Stone Size Research Articles

EGS SO07 - Laparoscopic retrieval of endoscopic lithotripsy basket aided by laser fragmentation: Case presentation and literature review

Abstract Background Large or impacted common bile duct (CBD) stones that cannot be removed by conventional endoscopic methods sometimes require endoscopic mechanical lithotripsy. A rare but feared technical complication related to this is basket entrapment, where the stone-basket complex cannot be separated from each other due to mechanical failure and becomes impacted within the CBD. We present a novel case of laparoscopic CBD exploration and antegrade laser fragmentation of impacted stone-basket complex, and perform a literature review pertaining to this topic. Method This is a case report from a single district general hospital with laparoscopic capabilities but no access to Spyglass. The operation began with fundus first subtotal cholecystectomy and the cystic duct was ligated with PDS endoloops. A choledochotomy was made and dilated to allow insertion of a 7.5 Fr cholangioscope. Through this, laser lithotripsy was undertaken which reduced the stone size and permitted disengagement of the stone from basket. The stone was retrieved via enlargement of the choledochotomy, while the basket and wire retrieved orally. We subsequently performed a literature review of Pubmed, Google Scholar, and Embase. Results Laparoscopic retrieval of an impacted basket was first described in 1993, with the basket found lodged in the gallbladder. The technique involved a large cholecystotomy, followed by removal of the basket, closure of the gallbladder, and then cholecystectomy. Our literature review yielded 5 case reports of laparoscopic retrieval of basket from the CBD. Three authors describe manual disengagement of the basket by laparoscopic manipulation of the wires, one describes capturing an impacted Dormia basket with a second Dormia basket, and one describes direct mechanical fragmentation and subsequent balloon trawl of the remaining debris. Conclusion To our knowledge, this is the first case report describing laparoscopic CBD exploration with concurrent laser fragmentation to facilitate retrieval of impacted stone-basket complex following mechanical lithotripsy failure. We propose that this is a viable option in centres without Spyglass or electrohydraulic lithotripsy, but where expertise for emergency laparoscopic CBD exploration exists.

Safety and Effectiveness of Urologist-Directed Extracorporeal Shock Wave Lithotripsy for Pancreatolithiasis.

Introduction: Extracorporeal shock wave lithotripsy (SWL) can be used in conjunction with endoscopic retrograde cholangiopancreatography (ERCP) for the treatment of large (≥5 mm) or impacted pancreatolithiasis. We report our experience demonstrating the safety and effectiveness of urologist-directed SWL for pancreatolithiasis. Methods: We performed a retrospective review of all patients undergoing SWL for pancreatolithiasis at our institution between 2016 and 2020. We defined a treatment cycle as one in which the patient underwent a predefined number of SWL procedures prior to performance of a post-SWL ERCP. Stone-free status was defined as the absence of stone fragments at post-SWL ERCP. Multivariable logistic regression was performed to determine characteristics associated with stone persistence after a treatment cycle. Results: There were 44 patients who underwent 59 treatment cycles consisting of 118 pancreatic SWL procedures. Forty-two cycles (71.2%) were staged, and 17 (28.8%) were not staged. The median size of the largest pancreatic stone was 9 mm [IQR 6-11] and was impacted in 38 cases (64.4%). Patients reported pain in 51 cases (86.4%), of which 28 required the use of opioid analgesics. Patients were rendered stone free in 38 cycles (64.4%). Pain improvement was noted in 39 cases (66.1%), and the reduction in opioid use was statistically significant (28 cases vs. 10 cases, P = 0.004). Impacted stones were associated with an increased odds of stone persistence (OR 7.04, 95% CI 1.14-43.43, P = 0.04). Conclusions: In this joint venture with gastroenterology, we demonstrate that urologist-directed SWL for pancreatolithiasis is safe, effective, and in line with published rates.

A rare complication after ureterorenoscopy lithotripsy: Subcapsular renal hematoma.

