A hemodialysis catheter provides access to the bloodstream so blood can pass through the dialysis machine and return to the body. Understanding why it is being used, who cares for it, and what the longer-term access plan is can make treatment less confusing.
This guide concerns blood access for hemodialysis. The word catheter also describes other tubes used in medicine, including urinary catheters, which have different purposes and care instructions.
Understand the three main access terms
NIDDK explains hemodialysis and vascular access. A catheter enters a vein. A fistula or graft creates an access that is usually reached with needles during hemodialysis. The choice involves clinical assessment and planning.
On a small screen, scroll the table sideways to read all columns.
| Access | Basic arrangement | Ask the kidney team |
|---|---|---|
| Venous catheter | A tube placed in a large vein provides access for dialysis. | Why is this the appropriate access now, and when will the plan be reviewed? |
| Arteriovenous fistula | Surgery connects an artery and vein; the access needs time and assessment before use. | Are my vessels suitable, and what is the expected preparation pathway? |
| Arteriovenous graft | A synthetic tube connects an artery and vein. | Why might a graft suit my circumstances, and what follow-up would it need? |
Infection can affect any access. CDC identifies central venous catheters as having the highest bloodstream-infection risk among these access types. That is a reason to discuss options and prevention with your team, not a reason to interrupt needed dialysis.
Find out what comes next
A catheter may be needed when dialysis must begin before another access is ready. Some people have more complicated access needs. Ask your nephrologist to explain the reason in your case, whether a fistula or graft is being considered, and what must happen before a change.
Record any surgical referral, access assessment and next review date. If another access is developing, ask who will confirm that it is ready and arrange catheter removal. A calendar estimate does not substitute for that assessment.
A practical planning question
“I understand why the catheter is needed today. What is the next decision about access, who is responsible for it, and when should I expect to hear?” This question identifies a next step without assuming everyone follows the same pathway.
Keep the line within the care team's routine
Ask staff to demonstrate what you should observe and what they will handle. Clean your hands as instructed, protect the catheter from pulling, and follow the team's bathing and dressing plan. Notify staff if the dressing is wet, dirty or loose. Leave caps, clamps, flushing and connections to people specifically trained and authorized under your care plan.
The CDC explanation of dialysis bloodstream infections describes why prevention matters. You can ask staff about hand cleaning, access care and measures to lower infection risk. Tell the team if instructions are difficult to follow at home so it can help solve the problem.
Know the daytime and after-hours contacts
Report redness, swelling or unusual drainage at the site promptly. Fever, chills or feeling suddenly unwell need urgent clinical advice, especially with a bloodstream catheter. Cambridge University Hospitals explains catheter-infection symptoms. For a suspected emergency, severe breathlessness, collapse or uncontrolled bleeding, use local emergency services.
If the catheter is damaged or leaking, contact the dialysis team urgently. If it becomes displaced or falls out, seek emergency help immediately; apply firm pressure with a clean cloth over a bleeding exit site while help is arranged. Gloucestershire Hospitals describes this emergency response. Do not try to reconnect or reinsert it. Ask your team to explain the written emergency plan for your line before you go home.
Download the dialysis access question sheet to record that plan's location, contacts and follow-up. Keep the current access details with your portable health summary when seeing another healthcare team.
General patient education. Use your clinical team’s instructions for your care. Explore the medical guides.