{"title":"2024 Canadian Urological Association endorsement of an expert report: Kidney involvement in tuberous sclerosis complex","authors":"Ross J. Mason, Patrick O. Richard","doi":"10.5489/cuaj.8925","DOIUrl":"https://doi.org/10.5489/cuaj.8925","url":null,"abstract":"<jats:p>NA</jats:p>","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"134 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141810939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
INTRODUCTION: Previous studies have demonstrated the feasibility of bedside placement of ureteric stents; however, they have traditionally required two skilled operators and were associated with some stent malposition especially for proximal ureteric obstruction. We sought to investigate the efficacy and safety of a modified technique for ultrasound-assisted bedside ureteric stent insertion without the presence of a skilled assist. METHODS: A single institution prospective study was performed from April-August 2023. Indications for stenting included infection, renal insufficiency, or intractable colic. Exclusion criteria included age <18 years, hemodynamic instability, and patients with history of chronic pain. Point-of-care ultrasound (POCUS) was used to confirm wire placement in the kidney and presence of a hydronephrotic drip from a 5 French ureteric catheter was used to confirm placement beyond the level of obstruction. RESULTS: Of 28 patients, all patients underwent successful bedside ureteric stent placement. Mean age was 64.9 years and mean body mass index (BMI) was 33.2. Proximal ureter obstruction was present in 52% of patients and mid/distal obstruction in 48%. In cases with obstructing stones, the mean stone size was 8.1 mm with a range of 4–15 mm. Infection was the indication for stent placement in most patients (71%), followed by pain (4%) and acute kidney injury (AKI) (4%). All patients who underwent successful stent placement had presence of hydronephrotic drip from the ureteric catheter. CONCLUSIONS: Ultrasound-assisted bedside ureteric stent insertion without a skilled assist is a safe and feasible option for management of acute ureteral obstruction. Presence of hydronephrotic drip can indicate successful access beyond the level of obstruction as an alternative to POCUS.
{"title":"Safety and efficacy of ultrasound-assisted bedside ureteric stent placement","authors":"David Chung, Ryan Ramjiawan, Gregory Hosier","doi":"10.5489/cuaj.8880","DOIUrl":"https://doi.org/10.5489/cuaj.8880","url":null,"abstract":"INTRODUCTION: Previous studies have demonstrated the feasibility of bedside placement of ureteric stents; however, they have traditionally required two skilled operators and were associated with some stent malposition especially for proximal ureteric obstruction. We sought to investigate the efficacy and safety of a modified technique for ultrasound-assisted bedside ureteric stent insertion without the presence of a skilled assist.\u0000METHODS: A single institution prospective study was performed from April-August 2023. Indications for stenting included infection, renal insufficiency, or intractable colic. Exclusion criteria included age <18 years, hemodynamic instability, and patients with history of chronic pain. Point-of-care ultrasound (POCUS) was used to confirm wire placement in the kidney and presence of a hydronephrotic drip from a 5 French ureteric catheter was used to confirm placement beyond the level of obstruction.\u0000RESULTS: Of 28 patients, all patients underwent successful bedside ureteric stent placement. Mean age was 64.9 years and mean body mass index (BMI) was 33.2. Proximal ureter obstruction was present in 52% of patients and mid/distal obstruction in 48%. In cases with obstructing stones, the mean stone size was 8.1 mm with a range of 4–15 mm. Infection was the indication for stent placement in most patients (71%), followed by pain (4%) and acute kidney injury (AKI) (4%). All patients who underwent successful stent placement had presence of hydronephrotic drip from the ureteric catheter.\u0000CONCLUSIONS: Ultrasound-assisted bedside ureteric stent insertion without a skilled assist is a safe and feasible option for management of acute ureteral obstruction. Presence of hydronephrotic drip can indicate successful access beyond the level of obstruction as an alternative to POCUS.","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"59 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141810672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roseanne Ferreira, Dean Elterman, M. Rickard, Max Freeman, Natasha Brownrig, A. Varghese, M. Chua, A. Lorenzo, J. Dos Santos
