Safety and efficacy of an α1 -blocker plus mirabegron compared with an α1 -blocker plus antimuscarinic in men with lower urinary tract symptoms secondary to benign prostatic hyperplasia and overactive bladder: A systematic review and network meta-analysis.

AIM: Antimuscarinics and the ß3-adrenoreceptor agonist, mirabegron, are commonly used for treating patients with overactive bladder (OAB) and α1 -adrenoreceptor antagonists (α1 -blockers) are the main pharmacological agents used for treating lower urinary tract symptoms (LUTS) secondary to benign prostatic hyperplasia (BPH). As these conditions commonly occur together, the aim of this systematic review was to identify publications that compared the use of an α1 -blocker plus mirabegron with an α1 -blocker plus antimuscarinic in men with LUTS secondary to BPH and OAB. A meta-analysis was subsequently conducted to explore the safety and efficacy of these combinations. METHODS: Included records had to be from a parallel-group, randomized clinical trial that was ≥8 weeks in duration. Participants were male with LUTS secondary to BPH and OAB. The indirect analyses that were identified compared an α1 -blocker plus OAB agent with an α1 -blocker plus placebo. The PubMed/Medical Literature Analysis and Retrieval System Online, the Excerpta Medica Database, the Cochrane Central Register of Controlled Trials, and the ClinicalTrials.gov registry were searched for relevant records up until March 5, 2020. Safety outcomes included incidences of overall treatment-emergent adverse events (TEAEs) and urinary retention, postvoid residual volume, and maximum urinary flow (Qmax ). Primary efficacy outcomes were micturitions/day, incontinence episodes/day, and urgency episodes/day, and secondary outcomes were Overactive Bladder Symptom Score and International Prostate Symptom Score. A Bayesian network meta-analysis approach was used for the meta-analysis. RESULTS: Out of a total of 1039 records identified, 24 were eligible for inclusion in the meta-analysis. There were no statistically significant differences between the α1 -blocker plus mirabegron and α1 -blocker plus antimuscarinic groups in terms of the comparisons identified for all the safety and efficacy analyses conducted. Numerically superior results were frequently observed for the α1 -blocker plus mirabegron group compared with the α1 -blocker plus antimuscarinic group for the safety parameters, including TEAEs, urinary retention, and Qmax . For some of the efficacy parameters, most notably micturitions/day, numerically superior results were noted for the α1 -blocker plus antimuscarinic group. Inconsistency in reporting and study variability were noted in the included records, which hindered data interpretation. CONCLUSION: This systematic review and meta-analysis showed that an α1 -blocker plus mirabegron and an α1 -blocker plus antimuscarinic have similar safety and efficacy profiles in male patients with LUTS secondary to BPH and OAB. Patients may, therefore, benefit from the use of either combination within the clinical setting.

Comparison of Monotherapies and Combination Therapy of Tamsulosin and Tadalafil for Treating Lower Urinary Tract Symptoms Caused by Benign Prostatic Hyperplasia with or without Erectile Dysfunction: A Meta-Analysis.

BACKGROUND: There is limited research into the efficacy and safety of tadalafil combined with tamsulosin for the treatment of lower urinary tract symptoms (LUTS) caused by benign prostatic hyperplasia (BPH), with or without erectile dysfunction (ED). Therefore, we aimed to investigate the efficacy and safety of combination therapy compared to that of monotherapy. METHODS: We searched PubMed, Embase, Cochrane Library, Web of Science, SinoMed, CNKI, WanFang Data Service Platform, and ClinicalTrials.gov to identify eligible studies. A total of 639 articles were retrieved, of which 12 were randomized controlled trials (RCTs) published as of February 2023 and included in this meta-analysis. RESULTS: After screening 639 articles, 12 RCTs including 1,531 subjects were considered eligible for the meta-analysis. The results showed that the total International Prostate System Score (total IPSS), maximum flow rate (Qmax), and quality of life (QoL) in tadalafil combined with tamsulosin were significantly better than those in monotherapy. Compared with tadalafil monotherapy, combination therapy mainly improved IPSS voiding. As for postvoid residual urine (PVR), the combination therapy did not improve PVR compared to the tadalafil group, but significantly improved PVR compared to the tamsulosin group. For the International Index of Erectile Function (IIEF), the curative effect of the combined group was better than that of the tamsulosin group but not better than that of the tadalafil group. In terms of safety, the adverse reactions (AEs) in the combined treatment group were significantly higher than those in the monotherapy group. None of the 12 RCTs reported serious adverse events. CONCLUSIONS: Tadalafil combined with tamsulosin was more effective in the treatment of male LUTS/BPH, with or without ED, on the improvement of total IPSS, QoL, and Qmax. However, the benefits of combination therapy for ED remain unclear. However, combination therapy seemed to have a higher incidence of adverse reactions.

