for urogynecologic patient care utilizing telemedicine during the COVID-19 pandemic: review of existing evidence

Introduction and hypothesis

The COVID-19 pandemic and the desire to “flatten the curve” of transmission have significantly affected the way providers care for patients. Female Pelvic Medicine and Reconstructive Surgeons (FPMRS) must provide high quality of care through remote access such as telemedicine. No clear guidelines exist on the use of telemedicine in FPMRS. Using expedited literature review methodology, we provide guidance regarding management of common outpatient urogynecology scenarios during the pandemic.

Methods

We grouped FPMRS conditions into those in which virtual management differs from direct in-person visits and conditions in which treatment would emphasize behavioral and conservative counseling but not deviate from current management paradigms. We conducted expedited literature review on four topics (telemedicine in FPMRS, pessary management, urinary tract infections, urinary retention) and addressed four other topics (urinary incontinence, prolapse, fecal incontinence, defecatory dysfunction) based on existing systematic reviews and guidelines. We further compiled expert consensus regarding management of FPMRS patients in the virtual setting, scenarios when in-person visits are necessary, symptoms that should alert providers, and specific considerations for FPMRS patients with suspected or confirmed COVID-19.

Results

Behavioral, medical, and conservative management will be valuable as first-line virtual treatments. Certain situations will require different treatments in the virtual setting while others will require an in-person visit despite the risks of COVID-19 transmission.

Conclusions

We have presented guidance for treating FPMRS conditions via telemedicine based on rapid literature review and expert consensus and presented it in a format that can be actively referenced.

Pharmacologic and Nonpharmacologic Treatments for Urinary Incontinence in Women: A Systematic Review and Network Meta-analysis of Clinical Outcomes

BACKGROUND

Urinary incontinence (UI), a common malady in women, most often is classified as stress, urgency, or mixed.

PURPOSE

To compare the effectiveness of pharmacologic and nonpharmacologic interventions to improve or cure stress, urgency, or mixed UI in nonpregnant women.

DATA SOURCES

MEDLINE, Cochrane Central Register of Controlled Trials (Wiley), Cochrane Database of Systematic Reviews (Wiley), EMBASE (Elsevier), CINAHL (EBSCO), and PsycINFO (American Psychological Association) from inception through 10 August 2018.

STUDY SELECTION

84 randomized trials that evaluated 14 categories of interventions and reported categorical cure or improvement outcomes.

DATA EXTRACTION

1 researcher extracted study characteristics, results, and study-level risk of bias, with verification by another independent researcher. The research team collaborated to assess strength of evidence (SoE) across studies.

DATA SYNTHESIS

84 studies reported cure or improvement outcomes (32 in stress UI, 16 in urgency UI, 4 in mixed UI, and 32 in any or unspecified UI type). The most commonly evaluated active intervention types included behavioral therapies, anticholinergics, and neuromodulation. Network meta-analysis showed that all interventions, except hormones and periurethral bulking agents (variable SoE), were more effective than no treatment in achieving at least 1 favorable UI outcome. Among treatments used specifically for stress UI, behavioral therapy was more effective than either α-agonists or hormones in achieving cure or improvement (moderate SoE); α-agonists were more effective than hormones in achieving improvement (moderate SoE); and neuromodulation was more effective than no treatment for cure, improvement, and satisfaction (high SoE). Among treatments used specifically for urgency UI, behavioral therapy was statistically significantly more effective than anticholinergics in achieving cure or improvement (high SoE), both neuromodulation and onabotulinum toxin A (BTX) were more effective than no treatment (high SoE), and BTX may have been more effective than neuromodulation in achieving cure (low SoE).

LIMITATION

Scarce direct (head-to-head trial) evidence and population heterogeneity based on UI type, UI severity, and history of prior treatment.

CONCLUSION

Most nonpharmacologic and pharmacologic interventions are more likely than no treatment to improve UI outcomes. Behavioral therapy, alone or in combination with other interventions, is generally more effective than pharmacologic therapies alone in treating both stress and urgency UI.

