Dialysis Access: Caring for Your Lifeline

When patients first hear the word access, they often imagine something invasive or intimidating. But at Florida Kidney Physicians, we call your dialysis access your lifeline — because it truly is the connection that makes treatment possible.

Whether you receive hemodialysis at a center or peritoneal dialysis at home, your access plays a central role in every session. Caring for it properly keeps treatments efficient, prevents infections, and protects your overall health. In this article, we’ll explain the different types of access, how they work, and how to take care of them confidently.

What Is Dialysis Access?

Dialysis access is the physical pathway that allows treatment to reach the blood or the abdominal cavity. The access does not clean the blood by itself. Instead, it provides the connection required for dialysis.

During hemodialysis, blood travels through tubing to a filter called a dialyzer. Waste products and excess fluid are removed before the blood returns to the body.

During peritoneal dialysis, dialysis solution enters the abdomen through a catheter. The peritoneum—the membrane lining the abdominal cavity—functions as a semipermeable membrane. Waste products and excess water move from small blood vessels into the dialysis solution, which is later drained.

A well-functioning access can:

• Provide the blood flow or fluid exchanges required for treatment.
• Help deliver the prescribed dialysis treatment.
• Help identify problems before they interrupt treatment or require an urgent procedure.
• Reduce avoidable contamination, pressure, and physical injury.

The term access patency means that the access remains open and maintains enough blood flow to function properly.

Daily checks, careful hygiene, and prompt reporting can help prevent some complications and allow others to be detected earlier. They cannot prevent every episode of narrowing, clotting, infection, or access failure.

What Types of Dialysis Access Are Used?

Arteriovenous Fistula

An arteriovenous fistula, or AV fistula, is created by directly connecting an artery to a vein, usually in the forearm or upper arm.

The increased blood flow gradually enlarges and strengthens the vein so it can support repeated needle placement during hemodialysis. This process is called maturation.

A fistula may require several weeks or months before it is ready. The dialysis or vascular-access team must examine it and confirm that it has developed adequate blood flow before it is used.

Arteriovenous Graft

An arteriovenous graft, or AV graft, uses a soft synthetic tube to connect an artery and a vein.

A graft may be considered when a patient’s blood vessels are not suitable for a fistula or when it better supports the person’s overall treatment plan. Some grafts can be used sooner than a fistula, although timing depends on the graft, healing, and clinical assessment.

Hemodialysis Catheter

A hemodialysis catheter is a soft tube placed into a large vein, commonly in the neck or chest.

It may be used when dialysis must begin before a fistula or graft is ready or when another access is not currently appropriate. A catheter can often be used soon after placement, but it generally carries a higher risk of bloodstream infection than an AV fistula or AV graft.

Peritoneal Dialysis Catheter

A peritoneal dialysis catheter is a soft, flexible tube placed through the abdominal wall into the peritoneal cavity.

Dialysis solution flows through the catheter into the abdomen, remains there for a prescribed period called the dwell time, and is then drained. This fill, dwell, and drain process is called an exchange.

How Is the Right Dialysis Access Selected?

There is no single access that is best for every patient.

The goal is to select the right access for the right patient at the right time, based on the person’s broader kidney-failure treatment plan.

This individualized approach may consider:

• How soon dialysis may be needed.
• The condition of the patient’s blood vessels.
• Other medical conditions.
• Future transplant possibilities.
• Home-dialysis preferences.
• Previous access procedures.
• Lifestyle and treatment goals.

This approach is consistent with the KDOQI concept of an individualized ESKD Life-Plan, rather than automatically selecting the same access for every patient.

How to Care for an AV Fistula or Graft

Check the Thrill Every Day

A thrill is the vibration created by blood flowing through a fistula or graft.

Place your fingertips gently over the access and learn how its normal vibration feels. Check it every day, including on days when you do not receive dialysis.

A weaker, irregular, or absent thrill may indicate reduced blood flow. Possible causes include:

• Stenosis: narrowing inside the access or a nearby blood vessel.
• Thrombosis: formation of a blood clot.
• Another problem affecting the access circuit.

Reduced blood flow can compromise access patency and interfere with the blood-flow rate needed for hemodialysis. However, a change in the thrill does not identify the cause by itself.

Contact your dialysis team immediately if the thrill disappears or becomes clearly different.

