ABCP Board Exam Questions VERIFIED SOLUTIONS LATEST UPDATED 2023

Metabolic acidosis is characterized by: - ANSWER a fall in the plasma HCO3- concentration and a low pH The patient is a 71 year old male who presents to the OR with a history of congestive heart failure. His history is positive for increasing shortness of breath, 3 pillow orthopnea, lower extremity edema, and dyspnea with mild exertion. Preoperative lab values are as follows (Arterial values): pH: 7.41, pCO2: 60, pO2: 50, HCO3-: 38.1, BE + 12, SaO2: 72%, Hgb/Hct: 7.6/23 Based on the above information, you diagnose: - ANSWER chronic respiratory acidosis with fully compensated metabolic alkalosis and hypoxemia The patient is weaned from CPB and you get the results of the postoperative arterial blood gas. The results are: pH: 7.42, pCO2: 36, pO2: 95, HCO3-: 26, BE: -1, SaO2: 99%, Hgb/Hct: 8.6/26 Based on the above, your diagnosis is: - ANSWER normal ventilatory status and normal arterial blood gas values