When the doctor/nurse takes blood from you, why do they try to find a vein, not an artery? And also why is this mainly done on the arm as opposed to other parts of the body?
In: Biology
Pressure
Vein pressure is low and arterial pressure is high.
Drawing blood from a low pressure vein and leaving an IV catheter is safe for several days. Leaving a catheter in an artery requires a hook up to keep back pressure on the system so you don’t bleed out.
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