To evaluate the prevalence, risk factors, clinical manifestations, and outcomes of subcapsular renal hematoma (SRH) following ureterolithotripsy. Between January 2014 and December 2023, patients who underwent ureterorenoscopy lithotripsy (URL) at our hospital were retrospectively reviewed. Clinical data including basic information, calculi-related indicators, and perioperative period data were collected. A Student's t-test was used for continuous data, while a Chi-square test or Fisher's exact test was utilized for categorical data. A total of 2098 patients treated with URL for ureteric stones were included in this study. The incidence of SRH after URL was 0.52% (11 cases). All SRH cases were confirmed by non-contrast computed tomography, with an average patient age of 55.54 years (range 34-84). The mean stone size in patients with SRH was 10.54 cm (range 0.8-1.5). Patients with SRH had a higher proportion of severe hydronephrosis caused by ureteral stones (54.55% vs 26.07%, p = 0.032) and narrow ureters (45.45% vs 8.04%, p < 0.001) compared to those without SRH. Patients with SRH experienced a longer length of stay, with a significant difference between the two groups (11.64 ± 5.05 vs 3.87 ± 8.12, p < 0.001). Nine patients were managed conservatively without further intervention, while embolization was required in one patient and percutaneous drainage was performed in another. All SRH cases resolved completely during a 4-month follow-up. The incidence of SRH following URL is low, with severe hydronephrosis and narrow ureters identified as risk factors. Most SRH cases can be successfully managed conservatively, although patients with SRH may experience a significant prolongation of their length of stay.

COMPARISON OF LASER AND PNEUMATIC LITHOTRIPSY FOR MID AND LOWER URETERAL STONES: “AN ANALYTICAL REVIEW” AT TERTIARY CARE CENTER

Objectives: Management of large lower and mid ureteric stones represents a treatment challenge. The main objective of stone treatment is to achieve the highest stone-free rate with minimal morbidity. Available modalities are medical therapy, open surgery, laparoscopic surgery, endoluminal surgery and extracorporeal shock wave lithotripsy (ESWL). After the invention of uretero-renoscopy (URS) and ESWL in 1980s, there has been a paradigm shift in the treatment modality of ureteric calculus from open surgery to endoluminal and non-invasive method. There are various modalities for stone fragmentation in URS – electrohydrolic lithotripsy, pneumatic. Ultrasonic, laser and dual energy source (Ultrasound+Pneumatic) Lithotripsy. Both laser lithotripsy (LL) and pneumatic lithotripsy (PL) have favourable outcomes The aim of this study was to compare efficacy of pneumatic versus laser lithotripters for Mid and lower ureteric calculi in regional population at KIMS, Hubballi. Methods: This was a prospective comparative study done in 116 cases of mid and lower ureteric calculi (58 in PL and 58 in LL) at karnataka institute of medical sciences, Huballi from May 2022 to November 2022. Patients were randomly divided into two groups: Group 1 had PL, while Group 2 had lithotripsy using a laser energy source. For PL group, 0.8 and 1 mm probe was passed through working channel of URS. LL was performed using a 100- W holmium:yttriumaluminium-garnet (YAG)-pulsed laser machine, with 365 μm fibres. Complications were graded according to the Clavien-Dindo Grading System. Results: In all, 116 patients (78 male and 38 female) with a mean age of 36.21 years were included in the study, Varying from 18 to 75 years. In group one 58 patients under went PL out of which 41 were males and 17 were females. In group two 58 patients under went LL out of which 37 were males and 21 were females. In group one (PL) mean operative with SD was 42.10±(10.16) min, and in group two (LL). Mean operative with SD was 46.78±(9.36) min, with p=0.011, which was statistically significant. Mean hospital stay ±SD (days) in PL group was 2.69±(0.730) days, and in group two LL mean hospital stay ±SD (days) was 2.40±(0.591) with p=0.019, which was statistically significant. In group one out of 58 patients, 11 patients had stone migration with % of an 18.96% and in group two out of 58 patients 2 patient had stone migration of, with % of 3.44%, with p=0.008, which is statistically very significant. Post operatively 7 patients in group one needed auxillary procedures, 3 patients needed ESWL, 3 patients needed. Re URSL and one patient needed bladder clot evacuation with DJ stenting, In all these patients stone size was larger than 15 mm, In Group 2 no patient needed Auxillary procedure, with p=0.003 which is statistically significant. Conclusion: Both pneumatic and LL are standard and safe techniques for the management of lower and mid ureteric calculi. Our study showed LL had less stone migration, and no need for reintervention.

