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RecruitingNot ApplicableNCT07545642

Effect of Lateral Versus Supine Positions on Postoperative Hypoxemia

Effect of Lateral Versus Supine Positions on Postoperative Hypoxemia in Patients Undergoing Painless Gastroscopy and Colonoscopy: A Prospective Randomized Controlled Study

Sponsor

General Hospital of Ningxia Medical University

Enrollment

960 participants

Start Date

Apr 23, 2026

Study Type

INTERVENTIONAL

Conditions

Postoperative Hypoxemia

Summary

Using prospective real-world data, this study aims to determine whether the lateral decubitus position reduces the incidence of post-procedure hypoxemia in patients undergoing painless gastroscopy/colonoscopy, thereby providing a simple, non-invasive, and low-cost optimization strategy for clinical practice.

Eligibility

Min Age: 18 Years

Inclusion Criteria5

  • Age ≥ 18 years.
  • Both sexes.
  • American Society of Anesthesiologists (ASA) physical status classification I-III.
  • Scheduled for combined painless esophagogastroduodenoscopy/colonoscopy or either of the two procedures.
  • Ability to understand the study protocol and provide written informed consent.

Exclusion Criteria6

  • Severe cardiovascular or cerebrovascular diseases.
  • Pregnant patients.
  • History of hypersensitivity to ciprofol.
  • Withdrawal Criteria:
  • Endotracheal intubation required during the procedure.
  • Voluntary withdrawal requested by the patient or their legal representative.

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Interventions

PROCEDURELateral decubitus position group (Group L)

Upon admission to the Post-Anesthesia Care Unit (PACU), an independent researcher (attending anesthesiologist) assessed the patient using the Ramsay Sedation Scale (1: anxious and agitated; 2: awake, calm, and cooperative; 3: drowsy but responsive to verbal commands; 4: asleep but responsive to tactile stimulation or pain; 5: asleep with a sluggish response to stimulation; 6: deep sleep with no response). Patients in the Lateral Group (Group L) were maintained in the predetermined left lateral position. Standard monitoring was applied, and nasal cannula oxygen was administered at 2 L/min. If SpO₂ remained \>95% for at least 5 minutes, oxygen was discontinued for observation. To ensure strict adherence to the protocol, an independent researcher continuously monitored and verified patient positioning (corrections were made only if the patient rolled unconsciously). Patients were evaluated using the Aldrete discharge scoring system; discharge from the PACU occurred when a score of \>9 was a

PROCEDURESupine position group (Group S)

Upon admission to the Post-Anesthesia Care Unit (PACU), an independent researcher (attending anesthesiologist) assessed the patient using the Ramsay Sedation Scale (1: anxious and agitated; 2: awake, calm, and cooperative; 3: drowsy but responsive to verbal commands; 4: asleep but responsive to tactile stimulation or pain; 5: asleep with a sluggish response to stimulation; 6: deep sleep with no response). Patients in the Supine Group (Group S) were turned from the predetermined lateral position to the supine position without a head pillow (head-of-bed elevation at 0 degrees). Standard monitoring was applied, and nasal cannula oxygen was administered at 2 L/min. If SpO₂ remained \>95% for at least 5 minutes, oxygen was discontinued for observation. To ensure strict adherence to the protocol, an independent researcher continuously monitored and verified patient positioning (corrections were made only if the patient rolled unconsciously). Patients were evaluated using the Aldrete discharge

Locations(1)

General hospital of Ningxia medical university, Yinchuan, Ningxia

Yinchuan, Ningxia, China

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NCT07545642