q

Prep for USMLE Forum

» Log in | Register

Forum

Step 1

Match

Prep4USMLE Forum » USMLE Step 1 Forum » Pharmacology Forum

Author

7 Posts

star1
Forum Guru
avatar

Topics: 93
Posts: 827

05/29/06 - 01:25 PM

which of the following is likely to DECREASE the minimum alveolar concentration of an anesthetic ?

a) Hyperthermia b) Hypernatraemia c) Hyponatraemia d) Hypercapnia e) Thyrotoxicosis

mjl1717
Forum Hero
avatar

Topics: 958
Posts: 5,463

05/29/06 - 02:11 PM

my semi -educated guess is hyponatremia

___________________
Smell the coffee! "Is That an Osler move??"

star1
Forum Guru
avatar

Topics: 93
Posts: 827

05/29/06 - 02:19 PM

drpkaur
Forum Guru
avatar

Topics: 196
Posts: 810

05/29/06 - 03:58 PM

hyponatremia is the answer..

FACTORS THAT INCREASE MAC
Hyperthermia
Hypernatraemia
Sympathoadrenal stimulation
Chronic alcohol abuse
? Chronic opioid abuse
Increases in ambient pressure
Hypercapnia
Decreasing age
Thyrotoxicosis

FACTORS THAT DECREASE MAC
Nitrous oxide
Hypothyroid/myxoedema
Hypocapnia
Hypothermia-decrease is roughly linear
Hyponatraemia
Increasing age - (MAC Hal < 3 months ~ 1.1 % MAC Hal > 60 years ~ 0.64 %)
Hypoxaemia
Hypotension
Anaemia
Pregnancy
CNS depressant drugs - opioids,
benzodiazepines, major tranquilizers, TCA's
Other drugs - lithium, lidocaine, magnesium, methyl dopa, clonidine
Acute alcohol abuse

HILFIGER
Forum Senior

Topics: 22
Posts: 195

05/30/06 - 09:23 AM

Huge list, isn't it

Slacker
Forum Elite

Topics: 29
Posts: 141

05/30/06 - 09:58 AM

Is there a concept in this or r we just suppose to memorize this list????

nadiabarati

05/30/06 - 03:40 PM

same here!!!! Are we supposed to memorize the list???

You don't have permission to post.