Prospective Evaluation of Outcomes and Complications in Ultra-Mini-Percutaneous Nephrolithotomy for Pediatric Nephrolithiasis: A Three-Year Study

Objective: This prospective study aimed to evaluate the outcomes and complications of Ultra-Mini Percutaneous Nephrolithotomy (UM-PCNL) in pediatric patients with renal calculi over a three-year period (2021-2023). We assessed Stone-Free Rates (SFR), operative success and perioperative complications to determine the efficacy and safety of UM-PCNL in children. Methods: Seventy-eight pediatric patients (aged 1-17 years) underwent UM-PCNL for renal calculi larger than 10 mm. Preoperative imaging, including ultrasonography and computed tomography, was utilized to assess stone size and location. Surgical outcomes, including SFR, operative time and the need for second-look procedures, were evaluated. Complications were graded using the Clavien-Dindo classification. Statistical analysis was conducted using SPSS, with a significance threshold of p &lt; 0.05. Results: The mean stone size was 18.2 ± 5.4 mm and the overall SFR after a single UM-PCNL procedure was 78.2%. Clinical success (defined as either stone-free status or clinically insignificant residual fragments) was achieved in 89.7% of patients. The mean operative time was 67 ± 22 minutes. Second-look procedures were required in 11.5% of cases. The overall complication rate was 19.2%, with no major complications (Clavien grade III-V). Minor complications included transient fever (6.4%), hematuria (12.8%) and urinary leakage (5.1%). Conclusion: UM-PCNL is a safe and effective procedure for managing pediatric nephrolithiasis, offering high stone-free rates and low complication risks. The use of smaller instruments reduces renal trauma, bleeding and the need for blood transfusions. These findings support UM-PCNL as a first-line treatment option for larger renal stones in pediatric patients. Further studies with long-term follow-up are recommended to assess recurrence and long-term renal function outcomes.

Impacts of clinical backgrounds and intervention strategies on duration of intravenous antibiotics treatments in patients diagnosed with calculous pyelonephritis: a single-center retrospective study.

There are limited information that need to do appropriate treatment including duration of antibiotic treatments, timing of urinary drainage and pathogenesis of bacteria in calculous pyelonephritis. In the present study, we investigated real-world data on clinical features and succeeded treatment strategies in calculous pyelonephritis cases in our hospital, then, aimed to make predictive model estimating duration of intravenous antibiotics treatment. Participants were 163 consecutive patients diagnosed with calculous pyelonephritis who underwent antibiotics treatments between 2017 and 2023 in our in-patients' clinic. Candidates for explanatory variables that may affect duration of antibiotic treatments were age, gender, body mass index, stone location, stone size, septic status, blood culture, urine drainage, indwelling urethral catheter, diabetes mellitus and steroid intake. Duration of intravenous antibiotics treatment was 6 days in median (IQR: 4-8 days). Indwelling DJ stent or percutaneous nephrostomy were undergone in 74 (45.4%) patients. Multiple regression analysis revealed that gender, age, indwelling urethral catheter, septic status and management of urine drainage independently affected essential duration of intravenous antibiotics treatment and regression coefficient estimates of those factors respectively were 0.998, 0.890, 2.487, 1.462, 1.293 with constant of 2.464. Our preliminary multiple regression models for predicting duration of intravenous antibiotics treatment may be useful to judge the timing of changing treatment strategies for patients who would not improve at around estimated intravenous antibiotics treatment periods. If vital signs were stable, it may be acceptable to judge urine drainage from above the urinary stone at around two days after intravenous antibiotic treatments.

Novel scoring system for predicting stone-free rate after flexible ureteroscopy lithotripsy.

This study aims to investigate the factors affecting the stone-free rate (SFR) of flexible ureteroscopy and laser lithotripsy (fURSL) for renal stones and establish predictive models by identifying their prognostic factors. We retrospectively examined 252 patients with renal stones who were treated with fURSL between July 2020 and April 2022. We analyzed the relationship between the patient's clinical data (sex, age, and body mass index), stone status (side, size, location, stone/transverse process pixel ratio [STPR], and the CT value of stone [SCTV]), and SFR to determine the relevant factors and analyze their influence. Additionally, a nomogram was constructed based on these prediction results. A total of 252 patients were enrolled based on the inclusion and exclusion criteria. They were reviewed 7, 30, and 90 days postoperatively, with 46, 23, and 10 patients failing to discharge stones, respectively. Univariate Cox proportional hazard regression results revealed that the SFR was correlated with stone location, diameter (D1, diameter of stone measured by computed tomography [CT]; D2, diameter of stone measured by kidney-ureter-bladder abdominal radiography), SCTV, STPR, and operation time. Multivariate Cox proportional hazard regression was used to develop 2 predictive models for the SFR. The influencing factors of model 1 included D1, location, and SCTV, whereas those of model 2 were D2, location, and STPR. The results are shown in the nomogram. Receiver operating characteristic curves showed no significant difference between models 1 and 2 (P = .498), indicating that the nomogram was highly predictive. After 1000 resamples and internal self-validation, the C-indices of models 1 and 2 were 0.924 and 0.895, respectively, showing that the stone clearance predicted by the nomogram matched the actual situation. Stone location, size, and density (SCTV and STPR) were significant predictors of SFR after fURSL. The scoring system based on these factors may be used to guide optimal treatment strategy selection.

