04 - maintaining anesthesia

Question 1

(maintaining anesthesia)

1. inhalant anesthesia can be used following induction of anesthesia with IV agents
2. likely to be used for procedures longer than 1 hour in duration
3. cardiac output reduced by up to 50% of baseline values when inhalant anesthetic agents are used
4. all inhalants cause mild hypercarbia (^CO2 in blood) and resp depression

Question 2

(maintaining anesthesia)

1. horse has poorly lobulated lungs and a long, sloping diaphragm
2. makes large portion of lung vulnerable to compression by bulky intestinal tract when in any position other than standing
3. vetinlation-perfusion mismatch is common in horse under anesthesia
4. if kept standing lung fxn remains normal

Question 3

(maintaining anesthesia)

(inhalant anesthetics)

1. include halothane, isoflurane, sevoflurane
2. why isn’t nitrous oxide used much in horse?

Answer 3

2. potency less in horses and arterial hypoxemia and diffusion hypoxia limit usefullness