Characterization of the histological response to the Butterfly Prostatic Retraction Device in patients with benign prostatic hyperplasia.

PURPOSE: The Butterfly Prostatic Retraction Device ("Butterfly") is a permanent nitinol implant for benign prostatic hyperplasia. This study examines the chronic response of prostate tissue to the Butterfly in histological specimens from patients in the Butterfly pilot clinical study. METHODS: Retrospective qualitative and semi-quantitative review of histological specimens of seven (7) patients who participated in the Butterfly pilot clinical study. Patients had at least 1-month implantation with the Butterfly prior to implant removal and TURP. Tissue samples were graded by two pathologists. RESULTS: Four out of six patients had IPSS decreased from baseline. All seven patients' samples had signs of chronic inflammation; one demonstrated acute inflammation and one demonstrated fibrosis. In three cases, intraglandular calcification was identified. There was no ischemic necrosis induced by the implant, and no encrustation, urethral edema, or cellular atypia was noted. CONCLUSION: The Butterfly demonstrated an overall favorable safety profile in terms of tissue response. This study demonstrates that there is no significant tissue reaction in the prostatic urethra due to presence of Butterfly device.

The Butterfly: A Novel Minimally Invasive Transurethral Retraction Device for Benign Hypertrophy of the Prostate.

INTRODUCTION: The Butterfly Prostatic Retraction device is a novel transurethral implant designed to dilate the prostatic urethra and treat lower urinary tract symptoms. We assessed its safety, efficacy and impact on urinary flow, ejaculation, and quality of life. MATERIALS AND METHODS: We included 64 men, treated for benign prostate hyperplasia for at least 1 year. All patients had Qmax≤ 13 mL/s and IPSS >12. Insertion of the device was performed via cystoscopy. Follow-up visits were performed at 2 weeks, 1, 3, 6, and 12 months and included uroflowmetry, IPSS, QoL, and sexual function questionnaires. Cystoscopy was performed on 3 and 12 months. RESULTS: Patients age was 50-83 years. 28 patients completed a 1-year follow-up with an intact device. Mean Qmax improved by 2 mL/s (25%), IPSS median drop was 10 points (40%), and QoL score was 1.5 points (38%). Sexually active patients reported antegrade ejaculation. On cystoscopy, gradual coverage of the devices with urethral mucosa was observed. In 1 patient, the device was repositioned. In 19 patients, the device was removed. 12 patients returned to alpha-blocker therapy and 7 patients underwent TURP. One patient developed a bulbar urethral stricture. CONCLUSIONS: We demonstrated feasibility and good tolerability of the Butterfly device.

Standardized single-stage laparoscopic Fowler-Stephens orchiopexy regardless of testis position: Modification of technique eliminates the need for intra-operative decision-making.

Background / Purpose: It is generally perceived that a primary laparoscopic orchiopexy has superior outcomes due to preservation of the testicular artery, and thus should be the choice when achievable. The two-stage laparoscopic Fowler-Stephens orchiopexy (LFSO) is considered superior regarding success rate compared to the one-stage procedure when the artery must be transected. Outcomes can be jeopardized when a primary orchiopexy is ultimately realized to be the incorrect procedure due to insufficient testicular artery length. It is preferable to decide the approach before initiating dissection, however, in reality, this does not always occur. A single uniform approach to all intraabdominal testes (IAT) that takes into consideration the main challenges encountered when performing laparoscopic orchiopexy can simplify the approach and potentially achieve good outcomes. We present our experience with a standardized approach for IAT regardless of testicular position and describe the surgical modification needed to achieve good results with the one-stage LFSO. Materials and Methods: Key surgical maneuvers implicated in the modified one-stage LFSO (M-LFSO) include preservation of a wide peritoneal flap between the vessels and the vas deferens, dissecting the vessels as proximal as possible and avoiding manipulation of the epididymis and vessels between the vas and epididymis when transferring the testis to the scrotum. Results: Our cohort included 55 boys (59 testes). Median age and weight at surgery were 13.3 months (interquartile range [IQR] 9.2-32.4) and 10.4 kg (IQR 9.2-12.6). The mean operative time was 70 min (IQR 60-85). The median follow-up was 11 months (IQR 7-12). There was one case of testicular atrophy (2%) and two cases of suboptimal testicular position in the scrotum at 6 months. Conclusions: M-LFSO is a standardized approach for all cases of IAT regardless of testicular position. Preservation of a wide peritoneal flap and proximal dissection of the vessels may contribute to the adequate testicular blood supply. The proposed approach eliminates the need for intra-operative decision-making and for ancillary procedures.

