Effect of Preoxygenation Position and Examination Position on Hypoxemia During Painless Gastrointestinal Endoscopy

Phase

NOT_YET_RECRUITING

Status

208

Enrollment

OTHER

Sponsor class

Conditions

PROCEDURE: Pre-oxygenation Position （left lateral position）
PROCEDURE: Examination Position（left lateral position ）
PROCEDURE: Pre-oxygenation Position（ left lateral head elevation in a 30-degree position）
PROCEDURE: Examination Position（left lateral head elevation in a 30-degree position）

General Hospital of Ningxia Medical University