Monitoring pulse oximetry via radiotelemetry in freely-moving lambs.
This study was aimed at validating the use of a custom-made wireless pulse oximeter in freely moving lambs, using radiotelemetry transmission. First, measurements obtained simultaneously using the new, wireless oximeter and a standard commercially-available pulse oximeter (Nonin 8500) were compared in five lambs during 5min episodes of normoxia, hypoxia and hyperoxia. Correlation between the two oximeters for both SpO(2) and heart rate was very good, regardless of oxygenation conditions. Secondly, the capabilities of our device were assessed during more than 45h of polysomnographic recordings in seven lambs. According to the plethysmographic pulse waveform, reliable SpO(2) values were obtained in more than 85% of recording time. Multiple decreases in SpO(2) were readily observed after spontaneous apneas in preterm lambs. It is concluded that our wireless pulse oximeter performs as reliably as a standard pulse oximeter for monitoring SpO(2) variations in lambs, and offers new perspectives for researchers interested in continuous monitoring of oxygenation throughout sleep stages and wakefulness.
Reix
Philippe
P
Department of Pediatrics, Neonatal Respiratory Research Unit, Université de Sherbrooke, Que., Canada J1H 5N4.
Dumont
Sylvain
S
Duvareille
Charles
C
Cyr
Jonathan
J
Moreau-Bussière
François
F
Arsenault
Julie
J
Praud
Jean-Paul
JP
D000818:Animals; D009068:Movement; D010092:Oximetry / Q000295:instrumentation* / Q000379:methods*; D017286:Polysomnography; D015203:Reproducibility of Results; D012756:Sheep; D013686:Telemetry / Q000295:instrumentation* / Q000379:methods*