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Efficacy of bolus-dose epinephrine to manage hypotension in the prehospital setting.
American Journal of Emergency Medicine 2021 July 19
PURPOSE: Hypotension in the Emergency Department (ED) and the prehospital setting has been associated with significant morbidity and mortality. Limited literature exists exploring the utilization of intravenous (IV) bolus-dose epinephrine (BDE) by Emergency Medical Services (EMS).
METHODS: A retrospective review evaluated patients transported to an academic medical center who had received IV BDE by a single urban EMS system from 2016 to 2020. The primary outcome was to assess the influence IV BDE had on systolic blood pressure (SBP). Secondary objectives were to assess changes in heart rate (HR), the impact of dose variability on SBP, and the incidence of severe hypertension (SBP > 220 mmHg).
RESULTS: A total of 55 patients who received 96 administrations of IV BDE were included in the analysis. The most common individual dose was 10 μg (76.0%) and 45.5% received multiple doses. The median weight-based dose of BDE was 0.14 μg/kg. A significant increase in SBP (median 14.0 mmHg) was noted among all patients following BDE administration compared with baseline (p < 0.001). No significant difference was found in HR following BDE compared with baseline (p = 0.375). Those that received a BDE dose >10 μg were noted to have a significantly greater rise in SBP than those that received 10 μg (30.0 mmHg vs. 11.0 mmHg; p = 0.022). Similarly, patients that received a dose ≥0.2 μg/kg had a significantly greater increase in SBP compared with those that received <0.2 μg/kg (30.0 mmHg vs. 10.0 mmHg; p = 0.048). There were no incidences of severe hypertension following therapy.
CONCLUSION: The utilization of IV BDE in the prehospital setting for acute hypotension resulted in a significant rise in SBP. A dose-response relationship was noted both in terms of a flat-based dose and a weight-based dose, with higher doses yielding a greater change in SBP. Additional investigations are necessary to further explore the most appropriate dose of this agent in this setting and its influence, if any, on clinical outcomes.
METHODS: A retrospective review evaluated patients transported to an academic medical center who had received IV BDE by a single urban EMS system from 2016 to 2020. The primary outcome was to assess the influence IV BDE had on systolic blood pressure (SBP). Secondary objectives were to assess changes in heart rate (HR), the impact of dose variability on SBP, and the incidence of severe hypertension (SBP > 220 mmHg).
RESULTS: A total of 55 patients who received 96 administrations of IV BDE were included in the analysis. The most common individual dose was 10 μg (76.0%) and 45.5% received multiple doses. The median weight-based dose of BDE was 0.14 μg/kg. A significant increase in SBP (median 14.0 mmHg) was noted among all patients following BDE administration compared with baseline (p < 0.001). No significant difference was found in HR following BDE compared with baseline (p = 0.375). Those that received a BDE dose >10 μg were noted to have a significantly greater rise in SBP than those that received 10 μg (30.0 mmHg vs. 11.0 mmHg; p = 0.022). Similarly, patients that received a dose ≥0.2 μg/kg had a significantly greater increase in SBP compared with those that received <0.2 μg/kg (30.0 mmHg vs. 10.0 mmHg; p = 0.048). There were no incidences of severe hypertension following therapy.
CONCLUSION: The utilization of IV BDE in the prehospital setting for acute hypotension resulted in a significant rise in SBP. A dose-response relationship was noted both in terms of a flat-based dose and a weight-based dose, with higher doses yielding a greater change in SBP. Additional investigations are necessary to further explore the most appropriate dose of this agent in this setting and its influence, if any, on clinical outcomes.
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