Ringing in his ears (tinnitus) combined with mixed metabolic acidosis-respiratory alkalosis is hallmark of aspirin overdose (salicylate poisoning) [FA2020 p486]
He is in metabolic acidosis (his HCO3- is also low)
He is in respiratory alkalosis (his PaCO2 is low)
You might be thinking - is the PCO2 low because compensation?
Use Winter's formula: PCO2 = 1.5(HCO3-)
+ 8 (+ or - 2)
1.5(19)+8 = 36.5 so he should have a PCO2 34.5 to 38.5
His PCO2 is 30 so he has cocominant respiratory alkalosis.
submitted by โcassdawg(1780)
Ringing in his ears (tinnitus) combined with mixed metabolic acidosis-respiratory alkalosis is hallmark of aspirin overdose (salicylate poisoning) [FA2020 p486]
You might be thinking - is the PCO2 low because compensation?
Use Winter's formula: PCO2 = 1.5(HCO3-) + 8 (+ or - 2)
1.5(19)+8 = 36.5 so he should have a PCO2 34.5 to 38.5
His PCO2 is 30 so he has cocominant respiratory alkalosis.
[Acid base and Winter's equation FA2020 p592]