Development of a predictive tool for sacral nerve modulation implantation in the treatment of non-obstructive urinary retention and/or slow urinary stream: a study from the Neuro-Urology Committee of the French Association of Urology.

PURPOSE: This study aimed to seek predictive factors and develop a predictive tool for sacral nerve modulation (SNM) implantation in patients with non-obstructive urinary retention and/or slow urinary stream (NOUR/SS). METHODS: This study was designed as a retrospective study including all patients who have undergone a two-stage SNM for NOUR/SS between 2000 and 2021 in 11 academic hospitals. The primary outcome was defined as the implantation rate. Secondary outcomes included changes in bladder emptying parameters. Univariate and multivariable logistic regression analysis were performed and determined odds ratio for IPG implantation to build a predictive tool. The performance of the multivariable model discrimination was evaluated using the c-statistics and an internal validation was performed using bootstrap resampling. RESULTS: Of the 357 patients included, 210 (58.8%) were finally implanted. After multivariable logistic regression, 4 predictive factors were found, including age (≤ 52 yo; OR = 3.31 CI95% [1.79; 6.14]), gender (female; OR = 2.62 CI95% [1.39; 4.92]), maximal urethral closure pressure (≥ 70 cmH2O; OR: 2.36 CI95% [1.17; 4.74]), and the absence of an underlying neurological disease affecting the lower motor neuron (OR = 2.25 CI95% [1.07; 4.76]). Combining these factors, we established 16 response profiles with distinct IPG implantation rates, ranging from 8.7 to 81.5%. Internal validation found a good discrimination value (c-statistic, 0.724; 95% CI 0.660-0.789) with a low optimism bias (0.013). This allowed us to develop a predictive tool ( https://predictivetool.wixsite.com/void ). CONCLUSION: The present study identified 4 predictive factors, allowing to develop a predictive tool for SNM implantation in NOUR/SS patients, that may help in guiding therapeutic decision-making. External validation of the tool is warranted.

Primary care-based follow-up for prostate and kidney cancer survivors: a retrospective monocentric study.

PURPOSE: New follow-up models of care are needed to ensure long-term comprehensive care for cancer survivors. We investigated the impact of a general practitioner (GP)-led follow-up program for prostate cancer (PCa) and renal cell cancer (RCC) survivors. METHODS: This retrospective monocentric study compared standard urologist-led follow-up to experimental GP-led follow-up within a nurse-led network for PCa and RCC survivors. To assess the safe continuity of follow-up, the number of patients lost to follow-up (LFU) was collected. A microcosting analysis from the French national health system perspective was conducted to describe incremental costs associated with experimental follow-up. A satisfaction survey was conducted to determine participating patient's and GP's satisfaction scores, ranging from 0 to 4 and 0 to 5, respectively. RESULTS: Among the 1274 patients included, 92/753 (12.2%) were LFU during standard follow-up vs 0/521 (0%) during experimental follow-up (p < 0.001). In the latter, the median management delay of suspected recurrence for PCa and RCC survivors was 20 [12-27] and 16 [10.5-31.25] days, and the mean incremental cost on a per-patient basis was 34.68 ± 105.87€ and 64.24 ± 93.55€, respectively. Patient and GP mean satisfaction scores were 3.6/4 and 3.9/5, respectively. CONCLUSION: The GP-led follow-up of PCa and RCC survivors within a nurse-led network seems to provide safe continuity of follow-up and seems not to be associated with major incremental costs. The surveys indicated high level of patient's satisfaction and encouraging results regarding GP's satisfaction. Randomized clinical trials are needed to confirm these findings and promote larger implementation of this type of follow-up care.

Trans-rectal Ultrasound-Guided Autologous Blood Injection in the Interprostatorectal Space Prior to Percutaneous MRI-Guided Cryoablation of the Prostate.

OBJECTIVE: To report a novel technique of ultrasound-guided injection of autologous blood in the interprostatorectal space, in an attempt to facilitate ablative prostatic procedures by widening durably the space between the rectum and the prostate. MATERIALS AND METHODS: Between April and November 2016, four consecutive patients underwent the haemoprotection injection technique. For each patient, we recorded the time to perform the technique, the amount of injected blood, the achieved distances between the rectum and the prostate post-injection at fixed defined points (apex, middle, and base of prostate at the midline, left, and right sides of the gland), the extension of the ice ball outside the prostate capsule at those fixed points, and whether any residual blood was present on 1-month follow-up MRI. RESULTS: Mean time to perform haemoprotection injection was 54 min, with an average blood volume of 103 cc. Mean distance achieved at the apex, middle, and base of the prostate, respectively, was 12, 13, and 16 mm in the midline; 8, 10, and 13 mm on the left side; and 9, 10, and 13 mm on the right side. The mean extension distance of the ice ball beyond the capsule was 4, 6, and 6 mm in the midline; 4, 5, and 6 mm on the left side; and 1, 3, and 3 mm on the right side. No residual blood was present on 1-month follow-up MRI in all patients. No rectal fistula occurred. CONCLUSION: Haemoprotection may create a safe and effective virtual space between the prostate and rectum.