Scaly Dermatitis Flashcards
What are 5 medications that can be used to treat scaly dermatitis?
coal tar zinc pyrithione selenium sulfide ketoconazole 2% shampoo salicylic acid (SA)
what is coal tar? how does it work?
keratolytic and antiseptic; may also have anti-pruritic effects
works by increasing time it takes for cells to turnover because skin cells aren’t forming properly and start to clump together
what are the side effects of coal tar?
acne folliculitis stains to skin/hair photosensitization irritant contact dermatitis
what are two downsides to using coal tar?
unpleasant odour/colour, can stain
known to contain some human carcinogens
what is zinc pyrithione?
cytostatic (decreases rate of epidermal skin cell replication) and keratolytic
also has bacteriostatic and fungistatic properties
what is a benefit of using zinc pyrithione?
very well tolerated (few side effects)
what is selenium sulfide?
keratolytic, slows down scale production and epidermal proliferation; some fungicidal/static properties
what is one downside to using selenium sulfide?
frequent use tends to leave a residual odour, an oily scalp, and hair loss
what is ketoconazole 2% shampoo?
cytostatic and fungistatic
what is SA?
keratolytic
causes loosening and flaking off of skin (decreases pH, which increases hydration of keratin, facilitating loosening and removal
what is a precaution with SA?
not to be used on over 20% of BSA as it may cause salicylate toxicity (tiredness, ringing in ears, GI symptoms)
what is psoriasis?
life-long chronic inflammatory disease of the skin involving high turnover rate of skin cells
what are some risk factors for psoriasis?
genetic predisposition skin trauma environmental (alcohol, obesity, stress, preggo) medications (beta-blockers, NSAIDs) infections (resp, strep, HIV)
what are 4 signs and symptoms of psoriasis?
thickened red plaque with silvery-white scales
bleed easily
symmetrical lesions
minimal itching
what are some assessment questions to ask the pt? (7 points)
1) how severe are the symptoms
2) duration of irritation
3) area of involvement
4) how often do symptoms occur
5) med history
6) has anything been tried yet
7) has it been diagnosed by a physician
what are some red flags for psoriasis? (6 points)
1) 3% of body surface area involved
5) severity and type of psoriasis (ie: mild vs severe)
6) location of lesions: hand, forearms, face
What are 5 different modes of therapy for psoriasis?
topical therapy phototherapy systemic therapy biologic therapy combination therapy