ArticleFrontiers in medicine2026
Angular threshold for intraocular pressure elevation during robot-assisted radical prostatectomy in Trendelenburg position.
Article in Frontiers in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: This study aimed to determine the angular threshold and key factors influencing intraocular pressure (IOP) elevation in patients undergoing robot-assisted radical prostatectomy (RARP) in the Trendelenburg position, to optimize patient positioning to mitigate ocular risks. Methods: This prospective study enrolled patients undergoing RARP between July 2021 and June 2022 at West China Hospital, Sichuan University. The patients were positioned at varying Trendelenburg angles (18°-28°) and leg angles. Intraoperative IOP was measured at 11 predefined time points. Receiver operating characteristic (ROC) curve analysis was used to determine the optimal cutoff values for predicting increased IOP. Univariate and multivariate analyses were used to explore the risk factors associated with increased IOP, and a predictive model for increased IOP was developed based on the risk factors. Results: A total of 223 patients scheduled for RARP were screened, and 135 patients were included for final analysis. The optimal threshold for Trendelenburg angle was 20.5°, with angles ≥20.5° significantly associated with elevated IOP ( Conclusion: Steeper Trendelenburg positioning (≥20.5°), leg angles (≥9.5°), and diabetes history are independent risk factors for intraoperative IOP elevation during RARP. These findings could highlight the importance of individualized patient positioning, favoring milder angles in high-risk patients to reduce ocular complications.
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