Evaluation of Transmittance and Reflectance Pulse Oximetry in a Canine Model of Hypotension and Desaturation期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Evaluation of Transmittance and Reflectance Pulse Oximetry in a Canine Model of Hypotension and Desaturation

Authors:	Linda J Barton DVM Jennifer J Devey DVM Steven Gorski BSt Louis Mainiero MSt Daniel DeBehnke MD FACEP

Institution:	Vetinary Institute of Trauma, Emergency and Critical Care (VITECC), Milwaukee, Wisconsin.;Sensor Devices Inc, Waukesha, Wisconsin;**Resuscitation Research Laboratory, Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.

Abstract:	Ten, anesthetized dogs were instrumented with three pulse oximeter probes; two lingual transmittance probes and one rectal reflective probe. Arterial oxygen desaturation was produced by decreasing the inspired oxygen concentration. Hypotension was produced with an infusion of nitroprusside. Simultaneous pulse oximeter readings (SpO₂) were compared to co-oximeter measured arterial saturation (SaO₂) collected over a range of SaO₂ (50–100%) and mean arterial pressures (40–100mmHg). Each of the monitors and means of evaluating SpO₂ studied provided accurate SpO₂ measurements over a range of mean arterial pressure from 40–100mmHg. All of the monitors tested tended to overestimate the SaO₂ when the arterial saturation was less than 70%.

Keywords:	Pulse oximetry hypotension reflectance rectal canine