For individuals living with kidney failure, dialysis serves as a life-sustaining treatment that replicates the filtration function of healthy kidneys. To perform this therapy effectively, medical teams require a reliable entry point into the bloodstream, known as dialysis access. This surgically created site permits the rapid removal and return of blood to the body during sessions. Because standard veins cannot support the high blood flow volume needed for the artificial kidney to work, creating a durable access point is a foundational step in managing advanced kidney disease.
What Is Dialysis Access?
Dialysis access establishes a connection between the patient’s circulation and the dialysis machine. During treatment, the machine draws blood from the body, cycles it through a dialyzer to remove waste products and excess fluid, and returns the cleansed blood to the patient. This continuous loop requires a rate of blood flow that normal veins cannot withstand over long periods. Vascular specialists create a few primary types of access to handle this demand:
- Arteriovenous (AV) Fistula: This is often the preferred choice for long-term access. A surgeon connects an artery directly to a nearby vein, typically in the arm.
- Arteriovenous (AV) Graft: If a patient’s veins are too small or weak to support a fistula, surgeons may use an AV graft. This method involves implanting a soft, synthetic tube under the skin to link an artery and a vein.
How Is Access Created?
The creation of dialysis access involves specific surgical procedures performed by a vascular specialist. To create an AV fistula, the surgeon makes an incision in the arm to expose the target artery and vein. These vessels are then sewn together to redirect blood flow.
Placing an AV graft involves a similar surgical approach. The surgeon makes two small incisions and tunnels the synthetic tube under the skin to connect the artery and vein. Like the fistula procedure, this is often done under local anesthesia. Although grafts do not need to mature like natural veins, the surgical site requires time to heal.
What Are the Benefits?
A functioning dialysis access makes efficient toxin removal possible, stabilizing the patient’s health. The choice of access type balances benefits against potential risks. AV fistulas offer the greatest longevity and durability. Since they consist of the patient’s own tissue, they resist infection and clotting better than other options. A well-maintained fistula can function for years or even decades, reducing the need for repeat interventions.
AV grafts provide a dependable option when a fistula is not feasible. They offer a sturdy access point that matures quickly, allowing patients to begin treatment relatively soon after surgery. While they may require more maintenance, they remain a solid choice for long-term therapy.
Meet With a Vascular Specialist
Consulting a vascular specialist is the first step toward establishing a reliable dialysis access. These surgeons possess the expertise to evaluate your vascular health through physical exams and ultrasound mapping. Regular follow-up with your specialist helps identify and address potential issues early, supporting the ongoing effectiveness and safety of your access site.
