Primary bladder neck obstruction in men: The importance of urodynamic assessment and cystourethrography in measuring its severity.

OBJECTIVE: Primary bladder neck obstruction (PBNO) is a condition primarily affecting young men, characterized by obstruction at the bladder neck, leading to lower urinary tract symptoms. The aim of this study was to identify a correlation between the severity of bladder neck opening impairment and urinary symptoms by means of urodynamic studies. MATERIALS AND METHODS: A retrospective analysis was conducted in adult males diagnosed with PBNO at a university neurourology department between 2015 and 2022 who underwent voiding cystourethrography (VCUG) and pressure-flow studies. The cohort was divided into two groups: absence of bladder neck opening on VCUG (Group A) and incomplete bladder neck opening (Group B). RESULTS: Out of the 82 patients with PBNO screened, 53 were included in the analysis. Nocturia was the only symptom more prevalent in Group A (65% in Group A vs. 30% in Group B, p = 0.02) but scores and subscores of the Urinary Symptom Profile questionnaire were not different between groups. In addition, the detrusor pressure at a maximum flow rate (PdetQmax), bladder outlet obstruction index (BOOI), and bladder contractility index (BCI) were higher in Group A than in Group B [PdetQmax (A = 93.7 ± 53.7 cmH2O vs. B = 65.7 ± 26.4 cmH2O; p = 0.01)-BOOI (A = 77 ± 58.3 vs. B = 48 ± 25.7; p = 0.03)-BCI (A = 136 ± 51.3 vs. B = 110 ± 41.7; p = 0.04)]. CONCLUSION: This study demonstrates a significant association between the extent of bladder neck opening impairment observed on VCUG and obstruction and contraction urodynamic parameters, but no association with the severity of urinary symptoms. Future studies should evaluate the predictive value of treatment response and the occurrence of complications based on clinical and urodynamic parameters.

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.

Influence of urodynamic conditions on bladder sensations and detrusor activity in patients with multiple sclerosis.

AIMS: The study aimed to assess the impact of bladder filling rate and fluid temperature during urodynamics on bladder sensations and volume of apparition of detrusor overactivity in patients with multiple sclerosis (PwMS). METHODS: Consecutive PwMS assessed with a standardized urodynamic test including three consecutive cystometries (20 ml/min, 100 ml/min, and 100 ml/min with 4°C fluid (Ice water test [IWT]) between June 2020 and March 2022 were included in this retrospective study. Data collected were bladder sensation with first desire to void (FDV) and strong desire to void (SDV). The presence of detrusor overactivity (DO) and the volume of the first uninhibited detrusor contraction were recorded. RESULTS: One hundred and fifty-seven patients (mean age 47.4 ± 11.8 years, median EDSS 3 IQR[2-5], 73.9% of women) were included. Increased filling rate induced delayed bladder sensations (FDV 219 ± 109 ml vs. 194 ± 100 ml; SDV 349 ± 113 ml vs. 322 ± 124 ml for 100 ml/min and 20 ml/min filling rate, respectively, p < 0.001). Ice water increased bladder sensations with earlier reports of needs to void (FDV 163 ± 99 ml vs. 218 ± 117 ml; SDV 263 ± 104 ml vs. 351 ± 112 ml respectively; p < 0.001). Thirty-four patients had DO during both 20 ml/min and 100 ml/min fillings, without difference in the volume of apparition (p = 0.78). Forty-four patients had DO during both 100 ml/min and IWT. Detrusor overactivity appeared for a reduced volume during IWT compared with room temperature fluid perfusion (-68 ml [-95 to -41]; p < 0.001). CONCLUSION: Filling rate and fluid temperature impact bladder sensations during cystometry in PwMS. Ice water decreased the volume of the first uninhibited detrusor contraction.

Upper urinary tract function of patients with multiple sclerosis.

BACKGROUND: Neurogenic lower urinary tract dysfunction (NLUTD) is frequent in multiple sclerosis (MS) and renal prognosis is a key point of bladder management. OBJECTIVE: To assess upper urinary tract damage risk using voiding cystourethrography (VCUG) in patients with (PwMS) and NLUTD. METHODS: We conducted a retrospective study between 2010 and 2020. Demographic data, urinary symptoms, urinary tract infection (UTI), renal ultrasounds findings, glomerular filtration rate (GFR), VCUG data, and urodynamic parameters were collected in PwMS with NLUTD. RESULTS: Among 325 PwMS included, 67% were female, mean age was 51.6 ± 12.0 years, and mean EDSS 4.6 ± 1.8. VCUG showed vesicoureteral reflux (VUR) in 18 patients. A link was found between VUR and progressive MS course (p = 0.04), hydronephrosis (odds ratio [OR] = 17.44; 95% confidence interval [CI] = 3.46-87.87; p = 0.001), low GFR (p < 0.001), and detrusor overactivity (p = 0.04). No association with UTIs, EDSS, detrusor sphincter dyssynergia, were elicited. On multivariate analysis, alteration of GFR was independently related to the presence of VUR (OR = 0.95; 95% CI = 0.92-0.98). CONCLUSIONS: VUR elicited on VCUG is associated with lower GFR and hydronephrosis. However, due to the low prevalence (5.5%) of this abnormality in PwMS, VCUG should be performed in selected cases and not in routinary practice.

