RT Journal Article SR Electronic T1 Pulse oximetry in children JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 117 OP 118 DO 10.1136/archdischild-2013-305526 VO 99 IS 3 A1 Ian P Sinha A1 Sarah J Mayell A1 Clare Halfhide YR 2014 UL http://ep.bmj.com/content/99/3/117.abstract AB Pulse oximetry is routinely used in hospitals in high-income settings, but its theoretical basis is often poorly understood. 1 This paper summarises the physiological background, technological basis and limitations of pulse oximetry.