Occupational Radiation Exposure During Pregnancy: A Survey of Urologists on Perception, Experience, and Practice Patterns.

Introduction: The field of urology is predominantly male; however, there has been an increasing number of women in the workforce. Peak reproductive years frequently overlap with residency training and early attending career timelines. Exposure to ionizing radiation is a common occupational hazard in many procedural specialties. The use of radiation, for example, in interventional cardiology and interventional radiology, has shown little adjustments in practice patterns, with no adverse outcomes reported among pregnant physicians in their fields in the setting of appropriate radiation safety measures. The impact of radiation exposure during pregnancy for urologists is largely unknown. Our objective was to determine attitudes and practices of urologists related to radiation exposure and to characterize the experience of urologists who have previously been pregnant. Methods: An anonymous online survey was distributed through relevant society membership bases, which included the Endourological Society and the Society for Women in Urology, and social media. Demographics, practice patterns, and changes to practice patterns were recorded for respondents. Statistical analysis was performed in R studio. Results: There were 384 respondents, 255 of whom identified as women. Of these, 164 had been previously pregnant. Female respondents were younger, completed training more recently, and were more likely to have adjusted their caseload due to radiation concerns compared with their male counterparts. Of women who had been pregnant, few had access to policies for who to notify (19%), policies for safety precautions (22%), custom-fitted lead (35%), and maternity lead (20%). Most women (66%) relied on their own research for guidance on radiation safety during pregnancy, while some (41%) also used information from colleagues or mentors. Forty-six percent of women would have taken greater precautions during pregnancy than they did. Conclusions: Access to the appropriate tools to safely navigate pregnancy is inconsistent among practicing urologists. Evidence-based guidelines are needed to better empower pregnant urologists.

Who Are the Mentors of the Future Endourologist? An Analysis of Endourological Society Program Directors.

Introduction: Surgical training programs are pivotal in shaping skilled and compassionate surgeons, with mentors playing a crucial role in instilling clinical competence and essential attributes. This study aims to describe the characteristics of the program directors of Endourological Society-accredited fellowship programs. Methodology: The Endourological Society's website was used to identify program directors. The following data points were extracted: year of graduation from medical school, year of completing residency, if they had attended fellowship training or held additional degrees such as (PhD, MS, MBA, MSc, etc.), and number of publications on Scopus. Descriptive statistics were used to analyze the data. Results: A total of 84 fellowship programs and 115 program directors were identified. Geographically, 77.4% (n = 65) were in North America, 8.3% (n = 7) in Asia, 8.3% (n = 7) in the Middle East, 3.6% (n = 3) in Europe, and 2.4% (n = 2) in South America. Of the 115 program directors, 94.8% were male, and only 5.2% were female. Program directors graduated medical school with a median year of 1998 (1966-2015). Eighty percent attended fellowship programs, and 19.1% held additional degrees (PhD, MS, MBA, MSc, etc.). The median number of publications was 79 (4-1963), with a median citation of 1607 (1-43,565). The median H-index was 23 (range: 1-110). Conclusion: Most program directors of Endourological Society-accredited fellowship programs are fellowship-trained and a notable number held a second degree. However, a pronounced gender disparity is observed, with limited female representation among program directors. This assessment contributes valuable insights into the urology and endourology mentorship, emphasizing the need for broader diversity and inclusivity in leadership roles.

Interdisciplinary planning improves radiologist obtained access for percutaneous nephrolithotomy.

INTRODUCTION: Proper antegrade access for percutaneous nephrolithotomy (PCNL) is essential for success but can be challenging. Previous work evaluating access obtained by interventional radiology (IR), largely in the emergent setting, has shown high rates of additional access at the time of PCNL. We hypothesize that efforts to improve pre-procedural communication between urology and IR can impact the utility of the access for subsequent PCNL. MATERIAL AND METHODS: We conducted a retrospective review of patients undergoing PCNL at a single hospital from January 2011 to December 2022. Adult patients undergoing PCNL with established preoperative access were included. RESULTS: A total of 141 cases were identified with preoperative access. A total of 111 patients had evidence of planning with IR prior to antegrade access. There were high rates of anatomic abnormality (50%) and staghorn calculus (53%). Patients with planned access had higher body mass index (BMI). While preoperative access was initially utilized in 97% of cases, 6% required additional access to be obtained intraoperatively; this included a low rate of new access in those that were previously discussed with IR (4% vs. 17%, p = 0.02). Overall stone free rates (91%), rates of second stage procedures (55%) and complications (14%) were similar between planned and unplanned groups. CONCLUSION: In this retrospective study of complex patients with large stone burden presenting for PCNL with preoperative antegrade access obtained by IR, the rate of new access was far lower than prior reports. This was likely influenced by urologist involvement in planning access.

