A client states that he is "allergic" to poison ivy. Which statement by the client indicates a good understanding of this type of sensitivity?
a. "Drinking 3 liters of water a day will pre-vent kidney damage."
b. "I will always wear a medical alert brace-let for this allergy."
c. "I need to try to avoid coming into contact with poison ivy."
d. "I should carry diphenhydramine (Bena-dryl) with me at all times."
C
Reactions to poison ivy are a type IV hypersensitivity reaction. They are cell mediated by T-lymphocytes in the skin. Avoidance of the offending allergen is the most appropriate interven-tion. The complexes do not form or precipitate in the kidney. This type of hypersensitivity does not represent an immediate life-threatening emergency and does not respond to histamine anta-gonists (diphenhydramine).
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