Early vs Delayed Transurethral Surgery in Acute Urinary Retention: Does Timing Make a Difference?

PURPOSE: Our goal was to compare outcomes of early vs delayed transurethral surgery for benign prostatic hyperplasia after an episode of acute urinary retention compared to men without preoperative acute retention. MATERIALS AND METHODS: We conducted a retrospective cohort analysis using data from the New York Statewide Planning and Research Cooperative System from 2002-2016. We identified men ≥40 years old who underwent primary ambulatory transurethral resection or photoselective vaporization of the prostate, assessing surgical failure as time to reoperation or recatheterization. We categorized presurgical acute urinary retention by number of episodes: none (reference), 1, or ≥2 precatheterizations, and time from first retention episode to surgery: none (reference), 0-6 months, and >6 months. We used Fine-Gray competing-risk models to predict surgical failure at 10 years, with presurgical acute retention as the primary predictor, adjusted for age, race, insurance, Charlson Comorbidity Index score, preoperative urinary infection, and procedure type, with death as the competing risk. RESULTS: Among 17,474 patients undergoing transurethral surgery, 10% had preoperative acute retention with a median time to surgery of 2.4 months (IQR: 1-18). Among men with preoperative retention, 37% had ≥6 months of delay to surgery. The 10-year cumulative treatment failure rate was 17.2% among catheter naïve men vs 34.0% with ≥2 precatheterizations and 32.9% with ≥6 months delay to surgery. Delays from catheterization to surgery were associated with higher rates of treatment failure (<6 months SHR 1.49, P < .001; ≥6 months SHR 2.11, P < .001) vs catheter naïve men. CONCLUSIONS: Preoperative acute urinary retention and delay to surgery once catheterized are associated with poorer long-term postoperative outcomes after surgery for benign prostatic hyperplasia.

Effect of bladder filling volume on detrusor contractility in men with bladder outlet obstruction.

INTRODUCTION: Bladder outlet obstruction alters detrusor contractility, reducing the bladder's ability to respond to large filling with a risk of urinary retention. The objective was to assess the effect of bladder filling volume on detrusor contractility in men with bladder outlet obstruction. METHODS: A prospective multicenter study in two pelviperineology departments. Male patients eligible for urodynamics (IPSS score > 7) were included from January to July 2022. In case of absence of bladder outlet obstruction on pressure-flow studies, they were secondarily excluded. The primary endpoint was the maximum isometric detrusor pressure during a stop-test, corresponding to detrusor contractility, measured at 3 filling volumes (50%, 75%, and 100% of cystometric capacity). RESULTS: Fifty-two patients performed urodynamics, of whom 12 were excluded because of lack of obstruction or inability to perform the stop-test. Detrusor contractility was significantly higher for a 75% bladder filling than 50% and for a 75% filling than 100%, with a mean difference of 19.5; confidence interval (CI) 95% [14.3; 24.8] and 12.2; CI 95% [6.9; 17.5] cmH2 O respectively (p < 0,01). CONCLUSION: In case of bladder outlet obstruction in men, detrusor contractility depends on bladder filling volume, with reduced contractility when the bladder was underfilled or overfilled. This phenomenon could help to explain the mechanisms of urinary retention in men with bladder outlet obstruction.

Analysis of factors affecting permanent clean intermittent catheterization and bladder function after primary neurosurgical repair of lipomyelomeningocele.