Bladder outlet obstruction is associated with bladder oversensitivity in women.

INTRODUCTION AND HYPOTHESIS: Bladder outlet obstruction (BOO) in women might be associated with significant lower urinary tract storage symptoms such as increased frequency, urgency, and incontinence. This prospective study was designed to assess whether there is an objective association between BOO and abnormal parameters during filling cystometry in women. METHODS: A total of 169 consecutive women (mean age 56 ± 14 years) who were referred for urodynamic investigation were prospectively recruited. Comprehensive medical, obstetric, and gynecological histories were recorded. All patients underwent physical examination, renal and bladder ultrasound, and filled out the International Prostate Symptoms Score (IPSS) questionnaire. The cohort was divided into obstructed and un-obstructed groups based on pressure flow results (Obstruction: Qmax <12 ml/s and Pdet @ Qmax >25 cmH2O). RESULT: There was no significant difference in the frequency of detrusor overactivity between the obstructed and non-obstructed group (37% vs 32%, p = 0.71). All bladder sensation volumes were significantly lower in obstructed women than non-obstructed women in univariate and multivariate logistic regression analyses. Of the sensation parameters, first desire to void (FDV) had the highest area under the curve (AUC = 0.75, 95% CI = 0.672-0.837, p < 0.001) for predicting BOO. FDV < 105 ml showed a strong association with BOO with OR = 9.84 (95% CI 4.122-23.508, p < 0.0001). On univariate and multivariate analyses adjusted to 50 cc reduction in sensation volume, all sensation parameters, were associated with bladder outlet obstruction. CONCLUSION: Our results suggest that there might be a strong association between bladder oversensitivity and BOO in women. This may shed light on the pathophysiological connection between obstruction and enhanced afferent signaling from the bladder.

Transvaginal surgical repair of large urethral diverticula with bipedicle double-opposing flaps of the periurethral fascia.

PURPOSE: The aims of this study were to describe a novel technique for transvaginal repair of large (> 4 cm) female urethral diverticulum (UD) using bipedicle double-opposing flaps of the periurethral fascia and to evaluate long-term follow-up. METHODS: The medical records of 29 women who underwent transvaginal excision of UD at our institution were reviewed retrospectively. Seventeen cases with UD > 4 cm were included in the study. Cystourethroscopy was performed at the beginning of the surgery, and in 60% of cases the orifice of the diverticulum was identified. An inverted-U incision was performed at the vaginal anterior wall. The periurethral fascia was incised longitudinal at the midline and parallel to the urethra. The diverticular sac was dissected and resected. The neck of the diverticulum was closed with 4/0 vicryl suture. The periurethral fascia was sutured using bipedicle double-opposing flaps with interrupted 3/0 vircyl suture. The vaginal mucosa was sutured with 2/0 vicryl continuous suture. RESULTS: All 17 women with large UD were operated on using bipedicle double-opposing flaps of the periurethral fascia. Follow-up of 5 ± 2.4 years yielded no recurrence and no other late complications. CONCLUSION: Using bipedicle double-opposing flaps of the periurethral fascia during transvaginal excision of large UD is safe and effective.

External Validation of Contact Surface Area as a Predictor of Postoperative Renal Function in Patients Undergoing Partial Nephrectomy.