Accuracy of Radiology Reports for Obstructing Ureteral Stone Size in the Emergency Department.

OBJECTIVE: To evaluate the number of dimensions of obstructing ureteral stones in the emergency department (ED) described in present-day radiology computed tomography reports and assess for measurement discrepancies between radiologist and urologist review. METHODS: We conducted a single-center retrospective study of patients who presented to the ED with unilateral, solitary, obstructing ureteral stones from March 2018 to March 2021. Stone size in each reported dimension recorded by the radiologist was extracted from the chart and then compared to size independently measured by one of our urologists for all 3 stone dimensions. Our primary outcome was the number of stone dimensions included in the radiology report. RESULTS: In total, 181 patients were included for analysis. 82.3% of radiology reports described the stone in one dimension, 15% in two dimensions, and 2.7% in three dimensions. There was a significant difference in median maximal stone size between radiologist and urologist measurement (5.5 vs 6.5 mm, respectively, P < .001). One hundred fourteen stones (62%) had the maximal measurement recorded in the craniocaudal (CC) dimension by urologist review. Only 26% of radiology reports had the CC measurement included in the radiology report. CONCLUSION: Ureteral stone size in a present-day ED cohort is still frequently measured in only 1 or 2 dimensions. In many cases, this is associated with an absence of a reported CC measurement. Inadequate characterization of stone size may affect acute management. This study hopes to encourage reporting of all three dimensions of obstructing ureteral stones in the ED setting for improvements in patient management.

Linear relationship between absorbed radiation dose and pulse rate during fluoroscopy.

PURPOSE: To identify the relationship between fluoroscopy pulse rate and absorbed radiation dose. We compared absorbed radiation dose with common proxy measurements such as fluoroscopy time and C-arm reported dose. METHODS: Using a simulated patient model, 60 s fluoroscopy exposures were performed using pulse rates of 30, 8, 4, 2, and 1 pulse(s) per second. Each experiment was performed with both standard and low-dose settings using a GE OEC 9800 plus C-arm. Landauer nanoDot™ OSL dosimeters were used to measure the absorbed radiation dose. RESULTS: Fluoroscopy pulse rate and absorbed radiation dose demonstrated a linear correlation for both standard (R2 = 0.995, p < 0.001) and low-dose (R2 = 0.998, p < 0.001) settings. For any given pulse rate, using the low-dose setting reduced absorbed radiation dose by 58 ± 2.8%. Fluoroscopy time demonstrated a linear relationship with absorbed radiation dose for both standard (R2 = 0.996, p < 0.001) and low-dose (R2 = 0.991, p < 0.001) settings, but did not change with use of the low-dose setting. C-arm reported radiation dose correlated linearly with absorbed dose (R2 = 0.999) but consistently under-estimated measured values by an average of 49 ± 3.5%. Using a combination of 1 pulse-per-second and low-dose fluoroscopy, absorbed dose was reduced by 97.7 ± 0.1% compared to standard dose and 30 pulse-per-second settings. CONCLUSION: Absorbed radiation dose decreases linearly with fluoroscopy pulse rate during equivalent exposure times. Adjusting fluoroscopy pulse rate and utilizing low-dose settings significantly reduces overall absorbed radiation exposure by up to 98%.

International Alliance of Urolithiasis (IAU) guidelines on the metabolic evaluation and medical management of urolithiasis.

The aim of this study was to construct the fourth in a series of guidelines on the treatment of urolithiasis by the International Alliance of Urolithiasis (IAU) that by providing a clinical framework for the metabolic evaluation, prevention, and follow-up of patients with urolithiasis based on the best available published literature. All recommendations were summarized following a systematic review and assessment of the literature in the PubMed database from January 1976 to June 2022. Each generated recommendation was graded using a modified GRADE methodology. Guideline recommendations were developed that addressed the following topics: initial evaluation, metabolic testing, dietary measures, medical management, and follow-up of recurrent stone formers. It was emphasized by the Panel that prevention of new stone formation is as important as the surgical removal of the stones. Although general preventive measures may be effective in reducing stone recurrence rates in some patients, specific medical and dietary management should be well considered and eventually applied in an individualized manner based on the outcomes of metabolic work-up, stone analysis and some certain patient related factors. A detailed follow-up of each case is essential depending on the metabolic activity of each individual patient.

Obstructing ureteral calculus causing massive hydronephrosis in a renal allograft.