Comparison of the efficacy and safety of basket catheters and balloon catheters for endoscopic pancreatic duct stone clearance

BackgroundThe choice of a basket or a balloon catheter during endoscopic retrograde cholangiopancreatography (ERCP) for the clearance of pancreatic duct stones in patients with chronic pancreatitis (CP) remains controversial. This study compared the efficacy and safety of these two devices for pancreatic duct stone extractions. MethodsWe compared the efficacy and safety of basket and balloon catheters for pancreatic stone extractions. We enrolled CP patients who underwent ERCP for the first time at Changhai Hospital, Naval Medical University between February 2012 and December 2021. After propensity score matching (1:1), 101 patients were included in each group. The primary outcome was the rate of pancreatic stone clearance. Secondary outcomes included the rate of adverse events during hospitalization, long-term pain relief, and quality of life after one year follow-up period. ResultsThe rate of complete clearance was comparable between the two groups (86.1% vs. 84.2%, P = 0.692). In patients with stones ≥ 2 cm before extracorporeal shock wave lithotripsy (ESWL), the rate of complete clearance was significantly higher in the balloon catheter group when compared to the basket catheter group [100% (19/19) vs. 70.0% (14/20), P = 0.031]. In the multivariate analysis, ESWL prior to stone extraction was the only independent predictor of complete clearance [with ESWL 58.4% (264/452) vs. without 41.6% (188/452), OR = 2.3, 95% confidence interval: 1.2-4.3; P = 0.013]. No significant differences between groups were found regarding the rates of adverse events during hospitalization, quality of life, and pain relief after one year of follow-up. ConclusionsBasket and balloon catheters showed similar efficacy and safety for pancreatic stone extractions. However, the balloon catheter was superior to the basket catheter if the pancreatic stone size was ≥ 2 cm before ESWL.

The efficacy and safety of three different single-use ureteroscopes in retrograde intrarenal surgery: a comparative analysis of a single surgeon's experience in a single center.

To evaluate and compare the clinical results of different single-use flexible ureteroscopes (su-fURS) used in retrograde intrarenal surgery (RIRS). RIRS cases performed identically by an experienced surgeon between 2022 and 2023 in a single center were retrospectively analyzed. These surgeries were performed with three su-fURS (Redpine RP-U-C12, Hugemed HU30, and Pusen Uscope 3022A). In the study, the age, gender, body mass index, and Charlson comorbidity index of the patients were compared, along with their clinical details, such as the stone size, volume, density, location, and history of hydronephrosis or a double J stent or SWL. Operation time, stone-free rates (SFR), perioperative and postoperative complications, and hospitalization times were also compared. The study included 208 patients. Pusen had 63 cases, Hugemed had 62, and Redpine had 83. The comparison of the patient's demographic and clinical properties with stone-related variables was similar between the groups. The SFR was similar between the groups (p = 0.056). Perioperative, postoperative, and total complication rates and the need for a second intervention showed no significant differences among the three groups (p = 0.324, 0.088, 0.061, and 0.052, respectively). In the first study comparing the clinical results of cases in which different su-fURS were used, no difference was observed in surgical outcomes and complications, even though the technical features of these devices were different. Urologists should select su-fURS based on clinical requirements, financial constraints, and personal experiences.

The safety and efficacy of miniaturized percutaneous nephrolithotomy in children.