PRIMARY FUNDING SOURCE

Patient-Centered Outcomes Research Institute. (PROSPERO: CRD42017069903).

Trends in patient procurement of postoperative opioids and route of hysterectomy in the United States from 2004 through 2014

BACKGROUND

The opioid epidemic in the United States is a public health emergency. Minimally invasive surgical technology has decreased length of hospital stay, improved postoperative recovery, and decreased postoperative pain. Hysterectomy is one of the most commonly performed surgeries in the United States. Increasing trends in minimally invasive gynecologic surgery are expected to reduce patients' postoperative pain. It is unclear whether this assumption has resulted in decreasing postoperative opioid prescriptions or patient need for these prescriptions, as prescribing patterns may be contributing to the current opioid public health emergency.

OBJECTIVE

We sought to describe opioid prescribing and patient procurement practices for postoperative pain at time of discharge for benign hysterectomy from 2004 through 2014 using the Truven Health Analytics MarketScan Research Database. The trends of the route of hysterectomy over this time period were concomitantly described to reflect the movement toward more minimally invasive approaches.

STUDY DESIGN

The Truven Health Analytics MarketScan Research Database including the Commercial Claims and Encounters Database, and the Medicare Supplemental and Coordination of Benefits Database were utilized. Current Procedural Terminology, 4th Edition, and International Classification of Diseases, Ninth Revision, codes identified all patients who underwent a hysterectomy for benign indications from 2004 through 2014. Hysterectomy routes were categorized into abdominal, laparoscopic, and vaginal. The MarketScan database captures prescriptions filled at a retail or mail-order pharmacy and does not capture prescriptions filled within the inpatient, hospital facility. The days of opioids procured by patients at the time of discharge were identified for each encounter. Descriptive statistics were used to summarize data within the entire study period. Although this article is purely descriptive, further analyses were conducted for exploratory purposes only. analysis of variance and χ² analyses were used for continuous and categorical variables, respectively. Multiple linear regression models were used to describe associations between variables of interest and postoperative opioid prescriptions.

RESULTS

We identified 793,016 patients who underwent a hysterectomy for benign indications from 2004 through 2014. Of these, 96% were identified from the Commercial Claims and Encounters Database. During the study period, the overall route of hysterectomy was categorized into 40.5% abdominal, 42.0% laparoscopic, and 17.5% vaginal hysterectomy. The route of hysterectomy changed from 60.2-25.6% (a decrease of Δ = 34.58; 95% confidence interval, 33.96-35.20) for abdominal, 17.0-61.9% (an increase of Δ = 44.83; 95% confidence interval, 44.21-45.44) for laparoscopic, and 22.8-12.6% (a decrease of Δ = 10.25; 95% confidence interval, 9.77-10.73) for vaginal. At discharge, the percentage of patients who were prescribed opioids and filled them increased from 25.6-82.1% (an increase of Δ = 56.50; 95% confidence interval, 55.88-57.13 with P < .001) from 2004 through 2014 for all hysterectomy routes. Additionally, the quantity of opioids prescribed also increased.

CONCLUSION

Opioid prescriptions filled for postoperative pain after hysterectomy substantially increased from 2004 through 2014. Opioid prescription procurement has increased despite a concomitant increase in minimally invasive hysterectomy routes. In light of the current opioid epidemic, physicians must recognize that postoperative prescribing practices may contribute to chronic opioid use. Heightened awareness of opioid prescribing practices following surgery is critically important to decrease risk of development of chronic opioid dependence.

Predictors of early postoperative voiding dysfunction and other complications following a midurethral sling

BACKGROUND

The rates reported for postoperative urinary retention following midurethral sling procedures are highly variable. Determining which patients have a higher likelihood of failing a voiding trial will help with preoperative counseling prior to a midurethral sling.

OBJECTIVE

The objective of the study was to identify preoperative predictors for failed voiding trial following an isolated midurethral sling.