PURPOSE: We sought to externally validate a mathematical formula for tumor contact surface area as a predictor of postoperative renal function in patients undergoing partial nephrectomy for renal cell carcinoma. MATERIALS AND METHODS: We queried a prospectively maintained kidney cancer database for patients who underwent partial nephrectomy between 2014 and 2016. Contact surface area was calculated using data obtained from preoperative cross-sectional imaging. The correlation between contact surface area and perioperative variables was examined. The correlation between postoperative renal functional outcomes, contact surface area and the R.E.N.A.L. (radius, exophytic/endophytic properties, nearness of tumor to collecting system or sinus, anterior/posterior, location relative to polar lines and tumor touches main renal artery or vein) nephrometry score was also assessed. RESULTS: A total of 257 patients who underwent partial nephrectomy had sufficient data to enter the study. Median contact surface area was 14.5 cm2 (IQR 6.2-36) and the median nephrometry score was 9 (IQR 7-10). Spearman correlation analysis showed that contact surface area correlated with estimated blood loss (rs = 0.42, p <0.001), length of stay (rs = 0.18, p = 0.005), and percent and absolute change in the estimated glomerular filtration rate (rs = -0.77 and -0.78, respectively, each p <0.001). On multivariable analysis contact surface area and nephrometry score were independent predictors of the absolute change in the estimated glomerular filtration rate (each p <0.001). ROC curve analysis revealed that contact surface area was a better predictor of a greater than 20% postoperative decline in the estimated glomerular filtration rate compared with the nephrometry score (AUC 0.94 vs 0.80). CONCLUSIONS: Contact surface area correlated with the change in postoperative renal function after partial nephrectomy. It can be used in conjunction with the nephrometry score to counsel patients about the risk of renal functional decline after partial nephrectomy.

Minimally Invasive Approach for Treatment of Seminal Vesicle Cyst Associated with Ipsilateral Renal Agenesis.

OBJECTIVES: We reviewed the clinical presentation and approach for the treatment of symptomatic seminal vesicle cyst associated with ipsilateral renal agenesis while presenting our experience with a series of 5 patients treated with minimally invasive surgery for Zinner syndrome. MATERIALS AND METHODS: Between the years 2008 and 2016, we operated on 5 patients who presented with symptomatic seminal vesicle cyst and ipsilateral renal agenesis. Patients' charts and medical records were reviewed and compared with past published minimally invasive series. RESULTS: Four patients were treated in a laparoscopic approach and one was treated with robotic-assisted seminal vesicle cyst excision. In all cases, the cystic complex was drained and excised with marsupialization of the remaining cyst walls to prevent cystic recurrence. The mean operating time was 3:47 h and mean hospitalization time was 7 days (4-14). The mean follow-up period was 3.2 years (range 1.7-4.8 years). All patients reported a resolution of symptoms during postoperative follow-up. CONCLUSIONS: Seminal vesicle cyst with ipsilateral renal agenesis should be suspected in young male patients presenting with pelvic cystic masses. Treatment is reserved for symptomatic patients and the preferred approach is minimally invasive surgery. This approach is feasible and effective while providing advantages both for the patient and the surgeon.

Provision of information leaflet before urodynamic study reduces the pre-examination anxiety level.

AIMS: To find out if information leaflets reduce anxiety levels before urodynamic studies (UDS). METHODS: One hundred and four patients (age 60 ± 15 years) who were referred for multichannel UDS were prospectively recruited and randomized into 2 groups: (1) received a leaflet containing detailed information regarding the examination; (2) did not receive a leaflet. Patients who were unable to complete the questionnaire due to mental disorders and patients who had previously undergone UDS were excluded. The leaflets were mailed to the patients in group 1 one month before the examination. This leaflet included information on how the examination would be performed, its purpose, recommended preparation, potential complications, and common events that might occur in association with the examination, such as incontinence. Emotional distress was measured by the State Anxiety Inventory (SAI)-a validated questionnaire composed of 20 items measuring anxiety. These measures are divided into two psychological domains: (1) positive well being; (2) psychological distress. Patients filled out the SAI immediately before entering the examination room. RESULTS: Demographics and clinical and psychological co-morbidities were similar between the groups. The "psychological distress" score was significantly lower in group 1 (13.1 ± 2.9 vs. 24.8 ± 5.8, P < 0.001), whereas there was no difference in the "positive well being" score. CONCLUSIONS: We recommend providing patients with an information leaflet on UDS since it significantly reduces anxiety levels. Neurourol. Urodynam. 35:805-808, 2016. © 2015 Wiley Periodicals, Inc.

Pain during Female Urethral Catheterization: Intraurethral Lubricant Injection versus Catheter Tip Lubrication--A Prospective Randomized Trial.

