[Minimally invasive treatment of benign prostatic hyperplasia : The German S2e guideline 2023-part 4]. / Minimalinvasive Therapien des benignen Prostatasyndroms : Die deutsche S2e-Leitlinie 2023 ­ Teil 4/4.

BACKGROUND: Lower urinary tract symptoms suggestive for benign prostatic obstruction (LUTS/BPO) are one of the most frequent diseases in men and can have a significant impact on quality of life. Instrumental therapies are common, and many patients seek minimally invasive treatment options. OBJECTIVE: Presentation and evidence-based evaluation of the minimally invasive therapy for benign prostatic syndrome. MATERIALS AND METHODS: Summary and overview of chapters 11-13 on minimally invasive therapies for LUTS/BPO of the current long version of the German S2e guideline. RESULTS: In case of absolute indication for surgery or after unsatisfactory or undesired medical therapy, minimally invasive treatments such as UroLift® (Neotract Inc., Pleasanton, CA, USA), Rezá¿¡m™ (Boston Scientific, Malborough, MA, USA), iTIND™ (Olympus America Inc., Westborough, MA, USA), and prostatic artery embolization (PAE) can be considered. These indirect/delayed ablative therapies offer lower morbidity and the possibility of performing them under local anesthesia, but they are inferior to direct ablative/resective techniques in terms of effectiveness and sustainability. CONCLUSIONS: The updated German S2e guideline summarizes evidence-based recommendations for new minimally invasive therapies for LUTS/BPO, which present alternative treatment options for selected patients.

[Evaluation of the GeSRU-Steps educational video concept (German Society of Residents in Urology e. V.)]. / Evaluierung des GeSRU-Steps-Lehrvideokonzepts (German Society of Residents in Urology e. V.).

BACKGROUND: Surgical educational videos represent a contemporary, multimedia supplement to surgical education and training. The German Society of Residents in Urology e. V. (GeSRU) developed an educational video platform (steps.GeSRU.de) with free, quality-assured educational videos for urologists, especially for residents. OBJECTIVES: The purpose of this study was to evaluate the GeSRU Steps teaching videos. MATERIALS AND METHODS: Prospectively, 29 GeSRU Steps training videos were made available (03/2019-05/2023) via amboss.com, and an online questionnaire was inserted following the videos. This comprised 12 items on medical, technical, and didactic quality, usefulness for own knowledge acquisition, and sociodemographic data of respondents. Aspects of video quality were assessed with the Acceptability E­scale and the Global Quality Score. RESULTS: During the survey period, the GeSRU Steps videos implemented on the amboss.com website were viewed 49,698 times. A total of 474 questionnaires were answered (rate 0.25%). The collective of respondents consisted of 419 (88%) students, 47 (10%) physicians in training, and 5 (1%) specialists; 351 (74%) were female, 107 (23%) were male, and 4 (1%) were diverse. Each educational video was rated a median of 10 times (range 5-65). The six questions of the Acceptability E­scale and the Global Quality Score were rated good and very good (81.6-95.8%), respectively. CONCLUSIONS: GeSRU teaching videos achieved a very good rating with high user satisfaction. By specific promotion of these teaching videos, which are quality-assured through supervision, the portfolio of surgical videos available at a low threshold can be expanded and can serve as a contemporary education tool.

Radical Prostatectomy on YouTube: Education or Disinformation?

Background: YouTube is the second most popular website worldwide. It features numerous videos about radical prostatectomy.The aim of this study was to assess the quality of these videos and screen their benefit for patients and doctors.Methods: All videos on YouTube about radical prostatectomy were analysed using a specially developed software (python 2.7,numpy). According to a predefined selection process most relevant videos were analyzed for quality and reliability using SuitabilityAssessment of Materials (SAM)-Score, Global Quality Score and others.Results: Out of 3520 search results, 179 videos were selected and analysed. Videos were watched a median of 5836 times (interquartilerange (IQR): 11945.5; 18–721546). The median duration was 7.2 minutes (min). 125 of the videos were about roboticprostatectomy. 69 videos each were directly addressed to patients and doctors. Medical content generally was of low quality,while technical quality and total quality were at a high level. Reliability was good.Conclusions: Videos on radical prostatectomy on YouTube allow for patient information. While technical quality and reliabilityare classified as acceptable, medical content was low and warranted preselection. In contrast to Loeb et al. we did notobserve a negative correlation between number of views and scientific quality in different scores. Our findings support the needfor preselection of videos on YouTube as the potential benefit may vary between videos with the significant risk of low medicalquality. (AU)

