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  • Title: Rasburicase dose optimization for tumor lysis syndrome management in a network of community oncology practices.
    Author: Gilmore S, Carroll M, Koselke E, Hough S.
    Journal: J Oncol Pharm Pract; 2024 Jul; 30(5):867-872. PubMed ID: 37563922.
    Abstract:
    INTRODUCTION: Single, fixed-dose rasburicase administration has been evaluated as an effective strategy in the management of hyperuricemia in the hospital setting, but this has not yet been described within ambulatory community oncology practices. The objective of this study is to evaluate and optimize the dosing strategy for rasburicase in the management of tumor lysis syndrome (TLS)-associated hyperuricemia in The US Oncology Network (The Network). METHODS: A network-wide guideline was revised to standardize rasburicase dosing from a previous recommended fixed doses of 4.5 or 7.5 mg to either 3 or 6 mg for outpatient rasburicase use in management and prevention of TLS. The primary outcome evaluated mean dose of rasburicase among all patients before and after guideline revision. A retrospective chart review evaluated secondary endpoints. RESULTS: The primary analysis included 291 patients (128 pre-revised and 163 post-revised guideline implementation). The primary outcome, mean rasburicase dose, was reduced in the post-revision compared to the pre-revision population (mean 6.2 mg pre vs. 4.5 mg post, p < 0.00001) resulting in a reduced cost per rasburicase dose of $974. Fifty patients were included for the secondary analysis. Guideline concordance was identified in 12 (48%) and 16 patients (64%), and uric acid <8 mg/dL post-rasburicase administration occurred in 14 (56%) and 16 patients (64%) before and after guideline revision, respectively. CONCLUSIONS: Guideline revision and electronic health record modification resulted in a 27% reduction in the mean rasburicase dose and a 50% reduction in repeat rasburicase dosing without a negative impact on clinical efficacy.
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