PURPOSE: Urethral lubrication during catheterization can be performed by instilling the gel directly in the urethra or by pouring the gel on the catheter tip. In this study we compared the pain level associated with each technique during female urethral catheterization in the setup of a multichannel urodynamic study. MATERIALS AND METHODS: A total of 94 women with a mean ± SD age of 55 ± 14 years who were referred for a multichannel urodynamic study were prospectively randomized into 2 groups according to lubrication technique, including 1) instillation of 5 ml 2% lidocaine gel in the urethra 5 minutes before catheterization or 2) lubrication of the distal part of the catheter with 5 ml 2% lidocaine gel. A visual analog pain scale of 0 to 10 was completed at different time points, including prior to gel instillation (baseline), during gel instillation (group 1), during catheterization, and 5 and 30 minutes after the procedure ended. RESULTS: The study groups did not differ in demographic, clinical or urodynamic parameters. The mean visual analog scale score during catheterization was 2.3 ± 1.4 and 2.4 ± 1.6 in groups 1 and 2, respectively (p = 0.71). There was no difference in the reported visual analog scale score at the other checkpoints. The mean recorded visual analog scale score during instillation of the lubricant in the urethra in group 1 was 1.9 ± 0.9. CONCLUSIONS: The actual act of lubricant instillation in the urethra during catheterization in women causes additional and unnecessary pain. Therefore, it is not recommended. Other than that there is no difference in the urethral pain level between the 2 lubrication techniques.

Liquid paraffin is superior to 2% lidocaine gel in reducing urethral pain during urodynamic study in men: A pilot study.

AIMS: To compare the pain perception between intraurethral instillation of 2% lidocaine gel and liquid paraffin during Urodynamic study in men. METHODS: A randomized, single-blind comparison trial was conducted. Forty men scheduled to undergo multichannel Urodynamic study were randomized to receive either 10 ml of 2% lidocaine gel (group 1, n = 20) or 10 ml of liquid paraffin (group 2, n = 20). Patients recorded their pain on a 0-10 visual analog scale prior to lubricant instillation, immediately after lubricant instillation, after the introduction of the Urodynamic catheter, 5 and 30 min after the catheter was taken out. RESULTS: pain scores were significantly higher in group 1 compared to group 2 immediately after the instillation of the lubricants (4.2 ± 1.5 vs. 2.6 ± 0.9, P < 0.001) and after catheterization (4.8 ± 1.5 vs. 3.5 ± 1.1, P < 0.01). There were no differences in the pain scores between the two groups in the other time points that were evaluated. CONCLUSIONS: Liquid paraffin is more efficient than 2% lidocaine gel in reducing urethral pain during Urodynamic study in men. Pain scores were specifically better during the instillation of the lubricant and during the delivery of the urethral catheter.

Self-induced plantar-flexion objectively reduces wave amplitude of detrusor overactivity and subjectively improve urinary urgency: a pilot study.

AIMS: To estimate the effect of plantar-flexion on the wave amplitude of involuntary detrusor contraction and the severity of urinary urgency during filling cystometry in patients with detrusor overactivity (DO). METHODS: Twenty-two consecutive patients with DO were enrolled. During urodynamics, the mean peak detrusor pressures of each contraction were documented and compared. At the beginning of the 2nd or 3rd wave, patients were asked to perform continuous plantar-flexion by pushing their tiptoes against the floor. Following each wave, patients were asked to grade the severity of the urgency by a visual analogue scale (VAS). RESULTS: The mean peak detrusor pressure without plantar-flexion was 58 cmH2 O (95% CI: 46.3-69.7) compared to 31 cmH2 O (95% CI: 23.1-38.9) with plantar-flexion (P < 0.001). All patients reported a reduced degree of urgency during plantar-flexion reflected in a significant reduction in mean VAS score from 9.3 (95% CI: 9-9.5) to 4.7 (95% CI: 3.9-5.4; P < 0.0001). CONCLUSIONS: Self-performed plantar-flexion maneuver might reduce the severity of urinary urgency and the magnitude of overactive detrusor contractions, which may have a role in the conservative therapy of detrusor overactivity.

Repositioning of Ureteropelvic Junction in Robot-assisted Laparoscopic Pyeloplasty.

