Haemodialysis vs peritoneal dialysis for the NCLEX

Compare where filtration happens and how access is used

In haemodialysis, blood travels through tubing to an external dialyser and returns to the circulation. Access may be an arteriovenous fistula, an arteriovenous graft, or a dialysis catheter. Knowing the access type helps you interpret the assessment and choose the correct precautions. A question about an arm fistula is asking you to think about blood flow and access protection, even when the patient has no pain or visible bleeding.

In peritoneal dialysis, solution enters the abdominal cavity, remains for a prescribed dwell, and then drains. The peritoneal membrane allows wastes and excess fluid to move into the solution. Exchanges may be done manually or with a cycler. The abdominal catheter provides access for fluid rather than serving as a vascular line. This difference explains why drainage characteristics, catheter connections, and abdominal symptoms feature prominently in peritoneal dialysis assessment.

Distinguish complications that need prompt attention

Haemodialysis can cause hypotension and muscle cramps as fluid is removed. Assess symptoms and blood pressure in relation to the treatment, and promptly involve the dialysis team when the patient deteriorates. At an established fistula or graft, a changed or absent thrill needs urgent assessment because access flow may be compromised. Observe the site for bleeding, redness, swelling, and other changes, using the access-specific assessment required by local policy.

Cloudy peritoneal drainage, especially with abdominal pain or fever, raises concern for peritonitis and requires prompt contact with the dialysis team. Do not explain it away as an expected effect of treatment. Infection can also involve the catheter exit site. Assess the patient and drainage, then follow the local process for obtaining a specimen and arranging treatment. These findings identify a problem needing evaluation; they do not establish the responsible organism.

Keep the teaching specific to the treatment

Protect a fistula or graft arm from blood pressure cuffs and unnecessary needle procedures, and teach the patient how to recognise a change in the usual access vibration. Catheter care follows its own infection prevention requirements. For peritoneal dialysis, teach connection technique, hand hygiene, exit-site care, and the prescribed exchange process. Ask for a demonstration, because being able to describe a procedure does not necessarily mean the person can perform each step safely.

Both modalities require attention to weight, blood pressure, fluid balance, laboratory results, and nutrition. Peritoneal dialysis can cause protein losses and absorption of glucose from dialysis solution, so nutrition and glucose management may need adjustment. Fluid and potassium advice is individualised. Home haemodialysis is also possible, so the location alone does not identify the modality. Treatment choice depends on clinical suitability, patient preferences, support, training, and the practical requirements of the programme.

Apply the comparison to an original priority question

Consider a hypothetical study item with two reports: one haemodialysis patient has an unchanged fistula thrill and no new symptoms; one peritoneal dialysis patient reports cloudy effluent and increasing abdominal pain. If asked which report requires prompt follow-up, the peritoneal dialysis report is the stronger choice. The deciding issue is a new complication signal. The word dialysis alone does not determine priority, and a normal access finding should not outweigh a concerning change.

Change the scenario: the peritoneal dialysis patient has clear drainage and feels well, while the haemodialysis patient has a newly absent fistula thrill. The priority changes to the vascular access problem. Do not select a routine exchange adjustment or wait until the next treatment without escalation. In both versions, first identify the modality, locate the relevant access, and interpret the new finding. Actual troubleshooting and treatment changes must follow the dialysis team’s orders and institutional procedures.

Sources and further reading

NIDDK: Hemodialysis. External filtration, vascular access, hypotension and treatment settings.

NIDDK: Peritoneal Dialysis. Exchanges, catheter technique and peritonitis warning signs.

NIDDK: Choosing a Treatment for Kidney Failure. Individual treatment selection, dietary differences and home treatment considerations.

National Kidney Foundation: Hemodialysis Access. Access protection, thrill assessment and signs of access problems.