To assess the use of miniaturized percutaneous nephrolithotomy (mini-PCNL) for renal stones in children, as well as its safety and efficacy. Seventy-seven patients with more than 15mm renal stones whose age was less than 15 years were enrolled in this prospective case-controlled study at Al-Ramadi Teaching Hospital, Ar Razi Private Hospital, and Ghazi Al-Hariri Hospital for Surgical Specialties,Anbar and Baghdad, Iraq. The study was conducted from January 2020 to January 2024. The group mentioned above served as group A, and it was compared to the control group (group B), which consisted of 70 adult patients aged 18-60 years. Patients in both groups underwent mini-PCNL. Gender, stone size and location, time of operation, stone-free rate, hemoglobin drop, need for blood transfusion, postoperative fever, associated visceral injury, and need for further interventions such as extracorporeal shock wave lithotripsy or flexible ureteroscopy (ESWL or FURS) were compared in both groups. The age of patients in group A ranged from 8 months to 15 years with a mean (4.30 ± 3.16), while in group B ranged from 18 to 60 years with a mean (36.3 ± 12.0), p-value 0.001. There were no statistically significant differences regarding gender distribution, stone size, and location, p-value > 0.05. The stone-free rate was 87.01% for group A and 88.57% for group B, with no statistical difference, p-value 0.773. Hemoglobin drop was 1.096 ± 0.412 for group A and 1.195 ± 0.110 for group B, p-value 0.046. Blood transfusion was needed in one case in each group with no statistical difference, p-value 0.946. The need for ESWL was 3 cases in group A, and 2 cases in group B, with no statistical difference between the two groups, p-value 0.729. The need for FURS was 4 cases in group A and 3 cases in group B, p-value 0.796. Operative time was 30 to 125min in group A and 34 to 129min in group B, p-value 0.941. Postoperative fever was seen in 23 cases in group A and 21 cases in group B, p-value 0.986. Minor liver injury was seen was seen in one case in each group. The use of mini-PCNL for treating renal stones in children is safe and effective as it is associated with a relatively low rate of significant complications and achieves a high stone-free rate.

Clinical Significance of Perinephric Fluid Collection in Patients with Renal Colic and Urolithiasis: A Retrospective Analysis

Background: Perinephric fluid is commonly identified in patients with renal colic and urolithiasis, especially in cases associated with hydronephrosis. However, its clinical relevance, particularly its impact on treatment decisions and prognosis, is not well established. Methods: This retrospective, single-center study included adult patients who presented to the emergency department (ED) with suspected renal colic between January 2021 and October 2023. Patients underwent ultrasound evaluations, which were analyzed for perinephric fluid, hydronephrosis, stone size, and stone location. Data on patient demographics, laboratory results, and clinical outcomes, including the need for urological interventions, were also collected and analyzed. Multivariate logistic regression was used to assess factors associated with perinephric fluid presence. Results: Of the 509 patients included, 200 (39.3%) had perinephric fluid. Hydronephrosis was significantly associated with perinephric fluid (OR: 4.14, p = 0.007), as were stones located in the proximal (OR: 3.06, p = 0.003) and distal ureter (OR: 2.31, p = 0.018). However, sonographic perinephric fluid did not significantly affect the likelihood of urological intervention, in-hospital complications, sepsis, acute kidney injury (AKI), acute kidney disease (AKD), and prolonged hospital stay. Conclusions: Perinephric fluid is a common finding in patients with renal colic and urolithiasis, particularly in cases involving hydronephrosis and ureteral stones. However, despite its prevalence, sonographic perinephric fluid was not significantly associated with the need for urological intervention, longer hospital stays, or worse clinical outcomes. Further prospective studies are required to clarify its clinical implications fully.

Safety of flexible ureteroscopic lithotripsy with 365μm fibers of Ho: YAG laser: a short-term follow-up.

Our previous study first reported the efficacy of FURL using 365μm fibers with holmium: yttrium aluminum garnet (Ho: YAG) laser lithotripsy. This study evaluates the 16-week safety of this procedure. A prospective cohort study was conducted, and the clinical characteristics of patients who underwent FURL using 365μm fibers with Ho: YAG laser were retrospectively collected. Descriptive statistics were reported, and logistic regression analysis was conducted to identify risk factors influencing the stone-free rate (SFR). Infection-related laboratory parameters, including white blood cell count (WBC), procalcitonin (PCT), and C-reactive protein (CRP), were collected. Regression analysis was conducted to identify risk factors for the development of urosepsis post-surgery. Additionally, a 16-week follow-up was conducted in outpatient clinics, and kidney function was assessed. A total of 274 patients participated in this study. The 4-week stone-free rate (SFR) following FURL with 365μm fibers of Ho: YAG laser was significantly associated with stone size and composition. No severe complications were observed following FURL procedures. There were no significant differences in white blood cell count (WBC), C-reactive protein (CRP), and procalcitonin (PCT) in peripheral blood before and after FURL procedures. Urosepsis was diagnosed in 1.82% of patients. Preoperative white blood cell count (WBC) in urine and preoperative urine culture results were identified as significant risk factors. Kidney function remained stable at 4 and 16 weeks following FURL. This prospective cohort study demonstrated the high safety of FURL with 365μm fibers of Ho: YAG laser, as infection-related parameters during the perioperative period showed no significant differences, and kidney function remained stable throughout the 16-week follow-up.

