The role of the genital hiatus and prolapse symptom bother

Association between enlarged genital hiatus and prolapse with overactive bladder 1 year after vaginal delivery

BACKGROUND

Genital hiatus enlargement is associated with pelvic organ prolapse and overactive bladder 5 to 10 years after first delivery. It is unknown if this association is present earlier postpartum.

OBJECTIVE

This study aimed to understand the association between overactive bladder within 1 year after first vaginal delivery and (1) enlarged genital hiatus, (2) anatomic pelvic organ prolapse, and (3) bulge symptoms.

STUDY DESIGN

This is a secondary analysis of a prospective cohort study of primiparous women with a singleton term vaginal delivery who completed symptom questionnaires and physical examinations at the third trimester and 8 weeks and 1 year postpartum. We defined overactive bladder as the presence of urinary urgency plus urinary frequency or nocturia, or urgency incontinence on the Epidemiology of Prolapse and Incontinence Questionnaire. Enlarged genital hiatus was defined as ≥4 cm, and anatomic pelvic organ prolapse was defined as vaginal descent at or beyond the hymen. We evaluated associations of overactive bladder with genital hiatus and pelvic organ prolapse at 1 year postpartum using Poisson regression.

RESULTS

We included 579 people with a mean age of 29 years; 17% were Hispanic. In separate models, enlarged genital hiatus and anatomic pelvic organ prolapse at 1 year postpartum were each associated with increased overactive bladder prevalence at 1 year postpartum (genital hiatus: adjusted risk ratio, 1.5; 95% confidence interval, 1.1-2.1; pelvic organ prolapse: adjusted risk ratio, 1.8; 95% confidence interval, 1.2-2.6). These effects were greater among women aged ≥30 years (genital hiatus: adjusted risk ratio, 2.1; 95% confidence interval, 1.3-3.4; pelvic organ prolapse: adjusted risk ratio, 2.2; 95% confidence interval, 1.3-3.7) and were not significant among women aged <30 years.

CONCLUSION

Enlarged genital hiatus and pelvic organ prolapse at 1 year postpartum are associated with overactive bladder at as early as 1 year postpartum, particularly among women aged ≥30 years. Genital hiatus may be a marker of pelvic floor function that, when impaired, increases the risk of pelvic organ prolapse and overactive bladder after delivery.

Association Between Enlarged Genital Hiatus and Composite Surgical Failure After Vaginal Hysterectomy With Uterosacral Ligament Suspension

IMPORTANCE

The impact of a persistently enlarged genital hiatus (GH) after vaginal hysterectomy with uterosacral ligament suspension on prolapse outcomes is currently unclear.

OBJECTIVES

This secondary analysis of the Study of Uterine Prolapse Procedures Randomized trial was conducted among participants who underwent vaginal hysterectomy with uterosacral ligament suspension. We hypothesized that women with a persistently enlarged GH size would have a higher proportion of prolapse recurrence.

STUDY DESIGN

Women who underwent vaginal hysterectomy with uterosacral ligament suspension as part of the Study of Uterine Prolapse Procedures Randomized trial (NCT01802281) were divided into 3 groups based on change in their preoperative to 4- to 6-week postoperative GH measurements: (1) persistently enlarged GH, 2) improved GH, or (3) stably normal GH. Baseline characteristics and 2-year surgical outcomes were compared across groups. A logistic regression model for composite surgical failure controlling for advanced anterior wall prolapse and GH group was fitted.

RESULTS

This secondary analysis included 81 women. The proportion with composite surgical failure was significantly higher among those with a persistently enlarged GH (50%) compared with a stably normal GH (12%) with an unadjusted risk difference of 38% (95% confidence interval, 4%-68%). When adjusted for advanced prolapse in the anterior compartment at baseline, the odds of composite surgical failure was 6 times higher in the persistently enlarged GH group compared with the stably normal group (95% confidence interval, 1.0-37.5; P = 0.06).

CONCLUSION

A persistently enlarged GH after vaginal hysterectomy with uterosacral ligament suspension for pelvic organ prolapse may be a risk factor for recurrent prolapse.

Analysis of long-term structural failure after native tissue prolapse surgery: a 3D stress MRI-based study

INTRODUCTION AND HYPOTHESIS

We sought to identify postoperative structural failure sites associated with long-term prolapse recurrence and their association with symptoms and satisfaction.

METHODS

Women who had a research MRI prior to native-tissue prolapse surgery were recruited for examination, 3D stress MRI, and questionnaires. Recurrence was defined by Pelvic Organ Prolapse Quantification System (POP-Q)Ba/Bp > 0 or C > -4. Measurements were performed at rest and maximum Valsalva ("strain") including vaginal length, apex location, urogenital hiatus (UGH), and levator hiatus (LH). Measures were compared between subjects and to women with normal support. Failure frequency was the proportion of women with measurements outside the normal range. Symptoms and satisfaction were measured using validated questionnaires.

RESULTS

Thirty-one women participated 12.7 years after surgery-58% with long-term success and 42% with recurrence. Failure site comparisons between success and failure were: impaired mid-vaginal paravaginal support (62% vs. 28%, p = 0.01), longer vaginal length (54% vs. 22%, p = 0.03), and enlarged urogenital hiatus (54% vs. 22%, p = 0.03). Apical paravaginal location had the lowest failure frequency (recurrence: 15% vs. success: 7%, p = 0.37). Patient satisfaction was high (recurrence: 5.0 vs. success: 5.0, p = 0.86). Women with bothersome bulge symptoms had a 33% larger UGH strain on POP-Q (p = 0.01), 8.7% larger resting UGH (p = 0.046), 11.5% larger straining LH (p = 0.01), and 9.3% larger resting LH (p = 0.01).

