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Pulse Oximetry in Horses
Author(s) -
WHITEHAIR KAREN J.,
WATNEY GUY C. G.,
LEITH DAVID E.,
DEBOWES RICHARD M.
Publication year - 1990
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.1990.tb01179.x
Subject(s) - medicine , pulse oximetry , tongue , saturation (graph theory) , hemoglobin , standard deviation , mean difference , nuclear medicine , limits of agreement , anesthesia , cardiology , pathology , confidence interval , mathematics , statistics , combinatorics
The clinical usefulness of two pulse oximeters was evaluated at two probe sites in nine anesthetized horses. The hemoglobin saturation determined by the pulse oximeters (SaO 2 ) was compared with the hemoglobin saturation calculated from the measured arterial oxygen tension (SaO 2 )‐The mean and standard deviation (SD) were calculated from the differences in saturation measurements, over the saturation range of 80% to 100%, for each oximeter used at the tongue probe site and for one oximeter used at the ear. The oximeter results tended to underestimate the SO 2 with mean differences of ‐3.7% on the tongue and ‐6.0% on the ear. The limits of agreement were defined as the mean difference ± 2 SD. Each oximeter used at the tongue produced limits of agreement of +1% to ‐8%, which meant that 95% of the SaO 2 values were 1 percentage point above or 8 percentage points below the SaO 2 . The variability of the differences and limits of agreement were larger when the ear was used as the probe site and at saturations less than 80%. Although both oximeters tended to underestimate the SaO 2 , they appeared to be clinically useful in detecting changes in arterial hemoglobin saturation.