OBJECTIVE: To describe the technique of ureteropelvic junction (UPJ) repositioning in robot-assisted dismembered pyeloplasty as a modified approach during which the UPJ is brought to a new location to facilitate the anastomosis. MATERIALS AND METHODS: Retrospective review of pediatric and adult cases of robot-assisted laparoscopic pyeloplasty performed between the years 2016 and 2022. In a select group of patients, repositioning of the UPJ was performed. Demographic data, surgical and post-surgical outcomes were compared to a group that underwent classical Anderson-Hynes (AH) dismembered pyeloplasty. RESULTS: Overall, 70 patients underwent robot-assisted laparoscopic dismembered pyeloplasty and were included in the study, with 15 in the repositioning group and 55 in the AH group. The median age of patients included was 26 months (interquartile range (IQR) 7-203). Median operative time was 140 minutes (IQR 129-192) and 170 minutes (IQR 135-207) for the repositioning and AH group, respectively. The indications for UPJ repositioning were high UPJ insertion (n = 8), crossing vessel (n = 5), and renal malformations (n = 2). Clinical significance was shown in the Society of Fetal Urology classification and split renal function postoperatively, respectively (P <.001; P <.01). Postoperatively, both groups showed improvement in anterior posterior diameter (APD) and diuretic T1/2 (P = 0.48). There was 1 case of surgical failure requiring revisional surgery in the repositioning group (6.6%) and 3 in the AH group (5.5%) (P >.05). Overall, there were 3 cases of Clavien-Dindo Grade 3 complications, all in the AH group (2 cases of urine leak from anastomosis, 1 case of port side hernia). CONCLUSION: Repositioning of the UPJ is optional in cases when the obstructed UPJ is in a suboptimal anatomical position.

Robotic-Assisted Laparoscopic Pyeloplasty in Challenging Cases of Ureteropelvic Junction Obstruction in the Pediatric Population: A Multicenter Review.

Purpose: To report a multi-institutional international experience in performing robotic pyeloplasty for complicated cases of ureteropelvic junction obstruction (UPJO) in the pediatric population and assess feasibility and outcomes. Materials and Methods: Retrospective chart review of all pediatric patients who underwent robotic-assisted laparoscopic pyeloplasty (RALP) for UPJO in challenging cases between 2013 and 2021 was included. Demographics, perioperative surgical data, complications, and results are described. Challenging cases were defined as bilateral UPJO, failure of previous open pyeloplasty (thus re-do cases), correction of UPJO in kidneys with anatomical variations, huge hydronephrosis, and low-weight infants (<6 kg). Results: Over an 8-year period, 36 children (62% males and 38% females) met the inclusion criteria for our study. Fifteen patients underwent RALP for recurrent UPJO; among them, 2 children required simultaneous surgery for renal stones, 3 cases of lower pole UPJO in double collecting system, 3 cases of pelvic and horseshoe kidneys, 10 cases of infants weighing <6 kg, 3 cases of huge hydronephrosis, and 2 cases of bilateral UPJO. The median age and weight were 36 months (interquartile range [IQR] 14-84) and 12 kg (IQR 10-20.5), respectively. All robotic cases were completed successfully with no conversion to an open procedure. The median operative time was 120 minutes (IQR 90-135). The mean length of hospital stay was 2.6 days. Four patients (17%) had postoperative complications-1 ileus (Clavien-Dindo grade [CDG] I) and 3 urinary tract infections (CDG II). No CDG III or higher complication was encountered. At a median follow-up of 36 months, the success rate was 95% with 1 patient requiring another re-do procedure due to recurrent obstruction. Conclusions: Our data suggest that RALP is safe and effective even for challenging cases of UPJO in children.

Use of Validated Questionnaires to Predict Cosmetic Outcomes of Hypospadias Repair.

