(9) With the needle bevel up, parallel to, and alongside the vein, insert the
needle quickly under the skin and then into the vein. The insertion into the skin and
vein can be performed in one complete motion (see figure 3-2d). After entry into the
vein, blood will appear in the needle hub. Do not probe or move the needle horizontally,
as discomfort and possible nerve damage may result.
Figure 2-3d. Venipuncture procedure: Insert needle into the vein.
(10) Aspiration of the blood is accomplished by gently pulling upon the
syringe plunger (see figure 3-2e). The syringe barrel should be held steady during this
process. Withdraw the desired quantity.
Figure 3-2e. Venipuncture procedure: Aspirate the blood.
(11) Remove the tourniquet by pulling on the long, looped end of the tubing
only after blood is drawn into the syringe (see figure 3-2f).
Figure 3-2f. Venipuncture procedure: Remove the tourniquet.