[Conservative and pharmacological treatment of benign prostatic hyperplasia : The German S2e-guideline 2023-part2]. / Konservative und medikamentöse Therapie des benignen Prostatasyndroms : Die deutsche S2e-Leitlinie 2023 ­ Teil 2.

BACKGROUND: Lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia (BPH, in German guidelines: benign prostatic syndrome [BPS]) is considered the most common disease of the lower urinary tract in men and can have a tremendous impact on the quality-of-life of affected patients. Conservative and pharmacological therapy of this disease are of great importance, both in improving LUTS and reducing progression-related complications. OBJECTIVES: Presentation of the conservative and pharmacological treatment options according to the current German S2e guideline on BPS. MATERIALS AND METHODS: Summary and overview of chapters 9 and 10 of the current German S2e guideline on BPS. RESULTS: In addition to a controlled watchful waiting for BPS patients without an absolute indication for prostate surgery, a variety of phytopharmacological formulations and synthetic drugs according to the symptomatology and clinical progress are available. Phytotherapy should, due to inconsistent study data, only be considered for mild to moderate symptoms. Synthetic drugs include alpha-blockers, 5α-reductase inhibitors, phosphodiesterase inhibitors, antimuscarinics and, more recently, the ß3-agonist mirabegron in the current guideline. In addition, various combination therapies are listed and evaluated according to their indications, effects and side effects. CONCLUSIONS: The current German S2e guideline on the diagnosis and treatment of BPS provides an evidence-based foundation for finding the best possible and most effective medication.

[Surgical treatment options of lower urinary tract symptoms due to benign prostatic obstruction : The German S2e guideline 2023-part 3]. / Operative Therapie des benignen Prostatasyndroms ­ klassische Desobstruktion : Die deutsche S2e-Leitlinie 2023 ­ Teil 3.

BACKGROUND: Lower urinary tract symptoms (LUTS) due to benign prostatic obstruction (BPO) are one of the most common diagnoses in clinical practice. Bothersome LUTS impact considerably quality of life of men and may cause severe complications without treatment. According to the diagnostic assessment every patient should be treated with an adequate therapy. Management comprises a conservative approach, medication, novel minimally invasive options, and surgical procedures with the aim to remove the obstructing adenoma. The German guideline panel has updated the German guidelines on diagnostic evaluation and management of LUTS due to BPO. OBJECTIVES: Evidence-based recommendations of surgical treatment options of LUTS due to BPO are evaluated. MATERIALS AND METHODS: Chapters 11.1.1 and 11.2 of the updated German S2e guideline on the management of LUTS due to BPO are summarized as a review article. RESULTS: A treatment algorithm based on current evidence has been proposed. It is considered to provide guidance for the selection of the best procedure according to the needs of the patient. Anatomic features of the prostate, the patients' morbidity, and the preservation of ejaculatory function are taken into account for the choice of the best procedures. These surgical options can be divided into techniques with direct, delayed or no removal of the adenoma, procedures with suprapubic access, and embolizing approaches. CONCLUSIONS: The updated German S2e guideline on the management of LUTS due to BPO provides evidence-based recommendations for the selection of the best procedure according to the needs of the individual patient.

[Diagnostic work-up of benign prostatic hyperplasia : The German S2e-guideline 2023 part 1]. / Diagnostik des benignen Prostatasyndroms : Die deutsche S2e-Leitlinie 2023 Teil 1.