INTRODUCTION: Hypospadias is a syndrome of penile maldevelopment. The primary goal of hypospadias surgery is to create a penis with normal appearance and function. Historically, the outcome of hypospadias repair has been assessed based on the need for reoperation due to urethroplasty complications (UC), including fistula formation, dehiscence, meatal stenosis, or development of a urethral stricture. The Glans-Urethral Meatus-Shaft (GMS) score is a standardized tool to predict UC. Analysis of the cosmetic outcomes of hypospadias repair based on the appearance of the reconstructed penis has been validated, and standardized scores have been published. The Hypospadias Objective Penile Evaluation (HOPE) score is a validated questionnaire used to assess postoperative cosmetic outcomes. Although predictors of surgical outcomes and UC have been well documented, predictors of optimal cosmetic outcomes are lacking in the literature. Furthermore, reoperation due to cosmetic considerations has been poorly reported. OBJECTIVE: To identify predictors of cosmetic outcomes after hypospadias repair and to assess the reoperation rate according to cosmetic considerations. MATERIALS AND METHODS: This prospective cohort study included 126 boys who underwent primary hypospadias repair. The severity of hypospadias, degree of penile curvature, glans width, preoperative HOPE, and GMS scores were documented. The standard technique for single-stage repairs, the tubularized incised plate urethroplasty, was performed. The primary endpoint was cosmetic outcomes evaluated by the HOPE score questionnaire six months postoperatively. Optimal cosmetic results were defined by HOPE scores ≥ 57. RESULTS: The study population consisted of the following cases: 87 (69%) subcoronal, 32 (25%) shaft, and 7 (6%) proximal hypospadias. Among the study participants, 102 boys (81%) had optimal cosmetic results (HOPE ≥ 57), and 24 boys (19%) had surgeries with suboptimal cosmetic outcomes (HOPE < 57). Ancillary procedures were performed in 21 boys (16%), of which 14 (11%) were solely for cosmetic considerations, and 7 were secondary to UC. Using the Receiver Operating Characteristic analysis of potential predictors of optimal cosmetic outcomes, the preoperative HOPE score had the highest area under the curve (AUC = 0.79; 95% CI 0.69-0.89, p < 0.001). After multivariable analysis, the degree of penile chordee (p = 0.013), glans width (p = 0.003), GMS score (p = 0.007), and preoperative HOPE score (p = 0.002) were significant predictors of cosmetic outcomes. Although meatal location predicted suboptimal cosmetic results in univariate analysis, it was not a factor in multivariable analysis. CONCLUSIONS: Over 80% of boys undergoing hypospadias repair achieved optimal cosmetic outcomes. More than 10% of cases underwent ancillary procedures, secondary solely to cosmetic considerations. Predictors of optimal cosmetic outcomes after hypospadias surgery included degree of chordee, glans width, and preoperative HOPE and GMS scores, which were the best predictors of satisfactory cosmetic results. Although meatal location is the main predictor of UC, it was not a predictor for cosmetic outcomes. Factors affecting cosmetic outcomes should be clearly explained to parents during the preoperative consultation.

Our experience with management of congenital urological pathologies in adulthood: What pediatric urologists should know and adult urologists adopt in pediatric practice experience.

Purpose: To summarize our experience in the management of congenital anomalies in the kidney and urinary tract (CAKUT) in adults. Materials and methods: We conducted a retrospective chart review of all adult patients who underwent primary surgical intervention for CAKUT between 1998 and 2021. Results: The study included 102 patients with a median age of 25 (interquartile range, 23-36.5). Of these, 85 (83.3%) patients reported normal prenatal ultrasound, and the remaining 17 (16.7%) patients were diagnosed with antenatal hydronephrosis. These patients were followed-up conservatively postnatally and were discharged from follow-up because of the absence of indications for surgical intervention or because they decided to leave medical care. All studied adult patients presented with the following pathologies: 67 ureteropelvic junction obstructions, 14 ectopic ureters, 9 ureteroceles, and 6 primary obstructive megaureters, and the remaining 6 patients were diagnosed with vesicoureteral reflux. Forty-three percent of the patients had poorly functioning moieties associated with ectopic ureters or ureteroceles. Notably, 67% of patients underwent pyeloplasty, 9% underwent endoscopic puncture of ureterocele, 3% underwent ureteral reimplantation, 6% underwent endoscopic correction of reflux, 7% underwent partial nephrectomy of non-functioning moiety, and the remaining 9% underwent robotic-assisted laparoscopic ureteroureterostomy. The median follow-up period after surgery was 33 months (interquartile range, 12-54). Post-operative complications occurred in 5 patients (Clavien-Dindo 1-2). Conclusions: Patients with CAKUT present clinical symptoms later in life. Parents of patients diagnosed during fetal screening and treated conservatively should be aware of this possibility, and children should be appropriately counseled when they enter adolescence. Similar surgical skills and operative techniques used in the pediatric population may be applied to adults.

Laparoscopic and Robot-assisted Laparoscopic Reimplantation for Lower Ureter Pathology. A Multi-institutional Comparative Study in 1343 Patients.

