Dialysis Access: Fistulas, Grafts, and Catheter Care Explained

Stephen Roberts 28 December 2025 14 Comments

What Is Dialysis Access and Why Does It Matter?

If you’re on hemodialysis, your access point isn’t just a tube or a needle site-it’s your lifeline. Every time you sit down for treatment, blood flows out of your body, gets cleaned by the dialysis machine, and returns. That process only works if there’s a strong, reliable connection between your bloodstream and the machine. This connection is called dialysis access, and it comes in three main forms: arteriovenous (AV) fistulas, AV grafts, and central venous catheters.

Not all access types are created equal. The best option isn’t the one that’s easiest to put in-it’s the one that lasts longest, causes the fewest infections, and gives you the best chance to live well. That’s why doctors push so hard for fistulas. They’re not just preferred-they’re the gold standard.

AV Fistula: The Gold Standard for Long-Term Dialysis

An AV fistula is made by surgically connecting an artery directly to a vein, usually in your forearm. This isn’t a quick fix. It takes 6 to 8 weeks for the vein to grow bigger and stronger-this is called maturation. During that time, the vein thickens from the increased blood pressure coming from the artery. Once matured, it can handle the repeated needle sticks of dialysis without tearing or collapsing.

Why is this the best choice? Because fistulas last for decades when cared for properly. They have the lowest infection rates, the least clotting, and the lowest risk of death compared to other access types. Studies show that people using fistulas have 1.18 times lower risk of dying than those using grafts, and over 1.5 times lower risk than those using catheters. That’s not a small difference-it’s life-changing.

Patients who stick with fistulas often report fewer hospital visits and more freedom. One person in Texas told me his fistula has worked perfectly for seven years with nothing more than monthly checks. That’s the kind of reliability you want.

AV Graft: The Backup Plan When Veins Aren’t Strong Enough

Not everyone’s veins are healthy enough for a fistula. If you have small, weak, or scarred veins-common in people with diabetes or older adults-a graft is the next best option. A graft is a synthetic tube, usually made of PTFE (a slick, biocompatible plastic), that connects an artery to a vein. It’s placed under the skin and can be used in just 2 to 3 weeks after surgery.

But here’s the catch: grafts don’t last as long. About 30% to 50% of grafts need at least one intervention within the first year. Why? They’re more prone to clotting and infection than fistulas. They also tend to develop aneurysms or bulges over time, which can be dangerous if they rupture.

Still, grafts are a real lifeline. For someone who can’t get a fistula, a graft means they can start dialysis without waiting months. And while they require more attention, many patients manage them well with regular monitoring and proper hygiene.

Central Venous Catheter: Temporary, But Sometimes Permanent

Catheters are soft, flexible tubes inserted into a large vein in your neck, chest, or groin. They work immediately-no waiting. That’s why they’re often used for emergencies or when someone needs dialysis right away and doesn’t have time to wait for a fistula to mature.

But here’s the hard truth: catheters are the riskiest option. They’re the leading cause of bloodstream infections in dialysis patients. The rate? Between 0.6 and 1.0 infections per 1,000 catheter days. That means if you’re on a catheter for a year, you have a serious chance of getting a life-threatening infection. And yes, people die from these infections. Studies show catheter use leads to 28 more fatal infections per 100,000 patient-years than fistulas.

Many patients hate catheters because they can’t shower normally. The site has to stay dry, so sponge baths are the norm. Some avoid swimming, sports, or even tight clothing. And because they’re external, they’re more likely to get pulled or accidentally dislodged.

Some people end up on catheters long-term-not because they want to, but because they can’t get a fistula or graft. That’s a system failure, not a personal one. Efforts are still underway to reduce permanent catheter use, especially among Black patients, who are 30% less likely to get fistulas even when clinically eligible.

Close-up of an arm with a graft, glowing veins, and floating ultrasound waves as the patient checks for thrill.

How to Care for Your Dialysis Access

Each access type needs different care, but the rules are simple: keep it clean, check it daily, and speak up if something feels off.

