Nature and Science of Sleep (Aug 2024)
Averaging Times for Pulse Oximeter Measurements – A Review of Manuscripts Published in the Top Five Sleep Medicine Journals
Abstract
Jan Vagedes,1,2 Mohsen Sobh,2 Mohammad Oli Al Islam,2 Christian F Poets1 1Department of Neonatology, Children’s Hospital, University of Tübingen, Tübingen, Germany; 2ARCIM-Institute, Research Department, Filderklinik, Filderstadt, GermanyCorrespondence: Jan Vagedes, ARCIM Institute, Im Haberschlai 7, Filderstadt, 70794, Germany, Tel +49 711 7703-1687, Email [email protected]: Clinical management decisions often rely on a patient’s SpO2 level and desaturation rate. Limitations include that measurements depend on the averaging time (AVT) used, which is particularly relevant to sleep medicine, but has yet received little attention.Methods: Cross-sectional review of studies reporting pulse oximeter saturation (SpO2) measurements published in 5 leading sleep medicine journals. All papers published between 2017 and 2023 reporting SpO2 measurements were screened regarding the AVT used.Results: Of 193 papers identified, 151 were included; of these, only 9 studies mentioned the AVT, 4 of these were published in one journal. The AVT ranged from zero (beat-to-beat-mode) to 10s, with 3s being used most often (33.3%), followed by 2s (22.2%).Conclusion: The AVT is only rarely mentioned in sleep medicine papers, despite its influence on sleep study results. Reported AVTs were heterogenous. Further research is warranted to set up guidelines for using or reporting the AVT.Keywords: pulse oximetry, averaging time, oxygen saturation, desaturation, SpO2, sleep medicine
