NCT07401589

Postoperative SpO₂/FiO₂ Ratio and Analgesic Methods in Laparoscopic Surgery

Association of Postoperative SpO₂/FiO₂ Ratio With Body Mass Index, STOP-BANG Score, and Analgesic Methods in Patients Undergoing Laparoscopic Surgery in Reverse Trendelenburg Position

• Status: Not Yet Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 100 (estimated)
• Sponsor: Istinye University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This prospective observational study aims to evaluate the association between postoperative oxygenation, assessed by the SpO₂/FiO₂ ratio, and body mass index (BMI), STOP-BANG score, and postoperative analgesic methods in patients undergoing elective laparoscopic cholecystectomy in the reverse Trendelenburg position. Postoperative SpO₂ and FiO₂ values will be recorded within the first postoperative hour, and the SpO₂/FiO₂ ratio will be calculated. Analgesic techniques applied as part of routine clinical practice will be documented. The study does not involve any additional intervention beyond standard care. The findings are expected to contribute to a better understanding of factors associated with early postoperative oxygenation and hypoxemia risk.

Conditions

• Postoperative Hypoxemia

Interventions

Type	Name	Description
OTHER	Standard of Care	No intervention is applied in this study. Patients are managed according to routine clinical practice. Demographic data, body mass index, STOP-BANG score, postoperative analgesic methods, and postoperative SpO₂ and FiO₂ values are recorded, and the SpO₂/FiO₂ ratio is calculated. All data are collected observationally without any additional procedures or changes to standard care.

Timeline

• Start date: 2026-02-15
• Primary completion: 2026-03-15
• Completion: 2026-03-31
• First posted: 2026-02-10
• Last updated: 2026-02-10

Locations

1 site across 1 country: Turkey (Türkiye)