Do not massage, squeeze, heat, or attempt to reopen the access yourself. KDOQI identifies a weak or discontinuous thrill as a clinical sign that may require assessment for a significant access lesion.

Protect the Access Arm

Unless the dialysis or vascular-access team specifically directs otherwise:

• Do not allow blood pressure measurements on the access arm.
• Do not allow routine blood draws, injections, or IV lines in that arm.
• Avoid tight sleeves, watches, bracelets, or bands over the access.
• Do not carry bags or objects that place direct pressure on it.
• Avoid sleeping with your head or body weight on the access arm.
• Follow temporary lifting and exercise restrictions after access surgery.

These precautions help protect blood flow and reduce the risk of compression or injury.

Keep the Access Clean

Wash the access arm daily and before dialysis using the method recommended by your care team.

Do not:

• Scratch the access.
• Pick at scabs.
• Apply unapproved creams, ointments, powders, or antiseptics.
• Touch prepared needle sites after the skin has been cleaned.
• Insert needles unless you have completed formal self-cannulation training.

Watch for Prolonged or Unusual Bleeding

After dialysis needles are removed, apply gentle, continuous pressure exactly as your dialysis staff has taught you.

Do not press so hard that the thrill disappears. Excessive pressure can block blood flow through the access.

Contact the dialysis center immediately if bleeding:

• Is heavier than usual.
• Is not stopping as expected.
• Repeatedly takes longer than usual to stop.
• Begins again after you leave the dialysis center.

Continue applying steady pressure while you call.

If bleeding has not stopped after approximately 30 minutes of steady pressure, contact the center even when the bleeding does not appear heavy. Follow a different threshold when your dialysis program has given you specific instructions.

Repeatedly prolonged bleeding may occur when narrowing increases pressure inside the access. Needle placement, blood-thinning medications, clotting problems, and other factors may also contribute. The dialysis team must determine the cause.

Call 911 if the bleeding:

• Is spurting or rapidly flowing.
• Rapidly soaks through gauze.
• Cannot be controlled with direct pressure.
• Is accompanied by weakness, dizziness, confusion, severe shortness of breath, or fainting.

Watch for Changes in the Size or Skin Over the Access

A fistula or graft may develop a bulging area called an aneurysm or pseudoaneurysm.

Not every bulge requires emergency treatment, but contact the dialysis or vascular-access team immediately for:

• Rapid enlargement of a bulging area.
• Skin that becomes very thin, shiny, discolored, ulcerated, or difficult to pinch.
• An open sore, wound, or scab over a dilated area.
• Repeated bleeding from the same area.
• Any spontaneous bleeding from the access.

KDOQI identifies ulcerated or necrotic skin, erosion, hemorrhage, and rapidly expanding aneurysms as findings requiring urgent or emergent evaluation.

Severe bleeding from an aneurysm or pseudoaneurysm is an emergency. Apply direct pressure and call 911.

Watch for Reduced Circulation to the Hand

An AV fistula or graft changes blood flow in the arm. In some patients, this can reduce circulation to the hand, a complication called access-related hand ischemia.

Contact the dialysis team promptly if the hand becomes:

• Unusually cold.
• Painful or numb.
• Weak.
• Pale or blue.
• Painful during dialysis.

Sudden severe hand pain, loss of strength or movement, pain at rest, very pale or blue fingers, or an open sore requires urgent evaluation.

Moderate or severe access-related hand ischemia requires prompt treatment to reduce the risk of long-term disability or tissue loss.

How to Care for a Hemodialysis Catheter

A hemodialysis catheter provides a direct pathway into a large blood vessel. Bacteria or other microorganisms can enter through the catheter site or its connections and cause a catheter-related bloodstream infection.

To reduce this risk:

• Keep the dressing clean, dry, and securely attached.
• Tell the dialysis team if the dressing becomes wet, loose, damaged, or visibly dirty.
• Do not remove the catheter caps.
• Do not open or disconnect the catheter.
• Do not allow anyone who is not trained in dialysis catheter care to use it.
• Do not submerge the catheter or dressing in water.
• Follow your dialysis program’s instructions for showering and waterproof protection.
• Use only products approved for your catheter and prescribed by the dialysis team.

