Vulnerability to Financial Toxicity From Stone Surgery.

PURPOSE: Financial toxicity has been described in stone formers however little is understood regarding its causes and how it may relate to stone surgery. We therefore aimed to longitudinally describe markers of financial strain in stone formers from the preoperative to postoperative time points. MATERIALS AND METHODS: A prospective cohort study was conducted from January 2022 to April 2023. Patients were enrolled in the waiting area prior to undergoing elective ureteroscopy or percutaneous nephrolithotomy. Participants completed the Commonwealth Fund's Biennial Health Insurance Survey at this time point and at 30 days postop. Items were pre-selected from the survey to capture markers of financial strain due to healthcare costs. RESULTS: One hundred nine participants were enrolled. Participants were a majority white (70%), college educated (62%), and privately ensured (72%). Despite these traditionally protective sociodemographic features, 42% of patients reported some marker of financial strain at the preoperative timepoint. Patients with Medicaid reported even higher financial stress (67%). Furthermore, 46% of patients did not know their deductible amount. Response rate was low at 30 days postop (35%) but suggested some patients were experiencing new financial strains. CONCLUSIONS: This paper shows that a significant proportion of stone patients are already displaying markers of financial strain from healthcare bills even prior to surgery as well as poor understanding of the costs they may incur. This makes them vulnerable to experiencing financial toxicity postoperatively and emphasizes the importance of understanding all contributing factors when developing future strategies to intervene in financial toxicity.

Postoperative Recovery of Quality-of-Life Following Ureteroscopy for Nephrolithiasis: The Impact on Pain Intensity and Interference and the Ability to Participate in Social Roles.

OBJECTIVE: To prospectively capture patient-reported outcomes to assess the recovery profile of ureteroscopy (URS). MATERIALS AND METHODS: Adults undergoing URS for renal/ureteral stones were eligible for inclusion (11/2020-8/2022). Patients prospectively completed PROMIS - Pain Intensity, - Pain Interference, and - Ability to participate in social roles and activities in-person preoperatively (POD 0) and via email on POD 1, 7, 14, and 30. Scores are reported as T-scores (normalized to U.S. population, mean=50) with a change of 5 (0.5 SD) considered clinically significant. RESULTS: One hundred and seventy-eight participants enrolled at POD 0 (POD 1 =87, POD 7 =83, POD 14 =70, POD30 =67). There was a worsening of quality of life from day 0 to day 1 and day 0 to 7. All dimensions then improved with an increase in scores from day 0 to day 14 and day 0 to day 30. On multivariable analysis, the presence of a preoperative ureteral stent (OR 0.14) and use of semirigid URS (OR 0.33) were associated with a reduced odds for severe pain interference at day 1. The use of semirigid URS (OR 0.20) was associated with a reduced odds for severe worsening in the ability to participate in social roles at day 1. CONCLUSION: Ability to participate in social roles declines immediately postoperatively, while pain intensity and interference sharply increase. There is a gradual improvement until POD 30. Findings suggest preoperative stents may influence postoperative recovery. Results offer meaningful insight to assist in counseling and setting expectation for patients postoperatively.

The Endourological Society Inaugural Census Report.

The Endourological Society, the premier urologic society encompassing endourology, robotics, and focal surgery, is composed of a diverse group of >1300 urologists. However, limited information has been collected about society members. Recognizing this need, a survey was initiated to capture data regarding current member practices, as well as help the Society shape the future direction of the organization. Presented herein is the inaugural Endourological Society census report as the beginning of a continued effort for global improvement in the field of endourology. Using a REDCap® database, an email survey was circulated to the membership of the Endourological Society from May through June 2021. Twenty questions were posed, categorizing member data in terms of epidemiology/demographics, practice patterns, member opinions, and future educational preferences. Responses were received from 534 members, representing 40.3% of membership. Data demonstrated that the average age, gender, race, and ethnicity of the typical Society member respondent is a 48-year-old Caucasian male working in the United States, with a mean of 25 years in practice. Retrograde endoscopy and percutaneous nephrolithotomy were identified as the most common practice skills, and 50% of members are involved in robotics. Importantly, the census confirmed that the World Congress of Endourology and Technology remains popular with Society members as a means of educational advancement. To sustain and advance the Society, information is required to understand the career interests and future educational desires of its members. This inaugural census provides crucial data regarding its membership and how the Society can achieve continued success and adjust its focus. Future census efforts will expand on the initial findings and stratify the data to elucidate changes in the needs of the Society as a whole. Circulating an annual census will allow for continued improvements in the field of endourology and, ultimately, better care for urologic patients.

