Wearable in-ear pulse oximetry validly measures oxygen saturation between 70% and 100%: A prospective agreement study.

Objectives: Postoperative monitoring outside intensive and post-anaesthesia care units is seldom, partly due to lack of suitable and approved systems. We therefore aim to validate the oxygen saturation (SpO) and pulse rate measurement of the in-ear sensor c-med° alpha with a reference pulse oximeter.

Methods: This prospective agreement study was conducted in 12 healthy (ASA 1) adult (18-50 years) volunteers according to the EN ISO 80601-2-61.