INTRODUCTION: Refractory bladder and bowel dysfunction (BBD) significantly affects the health and quality of life of children and their caregivers, emphasizing the need for effective and minimally invasive treatments. This study aims to present the inaugural Canadian experience using sacral neuromodulation (SNM) as a therapeutic option for children with refractory BBD. METHODS: Patients <18 years old with refractory BBD were prospectively followed from 2018 to the present. Preoperative evaluation included spinal MRI and video urodynamics. Two-stage SNM implantation was executed with a minimum two-week stage 1 trial. Functional outcomes and complication rates were measured following validated questionnaires. RESULTS: Six patients completed staged implantation at a median age of 10.8 years (range 8.2–18). The median baseline Dysfunctional Voiding Scoring System (DVSS) score was 12.5 (10–22). At six months of followup, only one patient required adjunct bladder medication. Median DVSS at one-year followup was 5.5 (0–7). Symptomatic resolution was noted in three patients at six months, sustained over one year. Early surgical complications were reported in one (infection) and late complications in three (lead fracture, battery depletion, non-traumatic malfunction), requiring reimplantation at a median of 37.5 (1–49) months. Post-SNM reimplantation, oral medication and rectal therapy decreased, and DVSS scores improved by 30% (0–63.6) at six months. CONCLUSIONS: SNM is feasible and offers promising results for refractory pediatric BBD in Canada. The significant improvement of symptoms highlights the treatment’s potential, which must be balanced against the high need for revision detected at three years, possibly related to patients’ growth and high activity level.
{"title":"Sacral neuromodulation in pediatric refractory bladder and bowel dysfunction","authors":"Roseanne Ferreira, Dean Elterman, M. Rickard, Max Freeman, Natasha Brownrig, A. Varghese, M. Chua, A. Lorenzo, J. Dos Santos","doi":"10.5489/cuaj.8881","DOIUrl":"https://doi.org/10.5489/cuaj.8881","url":null,"abstract":"INTRODUCTION: Refractory bladder and bowel dysfunction (BBD) significantly affects the health and quality of life of children and their caregivers, emphasizing the need for effective and minimally invasive treatments. This study aims to present the inaugural Canadian experience using sacral neuromodulation (SNM) as a therapeutic option for children with refractory BBD.\u0000METHODS: Patients <18 years old with refractory BBD were prospectively followed from 2018 to the present. Preoperative evaluation included spinal MRI and video urodynamics. Two-stage SNM implantation was executed with a minimum two-week stage 1 trial. Functional outcomes and complication rates were measured following validated questionnaires.\u0000RESULTS: Six patients completed staged implantation at a median age of 10.8 years (range 8.2–18). The median baseline Dysfunctional Voiding Scoring System (DVSS) score was 12.5 (10–22). At six months of followup, only one patient required adjunct bladder medication. Median DVSS at one-year followup was 5.5 (0–7). Symptomatic resolution was noted in three patients at six months, sustained over one year. Early surgical complications were reported in one (infection) and late complications in three (lead fracture, battery depletion, non-traumatic malfunction), requiring reimplantation at a median of 37.5 (1–49) months. Post-SNM reimplantation, oral medication and rectal therapy decreased, and DVSS scores improved by 30% (0–63.6) at six months.\u0000CONCLUSIONS: SNM is feasible and offers promising results for refractory pediatric BBD in Canada. The significant improvement of symptoms highlights the treatment’s potential, which must be balanced against the high need for revision detected at three years, possibly related to patients’ growth and high activity level.","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"135 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141811073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fostering the continued growth of our association","authors":"Ricardo A. Rendon","doi":"10.5489/cuaj.8938","DOIUrl":"https://doi.org/10.5489/cuaj.8938","url":null,"abstract":"","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"133 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141811572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PGY2040: Beyond the digital hum","authors":"Ioana Fugaru","doi":"10.5489/cuaj.8889","DOIUrl":"https://doi.org/10.5489/cuaj.8889","url":null,"abstract":"","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"5 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141813941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Papadopoulos, Andy Kin On Wong, Sharon Hiu Ching Law, L. Zhang, H. Breunis, U. Emmenegger, S. Alibhai