STUDY DESIGN

A retrospective, multicenter, case-control study was performed by including all isolated midurethral sling procedures performed between Jan. 1, 2010 to June 30, 2015, at 6 academic centers. We collected demographics, medical and surgical histories, voiding symptoms, urodynamic evaluation, and intraoperative data from the medical record. We excluded patients not eligible for attempted voiding trial after surgery (eg, bladder perforation requiring catheterization). Cases failed a postoperative voiding trial and were discharged with an indwelling catheter or taught intermittent self-catheterization; controls passed a voiding trial. We also recorded any adverse events such as urinary tract infection or voiding dysfunction up to 6 weeks after surgery. Bivariate analyses were completed using Mann-Whitney and Pearson χ² tests as appropriate. Multivariable stepwise logistic regression was used to determine predictors of failing a voiding trial.

RESULTS

A total of 464 patients had an isolated sling (70.9% retropubic, 28.4% transobturator, 0.6% single incision); 101 (21.8%) failed the initial voiding trial. At follow-up visits, 90.4% passed a second voiding trial, and 38.5% of the remainder passed on the third attempt. For the bivariate analyses, prior prolapse or incontinence surgery was similar in cases vs controls (31% vs 28%, P = .610) as were age, race, body mass index, and operative time. Significantly more of the cases (32%) than controls (22%) had a Charlson comorbidity index score of 1 or greater (P = .039). Overactive bladder symptoms of urgency, frequency, and urgency incontinence were similar in both groups as was detrusor overactivity in those with a urodynamic evaluation (29% vs 22%, P = .136), but nocturia was reported more in the cases (50% vs 38%, P = .046). Mean (SD) bladder capacity was similar in both groups (406 [148] mL vs 388 [122] mL, P = .542) as was maximum flow rate with uroflowmetry and pressure flow studies. Cases were significantly more likely to have a voiding type other than detrusor contraction: 37% vs 25%, P = .027, odds ratio, 1.79 (95% confidence interval, 1.07-3.00). There was no difference in voiding trial failures between retropubic and transobturator routes (23.1% vs 18.9%, P = .329). Within 6 weeks of surgery, the frequency of urinary tract infection in cases was greater than controls (20% vs 6%, P < .001; odds ratio, 3.51 [95% confidence interval, 1.82-6.75]). After passing a repeat voiding trial, cases were more likely to present with acute urinary retention (10% vs 3%, P = .003; odds ratio, 4.00 [95% confidence interval, 1.61-9.92]). For multivariable analyses, increasing Charlson comorbidity index increased the risk of a voiding trial failure; apart from this, we did not identify other demographic information among the patients who did not undergo urodynamic evaluation that reliably forecasted a voiding trial failure.

CONCLUSION

The majority of women will pass a voiding trial on the first attempt after an isolated midurethral sling. Current medical comorbidities are predictive of a voiding trial failure, whereas other demographic/examination findings are not. Patients failing the initial voiding trial are at an increased risk of postoperative urinary tract infection or developing acute retention after passing a subsequent voiding trial.

Sunshine Act: shedding light on inaccurate disclosures at a gynecologic annual meeting

BACKGROUND

Physicians and hospital systems often have relationships with biomedical manufacturers to develop new ideas, products, and further education. Because this relationship can influence medical research and practice, reporting disclosures are necessary to reveal any potential bias and inform consumers. The Sunshine Act was created to develop a new reporting system of these financial relationships called the Open Payments database. Currently all disclosures submitted with research to scientific meetings are at the discretion of the physician. We hypothesized that financial relationships between authors and the medical industry are underreported.

OBJECTIVES

We aimed to describe concordance between physicians' financial disclosures listed in the abstract book from the 41st annual scientific meeting of the Society of Gynecologic Surgeons to physician payments reported to the Center for Medicaid and Medicare Services Open Payments database for the same year.

STUDY DESIGN

Authors and scientific committee members responsible for the content of the 41st annual scientific meeting of the Society of Gynecologic Surgeons were identified from the published abstract book; each abstract listed disclosures for each author. Abstract disclosures were compared with the transactions recorded on the Center for Medicaid and Medicare Services Open Payments database for concordance. Two authors reviewed each nondisclosed Center for Medicaid and Medicare Services listing to determine the relatedness between the company listed on the Center for Medicaid and Medicare Services and abstract content.

