Effects of Sedation and Supplemental Oxygen during Upper Alimentary Tract Endoscopy

M. W. R. Reed University Depts. of Surgery and Anaesthesia, University of Sheffield, Sheffield, UK

D. P. O'leary University Depts. of Surgery and Anaesthesia, University of Sheffield, Sheffield, UK

J. L. Duncan University Depts. of Surgery and Anaesthesia, University of Sheffield, Sheffield, UK

A. W. Majeed University Depts. of Surgery and Anaesthesia, University of Sheffield, Sheffield, UK

B. Wright University Depts. of Surgery and Anaesthesia, University of Sheffield, Sheffield, UK

C. S. Reilly University Depts. of Surgery and Anaesthesia, University of Sheffield, Sheffield, UK

Abstract

The effects of supplemental oxygen therapy on arterial oxygen saturation (Sao₂) in unsedated and sedated patients have been studied using pulse oximetry. Hypoxia (minimum Sao₂ 92% or less) occurred in 41% of unsedated patients breathing room air but in only 11% (p < 0.01) of those receiving supplemental oxygen (41/min) by nasal cannulae. Comparable effects were seen in sedated patients (60% versus 16%, respectively, p < 0.01). Hypoxia during upper alimentary tract endoscopy is common with or without sedation and can be reduced by supplemental oxygen.

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Effects of Sedation and Supplemental Oxygen during Upper Alimentary Tract Endoscopy

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Effects of Sedation and Supplemental Oxygen during Upper Alimentary Tract Endoscopy

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