Hypoxemia
Conditions
Brief summary
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.
Interventions
OTHERPreoperative ROX Index Assessment
Participants will undergo a preoperative assessment including measurement of the ROX index (SpO₂/FiO₂ divided by respiratory rate) before bariatric surgery. No treatment or study-related intervention will be applied; all perioperative care will follow routine clinical practice.
Sponsors
Istinye University
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Early Postoperative Hypoxemia | Postoperative 0-12 hours | Hypoxemia defined as SpO₂ \< 92% or new oxygen requirement within the first postoperative hours. |
Countries
Turkey (Türkiye)
Contacts
Primary Contactilke dolgun
Outcome results
None listed