RESULTS

Abstracts and disclosures of 335 physicians meeting inclusion criteria were reviewed. A total of 209 of 335 physicians (62%) had transactions reported in the Center for Medicaid and Medicare Services, which totaled $1.99 million. Twenty-four of 335 physicians (7%) listed companies with their abstracts; 5 of those 24 physicians were concordant with the Center for Medicaid and Medicare Services. The total amount of all nondisclosed transactions was $1.3 million. Transactions reported in the Center for Medicaid and Medicare Services associated with a single physician ranged from $11.72 to $405,903.36. Of the 209 physicians with Center for Medicaid and Medicare Services transactions that were not disclosed, the majority (68%) had at least 1 company listed in the Center for Medicaid and Medicare Services that was determined after review to be related to the subject of their abstract.

CONCLUSION

Voluntary disclosure of financial relationships was poor, and the majority of unlisted disclosures in the abstract book were companies related to the scientific content of the abstract. Better transparency is needed by physicians responsible for the content presented at gynecological scientific meetings.

Mindfulness-based stress reduction as a novel treatment for interstitial cystitis/bladder pain syndrome: a randomized controlled trial

INTRODUCTION AND HYPOTHESIS

Mindfulness-based stress reduction (MBSR) is a standardized meditation program that may be an effective therapy for interstitial cystitis/bladder pain syndrome (IC/BPS), a condition exacerbated by stress. The aims of this study were to explore whether MBSR improved IC/BPS symptoms and the feasibility/acceptability of MSBR among women with IC/BPS.

METHODS

This randomized controlled trial included women with IC/BPS undergoing first- or second-line therapies. Women were randomized to continuation of usual care (UC) or an 8-week MBSR class + usual care (MBSR). Participants completed baseline and 8-week post-treatment questionnaires, including the O'Leary-Sant Symptom Problem Index (OSPI), the visual analog pain scale (VAS), the Short Form Health Survey (SF-12), the Female Sexual Function Index (FSFI), and the Pain Self-Efficacy Questionnaire (PSEQ). The Global Response Assessment (GRA) was completed post-treatment. Analyses were performed using Student's t test, Chi-squared, and MANOVA where appropriate.

RESULTS

Eleven women were randomized to UC and 9 to MBSR, without differences in group characteristics. More MBSR participants' symptoms were improved on the GRA (7 out of 8 [87.5 %] vs 4 out of 11 [36.4 %], p = 0.03). The MBSR group showed greater improvement in the OSPI total (p = 0.0498) and problem scores (p = 0.036); the OSPI symptom score change did not differ. PSEQ scores improved in MBSR compared with UC (p = 0.035). VAS, SF-12, and FSFI change did not differ between groups. Eighty-six percent of MBSR participants felt more empowered to control symptoms, and all participants planned to continue MBSR.

CONCLUSIONS

This trial provides initial evidence that MBSR is a promising adjunctive therapy for IC/BPS. Its benefit may arise from patients' empowerment and ability to cope with symptoms.

Important role of physicians in addressing psychological aspects of interstitial cystitis/bladder pain syndrome (IC/BPS): a qualitative analysis

INTRODUCTION

Interstitial cystitis/bladder pain syndrome (IC/BPS) is a poorly understood source of chronic pain causing significant morbidity, with variable treatment success. Despite the need to understand patient perspectives in chronic pain, there is a paucity of qualitative data for IC/BPS. We aimed to acquire information regarding patient experience with IC/BPS symptoms and with their medical care to elicit suggestions to improve patient satisfaction with that care.

METHODS

Fifteen women with IC/PBS participated in a total of four focus groups. Sessions were recorded and transcribed and information deidentified. Focus groups were conducted until thematic saturation was reached. All transcripts were coded and analyzed by a minimum of three independent physician reviewers. Investigators identified emergent themes and concepts using grounded-theory methodology.

