Dermatological Emergencies Flashcards

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1
Q

Necrotising fasciitis progression

A

Painful erythema
Few days later - skin breakdown
Later - Anaesthesia + blue/grey necrosis
Hypotension + Fever

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2
Q

Types of necrotising faciitis

A

Type I

Type II

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3
Q

Type I necrotising faciitis

A

Polymicrobial

Mix of aerobic and anaerobic pathogens

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4
Q

Type II necrotising faciitis

A

Monomicrobial:

Staph Aureus - most common
GAS

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5
Q

Mx of necrotising faciitis

A
Urgents surgical referral
Debridement
Broad spectrum IV abx
Haemodynamic support
Amputation
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6
Q

Abx for necrotising faciitis

A

Carbapenam or beta lactamase inhibitor bacteria
+ Clindamycin
+ MRSA cover (Vancomycin)

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7
Q

When to think about necrotising faciitis

A

Disproportional painful erythema
Erythema with purple/grey tinge
Systemically unwell

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8
Q

Other name of meningococcaemia

A

Meningococcal septicaemia

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9
Q

RFs for Meningococcal septicaemia

A

Immunocompromised

Asplenic

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10
Q

Sx of Meningococcal septicaemia

A
Fever
Non blanching rash
Headache
N/V
Neck stiffness
Photophobia
Seizure
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11
Q

Rx of Meningococcal septicaemia

A

Ceftriaxone IV 7 days

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12
Q

Close contact prophylaxis for Meningococcal septicaemia

A

Rifampicin

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13
Q

Complications of Meningococcal septicaemia

A

Seizures
DIC
Raised ICP

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14
Q

Scale of Stevens-Johnson syndrome

A

Erythema multiforme
Stevens-Johnson syndrome - mucus membrane involvement
Toxic Epidermal Necrolysis

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15
Q

Sx of Stevens-Johnson syndrome

A

Flu like Sx
Few days later - target rash non itchy
Burning/peeling of skin
Ulcers - genital tract, mouth/throat, corneal

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16
Q

Complications of Stevens-Johnson syndrome

A

Death
Blindness
Skin scarring
Secondary cellulitis

17
Q

Mx of Stevens-Johnson syndrome

A

Stop causative medication / abx for infection
Moisturiser
Fluids
Corticosteroids - skin inflammation

18
Q

Medication causes of Stevens-Johnson syndrome

A

Allopurinol
Carbemazepine
Lamotrigine
Cotrimoxazole

19
Q

Viral causes of Stevens-Johnson syndrome

A

Mumps
HSV
EBV
Coxsackie virus

20
Q

RFs for Stevens-Johnson syndrome

A

Immunosuppression
Previous Stevens-Johnson syndrome
FHx of Stevens-Johnson syndrome

21
Q

Prognosis of Stevens-Johnson syndrome

A

Skin grows back depending on severity

Weeks to months

22
Q

Erysipelas

A

Distinct superficial cellulitis of face

23
Q

Eczema Herpeticum Sx

A
Punched out blisters
Painful
Clusters
Systemically unwell
Lymphadenopathy
24
Q

Causes of Eczema Herpeticum

A

HSV

HSV 1 most common

25
Q

Complications

A

Scarring
Herpetic keratitis -> blindness
Secondary bacterial infection

26
Q

Mx of Eczema Herpeticum

A

IV acyclovir
Supportive care - fluids, analgesia, antipyretics

Avoid corticosteroids until recovered

27
Q

Duration of Eczema Herpeticum

A

Infection 16 days

Lesions heal over 2 - 6 weeks

28
Q

Transmission of Eczema Herpeticum

A

Skin to skin

29
Q

Anaphylaxis pathophysiology

A

Severe type I IgE mediated hypersensitivity reaction

Mast cells + Basophils

30
Q

Anaphylaxis Mx

A

Adrenaline IM 0.5 ml 1 in 1000
Hydrocortisone 200 mg
Chlorphenamine 10 mg

31
Q

Angioedema

A

Can occur w/o anaphylaxis (swelling alone)

Commonly caused by ACEi