Airway Management During Deep Sedation in Hysteroscopy

Hysteroscopy is used to examine and treat uterine diseases. Because of severe pain due to uterine distention and cervical dilatation, deep sedation usually be provided during this procedure. Respiratory depression and upper airway obstruction are main respiratory complications during deep sedation. Face mask and nasopharyngeal airway are main airway management during deep sedation. Oxygen reserve index is a non-invasive parameter, it reflects the moderate hyperoxia statues. In this study, investigators compare the effect of face mask and nasopharyngeal airway management on oxygenation during deep sedation in participants undergoing hysteroscopy. Investigators also investigate whether oxygen reserve index monitoring reduce the incidence of hypoxemia.

Inclusion Criteria:Female, 18-60 years oldScheduled for hysteroscopyPredict operation duration more than 10 minutesExclusion Criteria:Participants refusePredict the presence of difficult airwayCombined with obstructive sleep apnea syndromeCombined with upper respiratory tract infection, and/or pulmonary inflammationCombined with chronic obstructive pulmonary diseaseCombined with asthmaBody mass index (BMI) >30 kg/m2Coagulation dysfunction, and/or undergo anticoagulant therapyNasal deformityPregnancy, positive urine pregnancy test