Introduction: Sarcopenia is a predictor of clinical outcomes in men with metastatic castrate-resistant prostate cancer (mCRPC); however, correlates and predictors of sarcopenia are poorly understood in this population. The aim of this study was to examine correlates and predictors of sarcopenia in men with mCRPC prior to treatment. Methods: A secondary analysis of an observational study was performed. Participants were receiving care for mCRPC at the Princess Margaret Cancer Centre. Sarcopenia was assessed prior to treatment and was defined as the combination of low grip strength (<35.5 kg), low gait speed (<0.8 m/s), and computed tomography-derived low muscle mass or density. Participants’ sociodemographic and clinical characteristics, comorbidity information, and clinically relevant blood markers were collected prior to treatment and were used to identify correlates and predictors of sarcopenia through Spearman correlations and multivariable logistic regression, respectively. Results: In total, 110 men had complete data on sarcopenia measures and were included in the analysis. Sarcopenia was identified in 30 (27.3%) participants. Pre-treatment sarcopenia was moderately correlated with dependence in one or more instrumental activities of daily living (IADLs) (r=0.412), Vulnerable Elders Survey-13 (r=0.404), and a lower hemoglobin (r=0.407 per 10 g/L decrease). In adjusted logistic regression, dependence in one or more IADLs (odds ratio [OR] 4.37, 95% confidence interval [CI] 1.37–13.86, p=0.012), and a 10 g/L decrease in hemoglobin (OR 1.70, 95% CI 1.13–2.57, p=0.012) were significantly associated with sarcopenia. Conclusions: In settings where assessment of sarcopenia is not feasible, evaluation of IADLs and hemoglobin may be used to identify high-risk patients that can benefit from supportive care strategies aiming to improve muscle mass and function.
{"title":"Correlates and predictors of sarcopenia among men with metastatic castrate-resistant prostate cancer","authors":"E. Papadopoulos, Andy Kin On Wong, Sharon Hiu Ching Law, L. Zhang, H. Breunis, U. Emmenegger, S. Alibhai","doi":"10.5489/cuaj.8803","DOIUrl":"https://doi.org/10.5489/cuaj.8803","url":null,"abstract":"Introduction: Sarcopenia is a predictor of clinical outcomes in men with metastatic castrate-resistant prostate cancer (mCRPC); however, correlates and predictors of sarcopenia are poorly understood in this population. The aim of this study was to examine correlates and predictors of sarcopenia in men with mCRPC prior to treatment.\u0000Methods: A secondary analysis of an observational study was performed. Participants were receiving care for mCRPC at the Princess Margaret Cancer Centre. Sarcopenia was assessed prior to treatment and was defined as the combination of low grip strength (<35.5 kg), low gait speed (<0.8 m/s), and computed tomography-derived low muscle mass or density. Participants’ sociodemographic and clinical characteristics, comorbidity information, and clinically relevant blood markers were collected prior to treatment and were used to identify correlates and predictors of sarcopenia through Spearman correlations and multivariable logistic regression, respectively.\u0000Results: In total, 110 men had complete data on sarcopenia measures and were included in the analysis. Sarcopenia was identified in 30 (27.3%) participants. Pre-treatment sarcopenia was moderately correlated with dependence in one or more instrumental activities of daily living (IADLs) (r=0.412), Vulnerable Elders Survey-13 (r=0.404), and a lower hemoglobin (r=0.407 per 10 g/L decrease). In adjusted logistic regression, dependence in one or more IADLs (odds ratio [OR] 4.37, 95% confidence interval [CI] 1.37–13.86, p=0.012), and a 10 g/L decrease in hemoglobin (OR 1.70, 95% CI 1.13–2.57, p=0.012) were significantly associated with sarcopenia.\u0000Conclusions: In settings where assessment of sarcopenia is not feasible, evaluation of IADLs and hemoglobin may be used to identify high-risk patients that can benefit from supportive care strategies aiming to improve muscle mass and function.","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"51 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141644704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jainik Shah, M. Fidel, Dhiraj S. Bal, A. Kharazi, Connor Roque, Yool Ko, K. Sidhom, David Bouhadana, Francis Petrella, Premal Patel