RESULTS

Participant's mean age was 52.6 years, with an average IC/BPS duration of 6.3 years. Thematic saturation was reached after four focus groups. We identified three emergent patient experience concepts: IC/PBS is debilitating, the disease course is unpredictable and unrelenting, and patients experience significant isolation. Importantly, suicidal ideation was expressed in each group. Patients voiced strong preference for physicians who provided education regarding the condition, an array of treatment options, organized treatment plans, and optimism and hope regarding treatment outcomes.

CONCLUSIONS

Our study presents novel findings of the importance of patient-physician interaction in IC/BPS and reinforces the tremendous disability and burden of this disease, which frequently manifests in suicidal ideation. Patients preferred organized treatment plans with diverse choices and providers who offered hope in dealing with their condition.

Perineorrhaphy: commonly performed yet poorly understood. A survey of surgeons

INTRODUCTION AND HYPOTHESIS

Perineorrhaphy is performed for the prevention of recurrent prolapse, improved sexual function, treatment of pain, and cosmesis. Its use is based on expert opinion with few objective data. We aimed to describe factors that are important to surgeons when deciding to perform perineorrhaphy and variations in surgical technique.

METHODS

We administered an anonymous survey to surgeon attendees at the 2014 SGS annual scientific meeting regarding which factors are important when deciding to perform a perineorrhaphy and details of their surgical technique. Surgeons rated the importance of factors; one-way ANOVA was used to rank the decision factors and post hoc pairwise comparisons with Fisher's least significant difference method were used to evaluate the importance between factors.

RESULTS

A total of 183 out of 360 surgeon attendees responded. Most were between ages 36 and 60 (79 %), 56 % were female, 64 % practiced in an academic environment, and 64 % had undergone subspecialty training. An enlarged genital hiatus (GH) ranked as the most important factor influencing the decision to perform a perineorrhaphy, followed by a concomitant prolapse procedure (p < 0.001). Sexual function and cosmesis were rated as being less important. The decision to perform perineorrhaphy was made with the patient in 65 % of cases, and otherwise in the operating room. Significant heterogeneity exists regarding surgeon suture preference and how muscles were re-approximated. Most (81 %) reported incorporating structures both proximal and distal to the hymen in their repairs.

CONCLUSION

Genital hiatus size and concomitant prolapse procedures ranked highest in surgeons' decision to perform a perineorrhaphy. Significant heterogeneity exists in the indications for and technique used to perform perineorrhaphy.

Impact of robotic technology on hysterectomy route and associated implications for resident education

OBJECTIVE

We sought to compare the proportion of benign hysterectomies performed vaginally and the mean number of hysterectomies with resident involvement by route before and after robot implementation.

STUDY DESIGN

This multicenter, retrospective cohort study using nonsynchronous controls was conducted through the Society of Gynecologic Surgeons Fellows' Pelvic Research Network. The route of hysterectomy for benign disease was compared for 1-year periods before (prerobot) and after (postrobot) robotic introduction at 4 academic institutions. We reviewed medical records and recorded patient demographics, hysterectomy approach, preoperative and postoperative diagnosis, and resident involvement.

RESULTS

In all, 1440 hysterectomies were included: 732 in the prerobot group and 708 in the postrobot group. Median age was 46 years and mean body mass index was 29.5 (standard deviation, 6.9). The proportion of hysterectomies performed via the vaginal route decreased from 42.5% prerobot to 30.5% postrobot (P < .0001) and via the abdominal route from 22.1% prerobot to 16.5% postrobot (P = .001). The proportion of hysterectomies performed laparoscopically increased from 1.6% prerobot to 11.9% postrobot (P < .0001). At a mean of 2.3 years after introduction of the robot into an institution, hysterectomies performed using robotic assistance accounted for 23.3% of hysterectomies for benign disease. Mean uterine weight was similar in the prerobot and postrobot groups. Resident involvement in all hysterectomies done via all routes other than robotic increased from 81.0% prerobot to 88.6% postrobot; however, residents were involved in only 58.9% of robotic hysterectomies.

