Epinephrine Dosing Intervals Are Associated With Pediatric In-Hospital Cardiac Arrest Outcomes: A Multicenter Study.

Area of Science:

• Pediatric Critical Care Medicine
• Resuscitation Science
• Pediatric Cardiology

Background:

• Conflicting data exist regarding optimal epinephrine dosing intervals during cardiopulmonary resuscitation (CPR).
• Understanding these intervals is crucial for improving outcomes in pediatric cardiac arrest.

Purpose of the Study:

• To evaluate the association between epinephrine dosing intervals and patient outcomes in pediatric cardiac arrest.
• To test the hypothesis that dosing intervals less than 3 minutes improve neurologic survival compared to intervals greater than or equal to 3 minutes.

Main Methods:

• Secondary analysis of The ICU-RESUScitation Project, a multicenter trial involving 18 pediatric intensive care units (PICUs) and pediatric cardiac ICUs.
• Included subjects were 18 years or younger with an index cardiac arrest, excluding those with fewer than two epinephrine doses, extracorporeal CPR, or intervals >8 minutes.
• Primary exposure was epinephrine dosing interval: <3 minutes vs. ≥3 minutes.

Main Results:

• Among 382 eligible patients, shorter epinephrine intervals (<3 minutes) were not associated with improved survival to discharge with favorable neurologic outcome (aRR 1.10; P=0.48).
• However, shorter intervals were associated with improved sustained return of spontaneous circulation (ROSC) (aRR 1.21; P<0.01).
• Shorter epinephrine dosing intervals also correlated with significantly shorter CPR duration (estimated effect -9.5 min; P<0.01).

Conclusions:

• In pediatric patients receiving at least two epinephrine doses, intervals <3 minutes did not improve neurologic outcomes.
• Shorter epinephrine dosing intervals were associated with increased sustained ROSC and reduced CPR duration.
• Further research may clarify the optimal epinephrine strategy for pediatric CPR.