AIMS: This study was conducted to identify potential risk factors for permanent clean intermittent catheterization (CIC) and incontinence in patients with lipomyelomeningocele (LMMC) and evaluate how LMMC affects bladder function prognosis, measured by urodynamic (UD) score. METHODS: This retrospective study analyzed the electronic health records of patients who underwent primary neurosurgical repair for LMMC at a single tertiary referral center between January 2012 and December 2016 and were followed at least 3 years after surgery. Data regarding bladder function were obtained from medical records for multiple time points, including before surgery, after surgery but before hospital discharge, 3 months after surgery, and at outpatient visits during follow-up. RESULTS: This study enrolled 120 patients. At a mean follow-up of 62.6 ± 13.9 months after primary neurosurgical LMMC repair, 22 (18.3%) patients continued to require CIC for bladder emptying, only 7 (31.8%) of whom maintained bladder continence. A multivariate logistic regression model identified age at the time of surgery and the type of LMMC as significant presurgical prognostic risk factors for permanent CIC. In addition, postoperative urinary retention and a UD score greater than or equal to 5 measured 3 months after surgery were identified as significant postsurgical risk factors for permanent CIC and urinary incontinence. A linear mixed model adjusted for age at the time of surgery showed that patients with a transitional or chaotic LMMC type were more likely to experience gradual bladder function decline than patients with other LMMC types. CONCLUSIONS: This study identified both presurgical (age at the time of surgery, LMMC type) and postsurgical (postoperative urinary retention, UD score greater than or equal to 5 at 3 months postsurgery) risk factors for permanent CIC and urinary incontinence. In addition, LMMC type was identified as a prognostic risk factor for bladder function decline. These results will enhance the current understanding of bladder function outcomes in patients who undergo surgical treatment for LMMC.

The effect of prolapse surgery on voiding function.

INTRODUCTION AND HYPOTHESIS: Of women with symptomatic prolapse, 13-39% experience voiding dysfunction (VD). The aim of our observational cohort study was to determine the effect of prolapse surgery on voiding function. METHODS: Retrospective analysis of 392 women who underwent surgery between May 2005 and August 2020. All had a standardized interview, POP-Q, uroflowmetry and 3D/4D transperineal ultrasound (TPUS) pre-and postoperatively. Primary outcome was change in VD symptoms. Secondary outcomes were changes in maximum urinary flow rate (MFR) centile and post-void residual urine (PVR). Explanatory measures were change in pelvic organ descent as seen on POP-Q and TPUS. RESULTS: Of 392 women, 81 were excluded due to missing data, leaving 311. Mean age and BMI were 58 years and 30 kg/m2, respectively. Procedures performed included anterior repair (n = 187, 60.1%), posterior repair (n = 245, 78.8%), vaginal hysterectomy (n = 85, 27.3%), sacrospinous colpopexy (n = 170, 54.7%) and mid-urethral sling (MUS) (n = 192, 61.7%). Mean follow-up was 7 (1-61) months. Pre-operatively, 135 (43.3%) women reported symptoms of VD. Postoperatively, this decreased to 69 (22.2%) (p < 0.001), and of those, 32 (10.3%) reported de novo VD. The difference remained significant after excluding concomitant MUS surgery (n = 119, p < 0.001). Postoperatively, there was a significant decrease in mean PVR (n = 311, p < 0.001). After excluding concomitant MUS surgery, there was a significant increase in mean MFR centile (p = 0.046). CONCLUSIONS: Prolapse repair significantly reduces symptoms of VD and improves PVR and flowmetry.

Impact on urinary incontinence after management of complications related to a retropubic midurethral sling.

INTRODUCTION AND HYPOTHESIS: The most common complications to midurethral sling (MUS) operations for stress urinary incontinence are postoperative urinary retention (POUR), vaginal MUS exposure, and urgency. They are well described but consensus regarding their management is missing. An evaluation of the treatment of POUR, exposure and urgency after the MUS procedure in our department was implemented. Incontinence status after treatment of complications was evaluated. METHODS: A review of the medical records of women undergoing MUS procedures from 1 January 2017 to 31 December 2021 (n = 329). RESULTS: A total of 279 women (85%) had no complications. Fifty women had one or more complications. Twenty-three women (7%) experienced POUR. Final treatment in 9 women was clean intermittent self-catheterization (CISC). All remained continent. Nine women had the MUS mobilized. This was successful in 8 women who remained continent. Six women had their MUS incised (one after unsuccessful mobilization). Four became incontinent again and 2 remained continent. Eight women had vaginal MUS exposure. Seven attempted recovering of the MUS. This was successful in 3 patients. The remaining had a partial MUS removal. Only 33% remained continent after removal. Ten patients developed de novo urge, but only 2 needed medication. CONCLUSIONS: Mobilization of the MUS must be considered the optimal treatment for POUR when CISC fails. It is the most effective intervention with the best effect on POUR and the lowest risk of incontinence. Concerning vaginal exposure, a trial of recovering should be attempted as the risk of incontinence when undergoing a partial removal of the MUS is considerable.