BACKGROUND: Lower urinary tract symptoms (LUTS) suggestive of benign prostatic hyperplasia (BPH; in German guidelines: benign prostatic syndrome [BPS]) is the most frequent urological disease in men and can result in a considerable deterioration of quality-of-life. BPS can be associated with LUTS, benign prostatic enlargement (BPE), and bladder outlet obstruction (BOO) or benign prostatic obstruction (BPO), respectively. The expert group on BPS of the German Society of Urology has re-evaluated the tests for the assessment of BPH and provides evidence-based recommendations. OBJECTIVES: Presentation and evidence-based rating of tests for the assessment of patients with BPS. MATERIALS AND METHODS: Summary and overview of chapters 5, 6, and 8 of the latest long version of the German S2e guideline on BPS. RESULTS: The diagnostic work-up should clarify (1) whether the complaints of the patient are caused by BPS, (2) how relevant the complaints are and whether treatment is necessary, (3) whether complications of the lower or upper urinary tract already exist, and (4) which treatment will be most suitable. Baseline assessment should be done in all BPS patients and include history, measurement of LUTS and quality-of-life, urinalysis, serum prostate-specific antigen, post-void residual, ultrasound of the lower urinary tract, including measurements of prostate volume, intravesical prostatic protrusion and detrusor wall thickness, and ultrasound of the upper urinary tract. Additional tests can follow when questions remain unanswered after baseline assessment. These optional tests include bladder diaries, uroflowmetry, serum creatinine, urethrocystoscopy, other noninvasive tests for the determination of BOO/BPO such as penile cuff test, condom catheter method and near-infrared spectroscopy, and other imagining tests such as X­ray and MRI investigations. CONCLUSIONS: The updated German S2e guideline summarizes evidence-based recommendations on the diagnostic work-up, including the assessment of the BPS components BPE, LUTS, and BOO/BPO.

Antioxidant Supplementation on Male Fertility-A Systematic Review.

Our aim was to review the current literature regarding the effect of antioxidant supplementation (AS) on male fertility parameters, as AS is commonly used to treat male infertility due to the availability and affordability of antioxidants in many parts of the world. MATERIALS AND METHODS: PubMed, Medline, and Cochrane electronic bibliographies were searched using the modified Preferred Reporting Items for Systemic Reviews and Meta-Analyses (PRISMA) guidelines to evaluate studies on the benefit of antioxidant therapy on infertile men. Results were analyzed regarding the following aspects: (a) ingredient and dose; (b) potential mechanism of action and rationale for use; and (c) effect on various reported outcomes. RESULTS: Thus, 29 studies found a substantial positive effect of AS on outcomes of assisted reproductive therapy (ART), WHO semen parameters, and live-birth rate. Carnitines, Vitamin E and C, N-acetyl cysteine, coenzyme Q10, selenium, zinc, folic acid, and lycopene were beneficial ingredients. Nevertheless, some studies did not show a substantial change in one or more factors. CONCLUSION: AS seems to have a positive effect on male fertility. Environmental factors may play an increasing role in fertility. Further studies are needed to determine the optimal AS combination and the influence of environmental factors.

Prospective Analysis of Versatility and User Satisfaction with a Novel Single-Use Cystoscope with Working Channel.

INTRODUCTION: In the present study, a prospective systematic assessment of the clinical utility of the Ambu® aScopeTM 4 Cysto Reverse Deflection with regard to image quality, maneuverability, and navigation in an outpatient and inpatient setting was performed. MATERIALS AND METHODS: A prospective multicenter study was performed for evaluation of the instrument during routine cystoscopy. We evaluated the clinical performance of the instruments using a standardized user questionnaire in different categories including image quality, treatment success, imaging of all areas of the urinary bladder, quality of navigation, flexibility of the endoscope, and satisfaction with the device. Statistical analyses were performed by SPSS using the Kruskal-Wallis and Wilcoxon-Mann-Whitney tests. A p value of p ≤ 0.05 was defined as statistically significant. RESULTS: A total of 200 cystoscopies were performed, and the questionnaire response rate was 100%. The image quality was rated as very good in 65.5% (n = 131), good in 30.5% (n = 61), and neutral in 4% (n = 8) of cases. The criteria for poor or very poor were not mentioned. The characteristic "treatment success based on image quality" was also evaluated as very good in 49% (n = 98) and good in 50.5% (n = 101). The analysis revealed a very good or good overall impression of the examiners in all cases. Replacement of the cystoscope was not necessary during any of the examinations. However, in 3 cases, technical difficulties were documented. Further analysis of the data showed that physicians with less professional experience rated the visualization of the urinary bladder (p = 0.007) and the treatment success with regard to image quality significantly worse (p = 0.007). CONCLUSION: The Ambu® aScope™ 4 Cysto Reverse Deflection shows high satisfaction values among users in clinical routine. In analogy to other studies with flexible endoscopes, urologists with more professional experience show higher satisfaction values than examiners with less training in flexible endoscopy.

