In a patient who has stopped dialysis and is now undergoing active cancer therapy, should dialysis be restarted based on expected survival, symptom burden, and goals of care?

Restarting Dialysis in Cancer Patients Who Previously Stopped

In a patient who stopped dialysis and is now receiving active cancer treatment, dialysis should be restarted if the cancer prognosis exceeds 2-3 months and treatment goals align with life-prolonging therapy, using a time-limited trial approach with ongoing reassessment of goals of care. 1

Decision Framework Based on Prognosis

When cancer-related prognosis for survival is less than 2 weeks, dialysis should be stopped. 1 This represents the clearest threshold from KDIGO guidelines, as withdrawal from chronic dialysis leads to death within a few weeks. 1

For patients with longer expected survival:

• If prognosis is 2-3 months or greater and the patient desires life-prolonging cancer therapy, consider restarting dialysis 1
• The decision must incorporate whether dialysis enables the patient to receive and tolerate cancer treatment 2, 3
• Approximately 72% of dialysis patients receiving chemotherapy need dose adjustments, and 82% require drugs administered after dialysis sessions 2

Mandatory Shared Decision-Making Process

Before restarting dialysis, conduct a structured shared decision-making discussion that includes the patient (or legal agent), nephrologist, oncologist, and ideally palliative care. 1 This discussion must cover:

• Life expectancy estimates from both renal and oncologic perspectives 1
• Quality of life expectations with and without dialysis 1
• Treatment burden versus benefit, including chemotherapy tolerability 2, 3
• All treatment options explicitly:
  • Restarting dialysis with continued cancer treatment 1
  • Time-limited trial of dialysis (typically 2-4 weeks to assess benefit) 1
  • Conservative management without dialysis plus palliative care 1
  • Concurrent hospice and dialysis if goals are comfort-focused 4

Document this discussion with dated informed consent or refusal. 1

Time-Limited Trial Approach

For patients with uncertain prognosis or when consensus cannot be reached, offer a time-limited trial of dialysis (typically 2-4 weeks). 1 This approach:

• Allows assessment of functional status, symptom burden, and treatment tolerance 1
• Provides a structured off-ramp if dialysis proves more burdensome than beneficial 1
• Must include pre-specified criteria for continuing versus stopping (e.g., ability to tolerate chemotherapy, functional improvement, acceptable symptom burden) 1

Integration with Cancer Treatment

Chemotherapy timing must be coordinated with dialysis sessions. 2, 3 Key considerations:

• Most chemotherapy agents should be administered immediately after dialysis to avoid premature drug removal 2
• Dose adjustments are required for 72% of chemotherapy agents in dialysis patients 2
• Chemotherapy is often prematurely stopped or omitted in dialysis patients despite indications, representing a care gap 2

Survival in dialysis patients with cancer is not uniformly poor—patients without hematologic malignancies have similar survival to matched dialysis patients without cancer. 5 This supports considering dialysis restart in appropriately selected patients.

Reassessment Triggers

Reassess goals of care and the decision to continue dialysis at these sentinel events: 1

• Initiation of each new chemotherapy regimen 1
• Development of CNS metastases 1
• ICU admission or need for mechanical ventilation 1
• Major complications that substantially reduce survival or quality of life 1
• Patient request to reconsider the treatment plan 1

When NOT to Restart Dialysis

Do not restart dialysis in patients with: 1

• Cancer prognosis less than 2 weeks 1
• Irreversible profound neurologic impairment with no signs of awareness 1
• Terminal illness from cancer that precludes meaningful benefit from dialysis 1
• Patient or legal agent refusal after informed discussion 1
• Medical conditions that preclude the technical process of dialysis 1

Palliative Care Integration

All patients considering dialysis restart in the context of cancer should receive concurrent palliative care consultation. 4 This addresses:

• Systematic symptom assessment using validated tools (ESAS-R or iPOS-R) 4
• Advance care planning with ongoing documentation 4
• Spiritual and psychosocial support 4
• Coordination between nephrology and oncology teams 4

Approximately 62% of patients who stop dialysis access hospice, compared to only 16% who continue dialysis, representing a significant access barrier. 4 Advocate for concurrent hospice and dialysis when aligned with patient goals, framing dialysis as "palliative dialysis" focused on comfort. 4

Common Pitfalls

• Assuming dialysis must permanently cease once stopped—the decision can be revisited based on changing circumstances and goals 1
• Failing to involve oncology in the dialysis decision—cancer prognosis and treatment tolerability are central to the decision 1, 2
• Not offering time-limited trials—this approach reduces decision paralysis and provides real-world data on benefit versus burden 1
• Inadequate chemotherapy dosing or timing—82% of agents require post-dialysis administration 2
• Focusing solely on survival rather than quality of life and symptom burden 1, 4