Certified Pediatric Emergency Nurse (CPEN) Practice Exam

Anaphylaxis is a severe and potentially life-threatening allergic reaction that requires immediate recognition and intervention. The signs indicating a need for immediate intervention are critical to understanding how to respond effectively in an emergency.

Swelling of the throat is a significant sign because it can indicate airway compromise, which poses a serious risk of respiratory failure. When the throat swells, it can obstruct air passage, making it difficult for the individual to breathe properly.

Widespread hives can be a part of an allergic reaction, but in the context of anaphylaxis, it can signify the release of histamine and other mediators that lead to more severe symptoms. While hives alone may not always necessitate immediate intervention, their presence along with other symptoms, such as difficulty breathing or swelling, can indicate the severity of the reaction.

Difficulty breathing is a critical sign that indicates that the airways are being compromised, either due to swelling or bronchoconstriction, which is common in anaphylactic reactions. It represents a direct threat to the patient’s ability to breathe and requires rapid intervention.

Since all three signs—swelling of the throat, widespread hives, and difficulty breathing—can signify a progression toward more severe symptoms of anaphylaxis that can be life