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When CRRT on ECMO Is Not Enough for Potassium Clearance: A Case Report
Janice A Tijssen1, Guido Filler1,2,3
1Department of Pediatrics, Children's Hospital, London Health Sciences Centre, University of Western Ontario, Canada.
Background:
Continuous renal replacement therapy (CRRT) is an excellent method used to remove fluid and solutes. It may also reduce the systemic inflammatory response for patients on extracorporeal membrane oxygenation (ECMO) support. The objective of this report is to describe a case where CRRT in combination with ECMO was insufficient to control hyperkalemia.
Methods:
We report the case of an adolescent patient with refractory symptomatic hyperkalemia due to substantial rhabdomyolysis in which CRRT insufficiently cleared the patient's excess potassium.
Results:
Intermittent hemodialysis (IHD) was added and proved successful. The patient was weaned off ECMO, CRRT, and IHD, and his cardiac and renal function eventually normalized.
Conclusions:
Two important lessons can be learned from this case report: (1) If CRRT is insufficient in achieving a desirable potassium balance, additional IHD should be considered and (2) separate IHD access should be considered to improve efficacy.
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