Pulmonary function in the horse during anaesthesia: a review.

This research study reviews the impact of unusual positioning on a horse’s cardiovascular and pulmonary functions when awake and under anesthesia. Various parameters – pulmonary shunt, lung volumes, blood gases, and alveolar-arterial oxygen partial pressure differences – are considered, with suggestions for improving outcomes during anesthesia and recovery.

The impact of Body Positioning on Cardiovascular and Pulmonary Functions

• In this review, the authors have delved into studying the effect of abnormal body position on horses’ cardiovascular and pulmonary function during two states – when awake and during anaesthesia. The association between body position and its influence on essential physiological functions could potentially impact treatment plans and recovery for horses during veterinary procedures.

Key Parameters Under Review

• The research looks into various parameters encompassing pulmonary shunt, lung volumes, blood gases, and alveolar-arterial oxygen partial pressure differences. These are integral elements when studying the impact on the cardiovascular and pulmonary systems. Identification of these parameters allows for precise measurements and analysis, leading to a comprehensive understanding of the effects.

Improving Blood Gas values during Anaesthesia

• From the reviewed literature and their research, the authors suggest implementing specific measures to enhance blood gas values, especially when abnormal recumbency is present during anaesthesia. Notably, withholding food for 24 hours and using mechanical ventilation are suggested as beneficial practices. This could minimise any negative effects or risks linked with abnormal recumbency, ensuring smooth anaesthesia processes.

Recommended recovery Position

• In case of extended recovery after anaesthesia, the authors advocate that horses should be persuaded to assume sternal recumbency, a position where the horse lies with the chest against the ground. They argue that such a position could foster better recovery, likely due to the potential improvements it offers for respiratory and cardiovascular functions post-anaesthesia.