The patient has a homocysteine level ordered. What should the nurse know about laboratory results for homocysteine levels? (Mark all that apply.)
A) A 12-hour fast is necessary before drawing the blood sample.
B) A diet low in vitamin B6 can depress homocysteine levels.
C) Genetic factors can elevate homocysteine levels.
D) A diet low in folic acid elevates homocysteine levels.
E) An 8-hour fast is necessary before drawing the blood sample.
Ans: A, C, D
Feedback: Genetic factors and a diet low in folic acid, vitamin B6, and vitamin B12 are associated with elevated homocysteine levels. A 12-hour fast is necessary before drawing a blood sample for an accurate serum measurement. This makes options B and E incorrect.
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