Examen Integrado Bioquímica Practice Questions - Examen Integrado De Residencias De La Salud - Bioquímica (Argentina) Exam

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A fasting lipid panel reveals: Total Cholesterol = 240 mg/dL, HDL-C = 45 mg/dL, and Triglycerides = 200 mg/dL. What is the estimated LDL-C using the Friedewald equation, and in which scenario is this formula INVALID?

LDL-C = 155 mg/dL; the formula is invalid when serum triglycerides exceed 400 mg/dL or chylomicrons are present LDL-C = 195 mg/dL; the formula is invalid when total cholesterol exceeds 200 mg/dL LDL-C = 135 mg/dL; the formula is invalid when HDL-C is below 50 mg/dL LDL-C = 165 mg/dL; the formula is invalid only when the patient has not fasted for at least 24 hours

Correct Answer:

LDL-C = 155 mg/dL; the formula is invalid when serum triglycerides exceed 400 mg/dL or chylomicrons are present

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