Sacramento County EMS Protocols Practice Test 2025 – Complete Exam Prep

Question: 1 / 400

What is the definition of anaphylaxis?

A systemic response to an antigen affecting only one organ system

A mild allergic reaction not involving vital signs

A systemic response to an antigen involving two or more organ systems

Anaphylaxis is defined as a systemic response to an antigen that involves two or more organ systems. This severe allergic reaction can potentially lead to life-threatening symptoms affecting multiple parts of the body, including the respiratory, cardiovascular, gastrointestinal, and integumentary systems. Symptoms may include difficulty breathing, swelling of the face and throat, rapid heart rate, a drop in blood pressure, abdominal pain, and hives or rash. Recognizing the multi-system involvement is key to diagnosing and treating anaphylaxis effectively, as it requires prompt medical intervention, typically with epinephrine, to mitigate the physiological effects and prevent further deterioration of the patient's condition.

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An isolated respiratory response to an allergen

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