Comparison of hemodynamic and respiratory outcomes between two surgical positions for percutaneous nephrolithotomy: a prospective, randomized clinical trial.

Introduction: Percutaneous nephrolithotomy (PCNL) has become the gold standard for the treatment of large and complex kidney stones.

Objectives: The objective of this study is to evaluate the efficacy and safety of percutaneous nephrolithotomy (PCNL) for patients in the flank position versus prone position.

Methods: In our prospective randomized trial, 60 patients who would undergo fluoroscopy and ultrasound-guided PCNL in prone or flank position were divided into two groups. Demographic features, hemodynamics, respiratory and metabolic parameters, postoperative pain scores, analgesic requirements, amount of fluid given, blood loss and transfusion, duration of operation and hospital stay, and perioperative complications were compared.

Results: PaO, SaO, SpO and Oxygen Reserve İndex (ORi) at the 60th minute of the operation and in the postoperative period, Pleth Variability index (PVi) at the 60th minute of the operation, driving pressure in all time periods and the amount of bleeding during the operation were determined to be statistically significantly higher in the prone group. There was no difference between the groups in terms of other parameters. Was found to be statistically significantly higher in the prone group.

Conclusions: Due to our results the flank position can be preferred in PCNL operations, considering that the position should be chosen according to the surgeon's experience, the patient's anatomical and physiological data, positive effects on respiratory parameters and bleeding, and the operation time can be shortened as the experience increases.