To evaluate the safety, efficacy, adverse events, and feasibility of ultrasound guided percutaneous
nephrolithotomy (US-PCNL) in the management of large renal stones in supine and prone positions
and to point out the practical considerations related to these techniques in comparison with
standard PCNL.
PATIENTS AND
METHODS
This study was conducted between August 2013 to September 2018 as a prospective randomized
and controlled study. A total of 392 consecutive patients with nephrolithiasis >2 cm were randomly
assigned to undergo ultrasound PCNL in prone (P-US-PCNL) (132 patients); supine position
(S-US-PCNL) (129 patients) or conventional PCNL (C-PCNL) (131 patients). The
preoperative parameters, the intraoperative findings, operative time, hospital stay, perioperative
morbidities, stone free rate, and related data were recorded.
RESULTS The demographic and the baseline characteristics were comparable in all study groups. The
mean number of trails and time for successful puncture in P-US-PCNL, S-US-PCNL, and
C-PCNL were 1.9 § 1, 2.3 § 1.2, and 1.7§1, respectively (P < .001), and 15.8 § 5.8, 19.3 §
9.4, and 16.5 § 8.1 seconds, respectively (P < .001). The operation time was 69 § 22, 75 §
23, and 72 § 27 minutes, respectively, (P > .05). The mean nephrostomy time and length of
hospital stay were 3 § 1.3, 3.4 § 1.5, 3.2 § 1.2 hours, respectively, and 3.8 § 1.5, 4.1 § 1.5,
3.9 § 1.3 days, respectively (P > .05). The mean percentage decrease in hemoglobin concentration
was 1.65 § 0.66, 1.77 § 0.78, and 2.1 § 0.9, respectively (P < .001), overall stone clearance
was 88%, 79%, and 85%, respectively (P > .05). Complications were acceptable and
similar between groups. |