Hospital rating websites play a minor role for uro-oncologic patients when choosing a hospital for major surgery: results of the German multicenter NAVIGATOR-study.

PURPOSE: Hospital rating websites (HRW) offer decision support in hospital choice for patients. To investigate the impact of HRWs of uro-oncological patients undergoing elective surgery in Germany. METHODS: From 01/2020 to 04/2021, patients admitted for radical prostatectomy, radical cystectomy, or renal tumor surgery received a questionnaire on decision-making in hospital choice and the use of HRWs at 10 German urologic clinics. RESULTS: Our study includes n = 812 completed questionnaires (response rate 81.2%). The mean age was 65.2 ± 10.2 years; 16.5% were women. Patients were scheduled for prostatectomy in 49.1%, renal tumor surgery in 20.3%, and cystectomy in 13.5% (other 17.1%). Following sources of information influenced the decision process of hospital choice: urologists' recommendation (52.6%), previous experience in the hospital (20.3%), recommendations from social environment (17.6%), the hospital's website (10.8%) and 8.2% used other sources. Only 4.3% (n = 35) used a HRW for decision making. However, 29% changed their hospital choice due to the information provided HRW. The most frequently used platforms were Weisse-Liste.de (32%), the AOK-Krankenhausnavigator (13%) and Qualitaetskliniken.de (8%). On average, patients rated positively concerning satisfaction with the respective HRW on the Acceptability E-Scale (mean values of the individual items: 1.8-2.1). CONCLUSION: In Germany, HRWs play a minor role for uro-oncologic patients undergoing elective surgery. Instead, personal consultation of the treating urologist seems to be far more important. Although patients predominantly rated the provided information of the HRW as positive, only a quarter of users changed the initial choice of hospital.

Discrepancy between German S3 Guideline Recommendations and Daily Urologic Practice in the Management of Nonmuscle Invasive Bladder Cancer: Results of a Binational Survey.

INTRODUCTION: Guideline recommendations are meant to help minimize morbidity and to improve the care of nonmuscle invasive bladder cancer (NMIBC) patients but studies have suggested an underuse of guideline-recommended care. The aim of this study was to evaluate the level of adherence of German and Austrian urologists to German guideline recommendations. METHODS: A survey of 27 items evaluating diagnostic and therapeutic recommendations (15 cases of strong consensus and 6 cases of consensus) for NMIBC was administered among 14 urologic training courses. Survey construction and realization followed the checklist for reporting results of internet e-surveys and was approved by an internal review board. RESULTS: Between January 2018 and June 2019, a total of 307 urologists responded to the questionnaire, with a mean response rate of 71%. The data showed a weak role of urine cytology (54%) for initial diagnostics although it is strongly recommended by the guideline. The most frequently used supporting diagnostic tool during transurethral resection of the bladder was hexaminolevulinate (95%). Contrary to the guideline recommendation, 38% of the participants performed a second resection in the case of pTa low-grade NMIBC. Correct monitoring of Bacille Calmette-Guérin (BCG) response with cystoscopy and cytology was performed by only 34% of the urologists. CONCLUSIONS: We found a discrepancy between certain guideline recommendations and daily routine practice concerning the use of urine cytology for initial diagnostics, instillation therapy with a low monitoring rate of BCG response, and follow-up care with unnecessary second resection after pTa low-grade NMIBC in particular. Our survey showed a moderate overall adherence rate of 73%. These results demonstrate the need for sharpening awareness of German guideline recommendations by promoting more intense education of urologists to optimize NMIBC care thus decreasing morbidity and mortality rates.

