Gina M. Northington

Functional status and postoperative morbidity in older women with prolapse.

PURPOSE We determined the relationship of preoperative functional status to postoperative morbidity after pelvic organ prolapse surgery in women older than 60 years. MATERIALS AND METHODS We performed a retrospective cohort study of 223 women older than 60 years who underwent surgery for stage II or greater pelvic organ prolapse. Our exposure was preoperative functional status, defined as American Society of Anesthesiologists (ASA) physical status class. We compared postoperative outcomes (length of stay in a medical facility, and number and severity of postoperative complications) in women with low functional status (ASA class III) to those in women with high functional status (ASA classes I and II). We determined the association of preoperative functional status with postoperative outcomes on multivariate analysis. RESULTS Women in ASA class III were significantly likely to be older (mean ± SD age 72.7 ± 7.3 vs 68.3 ± 6.5 years) and of nonwhite ethnicity (36.1% vs 20.1%), have a higher body mass index (mean 29.5 ± 5.6 vs 26.1 ± 3.8 kg/m(2)) and worse functional comorbidity score (median 3 vs 2), and have undergone obliterative surgery (33.3% vs 9.1%) than women in ASA classes I and II (each p <0.05). Low preoperative functional status was independently associated with increased length of stay in a medical facility (2.13 days, 95% CI 0.57, 3.70, p <0.01) and postoperative complications (OR 2.17, 95% CI 1.03, 4.56), after adjusting for age, body mass index, nonwhite ethnicity, number of comorbidities, surgeon and type of surgery. CONCLUSIONS As defined by ASA class, preoperative functional status is significantly associated with postoperative length of stay and complications. Preoperative functional status is useful for predicting postoperative outcomes in older women who undergo pelvic organ prolapse surgery.

Outcomes of Robotic Sacrocolpopexy: A Systematic Review and Meta-Analysis

Objectives Robotic sacrocolpopexy has been rapidly incorporated into surgical practice without comprehensive and systematically published outcome data. The aim of this study was to systematically review the currently published peer-reviewed literature on robotic-assisted laparoscopic sacrocolpopexy with more than 6 months of anatomic outcome data. Methods Studies were selected after applying predetermined inclusion and exclusion criteria to a MEDLINE search. Two independent reviewers blinded to each other’s results abstracted demographic data, perioperative information, and postoperative outcomes. The primary outcome assessed was anatomic success rate defined as less than or equal to pelvic organ prolapse quantification system (POP-Q) stage 1. A random effects model was performed for the meta-analysis of selected outcomes. Results Thirteen studies were selected for the systematic review. Meta-analysis yielded a combined estimated success rate of 98.6% (95% confidence interval, 97.0%–100%). The combined estimated rate of mesh exposure/erosion was 4.1% (95% confidence interval, 1.4%–6.9%), and the rate of reoperation for mesh revision was 1.7%. The rates of reoperation for recurrent apical and nonapical prolapse were 0.8% and 2.5%, respectively. The most common surgical complication (excluding mesh erosion) was cystotomy (2.8%), followed by wound infection (2.4%). Conclusions The outcomes of this analysis indicate that robotic sacrocolpopexy is an effective surgical treatment of apical prolapse with high anatomic cure rate and low rate of complications.

Development and testing of a new instrument to measure fluid intake, output, and urinary symptoms: the questionnaire-based voiding diary

OBJECTIVE The purpose of this study was to develop a validated self-administered questionnaire to measure fluid intake, output, behavior, and urinary symptoms. STUDY DESIGN Factor analysis identified 4 subscales in the new questionnaire. Ninety-two women completed the questionnaire, comprised of a 48-hour voiding diary and the Bristol Female Lower Urinary Tract Symptom-Scored form. The questionnaire was readministered after a 2-week period with no change in treatment and 2-3 months later after treatment of urinary symptoms. RESULTS Correlation of items of the questionnaire with the 48-hour voiding diary in the 4 subscales was high (r = 0.55, 0.74. 0.68, and 0.47; P < .01). Subscale scores also correlated with the Bristol Lower Urinary Tract Symptom score (r = 0.68 and =0.87; P < .001). Comparisons of scores before and after treatment showed the ability of the questionnaire to respond to change. CONCLUSION The new questionnaire is a valid and reliable means to assess fluid intake, output, behavior, and urinary symptoms.

