Oxygen Delivery Methods of Nasal Catheter on the Incidence of Hypoxemia in Patients With Painless Gastroscopy

Study Overview
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Brief Summary
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In this study, patients undergoing painless gastroscopy were selected to change the nasal catheter oxygen delivery mode to oral oxygen delivery after endoscope implantation, in order to explore the effect of this oxygen delivery mode on the incidence of hypoxemia during general anesthesia gastroscopy.

Detailed Description
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This study was a randomized controlled study in which patients undergoing elective painless gastroscopy were selected and grouped by random number table. The control group used conventional nasal cannula oxygen method: nasal cannula was used before and after gastroscopy was implanted and after withdrawing from the gastroscopy. Test group: nasal cannula nasal oxygen before gastroscopy placement, nasal cannula oxygen delivery after gastroscopy placement, nasal cannula nasal oxygen delivery after exit gastroscopy, nasal cannula nasal oxygen after exiting gastroscopy. The incidence of intraoperative hypoxemia was observed.

Official Title
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The Effect of Different Oxygen Delivery Methods of Nasal Catheter on the Incidence of Hypoxemia in Patients With High Risk of Hypoxia During Painless Gastroscopy

Conditions
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Hypoxemia

Intervention / Treatment
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* Other: Oxygen delivery mode


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients who receiving gastroscopy under general anesthesia, accompanied with one of the following risk factors of hypoxia: Patients combined with heart or respiratory diseases Age older than 60 ASA grading II-III BMI≥30kg/m², Snoring or having sleep apnea syndrome Patients with a STOP-Bang score ≥ 3 (the risk of OSAS is high) are considered to be highly risk of hypoxia. Exclusion Criteria: Severe cardiovascular, pulmonary, liver, or kidney disease Patients with infections or tumors of airway History of difficult intubation under general anesthesia Severe sleep apnea syndrome [hypopnea/apnea hypopnea index (AHI)>40] Patients allergic to propofol, eggs, soy or egg whites Pregnancy

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Group A<br>Transnasal oxygen was administered by nasal catheter before gastroscopy, transoral oxygen was administered by nasal catheter after gastroscopy, and transnasal oxygen was administered by nasal catheter after withdrawal of gastroscope. | Other: Oxygen delivery mode<br>* After the implantation of the mirror, nasal catheter was used to give oxygen through the mouth<br>|
| No Intervention: Group B<br>Nasal catheter was used to give oxygen before, after and after withdrawal of gastroscope | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of hypoxemia | SpO2<92% | Five minutes after finishing gastroscopy examination |