Introduction: Restorative therapies (RT(s)), including low-intensity shockwave therapy (Li-SWT) and platelet-rich plasma (PRP), aim to restore natural erectile function. Many clinics offer these therapies for erectile dysfunction (ED) and Peyronie’s disease (PD) with direct-to-consumer (DTC) marketing. This study sought to investigate the landscape of RTs within Canadian clinics. Methods: Online searches were made to identify clinics offering Li-SWT and/or PRP as an RT for treating ED and PD in Canada. Public websites were analyzed, followed by calling clinics for data on cost, treatment protocols, clinic ownership, success rates, and adjunctive therapies. Results: A total of 107 clinics were identified online, with a 68.2% call response rate (n=73). Of the respondents, 56 and 40 clinics provided Li-SWT and PRP therapies, respectively, with 23 clinics offering both. All clinics reported using RTs for ED, with 21 clinics offering Li-SWT and 22 clinics providing PRP for PD. Forty-three clinics provided costs and protocols for Li-SWT, while 33 clinics did so for PRP. The average cost + standard deviation (CAD) of six sessions of Li-SWT was $2167.24+936.11 and one shot of PRP was $1478.68+591.98. Most (60.3%, n=44) clinics reported physician ownership, with a majority (n=28) being family medicine trained. Seven clinics did not provide data and 22 were non-MD-owned. Ten clinics provided success rates, with an average of 87.3%. Conclusions: Despite limited data supporting their routine clinical use, many clinics across Canada offer RTs for ED and PD with varying treatment protocols and increased costs. Further research is required to evaluate the efficacy of RT for ED and PD.
{"title":"An overview of the Canadian landscape on the use of restorative therapies for erectile dysfunction and Peyronie’s disease","authors":"Jainik Shah, M. Fidel, Dhiraj S. Bal, A. Kharazi, Connor Roque, Yool Ko, K. Sidhom, David Bouhadana, Francis Petrella, Premal Patel","doi":"10.5489/cuaj.8804","DOIUrl":"https://doi.org/10.5489/cuaj.8804","url":null,"abstract":"Introduction: Restorative therapies (RT(s)), including low-intensity shockwave therapy (Li-SWT) and platelet-rich plasma (PRP), aim to restore natural erectile function. Many clinics offer these therapies for erectile dysfunction (ED) and Peyronie’s disease (PD) with direct-to-consumer (DTC) marketing. This study sought to investigate the landscape of RTs within Canadian clinics.\u0000Methods: Online searches were made to identify clinics offering Li-SWT and/or PRP as an RT for treating ED and PD in Canada. Public websites were analyzed, followed by calling clinics for data on cost, treatment protocols, clinic ownership, success rates, and adjunctive therapies.\u0000Results: A total of 107 clinics were identified online, with a 68.2% call response rate (n=73). Of the respondents, 56 and 40 clinics provided Li-SWT and PRP therapies, respectively, with 23 clinics offering both. All clinics reported using RTs for ED, with 21 clinics offering Li-SWT and 22 clinics providing PRP for PD. Forty-three clinics provided costs and protocols for Li-SWT, while 33 clinics did so for PRP. The average cost + standard deviation (CAD) of six sessions of Li-SWT was $2167.24+936.11 and one shot of PRP was $1478.68+591.98. Most (60.3%, n=44) clinics reported physician ownership, with a majority (n=28) being family medicine trained. Seven clinics did not provide data and 22 were non-MD-owned. Ten clinics provided success rates, with an average of 87.3%.\u0000Conclusions: Despite limited data supporting their routine clinical use, many clinics across Canada offer RTs for ED and PD with varying treatment protocols and increased costs. Further research is required to evaluate the efficacy of RT for ED and PD.","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"54 31","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141644500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nicholas S. Dean, Patrick Albers, A. Senthilselvan, Alexandra Bain, Matthew Mancuso, Ryan Mclarty, Trevor Schuler, T. Wollin, Shubha K. De