Total introital obliteration as a consequence of lichen sclerosus: a rare cause of urinary retention.

INTRODUCTION AND HYPOTHESIS: Lichen sclerosus is a chronic inflammatory dermatitis, with a predilection for the anogenital area. In later stages, lichen sclerosus may develop into widespread scarring, and occasionally leading to severe introital stenosis and urinary retention. Our video is aimed at presenting a case of surgical management of lichen sclerosus-related introital stenosis determining urinary retention. METHODS: An 82-year-old woman was evaluated for almost complete urinary retention, with concomitant continuous enuretic urinary leakage all day and night and recurrent urinary tract infection symptoms. The gynecological evaluation demonstrated a complete introital obliteration, without obvious communications for urine passing. After proper informed consent, the patient was admitted for vulvo-perineoplasty. RESULTS: The featured procedure was completed in 25 min and blood loss was negligible. No surgical complications were observed. On postoperative day 1, the patient was successfully discharged home with topical steroid treatment. Histological examination confirmed typical features of lichen sclerosus pathology. At follow-up visits the patient was asymptomatic and examination confirmed persistence of introital patency. CONCLUSIONS: The featured video shows a vulvo-perineoplasty performed in a patient with lichen sclerosus-related complete introital obliteration and urinary retention. The procedure was successful in obtaining anatomical repair and relieving urinary symptoms.

Hyponatraemia caused by transient syndrome of inappropriate antidiuresis to urinary retention.

Hyponatraemia is frequently seen in the emergency department, possibly caused by the syndrome of inappropriate antidiuresis (SIAD). We report three cases in which we believe urinary retention with bladder distention caused hyponatraemia. Laboratory findings fulfilled the criteria for SIAD, for which no cause was found. Possibly pain or sympathetic nerve system activation leads to SIAD. Brisk diuresis occurred after placement of an indwelling urinary catheter with overly correction of sodium for which treatment was necessary. Clinicians should be aware that placement of an indwelling urinary catheter may prompt brisk water diuresis and a tendency to overcorrection.

Systemic sarcoidosis presenting as a rare combination of interstitial nephritis with necrotizing vasculitis and urinary retention due to prostate involvement: a case report.

BACKGROUND: Sarcoidosis affects multiple organs and exhibits diverse clinical manifestations. Although tubulointerstitial nephritis is a known feature of renal involvement, necrotizing vasculitis is rare. Furthermore, prostate involvement with urinary retention is unusual in patients with sarcoidosis. Here, we report a case of systemic sarcoidosis with a rare combination of manifestations and different acute kidney injuries. CASE PRESENTATION: A 66-year-old man developed sudden urinary retention and fever. He was diagnosed with prostatitis and admitted to our hospital. An indwelling urethral catheter was inserted, and antimicrobial therapy was initiated; however, the prostatitis was refractory. Computed tomography revealed enlarged mediastinal lymph nodes. Analysis of transbronchoscopic lymph node and prostate biopsies showed epithelioid cell granulomas, suggesting systemic sarcoidosis. During the clinical course, the serum creatinine level rapidly increased to 2.36 mg/dL without oliguria. A kidney biopsy revealed tubulointerstitial injury with moderate lymphohistiocytic infiltration and small-vessel vasculitis in the interstitium. Following oral administration of 60 mg/day prednisolone, the patient's renal function immediately improved, and urinary retention did not recur. CONCLUSIONS: To the best of our knowledge, this is the first reported case of sarcoidosis with two unusual complications. Given its clinical course and pathology, this case is clinically valuable.

