Ann Acad Med Singap
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Ann Acad Med Singap · Sep 1992
Randomized Controlled Trial Clinical TrialAn assessment of preoxygenation techniques using the pulse oximeter.
The effect of preoxygenation with varying inspired oxygen concentration on the arterial oxygen saturation during induction of anaesthesia and intubation was studied using the pulse oximeter. Sixty-five healthy, young adults, (American Society of Anaesthesiologists Class I) undergoing elective surgery were randomly divided into three groups. Group I patients were not preoxygenated. ⋯ No patient had clinical signs of hypoxaemia. Patients who were preoxygenated with either 50% oxygen and nitrous oxide or 100% oxygen showed similar and clinically insignificant desaturation during this period. One minute after intubation and manual ventilation with 100% oxygen, the saturations of all patients returned to preinduction levels.