CONCLUSIONS

Abnormal low mid-vaginal paravaginal location (Level II), long vaginal length (Level II), and large UGH (Level III) were associated with long-term prolapse recurrence. Patient satisfaction was high and unrelated to anatomical recurrence. Bothersome bulge symptoms were associated with hiatus enlargement.

Determining the Ideal Intraoperative Resting Genital Hiatus Size-Balancing Surgical and Functional Outcomes

IMPORTANCE

The intraoperative resting genital hiatus (GH) size can be surgically modified but its relationship to prolapse recurrence is unclear.

OBJECTIVES

The objective of this study was to identify the optimal intraoperative resting GH size as it relates to prolapse recurrence and functional outcomes at 1 year.

STUDY DESIGN

This prospective cohort study was conducted at 2 hospitals from 2019 to 2021. Intraoperative measurements of the resting GH, perineal body, and total vaginal length were collected. The composite primary outcome consisted of anatomic recurrence, subjective recurrence, and/or conservative or surgical retreatment at 1 year. Comparisons of anatomic, functional, and sexual outcomes were compared between patients stratified by the optimal intraoperative GH size identified by receiver operating characteristic curve analysis.

RESULTS

Sixty-eight patients (median age of 63 years) underwent surgery, with 59 (86.8%) presenting for follow-up at 1 year. Based on the 13 patients (22%) with composite recurrence, receiver operating characteristic curve analysis demonstrated an intraoperative resting GH size of 3 cm, had 76.9% sensitivity (confidence interval [CI], 54-99.8%), and 34.8% specificity (CI, 21.0-48.5%) for composite recurrence at 1 year (area under curve = 0.61). Nineteen patients had an intraoperative GH less than 3 cm (32.2%) and 40 had a GH of 3 cm or greater (67.8%). The intraoperative resting GH size was significantly larger in patients with prolapse beyond the hymen at 1 year (4 cm [3.0, 4.0]) compared with those with prolapse at or proximal to the hymen (3.0 cm [2.5, 3.5], P = 0.009).

CONCLUSIONS

Intraoperative GH size may not reliably predict composite prolapse recurrence at 1 year, although there was an association between intraoperative resting GH size with prolapse beyond the hymen.

Preprocedure and Immediate Postoperative Changes to Genital Hiatus Following Minimally Invasive Sacrocolpopexy

IMPORTANCE

This study assesses resting genital hiatus (GH) measurements under anesthesia as compared with in-office measurements for intraoperative planning purposes.

OBJECTIVES

The aim of this study was to determine the influence of general anesthesia and apical suspension on GH measurements compared with office measurements.

STUDY DESIGN

This was a retrospective cohort of women who underwent minimally invasive sacrocolpopexy within an academic urogynecology practice. Genital hiatus for each patient was measured at 4 time points: (1) preoperative office examination (baseline) at rest (GH rest ) and with strain (GH strain ); (2) following anesthesia induction, at rest (GH induction ); (3) immediately after sacrocolpopexy, at rest (GH colpopexy ); and (4) 4- to 6-week postoperative visit, strain (GH postop ). Enlarged baseline GH strain was defined as ≥4 cm. Paired statistics and analysis of variance were used for comparisons.

RESULTS

Fifty-one women were included, whose mean age was 61.3 ± 8.2 years; the majority had stage ≥3 prolapse (n = 39 [76.4%]). Concomitant procedures included hysterectomy (n = 33 [64.7%]) and posterior colporrhaphy or perineorrhaphy (n = 8 [15.7%]). The majority had an enlarged baseline GH strain (n = 39 [76.4%]), and overall cohort mean was 4.7 ± 1.3 cm. Compared with baseline GH rest , mean GH induction was larger (GH induction : 4.6 ± 1.4 cm vs GH rest : 3.8 ± 1.2 cm, P < 0.01) but not different from baseline GH strain (GH induction : 4.6 ± 1.4 cm vs GH strain : 4.7 ± 1.3 cm, P = 0.81). GH colpopexy was decreased from baseline GH strain with a mean difference of 1.1 ± 1.3 cm ( P < 0.01). This difference was driven by women with enlarged baseline GH strain who experienced a mean decrease of 1.5 ± 1.1 cm ( P < 0.01).

CONCLUSIONS

Genital hiatus after induction of anesthesia does not significantly differ from preoperative straining GH. Apical suspension with sacrocolpopexy alone resulted in immediate reduction in GH measures, with greater decreases observed in women with enlarged preoperative GH.

Surgical Repair of the Genital Hiatus: A Narrative Review

INTRODUCTION AND HYPOTHESIS

An enlarged genital hiatus (GH) is associated with the development of prolapse and may be associated with prolapse recurrence following surgery; however, there is insufficient evidence to support surgical reduction of the GH as prophylaxis against future prolapse. The objective of this review is (1) to review the association between GH size and pelvic organ prolapse and (2) to discuss the existing literature on surgical procedures that narrow the GH.

METHODS

A literature search was performed in the PubMed search engine, using the keyword "genital hiatus." Articles were included if they addressed any of the following topics: (1) normative GH values; (2) associations between the GH and prolapse development or recurrence; (3) surgical alteration of the GH; (4) indications, risks or benefits of surgical alteration of the GH.

RESULTS

An enlarging GH has been observed prior to the development of prolapse. Multiple studies show that an enlarged pre- and/or postoperative GH is associated with an increased risk of recurrent prolapse following prolapse repair surgery. There are limited data on the specific risks of GH alteration related to bowel and sexual function.

CONCLUSIONS

GH size and prolapse appear to be strongly associated. Because GH size appears to be a risk factor for pelvic organ prolapse, the GH size should be carefully considered at the time of surgery. Surgeons should discuss with their patients the risks and potential benefits of additional procedures designed to reduce GH size.