Nephrolithiasis is a rare complication of renal transplantation. Patients with an obstructing calculus in a renal allograft often lack the usual renal colic symptoms, and therefore present with atypical symptoms. Treatment of obstructing calculi is imperative to prevent renal allograft failure and other complications. We report the case of a 46-year-old man who presented 28 years after renal transplant with renal failure and massive hydronephrosis secondary to an obstructing calculus.

Perceptions and Experiences of Gender Equity Among Endourologists.

Introduction: Only 9.9% of practicing urologists in the United States are women. This percentage is even smaller in leadership positions and high-ranking appointments. Endourology is one of the least reported fellowships completed by women urologists. We sought to evaluate how endourologists perceived the climate for women physicians and compare perceptions and experiences of gender equity. Materials and Methods: An IRB approved and validated survey, Culture Conducive to Women's Academic Success (CCWAS) questionnaire was sent out to the Endourological Society listserve. Subcategories of equal access, work-life balance, freedom of gender bias, and leadership support were analyzed. An open comment section was provided for respondents to include their own experiences. Wilcoxon rank-sum and Kruskal-Wallis tests were used to compare CCWAS scores between groups. Results: A total of 104 completed surveys were received. Response rate was 7% (104/1492), 26.9% of which were female. There was a statistically significant difference between male and female respondent CCWAS scores; p < 0.05. The male CCWAS score median was 196.0 (interquartile range [IQR] 176.75-214.0) vs female CCWAS score median of 166.5 (IQR 127.5-210.0). There was no significant difference in CCWAS scores based on years in practice, parental status, or academic vs private practice. Discussion: In this study, male endourologists' perceptions of gender equity were incongruent with the reported experiences of their female colleagues. This indicates that male respondents perceive the culture in their department toward women more positively than their female colleagues. This is suggestive that there are gender-based differences in how gender inequities are perceived and potentially experienced.

Prospective randomized trial of 2 versus 12-weeks of postoperative antibiotics after percutaneous nephrolithotomy in complex patients with infection-related kidney stones.

PURPOSE: Treatment of struvite kidney stones requires complete surgical stone removal combined with antibiotic therapy to eliminate urinary tract infections and preventive measures to reduce stone recurrence. The optimal duration of antibiotic therapy is unknown. We sought to determine if 2- or 12-weeks of antibiotics post percutaneous nephrolithotomy (PNL) for infection stones resulted in better outcomes for stone recurrence and positive urine cultures. MATERIAL AND METHODS: This multi-center, prospective randomized trial evaluated patients with the clinical diagnosis of infection stones. Patients were randomized to 2- or 12-weeks of postoperative oral antibiotics (nitrofurantoin or culture-specific antibiotic) and included if residual fragments were ≤4 mm on computed tomography imaging after PNL. Imaging and urine analyses were performed at 3-, 6-, and 12-months post-procedure. RESULTS: Thirty-eight patients were enrolled and randomized to either 2-weeks (n = 20) or 12-weeks (n = 18) of antibiotic therapy post-PNL. Eleven patients were excluded due to residual fragments >4 mm, and 3 patients were lost to follow-up. The primary outcome was the stone-free rate (SFR) at 6 months post-PNL. At 3-, 6-, and 12-months follow-up, SFRs were 72.7% versus 80.0%, 70.0% versus 57.1%, 80.0% versus 57.1% (p = ns), between 2- and 12-week-groups, respectively. At 3-, 6-, and 12-months follow-up, positive urine cultures were 50.0% versus 37.5%, 50.0% versus 83.3%, and 37.5% versus 100% between 2- and 12-week groups, respectively (p = ns). CONCLUSIONS: For patients with stone removal following PNL, neither 2-weeks nor 12-weeks of postoperative oral antibiotics is superior to prevent stones and recurrent positive urine cultures.

Subcapsular hematoma in a solitary kidney: successful conservative management.

Subcapsular renal hematoma (SRH) is an infrequent complication of urologic interventions but can lead to serious consequences in patients with a solitary kidney. We present our experience with conservative management of a patient with a solitary kidney and multiple medical comorbidities who developed a SRH and subsequent renal failure after nephroureteral catheter placement. Literature on the management of this unique clinical scenario is limited. Herein, we share our experience with supportive care and temporary dialysis in a medically complex patient whose outcome is complete renal recovery.

Urinary Metabolic Disturbances During Topiramate Use and their Reversibility Following Drug Cessation.

