Am J Health Syst Pharm 2019 Apr 17. Epub 2019 Apr 17.
Drake University College of Pharmacy and Health Sciences, Des Moines, IA.
Purpose: We describe the use of liposomal amphotericin B and amphotericin B deoxycholate in a critically ill patient with pulmonary blastomycosis receiving both venovenous extracorporeal membrane oxygenation (ECMO) and continuous renal replacement therapy (CRRT).
Summary: A 50-year-old African American man presented for dyspnea and cough and was noted to have blastomycosis on bronchoscopy. He developed respiratory failure and acute kidney injury, requiring mechanical ventilation, ECMO, and CRRT. After 4 days of liposomal amphotericin, the transmembrane pressure gradient on the membrane oxygenator increased dramatically without visualization of a clot, requiring a circuit exchange. A trough amphotericin B level taken the day before the exchange was undetectable for amphotericin B. After the circuit exchange, the patient was switched to amphotericin B deoxycholate. A subsequent trough level was 3.8 μg/mL. The patient improved and was able to be decannulated. However, he did require tracheostomy and long-term hemodialysis.
Conclusion: In our case we believe that liposomal amphotericin B was significantly removed by ECMO and was responsible for the failure of the ECMO circuit. We would suggest amphotericin B deoxycholate be used in such patients preferentially and that serum levels of the drug be assessed when possible.
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