Collection ProceduresQuestion 5 of 100
At what angle to the skin should the needle be inserted for a routine antecubital venipuncture?
a.5 degrees or less
b.45 to 60 degrees
c.15 to 30 degrees
d.90 degrees
Explanation
A 15 to 30 degree angle allows the bevel to enter the vein lumen without passing through the far wall. An angle that is too shallow causes the needle to ride on top of the vein and fail to enter; an angle of 45 degrees or more risks going through the vein and into underlying structures. A 90 degree insertion is used for dermal puncture devices, not for venipuncture.
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