Radical Prostatectomy on YouTube: Education or Disinformation?

BACKGROUND: YouTube is the second most popular website worldwide. It features numerous videos about radical prostatectomy. The aim of this study was to assess the quality of these videos and screen their benefit for patients and doctors. METHODS: All videos on YouTube about radical prostatectomy were analysed using a specially developed software (python 2.7, numpy). According to a predefined selection process most relevant videos were analyzed for quality and reliability using Suitability Assessment of Materials (SAM)-Score, Global Quality Score and others. RESULTS: Out of 3520 search results, 179 videos were selected and analysed. Videos were watched a median of 5836 times (interquartile range (IQR): 11945.5; 18-721546). The median duration was 7.2 minutes (min). 125 of the videos were about robotic prostatectomy. 69 videos each were directly addressed to patients and doctors. Medical content generally was of low quality, while technical quality and total quality were at a high level. Reliability was good. CONCLUSIONS: Videos on radical prostatectomy on YouTube allow for patient information. While technical quality and reliability are classified as acceptable, medical content was low and warranted preselection. In contrast to Loeb et al. we did not observe a negative correlation between number of views and scientific quality in different scores. Our findings support the need for preselection of videos on YouTube as the potential benefit may vary between videos with the significant risk of low medical quality.

[Outpatient before inpatient treatment?-Reality of care and economic analysis for minor urological interventions in Germany between 2013 and 2018]. / Ambulant vor stationär? ­ Versorgungswirklichkeit und ökonomische Analyse von kleinen urologischen Eingriffen in Deutschland von 2013 bis 2018.

BACKGROUND: Although outpatient provision of services is economically desirable, many minor urological interventions in Germany are currently carried out on an inpatient basis. The aim of our study is to investigate whether the current health policy framework contributes to more outpatient treatment. MATERIALS AND METHODS: We used a sample of 4.9 million anonymous, insured persons representative according to age and region provided by the Institute for Applied Health Research (InGef GmbH). We report extrapolations for the number of outpatient and inpatient services throughout Germany between 2013 and 2018. In addition, we performed an economic analysis for two selected interventions. RESULTS: During the study period, the total number of prostate biopsies declined from 184,573 to 174,558 cases. The share of outpatient biopsies declined continuously by 0.9% per year from 81% to 76% (p < 0.001). For botulinum toxin injection into the bladder, the total increased from 15,630 to 26,824 cases. The share of outpatient treatments increased by 2.7% per year from 3% to 19% (p = 0.01). For the other examined interventions (insertion of suprapubic urinary catheters, the insertion, removal, and changing of ureteral stents, cystoscopies and urethral dilatation), there were no significant changes in the share of outpatient procedures. CONCLUSIONS: The significant increase of outpatient botulinum toxin injections shows the successful control effect through adapted remuneration options. A shift to the inpatient sector was observed for prostate biopsies. This may be due to higher hygienic standards and technical requirements for MRI fusion.

Clinically latent and autopsy-verified inflammatory disorders and malignant tumours in transplant patients.

AIMS: The number of clinical autopsies decreases while the rate of missed relevant diagnoses is known to be 2%-20%. In this study, we focused on postmortem examinations of patients after transplantation of solid organs. METHODS: A total of 122 cases were assessed for this study. Transplant organs included liver (LiTx; n=42/122, 34%), heart (n=8/122, 7%), lungs (n=32/122, 26%), kidney (KTx; n=38/122, 31%) and KTx+LiTx (n=2/122, 2%). RESULTS: The most frequent autopsy-verified causes of death were cardiac or respiratory failure (together n=85/122, 70%). The frequency of malignant tumours that were identified at autopsy was 5% (n=6/122). In 3% (n=4/122) of cases, Goldman class I discrepancies between clinical diagnosis and autopsy findings were identified. CONCLUSIONS: The rate of missed relevant diagnoses might be relatively low, but these cases nevertheless refute the contention that modern diagnostic techniques negate the need for autopsies in patients who died after transplantation.

Comprehensive analysis of complications after transperineal prostate biopsy without antibiotic prophylaxis: results of a multicenter trial with 30 days' follow-up.