Assessment of sacral spinal excitability using stimulus-response curves of the bulbocavernosus reflex.

OBJECTIVE: To analyze and quantify sacral spinal excitability through bulbocavernosus reflex (BCR) stimulus-response curves. METHODS: Thirty subjects with upper motor neuron lesions (UMN) and nine controls were included in this prospective, monocentric study. Sacral spinal excitability was assessed using stimulus-response curves of the BCR, modeled at different bladder filling volumes relative to the desire to void (as defined by the International Continence Society) during a cystometry. Variations in α (i.e. the slope of the stimulus-response curve) were considered as an indicator of the modulation of sacral spinal excitability. RESULTS: In all subjects, α increased during bladder filling suggesting the modulation of spinal sacral excitability during the filling phase. This increase was over 30% in 96.7% of neurological subjects and 88.9% of controls. The increase was higher before the first sensation to void in the neurological population (163.15%), compared to controls, (29.91%), p < 0.001. CONCLUSIONS: We showed the possibility of using BCR stimulus-response curves to characterize sacral spinal response with an amplification of this response during bladder filling as well as a difference in this response amplification in patients with UMN in comparison with a control group. SIGNIFICANCE: BCR, through stimulus-response curves, might be an indicator of pelvic-perineal exaggerated reflex response and possibly a tool for evaluating treatment effectiveness.

Use of a specific questionnaire and perineal electromyography to assess neuropathic pain after radical retropubic prostatectomy.

OBJECTIVE: Prostate cancer is the most frequent cancer in men and radical retropubic prostatectomy (RRP) is one of the first-line treatment. However, RRP has some side effects and can lead to chronic perineal pain. The objective of the study was to determine in patients suffering from perineal pain after RRP the possibility of a neurogenic damage by means of a specific questionnaire dedicated to track down neuropathic pain. METHODS: Forty patients were explored by a specific and validated questionnaire, the Neuropathic Pain Symptom Inventory (NPSI). Patients were divided into two groups: Group A with an NSPI score ≥4 was considered as suffering from neuropathic pain, and Group B was considered as a control group without neuropathic pain (NSPI score <4). All patients had a perineal electrophysiological testing to confirm the possibility of a neurogenic damage. RESULTS: Group A was composed by 13 men and Group B by 27 men, with mean age 72.45 years and mean duration of pain 2.7 years. In Group A, the most frequent symptoms were burning sensation, electrical shock and numbness. Location of the pain was global perineal area (8/13), anus (10/13), penis (5/13) and glans penis (2/13). Electromyography (EMG) findings confirmed the presence of denervation and neurogenic damages compared with controls (p < 0.001). CONCLUSION: One third of the patients consulting for chronic pain following RRP had probably a neuropathic lesion leading to a chronic perineal pain as suggested by an NSPI score ≥ 4 and EMG alterations.

Influence of the urine stream interruption exercise on micturition.

OBJECTIVES: To assess the effect of urine stream interruption exercise on micturition. METHODS: This study was conducted prospectively in female patients without urinary disorders. Two uroflowmetries were performed: one during a usual micturition and one during an exercise of urine stream interruption. For the urine stream interruption exercise the subject was asked to begin the micturition, to stop it at 3 s, when the stream is interrupted, to start voiding again, then again stop it at 3 s and repeat this manoeuvre until the end of the micturition. RESULTS: Twenty female patients (mean age 38.7 years old, SD 12.3) were included. Post void residual volume was higher after the urine stream interruption micturition (mean 36.7 mL, SD 46.6) than during standard micturition (mean 8.2 mL, SD 24.1) (P = 0.02). During normal voiding, the maximal flow rate was higher (26.9 mL/min vs 17.8 mL/min; P < 0.0001). There was no difference concerning neither the voiding volume nor the slope of ascending part of flow curve. During urine stream interruption micturition, the flow rate slope, the voiding volume and the maximal flow rate by voiding sequence were decreasing as the voiding sequences followed each other. CONCLUSIONS: Urine stream interruption increases the post-void residual volume and translates into less efficient micturition. Thus, it should not be used in current practice of pelvic floor muscles training.

Urethro-vaginal reflux during micturition: An underestimated cause of urinary incontinence in adult women.

