Which technique best dilates a vein for venipuncture?
a. Elevate the extremity for 5 minutes.
b. Apply a cool compress for 15 minutes.
c. Apply a tourniquet for up to 3 minutes.
d. Apply an alcohol swab for 60 seconds.
ANS: C
A tourniquet will impede venous flow and dilate the vein. Elevation or a cool compress will make a vein less visible. Alcohol cleans the skin.
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