OBJECTIVE: To evaluate the outcomes of children with vesicoureteral reflux (VUR) and obstructive megaureter (OM) utilizing various laparoscopic and robot-assisted approaches. MATERIALS AND METHODS: Retrospective review of all pediatric laparoscopic and robot-assisted cases for lower ureter pathology was performed between 2016-2022 in 13 academic centers worldwide. Five surgical approaches were assessed: LEUR, LVCUR, LDECUR, RALUR, and RADECUR. RESULTS: One thousand three hundred forty-three patients (490 boys and 853 girls) with a median age of 30 months (IQR 12-63) were treated at 13 centers. Nine hundred and eight patients (68%) underwent reimplantation due to VUR (unilateral in 818 and bilateral in 90 patients). Four hundred thirty-five (32%) had a surgery due to ureterovesical junction (UVJ) obstruction. Mean length of follow-up was 14 months (IQR 8-33). Median operative time was 202 minutes (IQR 142-220) in the robotic arm compared to 240 minutes (IQR 160-267) in the laparoscopic (P = .45). Intracorporeal excisional tapering was performed in 118 (8%) of the patients. Six patients in the OM group required additional surgery due to progressive obstruction. In the VUR group, 84% underwent voiding cystourethrography postoperatively. 5.6% showed residual reflux. Grade 1-2 Clavien-Dindo complications occurred in 10 patients (0.7%) and 6 (0.4%) in the laparoscopic and robotic arm, respectively. Grade 3 complications occurred in 17 (1.2%) and 8 (0.5%) in both arms, respectively. Surgical success was achieved in 96% of patients. CONCLUSION: Laparoscopic and robot-assisted laparoscopic approaches are simple, safe, and effective for treating all grades of VUR and OM. Robot-assisted approach is beneficial in terms of operative time, intracorporeal suturing, and lower complications rate.

Comparison of lower urinary tract symptoms between women with detrusor overactivity and impaired contractility, and detrusor overactivity and preserved contractility.

PURPOSE: We compared symptoms in women with detrusor overactivity with impaired contractility and women with detrusor overactivity who had preserved contractility. MATERIALS AND METHODS: The study included 359 consecutive women with detrusor overactivity who underwent multichannel urodynamics at our department between 2009 and 2011. The women were divided into 2 groups, including 151 (42%) with detrusor overactivity and impaired contractility, and 208 (58%) with detrusor overactivity and preserved contractility. We compared the 2 groups. RESULTS: Women with detrusor overactivity and impaired contractility were older (mean ± SD age 73.2 ± 17.3 vs 54.1 ± 20.7 years) with a higher frequency of diabetes mellitus (49% vs 31%, each p <0.001). The prevalence of previous urinary retention and recurrent cystitis was significantly higher in women with impaired contractility (7% vs 1%, p <0.01 and 22% vs 7%, p <0.001, respectively). Mean post-void residual urine was greater in the group with impaired contractility (89 ± 42 vs 21 ± 18 ml) and the mean maximal flow rate was lower (11 ± 6 vs 23 ± 5 ml per second, each p <0.001). The frequency of storage symptoms was similar in the 2 groups. However, voiding symptoms were more common in women with impaired contractility, including a slow stream in 69% vs 42%, an intermittent stream in 72% vs 26%, hesitancy in 35% vs 22%, straining in 84% vs 26%, terminal dribbling in 73% vs 42% and incomplete emptying in 71% vs 49% (p <0.001). CONCLUSIONS: Women with detrusor overactivity and impaired contractility are older than women with detrusor overactivity and preserved detrusor contractility. Urinary retention and recurrent cystitis are more frequent in women with detrusor overactivity and impaired contractility, and voiding symptoms are significantly more common.

Hyperbaric oxygen therapy for hemorrhagic radiation cystitis.

BACKGROUND: Hemorrhagic radiation cystitis (HRC) is a significant clinical problem that occurs after pelvic radiation therapy and is often refractory. OBJECTIVES: To evaluate the efficacy and safety of hyperbaric oxygen therapy (HBO) for HRC. METHODS: Daily 90 minute sessions of HBO at 2 ATM 100% oxygen were given to 32 HRC patients with ASTRO grades 3-4 hematuria. RESULTS: The median age was 72.5 (48-88 years). The median time interval between radiation therapy and HBO was 4 years (1-26 years). The patients received a median of 30 HBO sessions (3-53). Hematuria resolved in 27 patients (84%) and persisted in 5. Cystectomy was required in two, and ileal-conduit and bilateral percutaneous nephrostomies were performed in one and two patients, respectively. With a median follow-up of 12 months (5-74 months), the hematuria cleared completely in 16 patients (59%) and mild hematuria requiring no further treatment recurred in 10 others. Another patient with ASTRO grade 4 hematuria needed bladder irrigation and blood transfusions. Complications included eardrum perforation in four patients and transient vertigo and mild hemoptysis in one case each. None of them required HBO discontinuation. CONCLUSIONS: HBO controlled bleeding in 84% of the patients. A durable freedom from significant hematuria was achieved in 96% of the patients. HBO seems to be an effective and safe modality in patients with HRC.

