2nd degree: deep partial Depth: reticular Wet or waxy dry, blisters that easily pop, blanches w/ pressure (delayed)
3rd degree: full thickness Depth: hypodermis Waxy white/grey/charred, dry, no blanching w/ pressure
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Describe how to estimate BSA of burns
Rule of 9s: Estimates percentage of body burned: - Entire head and neck = 9% - Right arm = 9% - Left arm = 9% - Anterior torso = 18% - Posterior torso = 18% - Right leg = 18% - Left leg = 18% - Groin = 1%
Infants: - Head = 18% - Each arm = 9% - Anterior torso = 18% - Posterior torso = 18% - Each leg = 14%
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Describe the parkland formula and what it is used for
For calculating volume of LR for burn patients
3mL x total body surface area of burn (%) x body weight (kg) - First half over first 8 hours - Second half over next 16 hours
Same formula but 4mL instead of 3mL in teenagers/adults
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What rash can be immediate (urticaria) or delayed (vasculitis, rash eruption) that is morbiliform, generalized small red macules and/or papules resembling measles rash
drug eruption
can be fixed: rash shows up in same spot every time that drug is taken
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What is the treatment of a drug eruption
stop offending agent antihistamines
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what rash is an acute, self limiting hypersensitivity reaction triggered by various bacteria, viruses, or meds.
erythema multiforme
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describe erythema multiforme rash
sudden onset symmetrical erythematous macules, papules, and target lesions that favor extremities like palms and soles and extensor surfaces puritic
erythematous/purpuric center w/ or w/o bullae, surrounding halo of lighter erythma and edema and 3rd red ring
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what causes erythema multiforme
type 4 sensitivity reaction HSV usually
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What is the treatment of erythema multiforme
treat underlying cause- stop offending med, acyclovir for herpes
treat symptoms: antihistamines, topical steroids, prednisone for oral lesions
derm referral if uncertain if SJS/TEN
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What rash has different stages of lesions with small red lesions that progress from macules to papules to vesicles to pustules that crust over
all over body and very itchy, fever, malaise, low fever
acyclovir in teens and adults at risk of complications
NO ASPIRIN: reyes syndrome causing swelling of liver and brain
prevent with varivax
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what rash is a maculopapular rash that begins on the head and face and progresses down. symmetric and diffuse. cough, stuffy nose, conjunctivitis, fever
koplik spots (little white spots in the mouth)
measles/Rubeola
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What rash is maculopapular beginning on the head and face and progressing down and is diffuse and symmetric. Not as much fever, cough, etc.
lymphadenopathy postauricular and suboccipital
rubella (rubella virus)
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What rash is generalized and subtle pink that begins several days after a fever resolves. rash begins on trunk and spreads to face.
Roseola
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What causes roseola
HHV-6
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what causes erythema infectiosum/Fifth disease
parvovirus B19
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What rash has a mild viral prodrome with fever then slapped cheek rash with generalized lacy reticular erythematous rash all over body
erythema infectiosum/fifth disease
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describe molluscum and how its treated
firm skin colored round 3-5mm, central umbilication with central curd like core. painless
treatment: benign neglect, direct lesion trauma with cryotherapy, cantharidin, salacylic acid, tretinoin, curettage, imiquimod
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What causes molluscum
pox virus
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describe impetigo
begins with single red papulovesicle progressing to one or many honey-crusted lesions weeping serous drainage around nose and mouth.
