Jan Vagedes1, Christian F Poets, Klaus Dietz. 1. Department of Neonatology, Children's Hospital, University of Tübingen, Calwerstr. 7, 72076 Tübingen, Germany.
Abstract
BACKGROUND: Pulse oximeter saturation values are usually obtained by averaging over preceding measurements. This study investigates the dynamics between the averaging time and desaturation level, duration and extent. METHODS AND RESULTS: Prospective observational study of 15 preterm infants. Oxygen saturation was recorded for 168 h using a pulse oximeter. The raw red-to-infrared data were reprocessed using seven different averaging times to determine the number of desaturations below four thresholds and for seven different minimal desaturation durations. The total number of desaturations <80% was 339 with an averaging time of 16 s and 1958 with an averaging time of 3 s (minimal event duration >0 s). There was a significantly lower pulse oximeter saturation nadir with the shorter averaging time, while the maximum duration was significantly longer when using a 16 s averaging time. CONCLUSIONS: When using pulse oximeters, more attention should be given to averaging time and duration of desaturations.
BACKGROUND: Pulse oximeter saturation values are usually obtained by averaging over preceding measurements. This study investigates the dynamics between the averaging time and desaturation level, duration and extent. METHODS AND RESULTS: Prospective observational study of 15 preterm infants. Oxygen saturation was recorded for 168 h using a pulse oximeter. The raw red-to-infrared data were reprocessed using seven different averaging times to determine the number of desaturations below four thresholds and for seven different minimal desaturation durations. The total number of desaturations <80% was 339 with an averaging time of 16 s and 1958 with an averaging time of 3 s (minimal event duration >0 s). There was a significantly lower pulse oximeter saturation nadir with the shorter averaging time, while the maximum duration was significantly longer when using a 16 s averaging time. CONCLUSIONS: When using pulse oximeters, more attention should be given to averaging time and duration of desaturations.
Authors: Anna A Lerant; Robert L Hester; Thomas G Coleman; William J Phillips; Jeffrey D Orledge; W Bosseau Murray Journal: Int J Med Sci Date: 2015-07-23 Impact factor: 3.738
Authors: Augusto Sola; Sergio G Golombek; María Teresa Montes Bueno; Lourdes Lemus-Varela; Claudia Zuluaga; Fernando Domínguez; Hernando Baquero; Alejandro E Young Sarmiento; Diego Natta; Jose M Rodriguez Perez; Richard Deulofeut; Ana Quiroga; Gabriel Lara Flores; Mónica Morgues; Alfredo García-Alix Pérez; Bart Van Overmeire; Frank van Bel Journal: Acta Paediatr Date: 2014-07-28 Impact factor: 2.299