Factors affecting radiation exposure in patients undergoing endoscopic treatment for urolithiasis.

Imaging techniques, such as computed tomography (CT) and fluoroscopy, are essential for the diagnosis and treatment of urolithiasis. There is increasing concern regarding the cumulative radiation dose associated with medical imaging and its adverse effects. This study aimed to assess radiation exposure in patients undergoing endoscopic management of urolithiasis and to identify factors associated with increased exposure.A retrospective analysis of all consecutive symptomatic urolithiasis cases who underwent endoscopic surgery over a two-year period at a tertiary referral center was performed. The cumulative radiation dose was recorded per stone episode, and the effective dose (ED) then calculated. Multivariable regression analysis was performed to determine the association between ED and patient, stone, and procedural characteristics.Between January 2020 and December 2021, 250 patients underwent endoscopic intervention for urolithiasis; 71% (n = 178) were male with a median age of 48 years (IQR 35-59). The median stone size was 6mm (IQR, 5-8mm) and the median stone volume was 110 mm3 (IQR, 60-206 mm3). Most stones were located in the distal ureter (46%, n = 114). The median ED received per stone episode was 3.99 mSv (IQR 2.9-7 mSv). On multivariable analysis, BMI, number of CT scans performed, CT protocol used, and repeat procedures strongly predicted increased radiation dose (p < 0.01).It is important for urologists to consider the cumulative radiation dosage in patients with urolithiasis. Strategies to minimize exposure, such as avoiding re-imaging, low-dose CTs, and collimation of the region of interest with judicious magnification, should be considered during treatment.

Evaluating the role of urine chemistry in shock wave lithotripsy outcomes.

Extracorporeal Shock Wave Lithotripsy (ESWL) is a commonly used method for the noninvasive treatment of kidney stones. However, achieving optimal treatment outcomes and minimizing potential damage to the kidney necessitates careful consideration for the total amount of energy utilized. This study aims to investigate whether urine pH and urine specific gravity have an impact on the total amount of energy applied during SWL. Between January 2023 and December 2023, 129 patients with renal stones underwent SWL in our department using the Storz Medical Modulith Inline lithotripter. Stone-free rates, complications, and the impact of patient, urine, and stone characteristics on energy use were analyzed. Urine samples were analyzed for pH and specific gravity. Stone characteristics, including size, HU, and skin-to-stone distance, were recorded. The obtained data were evaluated regarding the possible relationship between the total energy amount (determined as a risk factor) and the age, BMI, urine pH, urine specific gravity, stone size, HU, and skin-to-stone distance by using the Pearson correlation coefficient. p-value of < 0.05 was considered statistically significant. Evaluation of our findings revealed a negative linear relationship between total amount of energy used and the urine pH, indicating a decrease in the total energy amount as urine pH shifts towards alkaline values (p = 0.038; p < 0.05). However, no statistically significant relationship was observed between age, BMI, urine specific gravity, stone size, HU, and skin-to-stone distance and the total energy amount. Our findings demonstrated a significant relationship between urine pH and the total amount of energy applied during SWL sessions, suggesting the need for further prospective research to better understand the possible association between these two parameters. Such investigations could contribute to the development of more reasonable and effective strategies for kidney stone treatment in an attempt to minimize the potential kidney damage.

Comparative analysis of retro vs. transperitoneal laparoscopic pyelolithotomy for large renal stones.

The objective of this study is to compare the outcomes and complications of retroperitoneal and transperitoneal laparoscopic pyelolithotomy (RLP and TLP, respectively) in the treatment of large kidney stones. In this retrospective cohort effort, data of all patients who underwent laparoscopic pyelolithotomy for renal pelvic stone (N = 273) in three referral urology hospitals were retrieved. Operation duration, length of hospital stay, postoperative stone-free rate, hemoglobin (Hb) and creatinine (Cr) changes and complications were compared between the two groups before and after propensity score matching. A total of 199 TLP and 74 RLP cases were examined. Stone size was significantly higher in the TLP vs. RLP group (29.8 ± 10.9 vs. 26.5 ± 8.8mm; P = .022). Length of operation and hospital stay were comparable (P = .672 and P = .396, respectively). Rate of conversion to open surgery, postoperative blood transfusion rate, postoperative urinary leakage, postoperative stone-free rate, Hb drop and Cr change were similar between the two groups (P = .348, 0.190, 0.828, 0.411, 0.780 and 0.134, respectively). Postoperative fever was significantly more prevalent in TLP compared to RLP (21.6% vs. 0.0%, respectively; P < .001). Propensity score matched analyses showed similar results in all aspects; particularly demonstrating higher postoperative fever in TLP compared to RLP (18.9% vs. 0.0%, respectively; P < .001). RLP can be considered as an alternative to TLP; especially owing to a lower chance of postoperative fever.