Analysis of Urinary Retention Caused by Selective ß 3-adrenoceptor Agonists Using the Japanese Adverse Drug Event Report Database (JADER).

Overactive bladder (OAB) is a frequent chronic disorder which impairs quality of life by frequent, uncontrollable urination. Newly developed selectiveß 3-adrenoceptor agonists (sß 3-agonists) have the same efficacy in treating OAB but significantly fewer side effects than the traditionally used anti-muscarinics. However, safety data on these compounds are scarce. In this study, we analysed the occurrence of adverse effects in patients taking sß 3-agonists and their characteristics using the JADER database. The most frequently reported adverse effect associated with the use of sß 3-agonists was urinary retention [mirabegron; crude reporting odds ratios (ROR): 62.1, 95% confidence interval (CI): 52.0-73.6, P<0.001, vibegron; crude ROR: 250, 95% CI : 134-483, P<0.001]. Data from patients with urinary retention were stratified by sex. In both men and women, the rate of urinary retention was higher when using the mirabegron/anti-muscarinic drug when compared to mirabegron monotherapy; its occurrence was higher in men with a history of benign prostatic hypertrophy than in those without. Weibull analysis showed that approximately 50% of sß 3 agonist-induced urinary retention occurred within 15 days after initiation of treatment, and then gradually decreased. Although sß 3-agonists are useful against OAB, they may induce several side effects, especially urinary retention, which can further evolve into more severe conditions. Urinary retention occurs more frequently in patients concomitantly taking medication that either increases urethral resistance or has organic factors that block the urethra. When using sß 3-agonists, the concomitantly used medications and underlying diseases should be thoroughly reviewed, and safety monitoring should be instituted early during the treatment.

Evaluation of Quality of Life and Self-reported Complications in Patients With Clean Intermittent Catheterization: An Observational Study.

PURPOSE: This study sought to determine health-related quality of life and self-reported complications associated with clean intermittent catheterization (CIC). DESIGN: Observational, cross-sectional study. SUBJECTS AND SETTING: The target population was patients cared for by the urology department at Hospital 12 de Octubre in Madrid, Spain, undergoing CIC for chronic urinary retention of any etiology (neurogenic bladder dysfunction, neobladder, and other). The sample comprised 50 respondents with a mean age of 49 years; a majority (66%, n = 33) were female. Participants performed an average of 4 CICs. METHODS: All participants completed the ISC-Q (Intermittent Self-Catheterization Questionnaire) and a questionnaire about CIC-associated complications. Data were collected in February 2019. RESULTS: A vast majority of respondents (98%, n = 49) indicated preparation for catheterization was simple, and 76% (n = 38) indicated the catheter was easy to insert. One in 5 (20%, n = 10) considered carrying catheters and supplies inconvenient, though 58% (n = 29) indicated it was easy to dispose of the catheters outside the home. Most respondents (98%, n = 49) indicated they felt self-conscious about their need to self-catheterize, and 16% (n = 8) felt that CIC created limitations when visiting friends and family. The most frequent complication was symptomatic urinary tract infections (UTIs); participants reported an average of 1.7 UTIs in the last year. Additional complications, such as epididymo-orchitis, urethral stenosis, and urethral bleeding, were reported by less than 5% (n = 2) of participants. CONCLUSIONS: Participants managed by CIC for chronic urinary retention of any cause reported acceptable levels of satisfaction with the procedure. The reported incidence of complications was low, except for UTIs.

Nascent myoma as a cause of urinary retention.

We present the case of a 47-year-old woman with a bulky, nascent necrotic myoma, which at first glance appeared to be a malignant process in the cervix. It caused significant retention of urine due to compression of the bladder and ureters, hydronephrosis and deterioration of renal function. A fully developed picture of the "bulge syndrome" dominated - lymphedema of the lower limbs and lower abdomen, pain in the lower abdomen, constipation, secondary secondary urinary infection, and paradoxical ischuria. During a gynecological examination in a specula, a strong-smelling, necrotic tumour was visualized reaching half of the vagina, which was causing a bloody discharge, which brought the patient to the examination. A biopsy was taken from the tumour. A permanent urinary catheter was inserted into the urinary bladder with gradual adjustment of renal functions. Due to the difficulties and the benign histological findings from the biopsy, a simple abdominal hysterectomy with bilateral salpingectomy from a lower midline incision was indicated. The operation was complicated by an extensive adhesive process and blood loss of 1,200 mL, with a decrease in hemoglobin in the blood count from 128 g/L to 79 g/L and the need for three blood transfusions. In the postoperative period, there is a prompt recovery of spontaneous micturition with normalization of bladder function, subsidence of lymphedema and subjective complaints of the patient.

