system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Two hours after undergoing laparoscopic roux-en-Y gastric bypass surgery, a 44-year-old man complains of pain in the site of surgery and nausea. He has vomited twice in the past hour. He has hypertension, type 2 diabetes mellitus, and hypercholesterolemia. Current medications include insulin, atorvastatin, hydrochlorothiazide, acetaminophen, and prophylactic subcutaneous heparin. He drinks two to three beers daily and occasionally more on weekends. He is 177 cm (5 ft 10 in) tall and weighs 130 kg (286 lb); BMI is 41.5 kg/m2. His temperature is 37.3°C (99.1°F), pulse is 103/min, and blood pressure is 122/82 mm Hg. Examination shows five laparoscopic incisions with no erythema or discharge. The abdomen is soft and non-distended. There is slight diffuse tenderness to palpation. Bowel sounds are reduced. Laboratory studies show:
Hematocrit 45%
Serum
Na+ 136 mEq/L
K+ 3.5 mEq/L
Cl- 98 mEq/L
Urea nitrogen 31 mg/dL
Glucose 88 mg/dL
Creatinine 1.1 mg/dL
Arterial blood gas analysis on room air shows:
pH 7.28
pCO2 32 mm Hg
pO2 74 mm Hg
HCO3- 14.4 mEq/L
Which of the following is the most likely cause for the acid-base status of this patient?"
assistant
Hypoxia