Publications by authors named "Sarah Neu"

5 Publications

  • Page 1 of 1

Diagnosis and Management of Kock Afferent Nipple Valve Obstruction.

Urology 2021 Feb 27. Epub 2021 Feb 27.

Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada. Electronic address:

Objective: To characterize afferent nipple valve obstruction in Kock diversions presenting with hydronephrosis and discuss appropriate work-up and management.

Methods: We retrospectively reviewed 7 cases of afferent nipple valve obstruction.

Results: The median time from diversion creation to afferent nipple valve intervention was 17-years. Presentations included febrile-UTIs, worsening renal function and hydronephrosis. All patients underwent upper tract imaging confirming bilateral hydronephrosis or hydronephrosis of a solitary kidney followed by nephrostomy tube insertion to drain the obstructed kidney(s). On nephrostogram assessment afferent nipple valve obstruction was confirmed by a lack of contrast passing through the valve. In 4 of these patients the afferent valve could not be cannulated while in one patient endoscopic retrograde balloon dilation was performed but failed after 12-months. One patient had successful antegrade balloon dilation (four-years follow-up). In five patients and the one patient who failed retrograde balloon dilation open surgical repair of the afferent nipple valve was successful (median follow-up time 5-years).

Conclusion: It is essential to consider afferent nipple valve obstruction in a patient with a Kock diversion presenting with bilateral hydronephrosis/hydronephrosis of a solitary kidney, even after many years following the original diversion. Appropriate work-up consists of upper tract imaging, endoscopy and retrograde studies or nephrostomy insertion with nephrostogram. Management options include endoscopic retrograde or antegrade balloon dilation or valve incision. Failing that, surgical repair may be successful with long-term upper tract preservation.
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February 2021

Urinary retention after AdVance™ Sling: A multi-institutional retrospective study.

Neurourol Urodyn 2021 01 21;40(1):515-521. Epub 2020 Dec 21.

Department of Urology, Medical University of South Carolina, Charleston, South Carolina, USA.

Aims: To identify risk factors for urinary retention following AdVance™ Sling placement using preoperative urodynamic studies to evaluate bladder contractility.

Methods: A multi-institutional retrospective review of patients who underwent an AdVance Sling for post-prostatectomy stress urinary incontinence from 2007 to 2019 was performed. Acute urinary retention (AUR) was defined as the complete inability to void or elevated post-void residual (PVR) leading to catheter placement or the initiation of intermittent catheterization at the first void trial postoperatively. Bladder contractility was evaluated based on preoperative urodynamics.

Results: Of the 391 patients in this study, 55 (14.1%) experienced AUR, and 6 patients (1.5%) had chronic urinary retention with a median follow-up of 18.1 months. In total, 303 patients (77.5%) underwent preoperative urodynamics, and there was no significant difference between average PdetQmax (26.4 vs. 27.4 cmH O), Qmax (16.6 vs. 16.2 ml/s), PVR (19.9 vs. 28.1 ml), bladder contractility index (108 vs. 103) for patients with or without AUR following AdVance Sling. Impaired bladder contractility preoperatively was not predictive of AUR. Time to postoperative urethral catheter removal was predictive of AUR (odds ratio, 0.83; 95% confidence interval, 0.73-0.94; p = .003).

Conclusions: Chronic urinary retention after AdVance Sling placement is uncommon and acute retention is generally self-limiting. No demographic or urodynamic factors were predictive of AUR. Patients who developed AUR were more likely to have their void trials within 2 days following AdVance Sling placement versus longer initial catheterization periods, suggesting that a longer duration of postoperative catheterization may reduce the occurrence of AUR.
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January 2021

Urethrovaginal fistula repair with or without concurrent fascial sling placement: A retrospective review.

Can Urol Assoc J 2020 Oct 27. Epub 2020 Oct 27.

Division of Urology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada.

Introduction: We sought to review outcomes of urethrovaginal fistula (UVF) repair, with or without concurrent fascial sling placement.

Methods: All patients diagnosed with UVF at our center from 1988-2017 were included in this study. Patient charts were reviewed from a prospectively kept fistula database, and patient characteristics and surgical outcomes were described. Descriptive statistics were applied to compare complication rates between patients with or without fascial sling placement at the time of UVF repair.

