Inhalational Agents

Question 1

What is inhalational anaesthesia

Answer 1

Delivery of gases or vapors through respiratory system to produce reversible loss of consciousness , analgesia and or muscle relaxation

Question 2

2 gas that can produce surgical anaesthesia

Answer 2

Nitrous oxide
Xenon

Question 3

What is MAC - minimum alveolar concentration

Answer 3

Minimum alveolar concentration required at 1 atmospheric pressure to prevent movement when exposed to noxious stimuli
The lowest the more potent the IA and therefore more lipid soluble

Question 4

Factors which increase MAC

Answer 4

Decreasing age
Pyrexia
Thyrotoxicosis
Chronic alcohol ingestion
Ephedrine , amphetamine
Ethnicity

Question 5

Factor which decrease MAC

Answer 5

Sédative , analgesic
Increasing age
Nitrous oxide
Drugs
Hypotension
Hypothermia
Myxoedema
Pregnancy
High atmospheri pressure

Question 6

Idéal inhalational agent

Answer 6

Pleasant odor
Non irritant
Potent
Fast recovery
Stanle
Non flammable, explosive
Non toxic, allergic
CVS, RSdepressednon
Easy to administer
Non epileptogenic

Question 7

Characteristic of halothane

Answer 7

Colorless liquid
Pleasant smell
Red label
MAC 0.75%
Slow uptake and recovery