CONCLUSION

The proportion of hysterectomies performed vaginally has significantly decreased since the adoption of robotic technology at institutions included in this study. The proportion of hysterectomies with resident involvement is lower with a robotic approach than any other route.

Mesh sacrocolpopexy compared with native tissue vaginal repair: a systematic review and meta-analysis

OBJECTIVE

To systematically review outcomes after mesh sacrocolpopexy compared with native tissue vaginal repairs in women with apical prolapse.

DATA SOURCES

We searched MEDLINE, EMBASE, the Cochrane Central Register of Controlled Trials, and ClinicalTrials.gov through June 4, 2012.

METHODS OF STUDY SELECTION

For anatomic and functional analyses, we included studies comparing mesh sacrocolpopexy to native tissue vaginal repairs with at least 6 months follow-up. The primary outcome was anatomic "success" after surgery. Secondary outcomes were reoperation and symptom outcomes. We included large case series and comparative studies with shorter follow-up to increase power for adverse event analyses.

TABULATION, INTEGRATION, AND RESULTS

Evidence quality was assessed with the Grades for Recommendation, Assessment, Development and Evaluation system. Meta-analyses were performed when at least three studies reported the same outcome. We included 13 comparative studies for anatomic success, reoperation, and symptom outcomes. Moderate-quality evidence supports improved anatomic outcomes after mesh sacrocolpopexy; very low-quality evidence shows no differences in reoperation between sacrocolpopexy and native tissue vaginal repairs. Evidence was insufficient regarding which procedures result in improved bladder or bowel symptoms. Low-quality evidence showed no differences in postoperative sexual function. Adverse event data were compiled and meta-analyzed from 79 studies. When including larger noncomparative studies, ileus or small bowel obstruction (2.7% compared with 0.2%, P<.01), mesh or suture complications (4.2% compared with 0.4%, P<.01), and thromboembolic phenomena (0.6% compared with 0.1%, P=.03) were more common after mesh sacrocolpopexy compared with native tissue vaginal repairs.

CONCLUSION

When anatomic durability is a priority, we suggest that mesh sacrocolpopexy may be the preferred surgical option. When minimizing adverse events or reoperation is the priority, there is no strong evidence supporting one approach over the other.

Bladder pain syndrome/interstitial cystitis in twin sisters

PURPOSE

We determined the genetic contribution of and associated factors for bladder pain syndrome using an identical twin model.

MATERIALS AND METHODS

Multiple questionnaires were administered to adult identical twin sister pairs. The O'Leary-Sant Interstitial Cystitis Symptom and Problem Index was administered to identify individuals at risk for bladder pain syndrome. Potential associated factors were modeled against the bladder pain syndrome score with the twin pair as a random effect of the factor on the bladder pain syndrome score. Variables that showed a significant relationship with the bladder pain syndrome score were entered into a multivariable model.

RESULTS

In this study 246 identical twin sister pairs (total 492) participated with a mean age (± SD) of 40.3 ± 17 years. Of these women 45 (9%) were identified as having a moderate or high risk of bladder pain syndrome (index score greater than 13). There were 5 twin sets (2%) in which both twins met the criteria. Correlation of bladder pain syndrome scores within twin pairs was estimated at 0.35, suggesting a genetic contribution to bladder pain syndrome. Multivariable analysis revealed that increasing age (estimate 0.46 [95% CI 0.2, 0.7]), irritable bowel syndrome (1.8 [0.6, 3.7]), physical abuse (2.5 [0.5, 4.1]), frequent headaches (1.6 [0.6, 2.8]), multiple drug allergies (1.5 [0.5, 2.7]) and number of self-reported urinary tract infections in the last year (8.2 [4.7, 10.9]) were significantly associated with bladder pain syndrome.

CONCLUSIONS

Bladder pain syndrome scores within twin pairs were moderately correlated, implying some genetic component. Increasing age, irritable bowel syndrome, frequent headaches, drug allergies, self-reported urinary tract infections and physical abuse were factors associated with higher bladder pain syndrome scores.

