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
A 66-year-old man is brought to the emergency department because of fever, chills, and altered mental status for 3 days. According to his daughter, he has had a productive cough during this period. He has type 2 diabetes, hypertension, hypercholesterolemia, peripheral neuropathic pain, and a history of deep vein thromboses. Current medications include insulin, lisinopril, atorvastatin, warfarin, and carbamazepine. He is oriented only to self. His temperature is 39.3°C (102.7°F), pulse is 110/min, respirations are 26/min, and blood pressure is 86/50 mm Hg. Physical examination shows ecchymoses on both lower extremities. Crackles are heard at the right lung base. Laboratory studies show:
Hemoglobin 11.1 g/dL
Leukocyte count 18,000/mm3
Platelet count 45,000/mm3
Prothrombin time 45 sec
Partial thromboplastin time 75 sec
Serum
Na+ 135 mEq/L
K+ 5.4 mEq/L
Cl- 98 mEq/L
Urea nitrogen 46 mg/dL
Glucose 222 mg/dL
Creatinine 3.3 mg/dL
Which of the following is the most likely cause of this patient's ecchymoses?"
assistant
Disseminated intravascular coagulation