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ORI-Guided Oxygen Therapy During One-Lung Ventilation

NCT07720778 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 58

Last updated 2026-07-22

No results posted yet for this study

Summary

High inspired oxygen concentrations (FiO₂) are commonly administered during general anesthesia to prevent hypoxemia. However, excessive oxygen administration may result in hyperoxemia, which has been associated with impaired hypoxic pulmonary vasoconstriction, increased oxidative stress, ventilation-perfusion mismatch, and postoperative pulmonary complications.

During one-lung ventilation (OLV) for thoracic surgery, higher FiO₂ is often required because of increased intrapulmonary shunting, making hyperoxemia a frequent occurrence. The Oxygen Reserve Index (ORI) is a noninvasive pulse oximetry-derived parameter that reflects moderate hyperoxemia (PaO₂ approximately 100-200 mmHg) and may facilitate more precise oxygen titration than pulse oximetry alone.

Conditions

  • Thoracic Surgery With One-lung Ventilation

Interventions

OTHER

ORI-Guided FiO2 Titration

During one-lung ventilation, FiO₂ is adjusted according to both ORI and SpO₂. FiO₂ is titrated to maintain SpO₂ ≥98% while keeping ORI above 0 to minimize hyperoxemia.

OTHER

Conventional SpO₂-Guided FiO₂ Titration

During one-lung ventilation, FiO₂ is adjusted according to SpO₂ alone. FiO₂ is titrated to maintain SpO₂ ≥98% according to the institutional standard of care.

Sponsors & Collaborators

  • Konkuk University Medical Center

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
19 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-08-01
Primary Completion
2028-04-30
Completion
2028-04-30

Countries

  • South Korea

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07720778 on ClinicalTrials.gov