As a healthcare professional with expertise in phlebotomy, I can provide you with information on the common veins used for drawing blood. The choice of vein depends on several factors, including the patient's age, the size and visibility of the veins, the volume of blood needed, and the type of test being conducted.

In adults, the most commonly used veins for blood draws are:


1. Median Cubital Vein: Located on the inside of the elbow, it is often the first choice due to its size and accessibility. However, it can collapse or roll when pressure is applied, making it difficult to draw blood.


2. Cephalic Vein: This vein runs from the forearm to the shoulder and is visible when the arm is extended. It's a good alternative if the median cubital vein is not suitable.


3. Basilic Vein: Found on the inner side of the arm, it can be used if the other veins are not accessible or visible.


4. Dorsal Venous Arch: Located on the back of the hand, it is often used in children or when other veins are not available.

In children, the Dorsal Venous Arch is preferred due to its accessibility and because it is less likely to cause distress to the child.

In infants, the Temporal Vein on the side of the head may be used, but this requires a skilled phlebotomist due to the delicate nature of the procedure.

It's important to note that the success of drawing blood can be influenced by factors such as the patient's hydration level, the use of a tourniquet, and the phlebotomist's technique.

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Blood is most commonly obtained from the superficial veins of the upper limb. The median cubital vein, which lies within the cubital fossa anterior to the elbow, is close to the surface of the skin without many large nerves positioned nearby.read more >>