During dialysis the impure blood is collected from artery of a patient...
Why is impure blood collected from arteries during dialysis?
Dialysis is a medical treatment used to remove waste and excess water from the blood of patients with kidney failure. During dialysis, impure blood is collected from the patient's artery, rather than their vein. This is because:
Arteries carry blood away from the heart
Arteries are the blood vessels that carry oxygen-rich blood away from the heart to the rest of the body. This means that the blood in the arteries is under much higher pressure than the blood in the veins, which carry blood back to the heart. By collecting blood from an artery, the dialysis machine is able to more effectively remove waste products and excess water from the patient's blood.
Arteries have a larger diameter than veins
The diameter of an artery is larger than that of a vein, which makes it easier to insert a needle for the purpose of collecting blood. In addition, arteries are located closer to the surface of the skin than veins, which makes them more accessible for the dialysis procedure.
Veins can become damaged over time
Patients who require dialysis often have weakened veins due to the frequent insertion of needles and the use of medications. Over time, veins can become damaged or collapsed, making it more difficult to collect blood for dialysis. By collecting blood from an artery instead, the risk of damage to the veins is reduced.
Conclusion
In conclusion, impure blood is collected from arteries during dialysis because they carry blood away from the heart, have a larger diameter, and are less prone to damage than veins. By using arteries for blood collection, dialysis machines are able to more effectively remove waste products and excess water from the patient's blood, helping to improve their overall health and well-being.