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12 Cards in this Set
- Front
- Back
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describe the difference b/t type one and type 4 allergic reactions.
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type one is immediate and is due to the release of substances such histamine. this will take place in minutes to hours.
type four is a delayed reaction caused by sensitized lymphocytes (t cells). this takes place hours to days later. |
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what is the term used for the inflammation due to the skin coming into contact with an allergic agent.
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contact dermatitis
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what are the types of contact dermatitis
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irritant and allergic contact dermatitis
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what is the most common type of contact dermatitis?
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irritant contact dermatitis.
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describe irritant contact dermatitis
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this is when the irritant directly damages the skin this is not an allergic attack. typically could be caused by chemicals. typically no itching
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describe allergic contact dermatitis
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Here there is itching and involves a cell mediated immunity response. examples is poison ivy, latex, drugs, could also be chemical like irritant dermatitis but here it is not directly damaging the skin.
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treatment for allergic contact dermatitis?
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remove allergen, cold compresses 4-6 days, topical steroids 5 - 10 days (something like hydrocortisone), consider oral antihisamine, and ocular lubricants
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what type of dermatitis is associated with hereditary disorders such as hay fever. this one is usually just an itchy patch of skin on the face scalp, or knees
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atopic
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what is the name for itchy welts or hives?
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urticaria
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what is the clinical features of urticaria?
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intense pruritus, raised welts surrounded by erythematous flare.
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when skin appears normal but deeper layers of the skin are edematous, there is little pruritus but may have a painful burning feeling is called what?
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angioedema
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treatment for urticaria and angioedema
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cold compresses, antihistamine, systemic steroids
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