Inhaled anaesthetics

Question 1

Speed of onset of agents?

Answer 1

1. B/G partition coefficient
2. Fi
3. Ventilation
4. Cardiac output

Question 2

BG partition coefficient of volatile agents ?

Answer 2

1. Desflurane = 0.42
2. Nitrous = 0.47
3. Sevoflurane = 0.64
4. Isoflurane = 1.4
5. Halothane = 2.4

Question 3

Potency ?

Answer 3

It is a function of MAC

Question 4

Vapour pressure ?

Answer 4

1. Concentration increases with increasing altitude due to decrease in atmospheric pressure

Question 5

Dalton’s law?

Answer 5

In a mixture of gases partial pressure of individual gases behave as if they are alone

Question 6

Vaporisers?

Answer 6

Its possible to use isoflurane vaporiser for Halothane as they have similar SVP