EMT-Chapter 21-Anaphylactic Reactions

  1. Anaphylactic Reaction
    The life-threatening allergic reaction.
  2. Immune System
    The body'd defense mechanism against foreign substances (antigens), including those that cause allergic reactions (allergens)
  3. Immune Response
    Production of antibodies to fight foreign substances. An allergic reaction or life-threatening anaphylactic reaction(anaphylactic shock; anaphylaxis) is an abnormal response.
  4. Hypersensitivity
    Altered reactivity to an allergen that causes an allergic reaction, after the sensitization (the process of developing hypersensitivity on first exposure to an antigen) that occurs in the first exposure.
  5. Histamine
    • Chemical mediator, released from mast cells, in an anaphylactic reaction.
    • Causes bronchoconstriction, vasodilation, and an increase in capillary permeability (leakage)
  6. Anaphylactoid Reaction
    • Reaction similar to an anaphylactic reaction that may occur on the first exposure without prior sensitization.
    • Signs and symptoms are the same.
    • The primary difference will be that the patient will never have a previous exposure.
  7. Malaise
    A general feeling of weakness or discomfort.
  8. Endotracheal Intubation
    • Placement of a tube down the trachea to facilitate airflow to the lungs.
    • Provided by ALS
  9. Hives
    Raised bed blotches associated with allergic and anaphylactic reactions
  10. Epinephrine
    • A natural hormone that, when used as a medication, constricts blood vessels to improve blood pressure, reduces leakage from blood vessels, and relaxes smooth muscle in the bronchioles.
    • Both an alpha and beta drug
    • Adult dose: 0.3mg
    • Pediatric dose: 0.15mg
Card Set
EMT-Chapter 21-Anaphylactic Reactions