Supine versus prone PCNL in lower calyceal stone: Comparative study in a tertiary care center

Abstract

Introduction: Renal calculus disease is an age old disease of human being. PCNL (Percutaneous nephrolithotomy) stands as a gold standard treatment for large renal calculus which is traditionally being done in prone position. Objective: To evaluate the safety and efficacy of supine PCNL versus prone PCNL comparing intraoperative time, requirement of relook PCNL, post op hemoglobin drop, post operative hospital stay, post operative complication, SFR ( stone free rate). Methods and materials: It is a prospective study done in Urology department in a tertiary care center in Eastern India between October 2017 and October 2018. A total of 84 patients with lower calyceal renal stones underwent PCNL, 42 of them in supine and 42 in prone position. Lower calyceal stone, size measuring 1 to 2 cm were included in the study. Results: The mean intra operative time was 91.76 min in supine group and 85.43 min in prone group with a p value of 0.115. The mean hemoglobin drop was 1.11 g/dl and 1.18 g/dl in supine and prone position, respectively ( p value 0.75). The mean post operative hospital stay was 4.1 and 3.86 days in supine and prone group ( p value 0.58), respectively. Two patients in each group require relook PCNL. Stone free rate at 1 month was 95.23% and 90.47% ( p value 0.9), respectively in case of supine and prone group. Conclusion: Supine PCNL is feasible, comparable to prone PCNL in respect to operative parameters with relatively higher stone free rate though statistically insignificant.

Feasibility of Performing Supine Percutaneous Nephrolithotomy for Solitary Renal Pelvic Stones (1.5-3 cm) Under Spinal Anaesthesia: A Single-Centre Study

“…This can be attributed to the prolonged analgesic effect of RA. The mean hospital stay in our study (3.33 ± 0.88 days) was similar to that reported by Gupta and Mahajan and Choudhury et al (4.1 days) [16,19].…”

The Significance of Position in Percutaneous Nephrolithotomy

“…In the study by Choudhury et al, the stone-free rates were 95.26% for supine mPNL and 90.47% for prone mini-PNL, and there was no signi cant difference between the two [11]. Liu L and Zheng in their metaanalysis of 2 randomized trials did not nd a statistically signi cant difference in success between supine and prone sPNL (83.5% and 81.6% respectively) [12].…”