Minor changes since publication
October 2022: We added text to indicate that pulse oximetry may be less reliable in people with dark skin. We also added a link to the NHS patient safety alerton the risk of harm from inappropriate placement of pulse oximeter probes. See recommendation 1.6.9.
October 2021: We added a link to NICE's shared decision making guideline in recommendation 1.2.8.
November 2017: details of marketing authorisation in footnote 1 corrected.