Nasal Mask Kit in Gastrointestinal Endoscopy (NASO)

  • End date
    Oct 17, 2023
  • participants needed
  • sponsor
    RenJi Hospital
Updated on 7 October 2022
Accepts healthy volunteers


Hypoxia is the most common adverse event in gastrointestinal endoscopes sedated with propofol. The nasal mask oxygen kit has good sealing to ensure an adequate oxygen supply and is convenient and economical.The aim of this randomized study was to determine whether the nasal mask oxygen kit reduces the incidence of hypoxia in gastrointestinal endoscopes procedures.

Condition Hypoxia, Gastric Cancer, Gastric Polyp, Colon Polyp, Colon Cancer, Esophageal Cancer
Treatment Regular nasal cannula, nasal mask oxygen kit
Clinical Study IdentifierNCT05405530
SponsorRenJi Hospital
Last Modified on7 October 2022


Yes No Not Sure

Inclusion Criteria

≤ Age ≤60
patients undergoing combined gastroendoscopy and colonoscopy procedure
patients signed informed consent form
ASA classification I-II
Estimated procedure time <=45min

Exclusion Criteria

Coagulation disorders or a tendency of nose bleeding
Diagnosed heart disease (heart failure, angina, myocardial infarction, arrhythmia, etc.)
Diagnosed chronic obstructive pulmonary disease or current other acute or chronic lung disease requiring supplemental chronic or intermittent oxygen therapy)
hypoxia (SpO2< 90 % )
Upper respiratory tract infection
increased intracranial pressure
Fever (core body temperature >37.5 ℃)
Pregnancy, breastfeeding, or positive pregnancy test
Emergency procedure or surgery
Multiple trauma
Allergy to propofol or tape and adhesives
BMI<18.5 or BMI>30
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