Results: A total of 41 cases of UVF were identified, all of which underwent surgical repair. Median age at diagnosis was 49 years (interquartile range [IQR] 35-62). All patients had undergone pelvic surgery. UVF etiology was secondary to stress urinary incontinence (SUI) surgery in 17 patients (41%) and urethral diverticulum repair in seven patients (17%). The most common presenting symptom was continuous incontinence in 19 patients (46%). Nineteen patients had a fascial sling placed at the time of surgery (46%), with no significant difference in complication rates (26% vs. 23%, p=0.79). Two patients had Clavien-Dindo grade I complications (5%) and one had a grade III complication (2%). Four patients had long-term complications (10%), including urinary retention, chronic pain, and urethral stricture. Two patients had UVF recurrence (5%). Median followup after surgery was 21 months (IQR 4-72).

Conclusions: UVF should be suspected in patients with continuous incontinence following a surgical procedure. Most UVF surgical repairs are successful and can be done with concurrent placement of a fascial sling.
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October 2020

Patients' perspective of telephone visits during the COVID-19 pandemic.

Can Urol Assoc J 2020 Sep;14(9):E402-E406

Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada.

Introduction: With the cessation of non-urgent clinical office visits due to the coronavirus, there has been a rapid shift to telephone and other virtual visits in outpatient practice. We conducted a survey to evaluate patients' perspective of telephone visits during the COVID-19 pandemic.

Methods: Patients receiving a scheduled telephone call as a virtual visit from urologists at our clinic were asked to participate in a three-minute, self-administered, online questionnaire. After verbal permission was obtained, the survey was emailed to each participant. The outcomes evaluated were telephone visit satisfaction and preference for type of appointment. Non-parametric tests were used to analyze the results. The study was approved by the Sunnybrook Research Ethics Board.

Results: A total of 102 participants were included; 96% of participants assessed the telephone visit as a positive experience in every survey question, while 45% expressed no preference. In those who expressed a preference, this was evenly divided between in-office visits and phone visits (p=0.0614). Participants who lived more than 75 km from the hospital were less likely to prefer an in-office visit compared to those residing locally (U=433, p=0.006; odds ratio 0.29, 95% confidence interval 0.106-0.779, p=0.0142).

Conclusions: In this survey, most participants assessed the telephone visit positively. Almost half had no preference and a similar proportion expressed a preference for in-office and telephone visits. Patients who resided farther from the hospital were more likely to prefer the telephone visit. This is the first study that we know of to assess patients' preferences regarding remote encounters in urology.
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September 2020

Triamcinolone acetonide injections for the treatment of recalcitrant post-radical prostatectomy vesicourethral anastomotic stenosis: A retrospective look at efficacy and safety.

Can Urol Assoc J 2021 Mar;15(3):E175-E179

Division of Urology, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada.

Introduction: We aimed to evaluate the success of bladder neck injections of triamcinolone at the time of transurethral bladder neck incision (BNI) for prevention of recurrent vesicourethral anastomotic stenosis (VUAS) following prostate cancer treatment.

Methods: This is a retrospective cohort study examining patients with recurrent VUAS post-radical prostatectomy (RP) ± radiation treated with triamcinolone injections at the time of BNI. VUAS was diagnosed by symptoms followed by cystoscopy or urethrography. The outpatient procedures were done under general anesthesia. Cold knife incisions were made at the three, nine, and 12 o'clock BN positions, followed by triamcinolone injections (4 mg/mL) into the three and nine o'clock incision sites. Treatment outcomes were determined with cystoscopy.

Results: Eighteen men underwent 25 procedures over a four-year period. Median age at diagnosis of VUAS was 65 (interquartile range [IQR] 61-68); median time to VUAS from RP was eight months (IQR 5-12). Fourteen patients (78%) had radiation treatment. The cohort had 128 unsuccessful VUAS treatments, with a median of five failed treatments per patient (IQR 3-10). Failed treatments included BN dilation, BNI, BN injection of mitomycin C, and urethral stent placement. Success rate after a mean of 16.3 months (standard deviation [SD] 8.1) from the time of triamcinolone injection was 83% (15/18). Six patients went on to have successful incontinence surgery. Five patients (28%) had treatment complications (bleeding, urinary tract infection, pain, and urinary extravasation). The three non-responders are stable and awaiting re-treatment with triamcinolone injection.

Conclusions: Triamcinolone bladder neck injections for post-RP VUAS are a useful and safe treatment for recurrent stenosis.
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March 2021