OBJECTIVE: To understand the metabolic disturbances of stone formers currently taking topiramate and to examine the reversibility of these disturbances with cessation of the medication. MATERIALS AND METHODS: All progress notes written by 5 endourologists from a single academic center were retrospectively reviewed from January 2010 to July 2020 containing the words "topiramate" or "topamax." Inclusion criteria were age >18 and presence of either a 24-hour urine sample or stone analysis while on topiramate. In addition, a subgroup of 18 patients with 24-hour urine samples before and after stopping topiramate were identified. RESULTS: A total of 93 patients were identified and included for final analysis. Twenty-four hour urine samples were available in 67 patients and showed mean citrate excretion of 331 ± 322 mg/d, mean pH of 6.6 ± 0.5, and mean calcium phosphate supersaturation of 1.9 ± 1.1. In the subgroup analysis urinary citrate excretion increased from 225 mg/d to 614 mg/d (P <.01) and pH decreased from 6.59 ± 0.54 to 6.33 ± 0.47 (P = .06) after stopping topiramate. In addition, 114 stone events occurred in 73 distinct patients, with 50% of stones either pure or majority (≥50%) calcium phosphate by composition. CONCLUSION: Hypocitraturia and elevated pH is seen during topiramate use with resultant higher rate of calcium phosphate stone formation compared to the general population. Stopping topiramate leads to significant increase in citrate excretion and normalization of pH. These metabolic disturbances appear to be reversible with medication cessation.

Defining 24-hour urine parameters and kidney stone risk of student athletes.

PURPOSE: Dehydration is a risk factor for kidney stone formation. Studying populations that may experience dehydration without a known increased incidence of stone formation may help understand stone formation and prevention. High-caliber athletes represent such a population. We characterized the urinary environment of high-caliber athletes utilizing 24-hour urine collections with comparison to non-athlete controls. MATERIALS AND METHODS: After Institutional Review Board (IRB) and National Collegiate Athletic Association (NCAA) compliance officer approval, 74 college-student athletes and 20 non-athletes were enrolled. Demographics, medical history, and sport of participation were recorded. Participants were asked to provide 24-hour urine collections as well as diet and activity logs at the time of urine collection. Standard stone risk parameters were assessed and compared to litholink reference standards. RESULTS: 34 athletes and 10 non-athletes provided at least one 24-hour urine specimen for evaluation. Athletes had a high prevalence of urinary risks for stone formation including low volume (median 1.46 L), low citrate, high sodium, high calcium (females), and high uric acid (males). However, athletes also had a high prevalence of known stone-protective factors such as high urine magnesium. Athletes had a lower urine pH but high supersaturation of uric acid and calcium oxalate compared to non-athletes. CONCLUSION: Student athletes appear to have a high prevalence of urinary risk factors for stone formation such as dehydration, high calcium, high uric acid, high sodium, and low citrate. Overall stone risk in this population may be offset by increased levels of stone-protective factors such as magnesium. Further study of this population may help generate hypotheses for effective stone prevention strategies in the general population.

Safety During Ureteroscopy: Radiation, Eyes, and Ergonomics.

It is known that urologic surgeons are at risk of work-place injury due to the physical requirements of operating and exposure to hazards. These hazards include radiation, exposure to body fluids, use of laser energy, and orthopedic injury due to the physical nature of operating. The risks that these hazards present can be mitigated by implementing several evidence-based safety measures. The methods to protect against radiation exposure include keeping radiation usage in the operating room as low as reasonably achievable, donning lead aprons, and wearing protective glasses. Additionally, protective glasses decrease the risk of eye injury from laser injury and exposure to body fluids. Finally, practicing sound surgical ergonomics is essential to minimize the risk of orthopedic injury and promote career longevity. The interventions discussed herein are simple and easy to implement in one's daily practice of urology.

Minimizing radiation dose in management of stone disease: how to achieve 'ALARA'.

PURPOSE OF REVIEW: Exposure to radiation is known to have adverse effects such as secondary malignancies. Patients with nephrolithiasis are exposed to radiation in the workup and treatment of their condition. Furthermore, exposure to radiation is often repeated due to the high recurrence rate of nephrolithiasis. RECENT FINDINGS: We discuss practices inside and outside of the operating room to strive to keep radiation exposure as low as reasonably achievable (ALARA) for patients being treated for nephrolithiasis. These efforts include reduced dose computed tomography scans, fluoroless surgical techniques and new alternative technologies. SUMMARY: Maintaining radiation exposure ALARA for our patients is increasingly practical. The urologist must make every effort to adhere to ALARA principles to protect patients from the stochastic effects of radiation.

Unconventional Use of the Lithoclast to Aid in the Treatment of Large Distal Ureteral Stone Burden in a Patient With a Ureterocele.

