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Venipuncture sites diagram12/30/2023 Where safety-engineered devices are not available, skilled use of a needle and syringe is acceptable. Annex B provides further information on infection prevention and control, safety equipment and best practice Annex C provides a comprehensive guide to devices available for drawing blood, including safety-engineered equipment.įor settings with low resources, cost is a driving factor in procurement of safety-engineered devices. Before selecting a safety-engineered device, users should thoroughly investigate available devices to determine their appropriate use, compatibility with existing phlebotomy practices, and efficacy in protecting staff and patients ( 12, 33). Not all safety devices are applicable to phlebotomy. However, the use of such devices should be accompanied by other infection prevention and control practices, and training in their use. Several safety-engineered devices are available on the market such devices reduce exposure to blood and injuries. The median cubital vein, a superficial vein that forms a connection point between the cephalic and basilic veins of the arm is large, and therefore. Several veins in the antecubital fossa provide excellent access. decanting blood to recycle laboratory tubes). The most commonly used site for a venipuncture is at the bend of the elbow, also called the antecubital fossa. At times, this innermost layer folds to form one-way valves to prevent the blood flowing backward.Make available sufficient laboratory sample tubes to prevent dangerous practices (e.g. A superficial vein, most commonly used for venipuncture, it lies over.It’s a single layer of endothelial cells and some connective tissue. Method and Apparatus For Venipuncture Site Location - diagram. Tunica intima: It the innermost layer. Method and Apparatus For Venipuncture Site Location - diagram, schematic, and image 06. Vasodilation or vasoconstriction occurs to adjusts the diameter of the lumen It is under the control of the sympathetic nervous system. Smooth muscle cells along with elastic tissue. Tunica media: Tunica media is the middle layer and it contains of smooth muscle cells and collagen.Tunica adventitia : It is the outer layer and it is mostly made up of connective tissue. .Veins and arteries consist of three main layers: The blood in the superficial veins flows slower than blood in the deep veins. ĭeep veins runs through the muscles and the blood is forced toward the heart by the squeezing action of surrounding muscles. Superficial veins are close to the skin and are often visible to the eyes. Phlebotomy is done on the superficial veins for the extremities. Another suitable site for venipuncture is the dorsum (back). Please review the diagram on page 10, illustrating the major veins used for venipuncture. Upper and lower extremities are often used in neonates, children and sometimes in frail. Download scientific diagram Influence of wiping or not wiping alcohol at the site of venipuncture on potassium (1A), aspartate aminotransferase (AST) (1B), lactate dehydrogenase (LD) (1C), and. The difference between Arteries and Veins The upper extremities are the preferred sites for venipuncture in adults. It is imperative that the phlebotomist knows the anatomy of a vein and which are the best locations to select.Īrteries deliver oxygenated blood from the heart to the body and the veins return deoxygenated blood from the body back to the heart (except, the pulmonary vein).
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