Accuracy of the digital anal examination in women with fecal incontinence

INTRODUCTION AND HYPOTHESIS

This study aims to determine the accuracy of digital rectal examination (DRE) to detect anal sphincter defects when compared to endoanal ultrasound (US) in women with fecal incontinence (FI).

METHODS

Seventy-four patients identified by retrospective chart review who presented with complaints of bothersome FI who underwent endoanal US are the subjects of this analysis. Sensitivity, specificity, and positive and negative likelihood ratios were calculated for the ability of the DRE to detect anal sphincter defects.

RESULTS

Anal sphincter defect was suspected on DRE in 75%. At endoanal US, external sphincter defects were noted in all three segments in 41% (complete defect) while partial defects were noted in 30%. DRE demonstrated a sensitivity of 82%, specificity of 32%, +likelihood ratio 1.2 (95% confidence interval (CI), 0.95-1.16) and -likelihood ratio of 0.6 (95% CI, 0.2-1.24) for detecting a complete EAS defect on endoanal US.

CONCLUSION

DRE has poor specificity for detecting anal sphincter defects seen on endoanal US.

Modeling substrate- and inhibitor-bound forms of liver alcohol dehydrogenase: chemistry of mononuclear nitrogen/sulfur-ligated zinc alcohol, formamide, and sulfoxide complexes

Using a mixed nitrogen/sulfur ligand possessing a single internal hydrogen bond donor (N,N-bis-2-(methylthio)ethyl-N-(6-amino-2-pyridylmethyl)amine (bmapa)), we prepared and structurally and spectroscopically characterized a series of zinc complexes possessing a single alcohol ([(bmapa)Zn(MeOH)](ClO(4))(2) (1)), formamide ([(bmapa)Zn(DMF)](ClO(4))(2) (3), [(bmapa)Zn(NMF)](ClO(4))(2) (4)), or sulfoxide ([(bmapa)Zn(DMSO)](ClO(4))(2) (7), [(bmapa)Zn(TMSO)](ClO(4))(2) (8)) ligand. X-ray crystallographic characterization was obtained for 1.MeOH, 3, 4, 7.DMSO, and 8. To enable studies of the influence of the single hydrogen bond donor amino group of the bmapa ligand on the chemistry of zinc/neutral oxygen donor binding interactions, analogous alcohol ([(bmpa)Zn(MeOH)](ClO(4))(2) (2)), formamide ([(bmpa)Zn(DMF)](ClO(4))(2) (5), [(bmpa)Zn(NMF)](ClO(4))(2) (6)), and sulfoxide ([(bmpa)Zn(DMSO)](ClO(4))(2) (9), [(bmpa)Zn(TMSO)](ClO(4))(2) (10)) complexes of the bmpa (N,N-bis-2-(methylthio)ethyl-N-(2-pyridylmethyl)amine) ligand system were generated and characterized. Of these, 2, 5, 6, and 9.2DMSO were characterized by X-ray crystallography. Solution spectroscopic methods ((1)H and (13)C NMR, FTIR) were utilized to examine the formamide binding properties of 3-6 in CH(3)CN and CH(3)NO(2) solutions. Conclusions derived from this work include the following: (1) the increased donicity of formamide and sulfoxide donors (versus alcohols) makes these competitive ligands for a cationic N/S-ligated zinc center, even in alcohol solution, (2) the inclusion of a single internal hydrogen bond donor, characterized by a heteroatom distance of approximately 2.80-2.95 A, produces subtle structural perturbations in N/S-ligated zinc alcohol, formamide, or sulfoxide complexes, (3) the heteroatom distance of a secondary hydrogen-bonding interaction involving the oxygen atom of a zinc-coordinated alcohol, formamide, and sulfoxide ligand is reduced with increasing donicity of the exogenous ligand, and (4) formamide displacement on a N/S-ligated zinc center is rapid, regardless of the presence of an internal hydrogen bond donor. These results provide initial insight into the chemical factors governing the binding of a neutral oxygen donor to a N/S-ligated zinc center.