[A multicenter study to test the reliability and validity of the frailty assessment scale for elderly patients with inguinal hernia and to evaluate the value of clinical application].

Objectives: To verify the reliability and validity of the frailty assessment scale for elderly patients with inguinal hernia and to evaluate the value of its clinical application. Methods: A convenience sampling method was used to collect 129 geriatric patients who underwent inguinal hernia surgery from January 2018 to January 2023 in nine hospitals in Liaoning Province. There were 120 males and 9 females, of whom 89 patients were 60 to <75 years old, 33 patients were 75 to <85 years old and 7 patients were ≥85 years old. The 129 patients included 11 elderly patients with inguinal hernia who had recovered from preoperative infection with COVID-19. Statistical methods such as Cronbach's coefficient, Kaiser-Meyer-Olkin test, Bartlett's test, Pearson's correlation analysis, etc. were calculated to verify the reliability indexes such as feasibility, content validity, structural validity, criterion-related validity, internal consistency reliability, and re-test reliability. Taking the 5-item modified frailty index (5-mFI) as the gold standard, the area under the curve was used to analyze the ability of the two scales to predict the occurrence of postoperative acute urinary retention, postoperative delirium, poor incision healing, operative hematoma seroma, and postoperative complications. Results: The frailty assessment scale for elderly patients with inguinal hernia showed good reliability and validity (valid completion rate of 99.2%; item content validity index of 1.000, and the scale content validity index of 1.000; exploratory factor analysis extracted a total of 1 principal component, and factor loadings of each item of 0.565 to 0.873; the AUC for frailty diagnosis using 5-mFI as the gold standard of 0.795 (P<0.01) Cronbach's coefficient of 0.916, retest reliability coefficient of 0.926), it could effectively predict postoperative acute urinary retention, delirium, hematoma seroma in the operative area and total complications (AUC of 0.746, 0.870, 0.806, and 0.738, respectively; all P<0.05), and prediction efficiency was higher than that of 5-mFI (AUC of 0.694, 0.838, 0.626 and 0.641, P<0.05 for delirium only), but both scales were inaccurate in predicting poor incision healing (AUC of 0.519, P=0.913 for the frailty assessment scale and 0.455, P=0.791 for the 5-mFI). Conclusions: The frailty assessment scale for elderly patients with inguinal hernia is reliable and significantly predicts the occurrence of postoperative adverse events in elderly inguinal hernia patients. The scale can also be used for preoperative frailty assessment in elderly patients with inguinal hernia after rehabilitation from COVID-19 infection.

Saline bladder infusion vs standard catheter removal in patients with acute urinary retention related to benign prostatic hyperplasia: The BLAPERF Study.

PURPOSE: Bladder infusion, which involves filling the bladder with saline prior to catheter removal, has been associated with reduced time-to-discharge and increased success rates in trials without catheter (TWOCs) in perioperative setting. The objective of this study was to evaluate the applicability of this protocol in patients with acute urinary retention (AUR) related to benign prostatic hyperplasia (BPH). METHODS: We conducted a retrospective single-center study comparing bladder infusion with at least 150mL of warm saline vs. standard catheter removal during TWOC in patients with BPH-related AUR between January and December 2021. The primary outcome was time to discharge. Secondary outcomes included: TWOC success, and early recurrence of urinary retention defined as recurrence within three months of successful TWOC. RESULTS: A total of 75 men were included: 35 in the bladder infusion protocol and 40 in the standard protocol. Baseline characteristics were well balanced between groups. Overall, 35 patients (46.7%) had a successful TWOC without statistically significant difference between groups (P=0.10). Bladder infusion protocol was associated with a shorter median time to discharge (200 vs. 240min, P=0.003). However, patients in the bladder infusion group were associated with a higher risk of early recurrence of urinary retention (30% vs. 0%, P=0.02). CONCLUSION: In patients with BPH-related AUR, the saline bladder infusion method reduced time-to-discharge with similar TWOC success rates. Larger studies are needed to properly analyze the risk of early recurrence of urinary retention before any clinical application. LEVEL OF EVIDENCE: III.

