This study aims to evaluate the effects of prone positioning on oxygenation, ventilation, and hemodynamic parameters in patients undergoing posterior stabilization surgery under general anesthesia. By comparing routine anesthesia and monitoring data obtained in the supine and prone positions, the study seeks to determine how positional changes influence respiratory mechanics and perioperative physiological stability.
The prone position is frequently used during posterior stabilization surgery, yet it is associated with important physiological changes that may affect both respiratory and hemodynamic function under general anesthesia. Previous studies have shown that prone positioning may improve ventilation-perfusion matching, increase functional residual capacity, and enhance oxygenation. At the same time, position-related alterations in thoracic mechanics, airway pressures, venous return, and cardiovascular parameters may influence intraoperative management. This study is designed to comprehensively assess the physiological effects of prone positioning in anesthetized patients undergoing posterior stabilization surgery. Routine anesthesia and monitoring data collected during mechanical ventilation will be analyzed and compared between the supine and prone positions. Particular focus will be placed on oxygenation, ventilation variables, respiratory mechanics, and hemodynamic parameters in order to evaluate the impact of positional change. In addition, the study aims to identify which clinical and monitoring findings should be prioritized during anesthetic management of patients in the prone position. By clarifying the relationship between positioning and perioperative physiological responses, the study seeks to contribute to safer anesthetic practice and to support the maintenance of adequate oxygenation and hemodynamic stability throughout surgery.
Study Type
OBSERVATIONAL
Enrollment
50
Arterial blood gas samples will be obtained from patients, and alveolar oxygenation ratios will be compared between the supine and prone positions.
Sakarya Universt
Sakarya, Karabük Province, Turkey (Türkiye)
Change in alveolar oxygenation between supine and prone positions
The primary outcome of this study is to evaluate the difference in alveolar oxygenation between the supine and prone positions in patients undergoing posterior stabilization surgery. Arterial blood gas samples obtained during surgery will be used to compare oxygenation parameters measured in both positions and to assess the effect of positional change on oxygenation.
Time frame: within 20 minutes after anesthesia induction
Change in optic nerve sheath diameter between supine and prone positions
The secondary outcome is the comparison of optic nerve sheath diameter measurements obtained in the supine position and after positioning the patient prone during posterior stabilization surgery. This assessment is intended to evaluate the effect of positional change on optic nerve sheath diameter.
Time frame: intraoperatively
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.