bullous impetigo: larger bullae or vesicle with yellow crust
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What is MCO of impetigo
strep and staph (MRSA included)
Consider culture if known MRSA colonized, systemic sx, severe local sx, immunosuppression, lack of improvement with tx
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what is the treatment of impetigo
topical mupirocin ointment
oral keflex if widespread of bullous
if MRSA: bactrim
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what is the treatment of lice
permithrin- leave in hair for 10 min then rinse and repeat in 7 to 14d
suffocation with alcohol
place things that cant be washed in plastic bags for 2 weeks. wash clothes and linens in hot water
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signs of lice
head lice: nits on base of hair, intensely pruritic
body lice: found on seams of clothing, itchy, maculae ceruleae (blue/gray macules)
pubic lice: itchy pubic area with visible nits
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how to treat body and pubic lice
body: good hygiene, wash clothes
pubic: permethrin cream, treat sexual contacts, wash clothes
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describe scabies rash
intensely pruritic, excoriated papules, pustules, curvilinear burrows on intertrigenous zones
commonly seen in finger webs, wrists, axilla, breasts, buttock, penis
confirm with skin scrapings under microscope
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how do you treat scabies
permethrin 5% cream from neck down 8-12hrs then wash off, repeat in 1 week
antihistamines, topical corticosteroids for pruritis
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describe pityriasis rosea
acute, self-limiting, red and scaly exanthem
starts with herald patch (one big scaly pink patch) then 1-2 weeks later gets truncal rash in christmas tree pattern along langer lines. spares palms and soles
lasts 2-12 weeks
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what is the treatment of pityriasis rosea
self limiting
topical steroids, camphor, menthol, antihistamines for itch
acyclovir if severe
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what rash is due to chronic inflammatory autoimmune disease affecting skin and mucus membranes
lichen planus
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what rash has increased incidence with hepatitis C
Allergic: most common, IgE-mediated +/- allergy testing
Non-allergic rhinits: malignancy, pregnancy, vasomotor, mediation-induced, atrophic Usually seen later in age
Vasomotor rhinitis: non-allergic & non-infectious dilation of blood vessels (ex. temperature change, strong smells, humidity)
**Rhinits medicamentosa: caused by overusing nasal decongestants, leading to a rebound affect ""addicted to nasal sprays"" (ex. Affrin)
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Symptoms of allergic vs non-allergic sinusitis
Allergic: pale nasal mucosa due to infiltration of area with eosinophils May have ""allergic shiner"" (purple discoloration around eyes or nasal bridge) May have nasal polyps with cobblestone mucosa of conjunctiva Swollen/red turbinates
Non-allergic: absence of nasal or ocular itching & prominent sneezing Red turbinates Nasal congestion & post nasal drainage are prominent May have year-round symptoms
almost always viral- rhinovirus, influenza, parainfluenza
If bacterial: strep pneumoniae
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What are signs of bacterial rhinitis and not viral
onset of persistent sx >10 days severe symptoms or high fever >102F purulent drainage lasting 3-4 days
worsening symptoms or signs characterized by new onset of fever, headache, increased nasal drainage following URI that lasted 5-6 days and were initially improving "double sickening"
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what are symptoms of rhinitis
nasal inflammation and obstruction discolored nasal drainage absent transillumination of sinuses tenderness over sinuses
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what is the treatment of viral vs bacterial rhinitis
viral: supportive care
bacterial: augmentin 10-14d if sx present 10-14d and worsening
switch to quinolones if no improvement after 3-5 days CT if still no improvement
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what are possible complications of rhinitis
orbital cellulitis, abscess formation, mucocele formation, cavernous sinus thrombosis, osteomyelitis, otitis media
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MCO of viral vs bacterial conjunctivitis
viral: adenovirus
bacterial: strep pneumo, H. flu, Moraxella catarrhalis, staph aureus
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symptoms of viral conjunctivitis
red conjunctiva, watery or mucoserous discharge, gritty pain, burning, or irritation. assoc. with pharyngitis, fever, cough, body aches
cobblestoning of conjunctiva
absence of purulent discharge, pain with EOM, swelling around eye, foreign body sensation
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what diagnostics are done for conjunctivitis
fluorescein stain to r/o corneal abrasion
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what is the treatment of viral vs bacterial vs allergic conjunctivitis
discharge, redness, swelling chemical: day 1 after birth from silver nitrate gonococcal: purulent conjunctivitis with exudate and swelling of lids around 2-5 days after birth chlamydia seen around days 5-7 after birth
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how is opthalmia neonatorum diagnosed
clinical dx culture with gram stain and PCT
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how is opthalmia neonatorum treated
erythromycin eye ointment HSV: ganciclovir gel severe and dont suspect HSV- topical corticosteroids (lotepredenol)
chemical/electrical cautery only if source can be visualized
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symptoms of mastoiditis
fever postauricular tenderness erythema bulging tympanic membrane protrusion of auricle
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how is mastoiditis diagnosed
CT with contrast showing fluid in mastoid air cell
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how is mastoiditis treated
middle ear drainage via myrinotomy IV abx: vancomycin and ceftriaxone if suspect pseudomonas: cefepime or zosyn if complicated: surgical removal of mastoid bone
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difference between periorbital and orbital cellulitis symptoms
periorbital: unilateral ocular pain, red and swollen eyelid, mild fever, inability to open eye, no changes in EOM or visual acuity, no proptosis, no chemosis
orbital: ocular pain, eyelid swelling, systemically ill with fever, pain with EOM, proptosis, chemosis, vision loss, nasal drainage, tenderness
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diagnosis of periorbital vs orbital cellulitis
CT
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cause of periorbital vs orbital cellulitis
periorbital: secondary to another infection, sinus infection MC with staph or S. pyogenes, insect or animal bite
orbital: complication of rhinosinusitis- strep
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treatment of periorbital vs orbital cellulitis
periorbital: oral abx, close follow up in 24hrs, if no improvement consider orbital cellulitis
orbital cellulitis: immediate referral to ED, need IV abx, consider surgery