Effect of Preoxygenation Position and Examination Position on Hypoxemia During Painless Gastroint… (NCT07673042) | Clinical Trial Compass
Not Yet RecruitingNot Applicable
Effect of Preoxygenation Position and Examination Position on Hypoxemia During Painless Gastrointestinal Endoscopy
China208 participantsStarted 2026-06-23
Plain-language summary
To investigate the independent effects and interaction of pre-oxygenation position (left lateral vs left lateral with 30° head-up tilt) and examination position (left lateral vs left lateral with 30° head-up tilt) on hypoxemia during painless gastroscopy and colonoscopy using a 2×2 factorial design.
Who can participate
Age range
18 Years – 75 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Aged 18 to 75 years, regardless of gender
* Body mass index (BMI): 18.5 - 35 kg/m²
* ASA physical status class I, II or III
* Scheduled for painless gastroscopy, painless colonoscopy, or combined painless gastroenteroscopy
* Able to understand the study procedure and provide written informed consent
Exclusion Criteria:
* Severe cardiopulmonary diseases, including severe COPD, heart failure, severe arrhythmia and pulmonary hypertension
* Difficult airway identified before anesthesia
* Severe obstructive sleep apnea (OSA)
* Spinal or thoracic deformity
* Preoperative baseline hypoxemia
* Known allergy to any anesthetic drugs used in this study
* Pregnant females
* Unable to cooperate with required intraoperative body position
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Incidence of hypoxemia
Timeframe: During procedure
Trial details
NCT IDNCT07673042
SponsorGeneral Hospital of Ningxia Medical University