EDAIC MCQ (Multiple Choice Question) and answer. FREE UPLOADS BY WWW.TARGETEDAIC.COM (82)

The section, EDAIC MCQ (Multiple Choice Question) and answer, covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.

Question: True statements regarding desflurane

• the following represents its true structure

• The saturated vapour pressure at room temperature (20 degrees C) is 88.5 mmHg
• The temperature inside the desflurane vaporizer is 39 degrees C, which produces a vapour pressure of around 1550 mmHg.
•  It sensitises the myocardium to circulating catecholamines.
• 0.002% is metabolised, predominantly to trifluoroacetic acid

Answers:

1. 1. True
   2. False
   3. True
   4. False
   5. False

Explanation:

explanation:

• desflurane is a halogenated ether with the following structure
• 
• SVP at 20 degrees celsius: 88.5 kPa  (87% of one atmosphere). This means that desflurane is nearly boiling at room temperature
• Desflurane vaporise heats the agent to 39 degrees C, which produces a vapour pressure of around 1550 mmHg
• CVS effects:
  • Causes a decrease in myocardial contractility, but the sympathetic tone is well preserved.
  • Does not sensitise the myocardium to circulating catecholamines.
  • Causes a dose-dependent decrease in systemic vascular resistance, thus leading to a decrease in mean arterial pressure.
  • Heart rate may increase via an indirect autonomic effect.
  • Does not cause ‘coronary steal’.
• 0.02% is metabolised, predominantly to trifluoroacetic acid.

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‘EDAIC MCQ (Multiple Choice Question) and answer’ covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.