A 30 y.o. female patient is undergoing hemodialysis with an internal arteriovenous fistula in place. What do you do to prevent complications associated with this device?
**Core Concept**
The internal arteriovenous fistula is a surgically created connection between an artery and a vein, used for hemodialysis. The primary goal is to prevent complications such as thrombosis, infection, and steal syndrome, while maintaining optimal blood flow and access for dialysis.
**Why the Correct Answer is Right**
To prevent thrombosis, anticoagulation with heparin is essential during dialysis sessions. This inhibits the conversion of prothrombin to thrombin, thereby reducing clot formation. Regular monitoring of the fistula's blood flow, pressure, and access site for signs of thrombosis or stenosis is also crucial. Additionally, maintaining a patent and well-functioning fistula requires careful management of blood pressure, fluid status, and avoiding activities that may cause venous hypertension.
**Why Each Wrong Option is Incorrect**
**Option A:** Avoiding anticoagulation would not prevent thrombosis; in fact, it would increase the risk of clot formation and fistula failure.
**Option B:** Simply monitoring the fistula without anticoagulation would not be sufficient to prevent thrombosis, as it would still be prone to clotting.
**Option C:** Restricting fluid intake may help prevent venous hypertension but is not a direct measure to prevent fistula thrombosis or other complications.
**Clinical Pearl / High-Yield Fact**
Regular monitoring and management of the arteriovenous fistula, including anticoagulation, blood pressure control, and patency assessment, are crucial to prevent complications and ensure optimal dialysis access.
**Correct Answer:** A. Heparin anticoagulation during dialysis sessions.