BACKGROUND: To investigate infectious and non-infectious complications after transperineal prostate biopsy (TPB) without antibiotic prophylaxis in a multicenter cohort. Secondly, to identify whether increasing the number of cores was predictive for the occurrence of complications. Thirdly, to examine the relation between TPB and erectile dysfunction. METHODS: We analyzed a retrospective multicenter cohort of 550 patients from three different urological centers undergoing TPB without antibiotic prophylaxis. The median number of cores was 26. Demographic and clinical data were extracted by reviewing patients' electronic medical records and follow-up data such as postoperative complications obtained by structured phone interviews. To investigate the influence of the number of cores taken on the occurrence of complications, we performed univariate and multivariate mixed effects logistic regression models. RESULTS: There was no case of sepsis reported. Overall, 6.0% of patients (33/550) presented with any complication besides mild macrohematuria. In all, 46/47 (98%) complications were ≤Grade 2 according to Clavien-Dindo. In multivariate regression analyses, an increased number of cores was associated with overall complications (odds ratio (OR) 1.08, 95% confidence interval (CI) 1.02-1.14, P = 0.01) and specifically bleeding complications (OR 1.28, 95% CI 1.11-1.50, P = 0.01) but not with infectious complications (OR 1.03, 95% CI 0.97-1.10, P = 0.67). A total of 14.4% of patients referred impairment of erectile function after TPB. Of note, 98% of these men were diagnosed with prostate cancer. CONCLUSIONS: This is the first multicenter trial to investigate complications after TPB without antibiotic prophylaxis. In our study, we found no case of sepsis. This underlines the safety advantage of TPB even without antibiotic prophylaxis and supports the ongoing initiative to abandon TRB of the prostate. A higher number of cores were associated with an increase in overall complications specifically bleeding complications, but not with infectious complications. Post-biopsy erectile dysfunction was mainly present in patients diagnosed with PCa.

Manual kidney stone size measurements in computed tomography are most accurate using multiplanar image reformatations and bone window settings.

Computed tomography in suspected urolithiasis provides information about the presence, location and size of stones. Particularly stone size is a key parameter in treatment decision; however, data on impact of reformatation and measurement strategies is sparse. This study aimed to investigate the influence of different image reformatations, slice thicknesses and window settings on stone size measurements. Reference stone sizes of 47 kidney stones representative for clinically encountered compositions were measured manually using a digital caliper (Man-M). Afterwards stones were placed in a 3D-printed, semi-anthropomorphic phantom, and scanned using a low dose protocol (CTDIvol 2 mGy). Images were reconstructed using hybrid-iterative and model-based iterative reconstruction algorithms (HIR, MBIR) with different slice thicknesses. Two independent readers measured largest stone diameter on axial (2 mm and 5 mm) and multiplanar reformatations (based upon 0.67 mm reconstructions) using different window settings (soft-tissue and bone). Statistics were conducted using ANOVA ± correction for multiple comparisons. Overall stone size in CT was underestimated compared to Man-M (8.8 ± 2.9 vs. 7.7 ± 2.7 mm, p < 0.05), yet closely correlated (r = 0.70). Reconstruction algorithm and slice thickness did not significantly impact measurements (p > 0.05), while image reformatations and window settings did (p < 0.05). CT measurements using multiplanar reformatation with a bone window setting showed closest agreement with Man-M (8.7 ± 3.1 vs. 8.8 ± 2.9 mm, p < 0.05, r = 0.83). Manual CT-based stone size measurements are most accurate using multiplanar image reformatation with a bone window setting, while measurements on axial planes with different slice thicknesses underestimate true stone size. Therefore, this procedure is recommended when impacting treatment decision.

[Current practice patterns of perioperative cystectomy management in Germany: a questionnaire survey]. / Sicher zwischen Leitlinie und Leitplanke: Umfrage zur Praxis des perioperativen Managements der radikalen Zystektomie in Deutschland.