For fistulas: Feel for the thrill-a vibration or buzzing sensation. That tells you blood is flowing. Check it every day before dialysis. Look for redness, swelling, or warmth. Never let anyone take your blood pressure or draw blood from that arm. Wear loose sleeves.
For grafts: Same as fistulas-check the thrill. But grafts need more frequent ultrasound checks. If you notice swelling or pain, call your care team right away. Clotting can happen fast.
For catheters: This is the most intensive. You need to clean the exit site daily with antiseptic. Change the dressing exactly as your nurse shows you. Never touch the catheter ends. If you see drainage, redness, or fever, get help immediately. These are signs of infection.

Most dialysis centers offer 2 to 3 training sessions to teach you how to care for your access. Don’t skip them. Patients who get proper education have 25% fewer complications in their first year.

What’s New in Dialysis Access Technology?

There’s real progress happening. In 2022, the FDA approved the first wireless sensor-Manan Medical’s Vasc-Alert-that monitors blood flow in fistulas. It sends alerts to your phone or your care team if flow drops, which can prevent clots before they happen. In clinical trials, it cut thrombosis events by 20%.

Another breakthrough? Pre-dialysis exercise. Studies show that doing arm exercises like squeezing stress balls or lifting light weights for 4 to 6 weeks before fistula surgery can boost maturation rates by 15% to 20%. It’s simple, cheap, and effective.

And on the horizon: bioengineered blood vessels. Humacyte’s human acellular vessel is in phase 3 trials. It’s made from donor cells stripped of their DNA, so your body doesn’t reject it. For people with no usable veins, this could be a game-changer.

Why So Many Fistulas Still Fail

Even with all the benefits, fistulas don’t always work. About 30% to 60% of them fail to mature-especially in older adults, diabetics, or people with poor circulation. That’s why vein mapping is critical. Before surgery, you should have an ultrasound to check your veins. If the veins are too small or blocked, a fistula won’t work. And if you don’t know that ahead of time, you’ll waste weeks waiting for something that won’t happen.

Also, smoking and high blood pressure can wreck your veins. If you smoke, quitting is the single best thing you can do for your access. If your blood pressure is out of control, managing it can make the difference between a lasting fistula and a failed one.

Diverse patients exercising in a garden with glowing bioengineered vessels rising from their arms like vines.

What You Can Do Right Now

If you’re on dialysis or about to start:

Ask your doctor if you’re a candidate for a fistula. Don’t assume you’re not.
Request vein mapping before any surgery.
Start arm exercises now-even if you’re not having surgery yet.
Learn how to check your thrill or pulse daily.
Know the signs of infection: redness, swelling, warmth, fever, pus.
Never let anyone use your access arm for blood draws or blood pressure.
Speak up if you’re stuck with a catheter long-term. There are options.

The goal isn’t just to survive dialysis. It’s to live well. And your access is the foundation of that.

Cost and Impact: Why This Isn’t Just About Health

Switching from catheters to fistulas isn’t just better for patients-it’s better for the system. The U.S. healthcare system spends an extra $1.1 billion every year because of catheter-related complications. That’s hospital stays, antibiotics, ICU trips, and lost work days. Every fistula that replaces a catheter saves money and saves lives.

But progress is uneven. Black patients are still less likely to get fistulas. Older patients are more likely to get catheters. And rural areas still struggle with access to vascular surgeons. These aren’t just medical issues-they’re equity issues.

What’s Next for Dialysis Access?

By 2030, fistulas are expected to make up 65% to 70% of permanent dialysis access. Catheters should drop to 15%. That’s a huge shift from 2003, when only 32% of patients had fistulas. The Fistula First Breakthrough Initiative proved that change is possible when hospitals, insurers, and patients work together.

But the challenge is growing. More people are starting dialysis older, with more diabetes and heart disease. That means we need better tools, better training, and better access to specialists. Innovation is happening. Now we need to make sure everyone benefits.