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Continuous Ambulatory Peritoneal Dialysis (CAPD) vs Automated Peritoneal Dialysis (APD) — comparing schedules, outcomes, costs, and patient suitability per ISPD guidelines.
Evidence reviewed & updated: 2026-07 — reflects the latest published trials and guidelines.
CAPD uses 4-5 manual exchanges per day (30 min each); APD uses an automated cycler overnight while the patient sleeps. Both deliver comparable adequacy and survival. APD suits employed patients and high transporters; CAPD is simpler, cheaper (no cycler cost), and preferred in many Indian settings where electricity/space for cyclers is limited. ISPD guidelines recommend patient-centered selection with both options offered.
CAPD (Continuous Ambulatory Peritoneal Dialysis): 4-5 exchanges daily — each involves draining the abdomen (20-30 min), instilling fresh dialysate (10 min), and a dwell period of 4-6 hours. All done manually with double-bag systems. Total daily treatment time: 2-4 hours of active effort.
APD (Automated Peritoneal Dialysis): A cycler machine performs 3-6 exchanges overnight (8-10 hours) while the patient sleeps. Daytime: either a single long dwell (CCPD) or dry abdomen. Setup takes 15-20 minutes nightly; patients are free during the day.
Both modalities use the same peritoneal membrane; the difference is automation and timing. Adequacy (weekly Kt/V ≥1.7 per KDOQI) must be measured and prescription adjusted for either modality.
Large registry studies (USRDS, ANZDATA) show comparable adjusted survival between CAPD and APD. Some analyses suggest slightly better ultrafiltration with APD in high-transporter patients, while low transporters may do better with CAPD due to longer dwell times.
Residual kidney function preservation appears similar between modalities when prescriptions are adequate. Peritonitis rates are comparable: target <0.4 episodes/patient-year with modern double-bag systems (ISPD 2022).
APD has a theoretical advantage in children, large patients (higher clearances), and patients with nocturnal fluid overload — the cycler allows precise ultrafiltration profiling.
CAPD consumables: ₹15,000-18,000/month (4 exchanges/day with Baxter or Claris systems). APD adds: cycler purchase (₹1.5-2.5 lakh, or rental ₹3,000-5,000/month) plus night bags (₹18,000-22,000/month). Total APD cost is ~20-30% higher monthly in India.
APD requires: reliable electricity (cycler runs overnight), home space for cycler and supplies, and backup power (UPS) for power-cut regions. CAPD requires only storage space and clean hands.
Government schemes (Pradhan Mantri National Dialysis Programme) primarily support in-center HD; PD support varies by state. PD-First programs (Tamil Nadu) cover PD supplies, making modality choice cost-neutral for patients.
Prefer APD for: employed patients (daytime freedom), high transporters, children (overnight while sleeping), patients with nocturnal fluid overload, and those with low manual dexterity issues for daytime exchanges.
Prefer CAPD for: patients in power-unreliable areas, low transporters needing longer dwells, those with limited home space, elderly patients who prefer a simpler daytime routine, and cost-sensitive patients.
Hybrid regimens (APD with a midday exchange) can optimize adequacy in large patients. ISPD 2022 emphasizes: 'Prescribe the modality that best fits the patient's lifestyle, physiology, and support system.'
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.