OBJECTIVE: Radical cystectomy (RCX) is the standard treatment for muscle-invasive and treatment-refractory non-invasive bladder cancer, but that is associated with high morbidity. We now survey current practice patterns on perioperative management among German urological departments of all sizes METHODS: Members of the German Association of Urology and the German Society of Residents in Urology (GeSRU) were contacted by email and asked to answer a 24-item online questionnaire covering clinically relevant aspects of current guidelines and controversies. RESULTS: Responses were obtained from at least 19 % of all German urological centers. About 60 % performed preoperative staging using CT urography and chest CT. The most common perioperative antibiotic prophylaxis was a third generation cephalosporin combined with metronidazole (46 %), administered for a median of 5 days. Stentograms for ileal conduit and neobladder are routinely performed in 38 % and 55 % of patients, respectively. Ureteral stents were usually removed 11 - 12 days after the procedure (ileal conduit and neobladder). Based on the surrogate parameters of preoperative bowel preparation, postoperative start of oral nutrition and use of nasogastric tube, fast-track concepts such as ERAS were not generally established (< 50 %). Robot-assisted cystectomy appears to be performed in 15 % of German urological centers and was associated with the number of performed cystectomies (p < 0.001). CONCLUSIONS: Most aspects of perioperative management in cystectomy patients - staging diagnostics, use of antibiotics, stent removal - are performed in accordance with current guidelines. Other clinical questions such as stent imaging before removal and fast track concepts are handled heterogeneously. Guideline-adherence was not associated with hospital size or number of procedures performed.

Radiation exposure during retrograde intrarenal surgery (RIRS): a prospective multicenter evaluation.

PURPOSE: Retrograde intrarenal surgery (RIRS) may require extensive X-ray usage. We evaluated the impact of preoperative surgeon briefing regarding the inclusion and evaluation of fluoroscopy time (FT) and dose area product (DAP) in a multicenter study on the applied X-ray usage. METHODS: A prospective multicenter study of 6 tertiary centers was performed. Each center recruited up to 25 prospective patients with renal stones of any size for RIRS. Prior to study´s onset, all surgeons were briefed about hazards of radiation and on strategies to avoid high doses in RIRS. Prospective procedures were compared to past procedures, as baseline data. FT was defined as the primary outcome. Secondary parameters were stone-free rate (SFR), complications according to the Clavien, SATAVA and postureteroscopic lesion scale. Results were analyzed using T test, chi-squared test, univariate analysis and confirmed in a multivariate regression model. RESULTS: 303 patients were included (145 retro- and 158 prospective). Mean FT and DAP were reduced from 130.8 s/565.8 to 77.4 s/357.8 (p < 0.05). SFR was improved from 85.5% to 93% (p < 0.05). Complications did not vary significantly. Neither stone position (p = 0.569), prestenting (p = 0.419), nor surgeons' experience (> 100 RIRS) had a significant impact on FT. Significant univariate parameters were confirmed in a multivariate model, revealing X-ray training to be radiation protective (OR - 44, p = 0.001). CONCLUSIONS: Increased surgeon awareness of X-ray exposure risks has a significant impact on FT and DAP. This "awareness effect" is a simple method to reduce radiation exposure for the patient and OR staff without the procedures´ outcome and safety being affected.

Size and volume of kidney stones in computed tomography: Influence of acquisition techniques and image reconstruction parameters.

PURPOSE: Computed tomography (CT) is routinely used to assess suspected urolithiasis. Information obtained from CT include presence, location and size of stones, with the latter frequently determining treatment strategy. While there is consensus regarding measurements procedures of kidney stones, influence of radiation dose and reconstruction techniques on stone measurements are unknown. The purpose of this study was to systematically evaluate the influence of these technical determinants on kidney stone size measurements. METHOD: 47 kidney stones of different composition were scanned using a 64-row-multi-detector CT in a 3D-printed, semi-anthropomorphic phantom. Reference stone sizes were measured manually with a digital caliper (Man-M). Stones were imaged with 2 and 10 mGy CTDI. Images were reconstructed using filtered-back-projection, hybrid-iterative and model-based-iterative reconstruction algorithms (FBP, HIR, MBIR) in combination with different kernels and denoising levels. All stones underwent semi-automatic, threshold-based segmentation for computation of maximum diameter and volume. Statistics were conducted using ANOVA ±â€¯correction for multiple comparisons. RESULTS: Overall stone size as compared to manual measurements was overestimated in CT (10.0 ±â€¯3.1 vs. 8.8 ±â€¯2.9 mm, p < 0.05) yet showing a good correlation (R2 = 0.66). Radiation dose and denoising levels did not significantly influence measurements (p > 0.05). MBIR and sharp kernels showed closest agreement with Man-M (9.3 ±â€¯3.1 vs. 8.8 ±â€¯2.9 mm, p < 0.05). Differences within single stones were as high as 40 % (e.g. Man-M: 5.9 mm, CT: 7.3-12.0 mm). CONCLUSIONS: CT-based measurements of kidney stone size appear unaffected by radiation dose and denoising technique, whereas reconstruction algorithms and kernels demonstrate a relevant impact on size measurements. Smallest differences were found using MBIR with a sharp kernel.

