What is the purpose of heparin during hemodialysis?

Heparin plays a crucial role in hemodialysis by preventing blood clotting during the dialysis session. When blood is circulated through the dialysis machine, it is necessary to keep it flowing effectively to ensure that waste products and excess fluid are removed from the blood. Since the blood is exposed to the artificial surface of the dialysis machine, there is a risk of clot formation, which could lead to complications and hinder the treatment process.

By administering heparin, a powerful anticoagulant, healthcare providers can inhibit the clotting mechanisms in the blood, facilitating a smooth flow throughout the dialysis procedure. This action helps maintain the efficiency of the dialysis process, ensuring that the patient's blood is adequately filtered and treated without interruption due to clot formation.

Other options do not align with the primary function of heparin. It is not intended to relieve pain, provide nutrients, or regulate blood pressure directly within the context of dialysis treatments. The focus of heparin is specifically on the prevention of clotting to enhance the safety and effectiveness of hemodialysis.