Longitudinal Changes in Quality of Life After Ureteroscopy for Nephrolithiasis.

OBJECTIVE: To assess alterations in health-related quality of life (HRQOL) in patients with nephrolithiasis, given the limited prospective data on patient reported outcomes following surgical intervention with ureteroscopy. METHODS: Adults with either a renal or ureteral calculus who underwent ureteroscopy (URS) were recruited prospectively from 2017-2020. Participants completed the PROMIS-29 profile which measures the dimensions of physical function, fatigue, pain interference, depressive symptoms, anxiety, ability to participate in social roles and activities, and sleep disturbance at enrollment, 1-, 6-, and 12-months. Scores are reported as T-scores (normalized to US-population) and were compared at each time point against the mean for the US-population (50) using one-sample Welch's t'test and between each pairwise time point comparison using a Wilcoxon signed rank test. RESULTS: At enrollment, a total of 69 participants completed the PROMIS-29 survey. As compared to the US-population mean, participants at enrollment had significantly different scores in physical function, fatigue, pain interference, depressive symptoms, anxiety, and sleep disturbance (all P<.05), but not ability to participate in social roles and activities. In pairwise comparisons, improvement was only observed from enrollment to 1-month in pain interference (P<.01) and fatigue (P = .03). However, there was improvement at a longer interval from enrollment to 12-months in all dimensions (pairwise comparisons, all P<.05) except depressive symptoms. CONCLUSION: The PROMIS-29 profile is responsive to changes in HRQOL for patients with nephrolithiasis undergoing URS, with improvement of PROMIS scores up to 12-months. This information can be utilized for patient counseling to guide expectations during the recovery period.

Quality of life impact and recovery after ureteroscopy and stent insertion: insights from daily surveys in STENTS.

BACKGROUND: Our objective was to describe day-to-day evolution and variations in patient-reported stent-associated symptoms (SAS) in the STudy to Enhance uNderstanding of sTent-associated Symptoms (STENTS), a prospective multicenter observational cohort study, using multiple instruments with conceptual overlap in various domains. METHODS: In a nested cohort of the STENTS study, the initial 40 participants having unilateral ureteroscopy (URS) and stent placement underwent daily assessment of self-reported measures using the Brief Pain Inventory short form, Patient-Reported Outcome Measurement Information System measures for pain severity and pain interference, the Urinary Score of the Ureteral Stent Symptom Questionnaire, and Symptoms of Lower Urinary Tract Dysfunction Research Network Symptom Index. Pain intensity, pain interference, urinary symptoms, and bother were obtained preoperatively, daily until stent removal, and at postoperative day (POD) 30. RESULTS: The median age was 44 years (IQR 29,58), and 53% were female. The size of the dominant stone was 7.5 mm (IQR 5,11), and 50% were located in the kidney. There was consistency among instruments assessing similar concepts. Pain intensity and urinary symptoms increased from baseline to POD 1 with apparent peaks in the first 2 days, remained elevated with stent in situ, and varied widely among individuals. Interference due to pain, and bother due to urinary symptoms, likewise demonstrated high individual variability. CONCLUSIONS: This first study investigating daily SAS allows for a more in-depth look at the lived experience after URS and the impact on quality of life. Different instruments measuring pain intensity, pain interference, and urinary symptoms produced consistent assessments of patients' experiences. The overall daily stability of pain and urinary symptoms after URS was also marked by high patient-level variation, suggesting an opportunity to identify characteristics associated with severe SAS after URS.

Emergency department and hospital revisits after ambulatory surgery for kidney stones: an analysis of the Healthcare Cost and Utilization Project.

Our objective was to identify the rate of revisit to either emergency department (ED) or inpatient (IP) following surgical stone removal in the ambulatory setting, and to identify factors predictive of such revisits. To this end, the AHRQ HCUP ambulatory, IP, and ED databases for NY and FL from 2010 to 2014 were linked. Cases were selected by primary CPT for shock-wave lithotripsy (SWL), ureteroscopy (URS), and percutaneous nephrolithotomy (PNL) with accompanying ICD-9 for nephrolithiasis. Cystoscopy (CYS) was selected as a comparison group. The risk of revisit was explored using multivariate models. The overall unplanned revisit rate following stone removal was 6.4% (4.2% ED and 2.2% IP). The unadjusted revisit rates for SWL, URS, and PNL are 5.9%, 6.8%, and 9.0%, respectively. The adjusted odds of revisit following SWL, URS, and PNL are 1.93, 2.25, and 2.70 times higher, respectively, than cystoscopy. The majority of revisits occurred within the first two weeks of the index procedure, and the most common reasons for revisit were due to pain or infection. Younger age, female sex, lower income, Medicare or Medicaid insurance, a higher number of chronic medical conditions, and hospital-owned surgery centers were all associated with an increased odds of any revisit. The most important conclusions were that ambulatory stone removal has a low rate of post-operative revisits to either the ED or IP, there is a higher risk of revisit following stone removal as compared to urological procedures that involve only the lower urinary tract, and demographic factors appear to have a moderate influence on the odds of revisit.