The low dopamine hypothesis: A plausible mechanism underpinning residual urine, overactive bladder and nocturia (RON) syndrome in older patients.

INTRODUCTION: Aging is associated with a combination of several lower urinary tract (LUT) signs and symptoms, including residual urine, overactive bladder and nocturia. One of the mechanisms of this LUT dysfunction that has not been discussed in dept so far is the role of dopamine (DA). METHODS: In this narrative review, we explore the dopaminergic hypothesis in the development of this combination of LUT signs and symptoms in older adults. RESULTS: DA is one of the neurotransmitters whose regulation and production is disrupted in aging. In synucleinopathies, altered DAergic activity is associated with the occurrence of LUTS and sleep disorders. Projections of DAergic neurons are involved in the regulation of sleep, diuresis, and bladder activity. The low dopamine hypothesis could explain the genesis of a set of LUT signs and symptoms commonly seen in this population, including elevated residual urine, Overactive bladder syndrome and Nocturia (discussed as the RON syndrome). This presentation is however also common in older patients without synucleinopathies or neurological disorders and therefore we hypothesise that altered DAergic activity because of pathological aging, and selective destruction of DAergic neurons, could underpin the presentation of this triad of LUT dysfunction in the older population. CONCLUSION: The concept of RON syndrome helps to better understand this common phenotypic presentation in clinical practice, and therefore serves as a useful platform to diagnose and treat LUTS in older adults. Besides recognizing the synucleinopathy "red flag" symptoms, this set of multi-causal LUT signs and symptoms highlights the inevitable need for combination therapy, a challenge in older people with their comorbidities and concomitant medications.

Electroacupuncture protects against bladder dysfunction induced by acute urinary retention via TRPV1/ATP signaling pathway: An animal and human research study.

Electroacupuncture (EA) can protect against acute urinary retention (AUR); however, the underlying mechanism remains unclear. Non-vesicular ATP release mediated by transient receptor potential (TRP) channels were identified as a key contributor to signaling in urothelial cells. In this study, the AUR model was established by urethral outlet obstruction in female Sprague-Dawley rats. EA was performed at SP6 and BL32 for 0.5 h prior to induction of AUR. EA reduced TRPV1 expression and urinary ATP concentrations in rat bladder, decreased the peak intravesical pressure during AUR, and attenuated abnormal voiding patterns and bladder pathological injury induced by AUR. Besides, 179 patients who experienced postoperative urinary retention were recruited and found that EA reduced urinary ATP concentrations and accelerated the recovery of spontaneous voiding. These observations indicate that EA exerts protection against AUR-induced bladder dysfunction by reducing urinary ATP concentrations through the regulation of TRPV1.

Incomplete bladder emptying and urinary tract infections after botulinum toxin injection for overactive bladder: Multi-institutional collaboration from the SUFU research network.

INTRODUCTION: Onabotulinumtoxin A (BTX-A) is an effective therapy for overactive bladder (OAB), however, adverse events may prevent patients from initiating therapy. The study objective was to report real-world rates of incomplete emptying and urinary tract infection (UTI) in men and women undergoing BTX-A for OAB. METHODS: Eleven clinical sites performed a retrospective study of adults undergoing first-time BTX-A injection (100 units) for idiopathic OAB in 2016. Exclusions included: postvoid residual (PVR) > 150 ml, prior BTX-A, pelvic radiation, or need for preprocedure catheterization. Primary outcomes at 6 months were incomplete emptying (clean intermittent catheterization [CIC] or PVR ≥ 300 ml without the need for CIC); and UTI (symptoms with either positive culture or urinalysis or empiric treatment). We compared rates of incomplete emptying and UTI within and between sexes, using univariate and multivariable models. RESULTS: 278 patients (48 men and 230 women) met inclusion criteria. Mean age was 65.5 years (range: 24-95). 35% of men and 17% of women had incomplete emptying. Men had 2.4 (95% CI: 1.04-5.49) higher odds of incomplete emptying than women. 17% of men and 23.5% of women had ≥1 UTI, the majority of which occurred within the first month following injection. The strongest predictor of UTI was a history of prior UTI (OR: 4.2 [95% CI: 1.7-10.3]). CONCLUSIONS: In this multicenter retrospective study, rates of incomplete emptying and UTI were higher than many previously published studies. Men were at particular risk for incomplete emptying. Prior UTI was the primary risk factor for postprocedure UTI.

