Chapter 4: Types of Allergy Testing Flashcards
During a Skin Pick Test, a health care provider introduces allergens into the skin to?
To check for a Wheal.
The Wheal is caused by?
An interaction of the antigen and antibody which releases histamine.
Does most cells release histamine during allergic reactions?
Yes.
Intradermal Injections test is performed if?
If the skin prick test results are negative or inconclusive.
What is the first step of Intradermal Injections test?
Patient is injected with small amounts of the allergen between the epidermis and dermis.
What is the second step of Intradermal Injections test?
The area is observed for a reaction in the form of a wheal, redness, or itching.
Does severe reactions can occur with both of this test?
Yes, epinephrine should br administered by order of the provider.
What does Skin Patch Test determines?
Cause of contact dermatitis.
What is the first step of Skin Patch test?
Provider applies a patch onto the skin (usually the back, arms, or abdominal area) that has a diluted allergen on it.
What is the second step of Skin Patch test?
Patch is left on for 48h and removed.
What is the third step of Skin Patch test?
Check the skin up to 48h later for redness or swelling (which indicates a positive reaction).
What is an Antihistamine?
Medication that stops the body’s immune response to allergens.
