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NBME 18 Answers

nbme18/Block 2/Question#8

39 yo man, polycystic kidney disease

pH: 7.22; PCO2: 28; HCO2: 11

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submitted by banana(2),

Or, if you can never remember MUDPILES: + he is way in renal failure: metabolic acidosis. + respiration 24/min: resp compensation, low CO2 + HCO3 is low (^^renal failure)

Uremia: part of MUDPILE

hence you develop metabolic acidosis --> LOW bicarb with DEC. pH and you develop respiratory alkalosis in response

Uremia = Metabolic acidosis = Bicarb is low. High respiration = Low Co2; for respiratory compensation.

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submitted by sammyj98(6),

did anybody else second guess the heck out this answer just because he's got a pH of 7.2 and he's hanging out in an outpatient clinic? I haven't done my clinicals yet but it seems like this guy would be struggling..

myoclonictonicbionic  EXACTLY... 7.2 for 6 months without any drastic symptoms.. that doesn't sound right +