A Longitudinal Cohort Study of Pain Intensity and Interference After Ureteroscopy for Nephrolithiasis Without Postoperative Opioids.

OBJECTIVE: To better understand the degree and time to resolution of pain in the postoperative period, we captured patient-reported pain intensity and interference prospectively in patients following ureteroscopy for nephrolithiasis. MATERIALS AND METHODS: Adults undergoing ureteroscopy for renal/ureteral stones from 11/2018 to 1/2020 were eligible for inclusion. All received nonopioid postoperative pain control. Patients prospectively completed Patient-Reported Outcome Measurement Information System-Pain Intensity and Patient-Reported Outcome Measurement Information System-Pain Interference instruments preoperatively on postoperative day (POD) 0 and via email on POD 1, 7, and 14. Scores are reported as T-scores (normalized to US population, mean = 50) with changes of 5 (0.5 standard deviation) considered clinically significant. RESULTS: A total of 126 patients completed enrollment at POD 0 (POD 1 = 74, POD 7 = 61, POD 14 = 47). Compared to US means, intensity and interference were significantly different at all time point comparisons (Wilcoxon rank test; all P <.001) except intensity at POD 7 (P = .09) and interference at POD 14 (P = .12). For both, there was a significant difference at each time comparison (repeated measures ANOVA; all P <.05). Increasing age was predictive of lower intensity (Confidence Interval (CI): -0.31 to -0.04; P = .012) and interference (CI: -0.36 to -0.06; P =.01) at POD 1. The presence of a postoperative stent was predictive of higher intensity (CI: 0.68-10.81; P = .03) and interference (CI: 0.61-12.96; P = .03) at POD 7. Increasing age remained a predictor of lower interference at POD 1 on multivariable analysis (CI: -0.46 to -0.01; P = .03). CONCLUSION: Pain intensity and interference are elevated immediately, but intensity normalizes by POD 7, while interference remains elevated until POD 14. Age and indwelling ureteral stent influence both intensity and interference.

An Analysis of the US News & World Report Methodology for Attribution of Specialty Care in Otolaryngology and Urology.

US News & World Report (USNWR) rankings can assist patients with choosing where to receive their specialty care. USNWR methodology assumes that the specialty caring for hospitalized patients is equivalent to the specialty assigned by administrative coding. We examined the frequency of discordance between USNWR methodology-assigned specialty and the actual specialty care received for 2 surgical specialties, otolaryngology (ENT) and urology (GU). Our analysis included inpatient deaths identified by USNWR coding for these specialties from 2013 to 2017 at a single academic tertiary care center. We found that a minority of patients with deaths attributed by USNWR to these 2 specialties were actually cared for by ENT (6/14; 43%) or GU (3/19; 16%). Only 5 of 14 (36%) and 2 of 19 (11%) deaths were potentially associated with ENT and GU care, respectively. We identified a significant discordance between USNWR-assigned specialty and the actual specialty care received.

Preventing Excess Narcotic Prescriptions in New Robotic Surgery Discharges: The PENN Prospective Cohort Quality Improvement Initiative.