Introduction: We sought to identify predictors of failed retrograde ureteric stent (FRS) placement in the setting of obstructing ureteric calculi. In addition to patient- and stone-specific characteristics, we also considered computed tomography (CT) measures of ureteric wall thickness (UWT), as it has shown clinical potential in predicting outcomes of shockwave lithotripsy, ureteroscopy, and spontaneous stone passage. Methods: We performed a retrospective, case-control study comparing patients who had successful retrograde stent (SRS) insertions with those who failed stent placement and ultimately required nephrostomy tube (NT) insertion (2013–2019). Patients were identified using administrative data from a shared electronic medical record (capturing all urology patients in our geographic area) and a prospective database capturing all institutional interventional radiology procedures. Patient demographics, as well as clinical and stone characteristics were then collected, and imaging manually reviewed. Statistical analysis was performed using univariate and multivariate logistic regression analysis in collaboration with a statistician. Results: A total of 109 patients met inclusion for analysis (34 FRS, 75 SRS). The most common indication for stent insertion included sepsis (79%). On multivariate analysis both acute kidney injury as primary indication for stent insertion (odds ratio [OR] 9.16, 95% confidence interval [CI] 1.91–44.00, p=0.006) and UWT (OR 0.34, 95% CI 0.15–0.74, p=0.007) were found to be significantly associated with failed retrograde stent placement. A receiver operator characteristic curve analysis demonstrates an optimal UWT cutoff of 3.2 mm (sensitivity 60.6%, specificity 83.3%). Conclusions: Elevated UWT and acute kidney injury as an indication for urgent urinary decompression in the setting of obstructing ureteric stones are predictive of failed retrograde stent placement. These patients may benefit from upfront nephrostomy tube insertion.
{"title":"Ureteric wall thickness as a novel predictor for failed retrograde ureteric stent placement","authors":"Nicholas S. Dean, Patrick Albers, A. Senthilselvan, Alexandra Bain, Matthew Mancuso, Ryan Mclarty, Trevor Schuler, T. Wollin, Shubha K. De","doi":"10.5489/cuaj.8845","DOIUrl":"https://doi.org/10.5489/cuaj.8845","url":null,"abstract":"Introduction: We sought to identify predictors of failed retrograde ureteric stent (FRS) placement in the setting of obstructing ureteric calculi. In addition to patient- and stone-specific characteristics, we also considered computed tomography (CT) measures of ureteric wall thickness (UWT), as it has shown clinical potential in predicting outcomes of shockwave lithotripsy, ureteroscopy, and spontaneous stone passage.\u0000Methods: We performed a retrospective, case-control study comparing patients who had successful retrograde stent (SRS) insertions with those who failed stent placement and ultimately required nephrostomy tube (NT) insertion (2013–2019). Patients were identified using administrative data from a shared electronic medical record (capturing all urology patients in our geographic area) and a prospective database capturing all institutional interventional radiology procedures. Patient demographics, as well as clinical and stone characteristics were then collected, and imaging manually reviewed. Statistical analysis was performed using univariate and multivariate logistic regression analysis in collaboration with a statistician.\u0000Results: A total of 109 patients met inclusion for analysis (34 FRS, 75 SRS). The most common indication for stent insertion included sepsis (79%). On multivariate analysis both acute kidney injury as primary indication for stent insertion (odds ratio [OR] 9.16, 95% confidence interval [CI] 1.91–44.00, p=0.006) and UWT (OR 0.34, 95% CI 0.15–0.74, p=0.007) were found to be significantly associated with failed retrograde stent placement. A receiver operator characteristic curve analysis demonstrates an optimal UWT cutoff of 3.2 mm (sensitivity 60.6%, specificity 83.3%).\u0000Conclusions: Elevated UWT and acute kidney injury as an indication for urgent urinary decompression in the setting of obstructing ureteric stones are predictive of failed retrograde stent placement. These patients may benefit from upfront nephrostomy tube insertion.","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"28 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ryan Boudreau, Moustafa Fathy, Amr Hodhod, Rabail Siddiqui, Husain Alaradi, Saud Alhelal, Loay Abbas, Amer Alaref, A. Zakaria, H. Elmansy
