Use of continuous positive airway pressure (CPAP) to optimise oxygenation in anaesthetised horses--a clinical study

Equine Veterinary Journal
Martina MosingP MacFarlane

Abstract

Hypoxaemia is a common problem during equine anaesthesia. Continuous positive airway pressure (CPAP) is a ventilation mode routinely employed in man to overcome hypoxaemia but has not been objectively assessed in horses. To test the effects of CPAP on oxygenation and its indices in anaesthetised horses in a clinical setting. Twenty-four healthy horses requiring anaesthesia in dorsal recumbency were anaesthetised using a standard protocol. Following orotracheal intubation and connection to an anaesthetic machine capable of applying CPAP, horses were randomly allocated to ventilate at physiological airway pressure measured at the airway opening (Group PAP) or to receive CPAP of 8 cmH2O (Group CPAP). Arterial blood gas analysis was performed as soon as arterial cannulation was achieved and 30, 60 and 90 min after induction. If PaCO2 increased above 9.31 kPa controlled ventilation was initiated. Groups were compared using a general linear model. Horses receiving CPAP had significantly higher PaO2 and calculated oxygen indices than horses receiving PAP. No significant differences in ventilation indices were observed between the 2 groups. Eight horses receiving PAP and 5 receiving CPAP required controlled ventilation. No differences ...Continue Reading

References

Aug 1, 1975·British Journal of Anaesthesia·L W Hall, C M Trim
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Jan 1, 1980·Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology·P R Sorenson, N E Robinson
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Sep 23, 2003·Veterinary Anaesthesia and Analgesia·Veronika H Olbrich, Martina Mosing
Feb 16, 2006·Veterinary Anaesthesia and Analgesia·Elisabeth N LeibetsederRonald S Jones
Apr 21, 2007·Veterinary Anaesthesia and Analgesia·Andrey L YershovMichael A Dubick
Nov 10, 2009·Behavior Research Methods·Franz FaulAlbert-Georg Lang
Dec 19, 2009·Current Opinion in Anaesthesiology·Paolo Pelosi, Samir Jaber
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Citations

Mar 22, 2016·Veterinary Medicine International·C G DonnellyS L Raidal
Aug 16, 2014·Journal of Veterinary Emergency and Critical Care·Francesco StaffieriSalvatore Grasso
Mar 13, 2014·Equine Veterinary Journal·J A E Hubbell, W W Muir
Oct 30, 2015·Equine Veterinary Journal·H van OostromJ P A M van Loon
May 3, 2019·Journal of Veterinary Emergency and Critical Care·Sharanne L RaidalChristopher T Quinn
Dec 25, 2019·Journal of Veterinary Emergency and Critical Care·Gianila CeccheriniAngela Briganti

Related Concepts

General Anesthesia
Blood Gas Analysis
Carbon Dioxide
Dioxygen
Respiratory Function Tests
Nasal Continuous Positive Airway Pressure
Anesthesia Procedures
Anesthetics
Arteries
Clinical Research

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