Purpose: To reduce the amount of opioids prescribed at discharge after robotic surgery, we hypothesized that the majority patients do not require opioids for pain control after robotic urologic oncologic procedures. Materials and Methods: This prospective study aimed to reduce opioids prescribed at discharge after robot-assisted radical prostatectomy (RARP), robot-assisted radical nephrectomy (RARN), and robot-assisted partial nephrectomy (RAPN). Before 9/2018, 100% of patients were discharged on varying amounts of oxycodone (range: 75-337.5 oral morphine milligram equivalents [MME]). We implemented a standardized nonopioid analgesia pathway with escalation options (Fig. 1). To assess the safety of our approach, we analyzed pain scores, telephone encounters, and emergency department visits in our cohort. Results: Our cohort (n = 170) consisted of patients undergoing RARP (n = 87), RARN (n = 25), and RAPN (n = 58) between September 2018 and January 2019. Overall, 67.7% were discharged without opioids, 24.4% with 10 pills of tramadol (50 MME), and 8.2% with 10 pills of oxycodone (75 MME). On multivariable analysis, older age (odds ratio: 0.961, 95% confidence interval: 0.923-0.995, p = 0.026) was associated with lower odds of needing opioids at discharge. There was no difference in pain scores at the postoperative outpatient visit (p = 0.66) or postoperative telephone encounters (p = 0.45) between those discharged with and without opioids. Conclusion: The majority of robotic surgery patients do not require opioids upon discharge. Implementation of a simple, standardized nonopioid protocol resulted in a dramatic reduction in the amount of opioids prescribed in our patient population. An escalation protocol allows for a patient-centered approach to reduce narcotic prescribing, although still addressing surgical pain.

Trends in the Setting and Cost of Ambulatory Urological Surgery: An Analysis of 5 States in the Healthcare Cost and Utilization Project.

INTRODUCTION: With the rising costs of health care, surgical procedures have migrated from the inpatient to outpatient setting with more than 60% of urological procedures performed in the ambulatory setting. Ambulatory surgical centers have the potential to reduce costs but may also lead to overutilization. We assessed utilization of ambulatory surgical centers for urological procedures, case mix distribution compared to hospital based outpatient surgery departments and cost implications. METHODS: All outpatient urological procedures were identified from 5 states in the United States (2010 to 2014) using all payer data. Patient demographics, regional data, facility type (ambulatory surgical center vs hospital based outpatient surgery department) and total charges (converted to costs and inflation adjusted to 2014 USD) were determined. Analyses of overall number of procedures, population adjusted rates, annual percent change and adjusted linear regression models were performed. RESULTS: Of more than 37 million surgical procedures 1,842,630 (4.9%) were urological with overall annual percent change +0.97% (+1.09% hospital based outpatient surgery departments vs +0.41% ambulatory surgical centers) and 20.0% performed in ambulatory surgical centers. The proportion performed in ambulatory surgical centers decreased slightly with time (-0.48% per year, p <0.001). Overall costs totaled $4.78 billion, representing 7.6% of all ambulatory surgery (average cost per procedure $2,603.76). All procedures demonstrated reduced costs per case when performed in ambulatory surgical centers (range -$800 to -$1,800). Unadjusted net cost increase per procedure per year was +$147.79 (+$113.98 adjusted). Providers performing the top quartile (Q1) of procedures demonstrated reduced costs. CONCLUSIONS: Ambulatory urological surgery represents 5% of all surgical cases but 7.6% of costs. The rate of procedures is increasing steadily with performance in ambulatory surgical centers outpaced by those in hospital based outpatient surgery departments. The cost of ambulatory urological surgery is rising out of proportion to explanation by inflation, patient factors or case mix.

Individual renal unit urine sampling to identify unilateral metabolic defects
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AIMS: Preventing kidney stone recurrence relies on detecting and modifying urine chemistry abnormalities. The assumption is that an abnormality is due to a global metabolic defect present in both kidneys. However, we hypothesize that clinically significant unilateral defects may exist. We aimed to identify these patients by sampling urine from each renal unit. MATERIALS AND METHODS: Adults undergoing retrograde upper urinary tract surgery were eligible for inclusion. Excluded were patients with a solitary kidney, suspected urothelial malignancy, or urinary tract infection. Following informed consent, all patients proceeded to the operating room. After induction of anesthesia, cystoscopy with ureteral catheterization was performed with urine collected via gravity drainage for 10 minutes. Urine samples with adequate volume were analyzed for chemistry concentrations. A difference greater than the 75th percentile between matched pairs was considered significant. For urine pH, a difference of 0.5 was considered significant. RESULTS: A total of 47 patients were screened for eligibility with only 13 (28%) electing to enroll in the study (26 renal units). All subjects underwent successful bilateral ureteral catheterization with no adverse events observed or later reported. The mean (± SD) urine volume captured from the right and left renal units was 5.0 ± 7.4 cm3 and 6.6 ± 6.4 cm3, respectively. Urine was only captured from paired renal units in 8 participants (8/13; 62%). Of these 8 participants, 5 (5/8; 63%) had at least 1 unilateral metabolic defect. CONCLUSION: Unilateral renal unit urine sampling is safe and feasible. However, captured urine volumes are small and variable, but chemical analysis can still be performed. Unilateral defects in renal electrolyte handling are relatively common, but the clinical implications of these differences are still yet to be determined.
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Evidence-Based Guidelines to Eliminate Repetitive Laboratory Testing.

