Anaesthesia for Veterinary Nurses by Elizabeth Welsh (ed.)

By Elizabeth Welsh (ed.)

Sedation and anaesthesia are a vital a part of veterinary perform. The protocols and techniques concerned are usually advanced and fluctuate significantly from animal to animal. The veterinary nurse has a pivotal position in anaesthesia, being at once concerned ahead of, in the course of and after the anaesthetic interval.

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LIVER The liver is important in anaesthesia for a number of reasons. Drug transport Many anaesthetic agents such as thiopentone are transported in the bloodstream bound to albumin, a protein produced by the liver. Liver disease may cause decreased levels of albumin in the bloodstream (hypoalbuminaemia) and consequently a greater proportion of thiopentone will be free and active in the circulation. Thus animals with low albumin levels may require reduced doses of anaesthetic agents. Drug metabolism Anaesthetic agents can directly affect the blood supply to the liver.

During diastole blood pressure will be at its lowest. Normal blood pressure in the dog is 120/70 mmHg and 140/90 mmHg in the cat. It is important that blood pressure is maintained within this normal range. Systemic arterial pressure (arterial blood pressure) is determined by cardiac output (predominantly controlled by the heart) and resistance to flow (predominantly controlled by the blood vessels). Baroreceptors are present in numerous sites throughout the cardiovascular system including the carotid sinus, aortic arch, walls of the left and right atria, left ventricle, and pulmonary circulation.

G. case number, in addition to general information such as species. (2) Confi rm age of patient. Both very young and geriatric (≥ 75–80% of life span) patients are more susceptible to the effects of anaesthetics. (3) Breed: Many owners of purebred animals are concerned about breed sensitivities to selected anaesthetic drugs. Currently, there is little scientific information to support these fears although many breed websites perpetuate the concerns. However, it is important to consider disease susceptibility in specific breeds, for example, von Willebrand’s disease in the Dobermann pinscher.

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