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Influence of implementing a protocol for an intravenously administered ammonia scavenger on the management of acute hyperammonemia in a pediatric intensive care unit.

The purpose of the study was to evaluate the influence of establishing a protocol for the use of combined sodium benzoate and sodium phenylacetate (SBSP) (Ammonul®) to treat acute hyperammonemia. This was a retrospective, single-center study in a 24-bed medical and surgical pediatric intensive care unit (PICU) in a tertiary care teaching maternal-child hospital in Canada. Inclusion criteria were age <18 years, PICU admission between 1 January 2000 and 30 June 2016, and SBSP treatment. An SBSP delivery protocol was implemented in our hospital on 30 August 2008 in order to improve management of acute hyperammonemia. Patients were assigned to one of the two groups, without or with protocol, depending on date of admission. SBSP was ordered 34 times during the study period, and 23 orders were considered for analysis (14 with and 9 without protocol). Patient characteristics were similar between groups. The median time from diagnosis to prescription was significantly shorter in the protocol group [40 min (21-82) vs 100 min (70-150), p = 0.03)] but the median time from diagnosis to administration of the treatment was equivalent [144 min (90-220) vs 195 (143-274), (p = 0.2)]. Other clinical outcomes did not differ. This study is the first to compare two SBSP delivery strategies in the treatment of acute hyperammonemia in this PICU setting. Implementation of a delivery protocol shortened the time from diagnosis of hyperammonemia to prescription of SBSP and helped us identify other parameters that can be improved to optimize treatment delivery.

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