A 32-year-old man is admitted to the ED after taking an overdose of a tricyclic antidepressant drug. He's unconscious and breathing at a rate of 5 to 6 breaths/minute. His ABG values on room air are as follows: pH, 7.25
PaCO2, 61 mm Hg
PaO2, 74 mm Hg
HCO3-, 26 mEq/liter
SaO2, 89%
Determine the cause (s) of the acid-base disorder:
1. Disease, Disorder or Drug
2. (vital) Signs and Symptoms
3. CAUSE of abnormal CO2 OR HCO3 levels
4. Abnormal CO2 OR HCO3 levels
5. A/B Disorder