The effect of ureteropelvic junction obstruction and pyeloplasty on somatic growth during infancy.

Background: Evidence regarding the impact of perinatal ureteropelvic junction obstruction (UPJO) and surgical correction during infancy, on somatic growth are scarce. Understanding these impacts could help advise parents and aid in treatment decision making. Objectives: To assess the impact of unilateral UPJO and surgical correction on somatic growth in infants diagnosed antenatally and treated during infancy. Design: A retrospective bi-institutional analysis of somatic growth in patients under 2 years who underwent dismembered pyeloplasty for the treatment of UPJO was conducted. Methods: We evaluated patients who were diagnosed with unilateral hydronephrosis during pre-natal ultrasound screening for detection of fetal anomalies between May 2015 and October 2020. The height and weight of patients who were diagnosed with UPJO were recorded at the age of 1 month, time of surgery, and 6 months after surgery. Standard deviation scores (SDSs) for height and weight were calculated and compared. Results: Forty-eight patients under the age of 2 years were included in the analysis. Median age and weight at pyeloplasty were 6.9 months and 7.5 kg. At 1 month, the median SDS for weight in the entire cohort was -0.30 [interquartile range (IQR): -1.0 to 0.63] and the median SDS for height was -0.26 (IQR: -1.08 to 0.52). In 22.9% of patients (11/48), weight and height were below -1 age-appropriate standard deviations, and 6.3% (3/48) were below -2 standard deviations, suggesting growth restriction. When comparing SDS for the entire cohort, there was no significant difference corelated to measurement time or effect of surgery. In the growth restricted cohort, we found a significant improvement in linear growth for height, which was demonstrated between birth and surgery as well as after surgery. Conclusion: Infants with unilateral UPJO diagnosed antenatally as a single anomaly may be at an increased risk of somatic growth restriction in comparison with the general population. In children with growth restriction at time of birth, height seems to improve regardless of surgical treatment. Pyeloplasty during infancy does not seem to negatively affect somatic growth. These findings can be used to counsel parents regarding the potential effects of UPJO and pyeloplasty.

Ureteral Stent Colonization and Urinary Tract Infection in Children Undergoing Minimally Invasive Pyeloplasty.

INTRODUCTION: Minimally invasive pyeloplasty (MIP), namely, laparoscopic and robot-assisted interventions, has gained popularity in recent years. Double-J ureteral stents are frequently inserted during surgery. Foreign bodies in the urinary tract are considered as risk factor for developing urinary tract infection (UTI). This study aimed to specify the bacteria cultured from urine and stents responsible for UTI in children with indwelling ureteral stents undergoing MIP. PATIENTS AND METHODS: We retrospectively reviewed medical records of 30 children (22 boys and 8 girls) who had undergone MIP between 2014 and 2017. Median age at surgery was 2.7 years (interquartile range [IQR]: 0.5-7.9). Urine cultures were obtained before surgery, before stent removal, 1 month after stent removal, and if UTI was suspected. Stents were removed 4 to 8 weeks after surgery and cultured. Patients' demographics, types of stents, and surgical details were recorded. RESULTS: Median stent indwelling time was 5.09 weeks (IQR: 4-6). Postoperative febrile UTI developed in 4/30 (13%) patients. Afebrile UTI occurred in another 4/30 (13%) patients. Stent cultures were positive in 19/30 (63%) patients. Stent and urinary cultures were identical in only one patient. Three of four patients with preoperative asymptomatic bacteriuria developed postoperative UTI. There was no association between UTI, gender, stent diameter, and duration of indwelling catheter. CONCLUSION: After MIP, febrile UTI and afebrile UTI occurred in about one quarter of patients. Pathogens isolated postsurgically from urinary cultures were unrelated to those colonizing the stents. Therefore, routine stent culturing is of low clinical significance. Moreover, small-caliber stents and longer indwelling periods were not risk factors for UTI. Optimizing antibiotic treatment for children with preoperative UTI may potentially prevent morbidity after surgery.