Routine daily laboratory testing of hospitalized patients reflects a wasteful clinical practice that threatens the value of health care. Choosing Wisely initiatives from numerous professional societies have identified repetitive laboratory testing in the face of clinical stability as low value care. Although laboratory expenditure often represents less than 5% of most hospital budgets, the impact is far-reaching given that laboratory tests influence nearly 60% to 70% of all medical decisions. Excessive phlebotomy can lead to hospital-acquired anemia, increased costs, and unnecessary downstream testing and procedures. Efforts to reduce the frequency of laboratory orders can improve patient satisfaction and reduce cost without negatively affecting patient outcomes. To date, numerous interventions have been deployed across multiple institutions without a standardized approach. Health care professionals and administrative leaders should carefully strategize and optimize efforts to reduce daily laboratory testing. This review presents an evidence-based implementation blueprint to guide teams aimed at improving appropriate routine laboratory testing among hospitalized patients.

Evaluating the Ergonomics of Flexible Ureteroscopy.

INTRODUCTION: To date, the ergonomics of flexible ureteroscopy (URS) have not been well described. We performed a study to assess the biomechanical stresses on urologists performing URS and to investigate the effect of ureteroscope type on these parameters. METHODS: Electromyography (EMG) was used to quantify the activation level of muscle groups involved in URS. Surface EMG electrodes (Delsys, Boston, MA) were placed on the right and left thenar, flexor carpi ulnaris (FCU), extensor carpi ulnaris (ECU), biceps, triceps, and deltoid. Three endoscopes were studied: single-use digital (Boston Scientific LithoVue), reusable digital (Karl Storz Flex-Xc), and reusable fiber-optic (Karl Storz Flex-X2). Each ureteroscope was used to perform a set sequence of navigation and procedural tasks in a training model. EMG data were processed and normalized to compare the maximum voluntary contractions between muscle groups. Cumulative muscular workload (CMW) and average muscular work per second (AWS) were used for comparative analysis. RESULTS: For navigational tasks, CMW and AWS were greatest for the ECU, followed in descending order by right and left thenar, FCU, biceps, deltoid, and triceps. For procedural tasks, CMW and AWS were greatest for the right thenar, followed in descending order by the left thenar, ECU, FCU, triceps, biceps, and deltoid. During navigational tasks, both LithoVue and Flex-Xc had lower CMWs for every muscle group than Flex-X2 (p < 0.05). LithoVue and Flex-Xc had similar AWS and both were lower than Flex-X2 for the right thenar, ECU, biceps, and deltoid activation (p < 0.05). During procedural tasks, both LithoVue and Flex-Xc had lower CMWs and AWS for right and left thenar, ECU, and biceps than Flex-X2 (p < 0.05). CONCLUSIONS: This study provides the first description of EMG-measured ergonomics of URS. Both the single-use and reusable digital ureteroscopes have similar profiles, and both have significantly better ergonomic metrics than the reusable fiber-optic ureteroscope.

Preventing the Forgotten Ureteral Stent by Using a Mobile Point-of-Care Application.

INTRODUCTION: The forgotten ureteral stent (FUS) can lead to patient morbidity. To date, tracking ureteral stents is a cumbersome task, given their high frequency of insertion and variable indwelling times. To simplify this process, an application was developed to track patients with indwelling ureteral stents. We report our initial user experience and clinical outcomes with this application. METHODS: Ureteral Stent Tracker™ (UST) is a secure, Health Insurance Portability and Accountability Act (HIPPA)-compliant, cloud-based point-of-care application. It is designed for logging stent insertion, scheduling the date of anticipated stent extraction, and confirming stent removal. It is accessible via a mobile phone application or web browser interface. We consecutively enrolled all patients who underwent ureteral stent insertion for any indication by two urologists from January 10, 2015, to October 10, 2016. A retrospective chart review was performed of all patients included in the UST database. Data extracted included patient demographics, diagnosis, procedure, and stent characteristics. RESULTS: A total of 115 patients were included with a mean age of 52.4 years; 54% (62/115) were male and 58% (67/115) were Caucasian. This cohort represented 146 ureteral stent care plans with 23 patients (23/115; 20%) having more than one care plan during the study period. The most common procedure performed was ureteroscopy (70/146; 48%) for a diagnosis of nephrolithiasis (108/146; 74%). The median indwelling ureteral stent time was 14 days (interquartile range: 7-45 days). A total of three patients (3/115; 3%) did not return for their scheduled extraction, but were identified only through the application. Each patient was contacted, resulting in effective removal of all three stents in the office. CONCLUSIONS: Tracking of ureteral stents is critical to prevent the patient safety issue of the FUS. The UST is a secure, HIPPA-compliant, cloud-based application, which once incorporated into the workflow of a urologic practice can prevent the FUS.

