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  • Title: Efficacy and Outcomes After Vasopressin Guideline Implementation in Septic Shock.
    Author: Wu JY, Stollings JL, Wheeler AP, Semler MW, Rice TW.
    Journal: Ann Pharmacother; 2017 Jan; 51(1):13-20. PubMed ID: 27630192.
    Abstract:
    BACKGROUND: In septic shock, the dose of norepinephrine (NE) at which vasopressin (AVP) should be added is unknown. Following an increase in AVP price, our medical intensive care unit (MICU) revised its vasopressor guidelines to reserve AVP for patients requiring greater than 50 µg/min of NE. OBJECTIVE: The purpose of this study is to compare efficacy and safety outcomes for patients admitted before the guideline revision with those for patients admitted after the revision. METHODS: This was a single-center, retrospective cohort study of patients admitted to Vanderbilt University Medical Center from November 1, 2014, to November 30, 2015. Before June 1, 2015, the vasopressor guidelines recommended initiation of AVP for patients requiring 10 µg/min of NE or greater. After June 1, 2015, the guidelines recommended initiation of AVP at a NE dose of 50 µg/min or greater. RESULTS: Time to achieve goal mean arterial pressure (MAP) was shorter in the postintervention group (2.0 vs 1.3 hours; P = 0.03) in univariate analysis but not after adjusting for prespecified confounders. Incidence of new arrhythmias was similar between the 2 groups (14.9% vs 10.9%; P = 0.567). In multivariable analysis accounting for baseline severity of illness, admission after the revision was associated with decreased 28-day mortality (odds ratio = 0.34; 95% CI = 0.16-0.71; P = 0.004). CONCLUSIONS: Use of a vasopressor guideline restricting AVP initiation in septic patients to those on at least 50 µg/min of NE appeared to be safe and did not affect the time to reach goal MAP.
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