Urine has a high creatinine value, while body fluids tend to have levels comparable to that of serum.
ratio of fluid creatinine-to-serum creatinine =
= (body fluid creatinine in mg/dL) / (serum creatinine in mg/dL)
Type of Fluid
ascites or pleural fluid
Features of urine compared to other body fluids:
(1) high creatinine
(2) high urea
(3) high potassium
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Purpose: To distinguish urine from ascitic or pleural fluid.
Specialty: Hematology Oncology, Clinical Laboratory, Pulmonology, Surgery, general, Nephrology
Objective: laboratory tests
ICD-10: J98.4, N18.9,