Allergic Contact Dermatitis Flashcards

1
Q

repeated exposure to milder irritants causing more resistance to irritants

A

hardening effect

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2
Q

what do you apply to alkali irritant causing dermatitis

A

weak acid

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3
Q

alkalis to skin

A

dissolve keratin

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4
Q

acids to skin

A

corrosive

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5
Q

preservation of eggs

A

sodium silicate (water glass)

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6
Q

weaker acids are

A

astringent

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7
Q

more widely used acid than others

A

sulfuric acid

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8
Q

powerful oxidizing substance

A

nitric acid

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9
Q

strongest inorganic that can dissolve glass

A

hydrofluoric acid

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10
Q

how to neutralize hydrofluoric acid

A

hexafluorine -> 10% calcium gluconate & magnesium oxide

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11
Q

protoplasmic poison

A

phenol (carbolic acid)

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12
Q

white eschar on the surface of the skin

A

phenol (carbolic acid)

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13
Q

absorbed phenol can cause

A

glomerulonephritis

arrhythmia

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14
Q

phenol is neutralized with

A

65% ethyl or isopropyl alcohol

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15
Q

airborne contact dermatitis may lead to

A

generalized exfoliative dermatitis

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16
Q

stellate ganglion blockade

gabapentin

A

capsaicin

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17
Q

mixture of tear gas in trichloroethane and various hydrocarbons resembling kerosene

A

mace

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18
Q

small straw colored follicular plugs and papules on the malar crescent, retro auricular areas earlobes neck shoulders and scrotum

A

chloracne

19
Q

acute stage of chloracne

A

chemical burn

20
Q

chronic stage of chloracne

A

hyperpigmentation
hirsutism
skin fragility

21
Q

usual method of exposure for chloracne

A

direct contact

22
Q

chloracne histologically

A

loss of sebaceous glands

23
Q

frequent cause of occupational dermatitis in machine tool operators

A

lubricating and cutting oils (hydrocarbons)

24
Q

cause 10% of occupational dermatitis

A

solvents

25
Q

systemic drug related intertriginous and flexural exanthema (SDRIFE)

A

baboon syndrome

26
Q

allergens bind with selfproteins to create complete antigen

A

sensitization phase

27
Q

occurs upon repeated exposure to the allergen

A

elicitation phase

28
Q

most frequent site for nail polish dermatitis

A

eyelid dermatitis

29
Q

toxicodendron contains

A

uroshiol

30
Q

first symptom in toxicodendron dermatitis

A

marked pruritus

31
Q

most striking diagnostic feature of toxicodendron dermatitis

A

linear grouping of vesicles

32
Q

what to avoid in toxicodendron dermatitis treatment

A

antihistamine ointments

“caine” anesthetics

33
Q

prevent or diminish experimentally produced poison ivy dermatitis

A

quaternium-18 bentonite

34
Q

most frequently caused by nickel and chromates

A

metal dermatitis

35
Q

diagnosis for nickel dermatitis

A

positive patch test reaction

36
Q

primary irritants or as sensitizers to produce allergic contact dermatitis

A

chromium

37
Q

frequent cause of chrome dermatitis

A

hexavalent chrome compounds

38
Q

may act as irritants and as sensitizers

A

mercury

39
Q

most common sensitizer (accelerator)

A

thiuram mix

40
Q

most often the cause in shoe allergy

A

mercaptobenzothiazole

41
Q

cause depigmentation of the skin and ACD

A

hydroquinone antioxidants

42
Q

identified to cause half of unsuspected cases of allergic dermatitis

A

myroxylon pereirae (Balsam of Peru)

43
Q

common cosmetic in india, smeared in forehead

A

kumkum