Pulmonary complications and clinical outcomes using ultrasound according to the inspired oxygen concentration during general anesthesia in elderly patients: Multi-center, randomized controlled trials

Pulmonary complications and clinical outcomes using ultrasound according to the inspired oxygen concentration during general anesthesia in elderly patients: Multi-center, randomized controlled trials - Pulmonary complications and clinical outcomes using ultrasound according to the inspired oxygen concentration during general anesthesia in elderly patients: Multi-center, randomized controlled trials

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000044412

Enrollment

142

Registered

2021-06-03

Start date

2021-04-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Patients aged more than 65 years who are undergoing lower extremity surgery

Interventions

Physiologic low inspired oxygen concentration (FIO2 0.4) during general anesthesia Conventional high inspired oxygen concentration (FIO2 0.5-1.0) during general anesthesia

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: patients undergoing lower extremity surgery

Exclusion criteria

Exclusion criteria: - Patients who refuse to undergo lung ultrasound, refusing to participate in the study - Preoperative hemodynamically unstable condition -Patients with preoperative lung abnormalities such as pneumonia, atelectasis, or previous intrathoracic procedures -consistent hypoxia even with therapy for hypoxia - patients with difficult airway - Patients with mental retardation - Patients who can not read and understand Korean

Design outcomes

Primary

Measure	Time frame
The incidence of atelectasis assessed by Lung ultrasound score (LUS) score	—

Secondary

Measure	Time frame
1) The prevalence of the abnormal findings (e.g. pneumonia) 2) The relationship between postoperative pulmonary complication and ABGA, CXR changes	—

Countries

Asia(except Japan)

Contacts

Public ContactYoung Ju Won

Guro Hospital, Korea University College of Medicine Department of Anesthesiology and Pain Medicine

moma2@naver.com82-2-2626-1437

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026