This prospective observational study aims to evaluate the effectiveness of Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) compared to standard nasal cannula (SNC) oxygen supplementation in patients undergoing elective diagnostic gastroscopy under propofol sedation. The primary outcome is the incidence of hypoxemia (SpO₂ \<93% for ≥20 seconds) during the procedure. Secondary outcomes include the need for airway intervention, Oxygen Reserve Index (ORi) values, peripheral oxygen saturation (SpO₂) levels, and hemodynamic parameters recorded throughout the procedure. Oxygen delivery method was selected by the attending anesthesia provider independent of the study team.
Who can participate
Age range
18 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:
* Age ≥18 years
* ASA physical status I-III
* Body mass index (BMI) \<35 kg/m²
* Scheduled for elective diagnostic gastroscopy under propofol sedation
* Baseline SpO₂ \>93% on room air prior to the procedure
* Hemoglobin level ≥10.0 g/dL prior to the procedure
* Willing and able to provide written informed consent
Exclusion Criteria:
* Severe chronic pulmonary disease (e.g., COPD, interstitial lung disease)
* Severe chronic cardiac disease
* BMI ≥35 kg/m²
* Pregnancy
* History of facial or oropharyngeal surgery
* Baseline SpO₂ ≤93% on room air prior to the procedure
* Hemoglobinopathy
* Hemoglobin level \<10.0 g/dL prior to the procedure
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 During Procedural Sedation
Timeframe: From induction of sedation until end of the endoscopic procedure (estimated 10-30 minutes)
Trial details
NCT IDNCT07487051
SponsorFatih Sultan Mehmet Training and Research Hospital