Evidence of Bladder Oversensitivity in the Absence of an Infection in Premenopausal Women with a History of Recurrent Urinary Tract Infections

Study Type – Prevalence (case control)

Acute colonic inflammation triggers detrusor instability via activation of TRPV1 receptors in a rat model of pelvic organ cross-sensitization

Chronic pelvic pain of unknown etiology is a common clinical condition and may develop as a result of cross-sensitization in the pelvis when pathological changes in one of the pelvic organs result in functional alterations in an adjacent structure. The aim of the current study was to compare transient receptor potential vanilloid 1 (TRPV1) activated pathways on detrusor contractility in vivo and in vitro using a rat model of pelvic organ cross-sensitization. Four groups of male Sprague-Dawley rats (N = 56) were included in the study. Animals received intracolonic saline (control), resiniferatoxin (RTX, TRPV1 agonist, 10(-7) M), 2,4,6-trinitrobenzene sulfonic acid (TNBS, colonic irritant), or double treatment (RTX followed by TNBS). Detrusor muscle contractility was assessed under in vitro and in vivo conditions. Intracolonic RTX increased the contractility of the isolated detrusor in response to electric field stimulation (EFS) by twofold (P ≤ 0.001) and enhanced the contractile response of the bladder smooth muscle to carbachol (CCh). Acute colonic inflammation reduced detrusor contractility upon application of CCh in vitro, decreased bladder capacity by 28.1% (P ≤ 0.001), and reduced micturition volume by 60% (P ≤ 0.001). These changes were accompanied by an increased number of nonmicturition contractions from 3.7 ± 0.7 to 15 ± 2.7 (N = 6 in both groups, P ≤ 0.001 vs. control). Desensitization of intracolonic TRPV1 receptors before the induction of acute colitis restored the response of isolated detrusor strips to CCh but not to EFS stimulation. Cystometric parameters were significantly improved in animals with double treatment and approximated the control values. Our data suggest that acute colonic inflammation triggers the occurrence of detrusor instability via activation of TRPV1-related pathways. Comparison of the results obtained under in vitro vs. in vivo conditions provides evidence that intact neural pathways are critical for the development of an overactive bladder resulting from pelvic organ cross talk.

Contractile Response of Human Anterior Vaginal Muscularis in Women With and Without Pelvic Organ Prolapse

The aim of this study was to compare the contractility of the anterior vaginal muscularis (AVM) from women with and without pelvic organ prolapse (POP). In vitro experiments were performed to measure the peak force generated in response to potassium chloride (KCl; 125 mmol/L) and phenylephrine by AVM tissue from women with and without POP. Cross-sectional areas and co-localization of α1A adrenergic receptor protein with smooth muscle α-actin in AVM strips were determined by histology and immunofluorescence, respectively. There were no differences in the mean amplitude of force generated in response to KCl normalized to either wet weight or muscle cross-sectional area (mN/mm2) between women with and without POP (P > .30). However, AVM from women with prolapse produced a significantly higher mean force to KCl normalized to total cross-sectional area compared to controls (P = .007). While the control samples demonstrated a consistent response to phenylephrine, there was no response to this stimulant generated by AVM tissue from women with POP. The proportion of co-localized α1A adrenergic receptors with smooth muscle α actin in AVM tissue was significantly less in women with POP compared to normal controls (P < .0001). Although there was significantly greater tissue stress generated by AVM from women with prolapse compared to controls, there were no differences in muscle stress. Absent response to phenylephrine by AVM from women with prolapse may be related to a lower expression of α1A adrenergic receptors in vaginal smooth muscle.

Self-reported estrogen use and newly incident urinary incontinence among postmenopausal community-dwelling women.

ObjectiveThe aim of this study was to examine the relationship between self-reported estrogen use and newly incident urinary incontinence (UI) among community-dwelling postmenopausal women. MethodsThe study was a population-based longitudinal survey of postmenopausal women who did not report UI in 1993 and for whom complete data were available. Women were classified as having newly incident UI if they reported uncontrolled urine loss within 12 months of the 2004 interview. Condition-specific functional loss secondary to UI was assessed using questions on the participants’ inability to engage in certain activities because of UI. The duration of hormone therapy containing estrogen was obtained in 1993 using a structured questionnaire. ResultsAmong the 167 postmenopausal women who did not report UI in 1993, 47 (28.1%) reported newly incident UI, and 31 (18.6%) reported newly incident UI with condition-specific functional loss in 2004. Of the 167 postmenopausal women, 46 (27.5%) reported using hormone therapy containing estrogen ever, and 14 (8.3%) women reported using hormone therapy containing estrogen for 5 years or more in 1993. Estrogen use for 5 years or more was significantly associated with newly incident UI with condition-specific functional loss compared with estrogen use for less than 5 years or having no reported history of estrogen (adjusted relative odds, 3.97; 95% CI, 1.02-15.43) in multivariate models controlling for potentially influential characteristics. ConclusionsPostmenopausal community-dwelling women with a history of estrogen use for 5 years or more were more likely to report newly incident UI with condition-specific functional loss after 10 years of follow-up.