Acute urinary retention and urinary tract infection after short-course urinary drainage in colon or high rectum anastomoses: Post hoc analysis of a multicentre prospective database from the GRACE group.

AIM: The aim was to define the risk factors for acute urinary retention (AUR) and urinary tract infections (UTIs) in colon or high rectum anastomosis patients based on the absence of a urinary catheter (UC) or the early removal of the UC (<24 h). METHOD: This is a multicentre, international retrospective analysis of a prospective database including all patients undergoing colon or high rectum anastomoses. Patients were part of the enhanced recovery programme audit, developed by the Francophone Group for Enhanced Recovery after Surgery, and were included if no UC was inserted or if a UC was inserted for <24 h. RESULTS: In all, 9389 patients had colon or high rectum anastomoses using laparoscopy, open surgery or robotic surgery. Among these patients, 4048 were excluded because the UC was left in place >24 h (43.1%) and 97 were excluded because the management of UC was unknown (1%). Among the 5244 colon or high rectum anastomoses patients included, AUR occurred in 5.2% and UTI occurred in 0.7%. UCs were in place for <24 h in 2765 patients (52.7%) and 2479 did not have UCs in place (47.3%). Multivariate analysis showed that management of the UC was not significantly associated with the occurrence of AUR and that risk factors for AUR were male gender, ≥65 years old, having an American Society of Anesthesiologists score ≥3 and receiving epidural analgesia. Conversely, being of male gender was a protective factor of UTI, while being ≥65 years old, having open surgery and receiving epidural analgesia were risk factors for UTIs. The management of the UC was not significantly associated with the occurrence of UTIs but the occurrence of AUR was a more significant risk factor for UTIs. CONCLUSION: UCs in place for <24 h did not reduce the occurrence of AUR or UTI compared to the absence of UCs.

Association between obstetrical anal sphincter injury and postpartum urinary retention: a contemporary nationwide cohort study.

INTRODUCTION AND HYPOTHESIS: Identification and prompt management of postpartum urinary retention after vaginal birth is essential to minimize long-term morbidity. Obstetrical anal sphincter injuries (OASIS) have been identified as a possible risk factor for urinary retention. The objective of this study was to estimate the association between OASIS and postpartum urinary retention and compare the length of hospital stay and cost of admission between postpartum patients who experienced urinary retention and those who did not. METHODS: We conducted a population-based, retrospective cohort study of pregnant individuals delivering singleton fetuses via vaginal birth in the United States using the National Inpatient Sample (NIS) database. Multivariate logistic regression models were used to estimate the odds ratio (OR) for the association between OASIS and postpartum urinary retention. Simple linear regression was used to compare means. RESULTS: A total of 2,013,052 delivery admissions were included, which was representative of a population size of 10,065,253 utilizing the complex sampling design of the NIS database. 47,192 (2.34%) admissions sustained OASIS and 5,339 (0.27%) admissions experienced overt urinary retention. After adjusting for potential confounders, vaginal deliveries where OASIS occurred had 3.60 times the odds of postpartum urinary retention compared with vaginal deliveries where OASIS was not sustained (95% CI 3.26-3.97). Postpartum urinary retention was associated with an increased mean length of stay (2.94 vs 2.28 days, p<0.001) and 1.37 times the mean total cost of admission (US$22,946.38 vs US$16,758.85, p<0.001). CONCLUSIONS: Obstetrical anal sphincter injuries are associated with increased odds of postpartum urinary retention compared with vaginal deliveries where OASIS did not occur.