What is the difference between IPD and CAPD in peritoneal dialysis?

Generally, the differences between Intermittent Peritoneal Dialysis (IPD) and Continuous Ambulatory Peritoneal Dialysis (CAPD) include variations in operation methods, dialysis duration, efficiency in removing toxins and excess fluid, applicable patient populations, and complications. The specific analysis is as follows:

1. Different operation methods

IPD is typically performed 4–6 times daily, using 2000–3000 ml of dialysate per exchange, with each exchange lasting 20–30 minutes to remove toxins and excess fluid. In contrast, CAPD is a simpler method that allows patients greater mobility without machine assistance. It involves continuous, slow exchanges of dialysate within the peritoneal cavity to eliminate toxins and excess fluid.

2. Different dialysis durations

IPD usually takes 1–3 hours per session, whereas CAPD operates continuously. Patients can perform dialysis during sleep and change the dialysate at any time during the day.

3. Differences in toxin and fluid removal

IPD rapidly removes toxins and excess fluid by intermittently infusing large volumes of dialysate. CAPD, on the other hand, achieves clearance through continuous, gradual exchange of dialysate in the peritoneal cavity. Therefore, IPD is faster in removing toxins and excess fluid, while CAPD provides more stable control of the patient's electrolyte and acid-base balance.

4. Different applicable patient populations

IPD is generally suitable for patients with acute renal failure who require rapid removal of toxins and excess fluid, or those needing short-term dialysis treatment. CAPD is more appropriate for patients with chronic renal failure who require long-term dialysis and are able to manage multiple daily peritoneal dialysis exchanges.

5. Different complications

Complications associated with IPD mainly include abdominal pain, bleeding, and infection. CAPD has relatively fewer complications, primarily consisting of fluid leakage and tunnel infections.

If patients experience any discomfort, they should seek timely medical attention at a hospital to avoid delays in treatment.