Is double-J stent mandatory in complete supine percutaneous nephrolithotomy for adult patients with staghorn renal stones?

It is controversial whether double-J (DJ) stent insertion is necessary in tubeless percutaneous nephrolithotomy (PCNL) for patients with staghorn stones. We compared the outcomes of using ureteral catheters and double-J stents in tubeless complete supine PCNL (csPCNL) of staghorn stones. In this analytical cross-sectional study, from May 2008 to August 2022, 123 patients who underwent tubeless csPCNL were assessed. Patients were divided into two groups by either tubeless csPCNL with DJ stent (Group I; n = 23) or totally tubeless just with perioperative ureteral stent (Group II; n = 100). Demographic characteristics, stone-related factors, perioperative and postoperative parameters were compared in groups. Baseline characteristics were comparable in groups. The operative time in group I was significantly longer than group II (68.26 vs. 55.25min, P = 0.05). However, the duration of hospitalization in Group I was shorter than the other group (1.81 vs. 2.37 days, P = 0.03). Stone free rate was notably higher in Group I (90.5% vs. 79.8.0%) with no statistically significant difference. No significant differences were found in major complications. Patients in Group II had a significantly shorter time to return to normal life (6.48 vs. 7.91day; P = 0.043). Multivariable linear regression showed the preoperative creatinine level and stone size can affect the operative time (P = 0.02). In addition, stone number and underlying disease can affect the length of hospital stay (P = 0.007 & 0.030, respectively). Although not inserting a double J stent after csPCNL has acceptable results, because of higher residual rate in staghorn stone which cause more incidence of renal colic, longer time of hospital stay and return to normal life, inserting DJ stent is recommended.

Retroperitoneal vs transperitoneal laparoscopic pyelolithotomy; a single surgeon's experience.

To compare the outcomes of transperitoneal and retroperitoneal laparoscopic pyelolithotomy procedures. A total of 104 consecutive laparoscopic pyelolithotomy surgeries performed by a single surgeon on patients with staghorn or renal pelvic calculi larger than 20mm were evaluated. Intraoperative and postoperative clinical parameters from two groups, transperitoneal (TLPL) (N = 55) and retroperitoneal (RLPL) (N = 49), were compared. The surgeon performed TLPL for the first five years and then switched to the RLPL approach for the next five years. There were no significant differences in general demographic variables and stone size (26.55 vs. 24.73mm, P = 0.8). Operation time and change in serum creatinine levels did not significantly differ between the two approaches. However, patients who underwent TLPL had longer hospital stays than RLPL (3.23 ± 1.21 vs. 2.36 ± 1.10 days, P = 0.0001). Additionally, TLPL was associated with a greater drop in hemoglobin levels (1.53 ± 1.04 vs. 1.17 ± 0.68, P = 0.04), higher rates of postoperative fever (12.7% vs. 0.0%, P = 0.01). The retroperitoneal approach in laparoscopic pyelolithotomy for large renal pelvic stones resulted in fewer postoperative fevers, reduced hemoglobin drops, and shorter hospital stays than the transperitoneal approach. However, the stone-free rates were similar for both groups.

Analysis of postoperative infection factors of retrograde intrarenal surgery combined with negative pressure equipment for renal stones