CDC guidance recommends replacing a catheter dressing when it becomes damp, loose, or visibly soiled. It also advises against submerging the catheter and permits showering only when an impermeable covering can adequately protect the catheter and connections.

Contact the dialysis team immediately for:

• Fever or chills.
• Nausea or sudden weakness.
• Redness, warmth, tenderness, swelling, or drainage.
• Catheter leakage or bleeding.
• A cracked, pulled, displaced, or disconnected catheter.
• A wet, loose, damaged, or missing dressing.

Call 911 when possible infection is accompanied by new confusion, fainting, loss of consciousness, severe breathing difficulty, clammy skin, or rapidly worsening illness.

Do not push a catheter back into place, reconnect it, or attempt to repair it yourself.

How to Care for a Peritoneal Dialysis Catheter

Placement and Healing

When circumstances allow, a peritoneal dialysis catheter is usually placed before regular treatment is scheduled to begin.

NIDDK explains that the catheter often works better when it has approximately 10 to 20 days to heal before a full exchange schedule begins. ISPD generally recommends beginning peritoneal dialysis at least two weeks after insertion when the clinical situation permits.

Urgent-start peritoneal dialysis may require a different schedule and lower initial fill volumes.

The care team—not the calendar alone—determines when and how the catheter can be used safely.

Routine Peritoneal Dialysis Exit-Site Care

The place where the catheter leaves the body is called the exit site.

Inspect the exit site every day. Clean it according to the schedule and method prescribed by your peritoneal dialysis program.

ISPD recommends cleansing the exit site at least twice weekly and after showering, water exposure, or vigorous exercise. Some dialysis programs prescribe a daily routine based on the patient’s circumstances and local protocol.

Follow the routine taught by your dialysis program:

• Wash and dry your hands before touching the catheter or supplies.
• Perform exchanges in a clean, dry, well-lit space.
• Wear a surgical mask during connections and disconnections when instructed.
• Use only the cleaning solution recommended by your program.
• Dry and cover the site as instructed.
• Keep the catheter secured to prevent pulling, twisting, or friction.
• Inspect for redness, tenderness, swelling, crusting, or drainage.
• Check dialysis solution bags for damage, leaks, contamination, or cloudiness.

No single cleansing agent has been shown to be superior for every patient. Do not change products or routines based on general online instructions.

Topical Antibiotics at the Exit Site

ISPD recommendations support daily topical mupirocin or gentamicin to help prevent catheter-related infections.

However, the exact product must be prescribed by the peritoneal dialysis program. The appropriate choice may depend on:

• Catheter material.
• Allergies.
• Previous infections.
• Local antimicrobial resistance.
• Product compatibility.
• The program’s established protocol.

Do not begin, stop, alternate, or substitute antibiotic creams or ointments on your own.

ISPD notes that the comparative effectiveness of mupirocin and gentamicin remains uncertain and that some formulations can interact with catheter materials.

Showering, Bathing, and Swimming

During the initial healing period, keep the surgical and exit sites dry as instructed and do not submerge the catheter.

After the site has healed, ask the peritoneal dialysis team before swimming, bathing, or participating in water activities.

Recommendations may vary based on:

• Water quality.
• The type of activity.
• Exit-site protection.
• Catheter healing.
• Individual infection risk.

Clean and dry the exit site after approved water exposure or vigorous exercise according to your program’s instructions.

Cloudy Peritoneal Dialysis Fluid

Cloudy effluent should be treated as possible peritonitis until your peritoneal dialysis team evaluates it.

Effluent is the used dialysis fluid that drains from the abdomen.

Peritonitis is an infection or inflammation involving the peritoneal cavity. It may cause:

• Abdominal pain.
• Fever or chills.
• Nausea or vomiting.
• General weakness.
• Cloudy drained fluid.

Some patients have little or no abdominal pain. ISPD recommends presuming that cloudy effluent represents peritonitis until the diagnosis is confirmed or excluded.

Do not delay contacting your peritoneal dialysis team while waiting for your next appointment or scheduled exchange.

Follow the team’s instructions about:

• Your next exchange.
• Whether to save the drained bag for testing.
• Where and when to receive evaluation.
• Any temporary changes to your treatment routine.