Bowel and bladder dysfunction following surgery within the presacral space: an overview of neuroanatomy, function, and dysfunction

Introduction and hypothesisThe presacral space contains a dense and complex network of nerves that have significant effects on the innervation of the pelvic viscera and support structures. The proximity of this space to the bony promontory of the sacrum has lead to its involvement in an array of corrective surgical procedures for pelvic floor disorders including sacrocolpopexy and rectopexy. Other procedures involving the same space include presacral neurectomy which involves intentional transection of the contained neural plexus to relieve refractory pelvic pain and resection of retrorectal or presacral tumors. Potential complications of these procedures are postoperative constipation and voiding dysfunction.MethodsOur aim was to review the current published literature on outcomes following a variety of procedures involving the presacral space and review postoperative bowel and urinary function. We also include an overview of the functional and structural anatomy of the presacral space and its corresponding neural plexi.Results/ConclusionsWe conclude that quality data are lacking on the short-term and long-term rates for bowel and bladder dysfunction following surgical procedures involving the presacral space.

Functional significance of muscarinic receptor expression within the proximal and distal rat vagina

Information regarding the role of cholinergic nerves in mediating vaginal smooth muscle contraction is sparse, and in vitro studies of the effects of muscarinic agonists on vaginal smooth muscle are discrepant. The goal of this study was to determine the expression of muscarinic receptors in the vaginal wall of the rat. In addition, we sought to determine the effect of the muscarinic receptor agonist carbachol on contractility and inositol phosphate production of the proximal and distal rat vaginal muscularis. RT-PCR analysis indicated that both M(2) and M(3) receptor transcripts were expressed within the proximal and distal rat vagina. Carbachol dose-dependently (10(-7)-10(-4) M) contracted the rat vaginal muscularis with a greater maximal contractile response in the proximal vagina (P < 0.01) compared with the distal vagina. The contractile responses of the rat vaginal muscularis to carbachol were dose dependently inhibited by the M(3) antagonist para-fluoro-hexahydrosiladefenidol, and a pK(B) of 7.78 and 7.95 was calculated for the proximal and distal vagina, respectively. Inositol phosphate production was significantly increased in both regions of the vagina following 20-min exposure to 50 muM carbachol with higher levels detected in the proximal vagina compared with the distal (P < 0.05). Preliminary experiments indicated the presence of M(2) and M(3) receptors in the human vaginal muscularis as well as contraction of human vaginal muscularis to carbachol, indicating that our animal studies are relevant to human tissue. Our results provide strong evidence for the functional significance of M(3) receptor expression in the vaginal muscularis.

Association of Neuropathic Pain With Bladder, Bowel and Catastrophizing Symptoms in Women With Bladder Pain Syndrome

PURPOSE In this study we determined if there is an association of neuropathic pain with urinary, bowel and catastrophizing symptoms in women with bladder pain syndrome. MATERIALS AND METHODS Female patients with a diagnosis of bladder pain syndrome completed validated questionnaires to assess neuropathic pain, urinary and bowel symptoms, quality of life and pain catastrophizing. Women were dichotomized into neuropathic pain and nonneuropathic pain groups. Urinary and bowel symptoms, pain catastrophizing and quality of life scores were compared between the 2 groups using parametric and nonparametric tests. RESULTS Of 150 women with bladder pain syndrome 40 (27%) had features of neuropathic pain while 110 (73%) did not. Women with features of neuropathic pain had significantly worse urinary urgency (mean ± SD 3.1 ± 3.1 vs 2.1 ± 1.7, p <0.001), bladder pain (3.0 ± 1.1 vs 2.0 ± 1.3, p <0.001), bowel pain (8.8 ± 4.0 vs 5.3 ± 3.6, p <0.001), diarrhea (7.8 ± 6.1 vs 4.1 ± 4.3, p <0.001), quality of life (12.2 ± 5.5 vs 9.8 ± 3.8, p <0.001) and higher pain catastrophizing (32.2 ± 12.4 vs 23.1 ± 14.3, p <0.001) scores than those without neuropathic pain. CONCLUSIONS In women with bladder pain syndrome the presence of neuropathic pain is significantly associated with the severity of bladder and bowel pain, urinary urgency and diarrhea. Women with features of neuropathic pain also have worse pain catastrophizing and quality of life than those without features of neuropathic pain.