Introduction: We aimed to investigate the factors impacting stone clearance following retrograde intrarenal surgery (RIRS) for lower pole kidney stones and to determine whether there is a significant relationship between the infundibular pelvic angle (IPA) of the kidney's lower pole and stone fragment clearance. Methods: We retrospectively reviewed patients who underwent flexible ureteroscopy (f-URS) for lower pole renal calculi between December 2020 and July 2023 at our institution. Patient demographics and stone parameters were recorded, including stone size, number, volume, density, and IPA. Intraoperative data, including total operative time, lasing time, type of laser used, and stone composition, were collected and analyzed. All patients underwent a computed tomography (CT) scan at three months followup. We recorded the presence of residual stones and the percentage of stone volume reduction. Patients with a stone size 3 mm were deemed stone-free. All patients were discharged home on the same operative day. Results: A total of 123 patients were included in the study: 71 in the stone-free group (group 1) and 52 in the residual stones group (group 2). On univariate analysis, there were significant differences between the two groups in terms of stone size, IPA, and the type of ureteroscopy used. At three months followup, 96% (24/25) of patients with an IPA <30° had residual stones, compared to 28.6% (28/98) of patients with an IPA >30° (p<0.001). There was no significant difference in the intraoperative or postoperative complications between the two groups. On multivariate analysis, IPA and stone size were the only predictive factors for the presence of residual stones. Twelve patients (23.1%) from group 2 required retreatment. Conclusions: RIRS is an effective treatment option for the management of lower pole kidney stones. IPA, in conjunction with stone size, appears to dictate the stone clearance rates of RIRS for lower pole stones.
{"title":"Factors predicting stone-free rates after retrograde intrarenal surgery for lower pole kidney stones","authors":"Ryan Boudreau, Moustafa Fathy, Amr Hodhod, Rabail Siddiqui, Husain Alaradi, Saud Alhelal, Loay Abbas, Amer Alaref, A. Zakaria, H. Elmansy","doi":"10.5489/cuaj.8807","DOIUrl":"https://doi.org/10.5489/cuaj.8807","url":null,"abstract":"Introduction: We aimed to investigate the factors impacting stone clearance following retrograde intrarenal surgery (RIRS) for lower pole kidney stones and to determine whether there is a significant relationship between the infundibular pelvic angle (IPA) of the kidney's lower pole and stone fragment clearance.\u0000Methods: We retrospectively reviewed patients who underwent flexible ureteroscopy (f-URS) for lower pole renal calculi between December 2020 and July 2023 at our institution. Patient demographics and stone parameters were recorded, including stone size, number, volume, density, and IPA. Intraoperative data, including total operative time, lasing time, type of laser used, and stone composition, were collected and analyzed. All patients underwent a computed tomography (CT) scan at three months followup. We recorded the presence of residual stones and the percentage of stone volume reduction. Patients with a stone size 3 mm were deemed stone-free. All patients were discharged home on the same operative day.\u0000Results: A total of 123 patients were included in the study: 71 in the stone-free group (group 1) and 52 in the residual stones group (group 2). On univariate analysis, there were significant differences between the two groups in terms of stone size, IPA, and the type of ureteroscopy used. At three months followup, 96% (24/25) of patients with an IPA <30° had residual stones, compared to 28.6% (28/98) of patients with an IPA >30° (p<0.001). There was no significant difference in the intraoperative or postoperative complications between the two groups. On multivariate analysis, IPA and stone size were the only predictive factors for the presence of residual stones. Twelve patients (23.1%) from group 2 required retreatment.\u0000Conclusions: RIRS is an effective treatment option for the management of lower pole kidney stones. IPA, in conjunction with stone size, appears to dictate the stone clearance rates of RIRS for lower pole stones.","PeriodicalId":38001,"journal":{"name":"Canadian Urological Association Journal","volume":"33 31","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141645443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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