Preoperative ROX Index and Postoperative Hypoxemia in Bariatric Surgery

Istinye University

Status: Not yet enrolling

Conditions: Hypoxemia

Treatments: Other: Preoperative ROX Index Assessment

Study type: Observational

Funder types: Other

Identifiers

NCT07303205

erkan rox indeksi

Details and patient eligibility

About

This prospective observational study evaluates whether the preoperative ROX index can predict early postoperative hypoxemia in patients undergoing bariatric surgery. Preoperative ROX measurements, along with ARISCAT and STOP-Bang scores, will be assessed for their association with hypoxemia occurring within the first 12 postoperative hours.

Enrollment: 80 estimated patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Adults aged 18-65 years
• Scheduled for elective bariatric surgery (laparoscopic sleeve gastrectomy or Roux-en-Y gastric bypass)
• Body mass index (BMI) ≥ 35 kg/m²
• ASA physical status I-III
• Able and willing to provide written informed consent

Exclusion criteria

• Acute respiratory failure, pneumonia, or active pulmonary infection
• Receiving oxygen therapy or respiratory support (nasal cannula, CPAP, BiPAP, or high-flow oxygen) preoperatively
• Preoperative SpO₂ < 88% on room air
• Significant cardiac arrhythmia, severe heart failure (NYHA class III-IV), or hemodynamic instability
• Pregnancy, active malignancy, or current immunosuppressive therapy
• Inability to complete postoperative follow-up or early discharge before 12-hour assessment