Laparoscopic Partial Nephrectomy: Off-Clamp Versus on Clamp

The aim of this study is to describe our experience in laparoscopic partial nephrectomy and to compare the differences between off-clamp and on-clamp techniques in terms of clinical characteristics and outcomes.

A retrospective study was utilized. A purposeful sampling method was used to select the patients. The inclusion criteria for kidney tumors were as follows: exophytic, maximum diameter 3 cm, RENAL score 4 or more, solid or cystic, and suspected of malignancy. Around 32 participants were selected. The data were collected from patient files.

There were no statistically significant differences between the mean of the off-clamp group and the on-clamp group in terms of tumor size, size of the kidney, and the position of the tumor. The average expected blood loss in the off-clamp group was 150.15 +/- 60.25 mL and in the on-clamp group was 75.25+/- 40.11 mL, with a p-value of less than 0.001. There was no statistically significant difference between the two groups in terms of the most common surgical complications, postoperative drainage, overall operation time, renorrhaphy time, and postoperative bedtime.

The off-clamp group was shown to have a higher tumor resection duration as well as a higher rate of expected blood loss. The functional result of alterations in the estimated glomerular filtration rate seemed to be better in the off-clamp group. We expect to understand its long-term safety and oncological efficacy better as we continue to use this method.