Residents' self-report on why they order perceived unnecessary inpatient laboratory tests.

Resident physicians routinely order unnecessary inpatient laboratory tests. As hospitalists face growing pressures to reduce low-value services, understanding the factors that drive residents' laboratory ordering can help steer resident training in high-value care. We conducted a qualitative analysis of internal medicine (IM) and general surgery (GS) residents at a large academic medical center to describe the frequency of perceived unnecessary ordering of inpatient laboratory tests, factors contributing to that behavior, and potential interventions to change it. The sample comprised 57.0% of IM and 54.4% of GS residents. Among respondents, perceived unnecessary inpatient laboratory test ordering was self-reported by 88.2% of IM and 67.7% of GS residents, occurring on a daily basis by 43.5% and 32.3% of responding IM and GS residents, respectively. Across both specialties, residents attributed their behaviors to the health system culture, lack of transparency of the costs associated with health care services, and lack of faculty role models that celebrate restraint. Journal of Hospital Medicine 2015;11:869-872. © 2015 Society of Hospital Medicine.

Care of acute renal colic: a survey of emergency medicine physicians.

INTRODUCTION: To determine the contemporary practice patterns of academic emergency department (ED) providers in the United States for an episode of acute renal colic. MATERIALS AND METHODS: A 30-question survey was developed to assess ED providers' clinical decision making for an index patient with acute renal colic. The survey population was all attending and resident physicians affiliated with an American emergency medicine residency program with an institutional profile available on the Society for Academic Emergency Medicine (156 programs; 95% of programs in the United States). The survey was conducted in October 2014. A response rate of 8.1% (289/3563) was achieved, which represented 29% (46/156) of the programs. RESULTS: Only 17% (53/289) of respondents were aware of the American Urological Association (AUA) guidelines on the management and imaging of ureteral calculi. A clinical care pathway was uncommon amongst institutions (6/46; 13%), but desired by providers (193/289; 67%). A low dose non-contrast computed tomography (CT) would be the most preferred initial diagnostic imaging modality (139/289; 48%). Initial imaging choice was not influenced by respondent role, program, census region, practice environment, ED size, ED volume, presence of a clinical care pathway, or knowledge of the AUA guidelines (all p > 0.05). CONCLUSIONS: In this cross-sectional survey of academic emergency medicine providers, we demonstrated a lack of awareness of quality initiatives and uncommon use of clinical care pathways. We observed that diagnostic imaging modalities with reduced radiation were commonly preferred, and that imaging preference was not associated with several demographic or institutional characteristics.

Understanding the costs of flexible ureteroscopy.

Ureteroscopy (URS) is the first line treatment for the majority of symptomatic renal and ureteral stones. This review summarizes the current literature on the costs associated with URS. A high initial investment is required for scope acquisition. Once purchased, maintenance and repair costs continue to accrue. Durability of the scopes is an important consideration as more durable scopes will remain functional for longer and thus have lower overall repair costs. Currently available, newer generation scopes appear highly durable compared to their predecessors. Ancillary equipment, mostly disposable items represent the highest per procedure cost of URS. Despite these costs, URS remains highly profitable. However, it is also efficacious demonstrating superior cost-effectiveness with higher stone free rates at a lower cost relative to shock wave lithotripsy.

Minimally Invasive ("Mini") Percutaneous Nephrolithotomy: Classification, Indications, and Outcomes.

Minimally invasive endoscopic procedures are often employed for the surgical removal of kidney stones. Traditionally, large stones are removed by (standard) percutaneous nephrolithotomy (SPCNL). Although effective for the clearance of large stone burdens, SPCNL is associated with significant morbidity. Therefore, in an effort to reduce this morbidity, while preserving efficacy, mini-PCNL (MPCNL) with a smaller tract size (<20 French) was developed. Several studies suggest that MPCNL has a comparable stone-free rate to SPCNL. However, the question of lower morbidity with MPCNL remains unanswered. In this review, we describe the equipment, indications, and efficacy of MPCNL with particular attention to its value over traditional minimally invasive stone removal techniques.