Other Peritoneal Dialysis Catheter Warning Signs

Contact your peritoneal dialysis team immediately for:

• Redness, tenderness, swelling, crusting, pus, or drainage at the exit site.
• New pain or swelling along the catheter tunnel.
• Fluid leaking around the catheter.
• A catheter that has been pulled, cut, cracked, damaged, or disconnected.
• Fever, chills, nausea, vomiting, or worsening abdominal pain.

Do not reconnect, repair, or reposition a damaged catheter unless your dialysis program has specifically trained you to perform an emergency procedure.

Everyday Ways to Protect Your Dialysis Access

• Choose clothing that does not compress the access or pull on catheter tubing.
• Avoid sleeping directly on a fistula, graft, or external catheter.
• Secure peritoneal dialysis tubing during sleep as instructed.
• Follow the surgeon’s restrictions after access placement.
• Ask the care team before returning to heavy lifting, contact sports, swimming, or strenuous exercise.
• Report changes promptly instead of waiting for the next routine appointment.

For broader guidance about treatment routines, lifestyle, exercise, and travel, readers can also consult Florida Kidney Physicians resources about:

• Types of dialysis.
• What happens during dialysis treatment.
• Lifestyle adjustments for dialysis patients.
• Traveling while receiving dialysis.

Frequently Asked Questions

How long does each type of dialysis access take to heal?

An AV fistula may need several weeks or months to mature. An AV graft may be usable sooner, depending on its type and healing. A peritoneal dialysis catheter commonly needs a healing period before a full exchange schedule begins. A hemodialysis catheter can often be used soon after placement. Your care team must evaluate the access before deciding that it is ready.

What should I do if the thrill in my fistula or graft changes?

Contact your dialysis team immediately. A weaker or absent thrill may mean that blood flow has decreased because of narrowing, clotting, or another access problem. Do not massage, squeeze, heat, or attempt to reopen the access yourself.

How long should bleeding from a dialysis needle site last?

Bleeding should stop with the gentle, continuous pressure technique taught by your dialysis team. Contact the center immediately if bleeding is heavier than usual, starts again, or is not stopping as expected; do not wait for a time limit before calling. If it has not stopped within approximately 30 minutes, call the center even if the bleeding is not heavy. Call 911 for spurting, rapidly flowing, or uncontrolled bleeding, or if you feel faint, weak, confused, or short of breath.

Can someone take blood pressure or draw blood from my access arm?

Blood pressure cuffs, routine blood draws, injections, and IV lines should not be placed in the access arm unless the dialysis or vascular-access team specifically directs otherwise. Pressure or injury can interfere with blood flow or damage the access.

Can I shower with a hemodialysis catheter?

Do not submerge a hemodialysis catheter or its dressing. Showering may be permitted when the catheter and connections can be fully protected with an impermeable covering. Follow the exact instructions provided by your dialysis team.

What should I do if my hemodialysis catheter dressing gets wet or comes loose?

Contact your dialysis team promptly. A wet, loose, dirty, damaged, or missing dressing can expose the catheter site to contamination. Do not remove or replace the dressing yourself unless your dialysis program has trained you to do so.

What should I do if my peritoneal dialysis fluid looks cloudy?

Contact your peritoneal dialysis team immediately. Cloudy drained fluid should be treated as possible peritonitis until the team evaluates it, even if abdominal pain is mild or absent. Follow the team’s instructions about your next exchange and whether to save the drained bag for testing.

Can I sleep on my fistula arm?

Avoid sleeping with your head or body weight directly on the fistula or graft arm. Prolonged pressure may reduce blood flow through the access.

The FAQ recommendations above are based on patient guidance and clinical recommendations from NKF, KDOQI, ISPD, NIDDK, and CDC.

Protecting Your Dialysis Lifeline

Dialysis access is an essential part of treatment. Protecting it depends on three consistent habits:

• Follow the care routine taught by your dialysis program.
• Inspect the access and surrounding skin regularly.
• Report changes promptly instead of waiting for the next scheduled visit.

At Florida Kidney Physicians, we work with patients, caregivers, surgeons, and dialysis teams to support individualized access planning and care.

When something looks or feels different, contacting the team early is one of the most important steps you can take to protect your access and your health.

This article provides general patient education and does not replace the individualized instructions provided by your nephrologist, surgeon, vascular-access specialist, or dialysis program.