AIMS: To evaluate if urethrovaginal reflux (UVR) is an underestimated cause of insensible or postmicturition incontinence in adult women. METHODS: An observational and retrospective study was carried out on the computerized records of a neuro-urology department. Female patients who had insensible or postmicturition incontinence were investigated. Retrograde and voiding urethrocystography (UCG), urodynamic evaluation, urethral pressure profilometry, and anamnestic and clinical examination had to be available. RESULTS: Among the 79 adult female patients with insensible or postmicturition incontinence in whom the whole set of required evaluations was achieved, 16 had a UVR (mean age 47 ± 15 years). There were no urethral diverticula, urethrocele, vesicovaginal, or urethrovaginal fistula on their UCG. All of them also had a cystoscopy and a CT urography which did not establish any abnormality. CONCLUSIONS: UVR is not an exclusive pathology of children. This mechanism seems to be an underestimated cause of urinary incontinence in adult women. Retrograde and voiding UCG appears to be the gold standard to confirm the intravaginal reflux.

Diffusion-Weighted Magnetic Resonance Imaging: A New Tool for the Diagnosis of Bladder Pain Syndrome/Interstitial Cystitis.

OBJECTIVES: To determine whether diffusion-weighted magnetic resonance imaging (DWMRI), a noninvasive procedure, can contribute to the diagnosis of bladder pain syndrome/interstitial cystitis (BPS/IC). METHODS: The pelvic DWMRI of patients with chronic pelvic pain syndrome was selected between January 2012 and June 2017. A radiologist analyzed the bladder wall signal; he was blinded to the patients' clinical data. According to the 2008 European Society for the Study of Bladder Pain Syndrome/Interstitial Cystitis criteria, 2 groups of patients were determined: BPS/IC and no BPS/IC. The association between BPS/IC and the wall signal intensity was compared. RESULTS: In the 106 patients included, 82 had criteria for BPS/IC and 24 did not. A significant difference in the distribution of the signal was found between the 2 groups (p = 0.01). High signal intensity of the bladder wall was related to the presence of a BPS/IC with a sensitivity of 28% and a specificity of 88%. No signal intensity of the bladder wall was related to the absence of a BPS/IC with a sensitivity of 96% and a specificity of 29%. CONCLUSIONS: In -DWMRI, high bladder wall signal intensity helps to affirm a BPS/IC, whereas the absence of signal helps to exclude the diagnosis. Further studies are needed to confirm these preliminary results.

Urinary Disorders and Marfan Syndrome: A Series of 4 Cases.

Marfan syndrome is a genetic disease responsible for causing cardiovascular, eye and musculoskeletal damages. Urinary disorders are not common. We present 4 cases of chronic urinary tract symptoms, with 2 different pathophysiological processes. Three patients presented with spinal cord infarct following aortic dissection surgery. They were affected by an overactive bladder with detrusor overactivity and detrusor-sphincter dyssynergia. One patient complained of voiding dysfunction, possibly related to dural ectasia. Although a rare outcome, urinary disorders may appear in Marfan syndrome, by the occurrence of surgical complications in aortic surgery or possibility of sacral nerve root compression. If so, medical care is necessary to prevent uro-nephrological complications.

Effectiveness and Complications of Percutaneous Needle Tenotomy with a Large Needle for Muscle Contractures: A Cadaver Study.

BACKGROUND: Twenty-two percent of institutionalised elderly persons have muscle contractures. Contractures have important functional consequences, rendering hygiene and positioning in bed or in a chair difficult. Medical treatment (such as botulinum toxin injections, physiotherapy or positioning) is not very effective and surgery may be required. Surgery is carried out in the operating theatre, under local or general anaesthesia but is often not possible in fragile patients. Mini-invasive tenotomy could be a useful alternative as it can be carried out in ambulatory care, under local anaesthesia. OBJECTIVE: To evaluate the effectiveness of percutaneous needle tenotomy and the risks of damage to adjacent structures in cadavers. METHOD: Thirty two doctors who had never practiced the technique (physical medicine and rehabilitation specialists, geriatricians and orthopaedic surgeons) carried out 401 tenotomies on the upper and lower limbs of 8 fresh cadavers. A 16G needle was used percutaneous following location of the tendons. After each tenotomy, a neuro-orthopaedic surgeon and an anatomist dissected the area in order to evaluate the success of the tenotomy and any adjacent lesions which had occurred. RESULTS: Of the 401 tenotomies, 72% were complete, 24.9% partial and 2.7% failed. Eight adjacent lesions occurred (2%): 4 (1%) in tendons or muscles, 3 (0.7%) in nerves and 1 (0.2%) in a vessel. CONCLUSION: This percutaneous needle technique effectively ruptured the desired tendons, with few injuries to adjacent structures. Although this study was carried out on cadavers, the results suggest it is safe to carry out on patients.