Dose independent characterization of renal stones by means of dual energy computed tomography and machine learning: an ex-vivo study.

OBJECTIVES: To predict the main component of pure and mixed kidney stones using dual-energy computed tomography and machine learning. METHODS: 200 kidney stones with a known composition as determined by infrared spectroscopy were examined using a non-anthropomorphic phantom on a spectral detector computed tomography scanner. Stones were of either pure (monocrystalline, n = 116) or compound (dicrystalline, n = 84) composition. Image acquisition was repeated twice using both, normal and low-dose protocols, respectively (ND/LD). Conventional images and low and high keV virtual monoenergetic images were reconstructed. Stones were semi-automatically segmented. A shallow neural network was trained using data from ND1 acquisition split into training (70%), testing (15%) and validation-datasets (15%). Performance for ND2 and both LD acquisitions was tested. Accuracy on a per-voxel and a per-stone basis was calculated. RESULTS: Main components were: Whewellite (n = 80), weddellite (n = 21), Ca-phosphate (n = 39), cysteine (n = 20), struvite (n = 13), uric acid (n = 18) and xanthine stones (n = 9). Stone size ranged from 3 to 18 mm. Overall accuracy for predicting the main component on a per-voxel basis attained by ND testing dataset was 91.1%. On independently tested acquisitions, accuracy was 87.1-90.4%. CONCLUSIONS: Even in compound stones, the main component can be reliably determined using dual energy CT and machine learning, irrespective of dose protocol. KEY POINTS: • Spectral Detector Dual Energy CT and Machine Learning allow for an accurate prediction of stone composition. • Ex-vivo study demonstrates the dose independent assessment of pure and compound stones. • Lowest accuracy is reported for compound stones with struvite as main component.

Comprehensive analysis of Twitter activity on #Incontinence.

AIM: The aim of this study is comprehensive analysis of the Twitter activity on #Incontinence. MATERIAL AND METHODS: The following six functional-urology hashtags on Twitter were analyzed from 2015 to 2018 to gain a comprehensive insight into the topic: #Incontinence, #InterstitialCystitis, #OAB, #FPMRS, #BPH, and #UroBPH. For the Twitter analysis, Symplur Signals was used, which is a health care social media analytics tool. RESULTS: In total 191 383 tweets by 54 094 users in 2015 through 2018 were analyzed. A rise in the number of tweets could be identified for all six analyzed hashtags on functional urology, in summary, the numbers raised from 25 629 tweets in 2015 to 66 551 tweets in 2018. For the hashtag incontinence (#Incontinence), the number of tweets raised from 13 823 in 2015 to 19 996 in 2018 (+44.7%). Main influencers on functional urology topics identified by the Symplur algorithm were individuals from the health care sector in 44.6% of the cases and health care organizations in 36.5% of the cases, whereas for #Incontinence, only 7% of influencers were patients in 2018. The ten most common words connected to #Incontinence were Incontinence, Urinary, Women, Help, New, Bladder, Stress, Treatment, Pelvic, and Sex. Of the tweets, 66% were categorized as positive statements and 34% were categorized as negative. CONCLUSION: Social media is an emerging tool of communication in urology, whereas discussions on #Incontinence are underrepresented compared to the high prevalence of urinary incontinence. In addition, patients' activity is low.