Background: The aim of the study is the compare efficacy and safety of percutaneous nephrolithotomy in supine and prone positions. Percutaneous nephrolithotomy is conventionally performed in prone position but in recent years numbers of supine percutaneous nephrolithotomies is increasing globally.Methods: The hospital based cross-sectional observational study was conducted in the Department of Urology, Bir Hospital from July 2018 to January 2020. A total of 81 consecutive patients undergoing percutaneous nephrolithotomy were divided into two groups, with 38 patients in Supine (Group 1) and 43 patients in Prone (Group 2) positions, respectively. Patient’s demographics, access time, operative duration, stone free rate, radiation dose and duration, irrigation fluid volume, post-operative hemoglobin drop and complications were compared.Results: Demographic and stone characteristics were comparable in both groups. Supine Group (Group 1) had significantly shorter operative duration than Prone Group (Group 2), 44.63 ± 12.44minsvs 53.02 ±12.67mins (p< 0.04). The mean radiation duration was 99.11 ± 61.17secs in Group 1 and 108.40 ± 51.65 secs in Group 2 (p=0.46), respectively. Although the mean radiation dose was lower in Group 1 (375.1µGym2) than in Group 2 (465.7 µGym2), it was not statistically significant(p=0.24). The stone free rate at 1 month duration were comparable with 92.1% and 93.02% in Group 1 and Group 2 respectively (p=0.16). Overall complication rates were similar in both groups (15.7% in Group 1 vs 16.2% in Group 2), respectively. None of the patients in both groups had complications higher than Clavien IIIa.Conclusions: PCNL in supine position has significantly shorter operative time with similar complications and stone free rates as compared to prone position.Keywords: percutaneous nephrolithotomy; prone position; supine position

Introduction: Percutaneous nephrolithotomy has the highest stone free rate among other procedures with relatively higher complication rate. Post-operative imaging after stone surgeries has not been uniform. This study was done to study about the stone clearance by computed tomography after percutaneous nephrolithotomy. Methods: The descriptive cross-sectional study was conducted in the Department of Urology, Bir Hospital for six months duration. The patients undergoing percutaneous nephrolithotomy and those with intra-operative fluoroscopic clearance were evaluated with a low dose computed tomography after 48 hours to assess residual fragments its size and location. Patient’s demographics, stone characteristics and complications were compared between the stone free and with residual stone patients. Results: Out of 72 percutaneous nephrolithotomy performed, 40 patients were included in the study. Low dose computed tomography kidney, ureter and bladder after 48 hours of surgery detected residual fragments in 11 (27.5%) patients. The RFs size of <4mm were found in 7 (63.63%) of cases whereas RFs of >4mm were found in 4 (36.36%). The stone size was 352.47 ± 97.47 mm2 and 254.79 ± 172.68mm2 in group with residual fragments and stone free group respectively. Conclusions: Low dose computed tomography kidney, ureter and bladder done for assessment of stone clearance after 48 hours of percutaneous nephrolithomy detected residual in around one fourth of patients, however majority of them had residual fragments <4mm. Intra-operative fluoroscopic clearance may over estimate stone clearance after percutaneous nephrolithomy as about one third of patients still may have residual fragments of >4mm size.

No abstract

Background: Benign prostatic hyperplasia is associated with structural and morphological changes including elongation of prostatic urethral length. The aim of our study was to assess whether prostatic urethral length could predict need of surgery in patients with benign prostatic hyperplasia.Methods: This prospective observational study was conducted over a 12-months duration. All the patients who presented with lower urinary tract symptoms secondary to benign prostatic hyperplasia were evaluated with International Prostate Severity Score, serum Prostate Specific Antigen, Transrectal Ultrasound was done to measure prostatic urethral length, prostate volume, Intravesical prostatic protusion and Post-void Residual Urine. Patients not responding to medical treatment and complications secondary to benign prostatic hyperplasia underwent surgery. Logistic regression analysis was performed to identify risk factors associated with surgery. Results: A total of 153 patients were included in the study. Eighty-three (54.2%) patients underwent surgery during the study period. Prostate volume, intravesical prostatic protrusion, post-void residual volume, serum prostate specific antigen, and prostatic urethral length were significantly higher in the surgical group. The mean prostatic urethral length in the surgical group was 39.47 + 10.2 mm and in the nonsurgical group was 26.20 + 6.72 mm (p <0.0001). According to the ROC curve-based prediction of surgery, the area under the curve for PUL was 0.866 and the best cutoff value was 31.5mm (81% sensitivity and 84.3% specificity).Conclusions: BPH patients with longer PUL may require surgical management. PUL measured by TRUS may be a predicting factor for the need of surgery in BPHKeywords: Benign prostatic hyperplasia; lower urinary tract symptoms; prostatic urethral length.