Our study aimed to retrospectively analyze the patients who underwent the combination of negative pressure equipment and RIRS(NP-RIRS) for renal stones, and identified new high-risk factors related to infection. 456 patients with renal stones ≤ 3 cm underwent NP-RIRS in our department, from January 2022 to October 2023. All patients were divided into non-infection group(NIRIRS group) and infection group(IRIRS group) based on infection complications during the perioperative period. Establish a receiver operating characteristic curve(ROC curve)based on variables with statistical differences, and use the Jordan index to find the optimal cutoff value. Classify the data into two categories based on the best truncation value, and perform binary logistic regression analysis on the classified data. In the IRIRS group, there were 10 cases of fever (2.92%), 2 cases of sepsis (0.58%), and no cases of septic shock or death. The length and the CT value of the stone were 16 (13,21) vs. 22 (19,24) (p < 0.001), 764 (570,1012) vs. 1372 (841,1527) (p < 0.001), respectively, and there was a statistical difference. The surgical time of NIRIRS group and IRIRS group were 57 (50,65) vs. 75 (60,98), respectively (p < 0.001), with statistical differences. On the contrary, the stone-free rate(SFR) at 3 months after surgery was 97.60% vs. 91.70% (p = 0.209), and there was no difference. The length of stones, surgical time, and CT values of stones between the two groups were further used to establish ROC, with ROC areas of 0.791, 0.791, and 0.816, respectively(Fig. 2). Based on the Jordan index, the optimal cutoff values were 17.5 mm (stone size), 64.5 min (surgery time), and 732.5 HU (stone CT value), respectively. Three continuous variables were transformed into binary data using the best truncation criterion, and the classified results were subjected to binary logistic regression analysis. The results showed that the three variables remained independent risk factors for postoperative infection complications. The incidence of infection after NPRIRS was lower than TRIRS for kidney stones. Length of stones, surgical time, and CT value of stones were independent risk factors for postoperative infection in NPRIRS treatment of kidney stones. Due to the small sample size, the credibility and generalizability of the conclusions were limited.

Decision regret analysis in early URSL vs medical expulsive therapy 1 for ureteric calculi ≤ 1cm

BackgroundThe study assesses the decisional regret following Shared Decision-making (SDM) in patients selecting either early ureteroscopic lithotripsy (URSL) or medical expulsive therapy (MET) for ureteric stones ≤ 1 cm, with the aim to evaluate their decisional Conflict, satisfaction, and regret regarding their opted treatment choices.MethodsAdults aged more than 18 years with one stone up to 1 cm in either ureter were included. After SDM, the patients were allocated into their opted group viz. URSL or MET. Patients in each group were reassessed at “treatment completion”. Cambridge Ureteric Stone PROM (CUSP) questionnaire for HRQoL, Decision Regret Scale and the OPTION scale (SDM) were filled at treatment completion.Findings111 patients opted for MET, while 396 patients opted for early URSL. Mean stone size was larger in URSL group (7.16 ± 1.63 mm vs. 5.50 ± 1.89; p < 0.001). Decisional conflict was higher in patients opting for URSL (77.3% vs. 57.7%; p < 0.001). Stone-free rate at four weeks was higher in URSL group (87.1%vs68.5%, p < 0.001). Decisional regret was higher in patients opting for MET (33.24 ± 30.89 vs. 17.26 ± 12.92; p = 0.002). Anxiety, was higher in patients opting for MET (6.94 ± 1.89 vs. 5.85 ± 1.54; p < 0.001). Urinary symptoms and interference in patients’ travel plans and work-related activities were more in URSL group (6.21 ± 1.57 vs. 5.59 ± 1.46; p < 0.001 and 6.56 ± 1.59 vs. 6.05 ± 1.72; p < 0.001 respectively).InterpretationAfter SDM, decisional regret is higher in patients opting for MET mainly due protracted treatment duration with increased pain and anxiety during the treatment course and the need for additional procedure for attaining stone clearance and the. Despite higher decisional conflict, a larger proportion of patients opt for early URSL with the aim of avoiding anxiety and achieving early stone clearance.

Transoral approach for hilo-parenchymal submandibular stones: outcomes and predictors of success

ObjectiveTo evaluate the efficacy and safety of transoral surgical management for complex submandibular gland (SMG) stones. Study DesignA retrospective cohort study of 240 patients treated for sialolithiasis between 2015 and 2018, focusing on 57 cases of submandibular gland stones that underwent stone removal procedures. Treatment methods, success rates, and complications were analyzed using Kaplan-Meier analysis, Cox proportional hazards regression, and multiple logistic regression. ResultsTransoral surgical release was successful in 72.9% of cases. The overall complication rate was 10%. Stone size (HR = 0.85, p = 0.004) and hilar location (HR = 0.72, p = 0.036) were associated with longer symptom resolution time. Multivariate analysis revealed that stone size (OR = 0.78, p = 0.009) and hilar location (OR = 0.45, p = 0.029) decreased the odds of successful removal. ConclusionTransoral surgical management of hilo-parenchymal SMG stones appears to be a safe and effective approach, potentially reducing the need for sialoadenectomy.