Calcific Peritonitis Management
For a patient with calcific peritonitis on long-term peritoneal dialysis, the primary recommendation is to transition to hemodialysis, as calcific peritonitis represents documented loss of peritoneal function—an absolute contraindication to continuing PD. 1
Understanding Calcific Peritonitis
Calcific peritonitis (also called progressive calcifying peritonitis or sclerosing encapsulating peritonitis) is a rare but serious complication of long-term PD characterized by:
- Widespread peritoneal calcification with calcium plaques on visceral peritoneum
- Blood-stained dialysate effluent
- Intermittent or progressive abdominal pain
- Impaired bowel movements
- Progressive development of peritoneal calcifications
- Often associated with long-standing secondary hyperparathyroidism and recurrent peritonitis 2, 3
Primary Management Strategy
Transition to Hemodialysis
The NKF-K/DOQI guidelines explicitly state that documented loss of peritoneal function or extensive abdominal adhesions that limit dialysate flow constitute absolute contraindications for PD 1. Calcific peritonitis fundamentally compromises:
- Effective peritoneal blood flow
- Dialysate flow
- Peritoneal surface area availability
- Membrane permeability for adequate solute and fluid removal
Indications for switching from PD to HD include:
- Inadequate solute transport or fluid removal
- Development of technical/mechanical problems
- Unacceptably frequent peritonitis or other PD-related complications 1
Vascular Access Planning
When making the decision to transfer, vascular access should be addressed immediately as advised by the NKF-K/DOQI Vascular Access Work Group 1. This means:
- Evaluate for arteriovenous fistula placement as first-line option
- Allow adequate maturation time (typically 6-16 weeks)
- Consider tunneled dialysis catheter as bridge if urgent transition needed
Alternative Approach: Tidal PD (Temporizing Only)
In rare cases where a patient absolutely refuses hemodialysis or has prohibitive contraindications to HD, tidal automated peritoneal dialysis may serve as a temporizing measure 2. This approach:
- Uses smaller tidal volumes with continuous reserve volume
- May reduce mechanical trauma to calcified peritoneum
- Has been reported to maintain adequate creatinine clearances in isolated case reports
- Should be considered palliative rather than definitive management
Critical caveat: This is based on extremely limited evidence (single case report) and should only be attempted when HD is genuinely not feasible 2.
Addressing Underlying Contributors
While transitioning modalities, address contributing factors:
Secondary Hyperparathyroidism
- Strongly associated with calcific peritonitis development 2
- Target intact PTH levels of 150-300 pg/mL (16.5-33.0 pmol/L) 4
- Consider parathyroidectomy if medical management fails with PTH >800-1000 pg/mL
Peritonitis History
- Recurrent peritonitis, particularly with acetate-containing dialysate and continuous lavage treatment, may contribute to calcific peritonitis evolution 3
- This reinforces why continuing PD is contraindicated
Clinical Monitoring During Transition
Do not assume patients with extensive abdominal pathology cannot achieve successful dialysis outcomes—a trial of the new modality with documented adequacy is warranted 1. Monitor:
- Achievement of HD adequacy targets (single pool Kt/V ≥1.2 thrice weekly)
- Ultrafiltration adequacy
- Hemodynamic stability during HD sessions
- Resolution of abdominal symptoms after PD cessation
Common Pitfalls to Avoid
- Delaying transition: Continuing PD with inadequate clearances exposes patients to uremic complications and mortality risk
- Inadequate patient counseling: Patients must understand that calcific peritonitis represents mechanical failure of the peritoneal membrane, not treatment failure on their part
- Ignoring hyperparathyroidism: Failure to address severe secondary hyperparathyroidism perpetuates the calcification process
- Attempting to "push through" with standard PD: Unlike high or low transporters who may benefit from prescription adjustments, calcific peritonitis represents structural membrane failure 1
Patient Communication
Inform patients explicitly about the risks of staying on PD when adequacy cannot be achieved 1. The decision should integrate:
- Clinical assessment of peritoneal function
- Ability to reach dialysis adequacy targets
- Patient wishes and quality of life considerations
- Realistic expectations about PD continuation versus HD transition
The presence of calcific peritonitis fundamentally alters the risk-benefit calculation, making HD the medically necessary choice for preserving life and preventing uremic complications.