Surgical Parameters Related to Excessive Intrarenal Pressure During Minimally Invasive Percutaneous Nephrolithotomy in the Supine Position: A Prospective Observational Clinical Study

Overview

Journal Biomed Res Int

Publisher Wiley

Specialties Biomedical Engineering
Biotechnology
General Medicine

Date 2022 Jul 22

PMID 35865668

Authors

Gyoohwan Jung

Yongseok Kho

Jae Suk Park

Hyeong Dong Yuk

Seung Hoon Ryang

Sung Yong Cho

Affiliations

Soon will be listed here.

Abstract

Objective: Excessive intrarenal pressure (IRP) during surgery for renal stones is related to postoperative complications due to systemic absorption of bacteria and endotoxins. This study is aimed at evaluating factors that induce excessive IRP in minimally invasive percutaneous lithotripsy (mini-PCNL) in the supine position.

Methods: 27 patients underwent mini-PCNL for intrarenal stones under supine position and were analyzed in this study. The IRP changes were measured at the phases of "baseline," "table tilting," "upper-pole navigation," "stone fragmentation," and "vacuum cleaning effect." The relationship between the mean IRP and cumulative time of IRP ≥ 30 cmHO was analyzed by according to the surgical parameters. Multiple regression analysis showed the effect of the surgical parameters on postoperative fever-related IRP elevation.

Results: Mean age was 59.3 ± 14.6 years. The mean stone burden was 24.6 ± 8.1 mm. IRP was higher than baseline (31.6 ± 12.1) during upper-pole navigation (60.0 ± 22.9, = 0.003) and stone fragmentation (46.2 ± 9.9, < 0.001). The subgroup's IRP baseline < 20 cmHO significantly increased during the upper-pole navigation. Changes in IRP at each stage were affected by baseline IRP ( < 0.001), operation methods ( = 0.021), number of calyces with stones ( = 0.034), and laser energy of Joules ( = 0.041) and frequency ( = 0.038).

Conclusion: In supine mini-PCNL, the IRP was higher during laser fragmentation and upper-pole navigation. The table tilting procedure can be helpful in selected patients. The vacuum cleaner effect did not affect IRP.

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