Answer: tree tpes of viens
The three most commonly used veins for drawing blood are the median cubital, the cephalic, and the basilic veins.
Explanation:
The first step in drawing blood correctly is to identify the appropriate veins to puncture. For adult patients, the most common and first choice is the median cubital vein in the antecubital fossa. Commonly referred to as the antecubital or the AC it can be found in the crevice of the elbow between the median cephalic and the median basilic vein.
This is an extremely large vessel and if stuck properly can yield excellent blood results. Some health care settings may insert blood drawing peripheral intravenous catheters into this vessel for frequent blood draws. For novice phlebotomists, this vein is the first choice because it is close to the skin’s surface and tends not to roll when punctured. Furthermore, it has a low risk of damaging surrounding nerves, arteries, and tendons versus other veins in the hands.
Learning the anatomy of the main veins and arteries in the body is essential to becoming competent in phlebotomy. If the antecub has already been accessed there are great options for venipuncture.
Other commonly used veins include:
basilic vein
cephalic vein
Avoid Puncturing These Areas
While it is important to know the best veins to access it’s also important to know which areas to avoid.
These areas include:
Edematous sites (swollen sites filled with serous fluid)
Scarred or burned areas
Fistulas and grafts
Hematomas
From an IV cannula (unless permitted by your institution)
Sites above an IV cannula in the same vessel
Arm with PICC line
Arm with a preexisting or current blood clot
Arm on side of a mastectomy
Via an open wound or area of infection
Arm in which blood is being transfused
Arm on the side of a surgical procedure
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