The correct puncture site is in the deepest point of the jugular groove formed between the medial sternocephalic and lateral brachiocephalic muscles. This site is marked on the picture by a black dot. Right-handed operators will usually find it easiest to use the animal's right jugular vein. A vacuum tube has been connected, and the needle inserted in its full length. This is important, since these needles are really slightly too short for large sows, and the adipose tissue above the vein must therefore be compressed somewhat.
Blood is seen entering the glass tube.
This picture shows the same situation as in the previous illustration, but the picture has been taken diagonally from in front. The jugular groove is easily seen. In order to illustrate the technique as well as possible, the needle holder is only held in place on this picture and the previous one by the operator's forefinger. In reality this holder should be held more firmly. It is vital that the needle holder is held firmly if the operator wishes to change vacuum tubes.