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
试验速览
- 阶段
- 不适用
- 状态
- 尚未招募
- 入组人数
- 100
- 试验地点
- 1
- 主要终点
- postoperative SpO₂/FiO₂ Ratio
研究概览
简要总结
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.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age ≥ 18 years
- •Patients who provide written informed consent
- •ASA physical status I-III
- •Patients undergoing elective laparoscopic cholecystectomy
- •Surgery performed in the reverse Trendelenburg position (30°)
- •Expected operative duration < 3 hours
排除标准
- •Age < 18 years
- •Refusal or inability to provide informed consent
- •ASA physical status IV or higher
- •Known chronic respiratory diseases (e.g., asthma, COPD)
- •Severe cardiac failure (NYHA class III-IV) or advanced cardiovascular disease
- •Emergency surgery
- •Preoperative oxygen supplementation or baseline SpO₂ < 90%
- •Prolonged intubation or perioperative respiratory complications
- •Requirement for postoperative noninvasive ventilation or intensive care unit admission
- •Missing SpO₂ or FiO₂ data preventing calculation of the SpO₂/FiO₂ ratio
研究组 & 干预措施
Postoperative Observational Cohort
干预措施: Standard of Care (Other)
control
干预措施: Standard of Care (Other)
结局指标
主要结局
postoperative SpO₂/FiO₂ Ratio
时间窗: Within the first postoperative hour (0-60 minutes after surgery)
The SpO₂/FiO₂ ratio calculated using peripheral oxygen saturation (SpO₂) and fraction of inspired oxygen (FiO₂) measured during the early postoperative period to assess postoperative oxygenation.
次要结局
未报告次要终点