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 laboratory technician processes basic metabolic panels for two patients. Patient A is 18 years old and patient B is 83 years old. Neither patient takes any medications regularly. Serum laboratory studies show:
Patient A Patient B
Na+ (mEq/L) 145 141
K+ (mEq/L) 3.9 4.4
Cl- (mEq/L) 103 109
HCO3- (mEq/L) 22 21
BUN (mg/dL) 18 12
Cr (mg/dL) 0.8 1.2
Glucose (mg/dL) 105 98
Which of the following most likely accounts for the difference in creatinine seen between these two patients?"
assistant
Normal aging