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Is There an Optimal Training Interval to Improve the Correct Use of Adrenaline Auto-Injectors?

Background: Accurate use of adrenaline auto-injectors (AAIs) for anaphylaxis is critical to decrease mortality and morbidity. Objective: In this study, we aimed to assess user knowledge of AAIs and evaluate the factors that affect their correct use. Methods: The study involved caregivers of pediatric patients diagnosed with anaphylaxis who were trained with trainer injectors up to 24 months ago. The demographics of the caregivers, anaphylaxis history of the patients, usage of AAIs in the case of anaphylaxis, and the reasons for not using AAIs in anaphylaxis were evaluated. Users were asked to demonstrate the use of Penepin® with a trainer injector. Results: Fifty-nine caregivers were enrolled in the study. Forty-seven (79.7%) users stated that they always carry AAIs with them. Forty-one (69.5%) of the users demonstrated all steps of the use of AAIs. The time from the last AAI training was the most significant parameter affecting the ability to use AAIs correctly (OR 0.678, 95% CI 0.546–0.841, p < 0.0001). AAI training every 6 months results in the proper usage of AAIs, with 96% probability. Thirty (50.8%) caregivers stated that anaphylactic reactions occurred in their children after the last AAI training. Of these, 16 (53.3%) users stated that they did not use an AAI for the anaphylactic reaction. The most common reason (50%) was not carrying an AAI on their person. Conclusion: Training users at least every 6 months is associated with the proper application of AAIs. Although regular training increases the frequency of AAI use in anaphylaxis, awareness of carrying AAIs is the most important factor for usage of AAI in anaphylaxis.