PMID: 12889721Aug 2, 2003

Accuracy of pulse oximetry and capnography in healthy and compromised horses during spontaneous and controlled ventilation

Canadian Journal of Veterinary Research = Revue Canadienne De Recherche Vétérinaire
Judith KoenigAlexander Valverde


The objective of this prospective clinical study was to evaluate the accuracy of pulse oximetry and capnography in healthy and compromised horses during general anesthesia with spontaneous and controlled ventilation. Horses anesthetized in a dorsal recumbency position for arthroscopy (n = 20) or colic surgery (n = 16) were instrumented with an earlobe probe from the pulse oximeter positioned on the tip of the tongue and a sample line inserted at the Y-piece for capnography. The horses were allowed to breathe spontaneously (SV) for the first 20 min after induction, and thereafter ventilation was controlled (IPPV). Arterial blood, for blood gas analysis, was drawn 20 min after induction and 20 min after IPPV was started. Relationships between oxygen saturation as determined by pulse oximetry (SpO2), arterial oxygen saturation (SaO2), arterial carbon dioxide partial pressure (PaCO2), and end tidal carbon dioxide (P(et)CO2), several physiological variables, and the accuracy of pulse oximetry and capnography, were evaluated by Bland-Altman or regression analysis. In the present study, both SpO2 and P(et)CO2 provided a relatively poor indication of SaO2 and PaCO2, respectively, in both healthy and compromised horses, especially durin...Continue Reading

Related Concepts

General Anesthesia
Arthroscopic Surgical Procedures
Blood Gas Analysis
Carbon Dioxide
Infantile Colic
Horse Diseases
Oximetry, Pulse
Regression Analysis
Expiratory Airflow

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