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Effect of Different Inspired Oxygen Concentrations on Intraoperative Recruitment Outcomes in Patients Undergoing Abdominal Surgery

NCT06746181 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 95

Last updated 2026-02-24

No results posted yet for this study

Summary

This study intends to evaluate the effect of different inhaled oxygen concentrations on the effect of lung recruitment in patients undergoing abdominal surgery. During perioperative mechanical ventilation, higher FiO2 is usually given to prevent the occurrence of hypoxemia, but there are no conclusions about the setting of optimal FiO2 during surgery.

Dynamic pulmonary compliance enables real-time monitoring of alveolar changes and is used to assess pulmonary function in intraoperative patients. The value of compliance represents the number of air-containing alveoli; the more alveoli are trapped, the less air-containing tissue there is and the lower the compliance. Lung recruitment, as part of a lung-protective ventilation strategy, is effective in opening alveoli and improving oxygenation. This single-center, randomized controlled trial will explore the optimal inspired oxygen concentration that allows patients to benefit from lung recruitment and the duration of improvement in lung compliance after lung recruitment.

Conditions

  • Pulmonary Atelectasis, Postoperative

Interventions

BEHAVIORAL

Fraction of inspiration O2(FiO2)

After the patient was admitted to the room, anesthesia induction was performed after pre-oxygenation for 3 minutes. Tracheal intubation was carried out once the medication had fully taken effect. After the surgery began, the inspired oxygen concentration was adjusted for each group. The first lung recruitment maneuver was performed 10 minutes later, and subsequent lung recruitment maneuvers were conducted when pulmonary compliance returned to baseline levels. This process was repeated, with all patients undergoing one final lung recruitment maneuver immediately at the end of the surgery.

Sponsors & Collaborators

  • Northern Jiangsu People's Hospital

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
64 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-04-01
Primary Completion
2026-01-29
Completion
2026-01-30

Countries

  • China

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 NCT06746181 on ClinicalTrials.gov