Validity of pulse oximetry during maximal exercise in normoxia, hypoxia, and hyperoxia

During exercise, pulse oximetry is problematic due to motion artifact and altered digital perfusion. New pulse oximeter technology addresses these issues and may offer improved performance. We simultaneously compared Nellcor N-395 (Oxismart XLTM) pulse oximeters with an RS-10 forehead sensor (RS-10)...

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Vydané v:Journal of applied physiology (1985) Ročník 92; číslo 1; s. 162
Hlavní autori: Yamaya, Yoshiki, Bogaard, Harm J, Wagner, Peter D, Niizeki, Kyuichi, Hopkins, Susan R
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: United States 01.01.2002
Predmet:
Adult
Algorithms
Bicycling - physiology
Blood Gas Analysis
Electrocardiography - drug effects
Exercise - physiology
Female
Heart Failure - physiopathology
Heart Rate - drug effects
Humans
Hypoxia - blood
Male
Oximetry - standards
Oxygen - blood
Oxygen Consumption - drug effects
Physical Fitness - physiology
Pulmonary Disease, Chronic Obstructive - physiopathology
Reproducibility of Results
ISSN:8750-7587
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Shrnutí:During exercise, pulse oximetry is problematic due to motion artifact and altered digital perfusion. New pulse oximeter technology addresses these issues and may offer improved performance. We simultaneously compared Nellcor N-395 (Oxismart XLTM) pulse oximeters with an RS-10 forehead sensor (RS-10), a D-25 digit sensor (D-25), and the Ivy 2000 (Masimo SETTM)/LNOP-Adt digit sensor (Ivy) to arterial blood oxygen saturation (Sa(O(2))) by cooximetry. Nine normal subjects, six athletes, and four patients with chronic disease exercised to maximum oxygen consumption (VO(2 max)) under various conditions [normoxia, hypoxia inspired oxygen fraction (FI(O(2))) = 0.125; hyperoxia, FI(O(2)) = 1.0]. Regression analysis for normoxia and hypoxic data was performed (n = 161 observations, Sa(O(2)) = 73-99.9%), and bias (B) and precision (P) were calculated. RS10 offered greater validity than the other two devices tested (y = 1.009x - 0.52, R(2) = 0.90, B+/-P = 0.3 +/- 2.5). Finger sensors had low precision and a significant negative bias (D-25: y = 1.004x - 2.327, R(2) = 0.52, B+/-P = -2.0 +/- 7.3; Ivy: y = 1.237x - 24.2, R(2) = 0.78, B+/-P = -2.0 +/- 5.2). Eliminating measurements in which heart rate differed by >10 beats/min from the electrocardiogram value improved precision minimally and did not affect bias substantially (B+/-P = 0.5 +/- 2.0, -1.8 +/- 8.4, and -1.25+/-4.33 for RS-10, D-25, and Ivy, respectively). Signal detection algorithms and pulse oximeter were identical between RS-10 and D-25; thus the improved performance of the forehead sensor is likely because of sensor location. RS-10 should be considered for exercise testing in which pulse oximetry is desirable.
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ISSN:8750-7587
DOI:10.1152/japplphysiol.00409.2001