AJNN
Academic Journal of Neuropsychiatry and Neuropsychology

Academic Journal of Neuropsychiatry and Neuropsychology (formerly known as the Academic Journal of Neurology and Neurosurgery, e-ISSN:3023-6517), deals with neurology, neurosurgery, psychiatry and clinical psychology accepts articles on these topics. Academic Journal of Neuropsychiatry and Neuropsychology publishes original research articles, review articles, case reports, editorial commentaries, letters to the editor, educational articles, and conference/meeting announcements.

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Original Article
Comparison of pulmonary and hemodynamic parameters in patients undergoing lumbar disc herniation surgery in prone and sitting-prone positions
Abstract
Aims: Patient positioning during lumbar spine surgery plays a crucial role in determining both surgical exposure and perioperative physiological stability. This study aimed to compare the effects of prone and sitting-prone (knee-chest) positions on pulmonary and hemodynamic parameters in patients undergoing lumbar disc herniation surgery under general anesthesia.
Methods: This retrospective observational study included 50 patients classified as ASA I–III who underwent lumbar disc herniation surgery between March 2024 and March 2025. Patients were divided into two groups based on intraoperative positioning: prone (n=25) and sitting-prone (n=25). Hemodynamic variables, arterial blood gas parameters, and respiratory mechanics were recorded at three time points: in the supine position, immediately after positioning, and 30 minutes after surgical incision. Statistical analysis was performed using SPSS software, and a p-value <0.05 was considered statistically significant.
Results: Baseline demographic and physiological parameters were comparable between the groups. Following positioning, lower diastolic blood pressure values were observed in the sitting-prone group. At 30 minutes intraoperatively, oxygenation parameters were higher and peak airway pressure values were lower in the sitting-prone group compared to the prone group. These findings indicate improved pulmonary mechanics in the sitting-prone position.
Conclusion: The sitting-prone position appears to provide superior oxygenation and lower airway pressures compared to the prone position, while maintaining acceptable hemodynamic stability. These findings suggest that sitting-prone positioning may be considered a safer and more physiologically advantageous alternative during lumbar spine surgery.

Keywords : Prone position, sitting-prone position, lumbar herniation surgery, pulmonary mechanics, general anesthesia

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Article available in :
Volume 3, Issue 2, 2026
Page : 38-41
https://doi.org/10.51271/AJNN-0049
Article Information
Received : 14 Nis 2026
Accepted : 01 Haz 2026
Published : 27 Haz 2026
Corresponding Author :

Işın Gençay: Department of Anesthesiology and Reanimation, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkiye

[email protected]
Citation : Deveci S, Gençay I, Peker K, Öğden M. Comparison of pulmonary and hemodynamic parameters in patients undergoing lumbar disc herniation surgery in prone and sitting-prone positions. Acad J Neuropsychiatry Neuropsychol. 2026;3(2):38-41. doi:10.51271/AJNN-0049

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