Preoperative ROX Index and Postoperative Hypoxemia in Bariatric Surgery
NCT ID: NCT07303205
Last Updated: 2025-12-24
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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NOT_YET_RECRUITING
80 participants
OBSERVATIONAL
2025-12-25
2026-03-01
Brief Summary
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Detailed Description
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Conditions
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Study Design
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COHORT
PROSPECTIVE
Interventions
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Preoperative 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.
Eligibility Criteria
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Inclusion Criteria
* 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
* 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
18 Years
65 Years
ALL
No
Sponsors
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Istinye University
OTHER
Responsible Party
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İlke Dolgun
Assoc. prof
Locations
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Istinye Üniversity
Istanbul, Merkez Mahallesi, Turkey (Türkiye)
Countries
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Central Contacts
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References
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Helmy MA, Mostafa MS, Saber AT, Ali MA, Milad LM. Erector Spinae Plane Block and its Impact on Postoperative Diaphragmatic Dysfunction in Morbidly Obese Patients Undergoing Laparoscopic Sleeve Gastrectomy: A Double-Blind Randomized Control Trial. Obes Surg. 2025 Nov 4. doi: 10.1007/s11695-025-08337-y. Online ahead of print.
Wang X, Guo K, Sun J, Yang Y, Wu Y, Tang X, Xu Y, Chen Q, Zeng S, Wang L, Liu S. Semirecumbent Positioning During Anesthesia Recovery and Postoperative Hypoxemia: A Randomized Clinical Trial. JAMA Netw Open. 2024 Jun 3;7(6):e2416797. doi: 10.1001/jamanetworkopen.2024.16797.
Lee S, Hong H, Cho H, Lee SW, You AH, Kang HY, Park SW, Kim MK, Choi JH. Association between preoperative oxygen reserve index and postoperative pulmonary complications: a prospective observational study. Korean J Anesthesiol. 2025 Jun;78(3):224-235. doi: 10.4097/kja.24420. Epub 2025 Feb 17.
Other Identifiers
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erkan rox indeksi
Identifier Type: -
Identifier Source: org_study_id