INTRODUCTION: Large ureteral stone burden can present significant challenges for the urologist to treat. Here we present the retrograde use of the Lithoclast Select, in a dilated distal ureter after incision of a ureterocele. METHODS: The patient is a 64 year-old female with large distal ureteral stone burden, with approximately 15 1-2 cm stones. She presented with significant right flank pain, urinary urgency, frequency, dysuria, and recurrent urinary tract infections. RESULTS: A 22-French rigid cystoscope was inserted into the bladder. Urethral outlet was normal. Patient was noted to have 2 right-sided ureteral orifices, consistent with a completely duplex system. At the medial right ureteral orifice a very large ureterocele was noted. The lower pole system was scoped and stone free. The ureter to the upper pole moiety was scoped and a large stone burden within the distal ureter was visualized. The Plasmacise Gyrus was used to incise the anterior part of the ureter by inserting the Plasmacise into the ureteral orifice and tenting it anteriorly. The 24-French nephroscope was then inserted into the distal ureter. Graspers were used to extract many fragments however several were unable to be extracted from the distal ureter due to their size and thus were fragmented and evacuated with the ultrasonic lithoclast within the distal ureter. A 365-µ laser fiber was also used to fragment some of the stones. There were no complications. CT Scan 4 months post operatively was negative for stone recurrence. Last follow up was 15 months postprocedure where the patient was doing well. CONCLUSIONS: Utilization of the rigid nephroscope and ultrasonic lithotripter in a female patient with a dilated distal ureter with a capacious or incised ureterocele is safe and effective, allowing for treatment of greater than 15 cm total distal ureteral stone burden.

Business and Practice Readiness of Early Career Urologists: an Unmet Need.

INTRODUCTION: Business education in surgical residency, defined as contract negotiation, investing, financial planning and information on practice types, is currently lacking, and it is unknown if early career urologists possess this business education. Thus, we investigated how young urologists perceive their business knowledge and which vehicles of education they most prefer. METHODS: A 12-question survey was distributed to all urology residents, fellows and recent graduates to assess their self-reported business preparedness. Questions were administered concerning financial planning, familiarity with business models, ancillary income opportunities, coding and billing, contract negotiation, and awareness/use of AUA (American Urological Association) resources. Data were stratified by training year and practice type. The respondents were also asked their most preferred format for business education. RESULTS: A response rate of 10% was obtained with 230 total responses, including 89 (38.7%) from practicing urologists and 141 (61.3%) from trainees. The majority (88.3%) of respondents were not comfortable planning the business side of their practice and 71% were not aware of the AUA resources. Only 8% of practicing urologists and trainees were extremely comfortable with contract negotiation and 70% were not comfortable with assessing their own financial value. A majority was interested in podcasts, websites and online education. CONCLUSIONS: The survey results demonstrate a significant unmet need among early career urologists regarding business education. This self-reported lack of business literacy presents a blind spot in urological training. The development of an accessible business curriculum along with practical resources may have a vital role in the promotion of wellness and financial success among early career urologists.

Optimizing Outcomes in Urological Surgery: Intraoperative Patient Safety and Physiological Considerations.

INTRODUCTION: Intraoperative surgical outcomes are influenced by a wide variety of patient, surgeon and institutional factors. The current literature lacks comprehensive resources that describe best practices in preventing patient safety events and optimizing patient physiology during urological surgery. METHODS: A multidisciplinary panel of subject matter experts (urologists, nurses, anesthesiologists) was convened to evaluate the existing literature, create a white paper and disseminate this to urological providers. Focusing on intraoperative patient safety and physiology, a narrative review was undertaken and relevant guidelines and practical interventions were highlighted. RESULTS: Patient safety is optimized by preventing surgical site infections, wrong site surgery, venous thromboembolism, falls/positioning injuries, laser/fire injuries, excessive radiation exposure and harm from the adoption of new technology. Goals for intraoperative physiological parameters (temperature, glucose, fluid balance) are addressed as well as analgesic and anesthetic considerations in urological patients. In addition, practical tools are provided to assist in the quality improvement process. CONCLUSIONS: This article summarizes intraoperative factors related to patient safety and optimal physiology that can impact urological surgical outcomes. This overview can be used as a practical guide for process improvement to optimize the quality of intraoperative care.

Endoscopic diagnosis of renal pseudoaneurysm following ureteroscopy.

Renal pseudoaneurysm following ureteroscopy is a rare cause of hematuria usually diagnosed and treated with angiography and embolization. Here we present a case of a small pseudoaneurysm causing intermittent flank pain and gross hematuria associated with clot retention initially diagnosed during ureteroscopy and subsequently treated with a combined endourologic and endovascular approach.