Sinopsis
Blood collection from a vein is a routine procedure commonly performed during patient evaluation. Many diagnostic tests require whole blood or serum. Often, specific additives are necessary in blood collection tubes to prevent coagulation.
Venipuncture of the External Jugular Vein The external jugular vein is most accessible and is found easily within the jugular groove along the ventral aspect of the neck. The vein can be safely accessed in the cranial half of the neck where muscle (omohyoideus muscle) interposes between the vein and the underlying carotid sheath containing the carotid artery. The vein fills most rapidly if distended by digital pressure just below the intended venipuncture site. Stroking the vein distally causes motion waves higher up, which is helpful if the distended vein is not readily visible.
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