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Question 1
What is the preferred venipuncture site for routine blood draws in adults?
Answer: The median cubital vein in the antecubital fossa is the preferred site because it is large, well-anchored, and close to the surface.
Question 2
Why is the basilic vein considered the least preferred antecubital vein for venipuncture?
Answer: The basilic vein is least preferred because it is poorly anchored, rolls easily, and lies near the brachial artery and median cutaneous nerve, increasing the risk of complications.
Question 3
At what angle should the needle be inserted for a standard antecubital venipuncture?
Answer: The needle should be inserted at a 15- to 30-degree angle, bevel up, aligned with the vein.
Question 4
Which condition of a vein indicates it is suitable for venipuncture?
Answer: A suitable vein feels soft, bouncy, and resilient when palpated, and refills promptly after pressure is applied.
Question 5
What is a 'sclerosed' vein and how does it affect venipuncture?
Answer: A sclerosed vein is hardened and scarred from repeated punctures or disease; it should be avoided because it is difficult to enter and may not yield an adequate sample.