EENT Flashcards
Tx dacrocystitis
= blockage/infection of medial canthal lacrimal sac = swelling/erythema +/- purulence
Tx = Clindamycin
Crusting, scaling, & red-rimming of eyelids bilaterally = ?
Blepharitis = inflammation of the eyelids - BILATERAL
Anterior = skin & base of eyelash - more likely infectious (staph), viruses, or seborrheic
Posterior = moeibomian gland dysfunction (a/w rosacea and allergic rhinitis)
Tx anterior = eyelid hygiene = warm compresses, +/- abx
Tx posterior = eyelid higiene, massage
Stye (hordeolum) vs chelazion?
Both cause swelling/lump in eyelid
Chelazion is NOT painful & stye is SUPER painful, red, warm etc.
Chelazion is under the eyelid itself, stye is at the lid margin
Stye = sudden onset
Chelazion is larger, firmer (= RUBBERY nodule) slower growing than a stye (= abscess)
Tx for stye = warm compresses
Tx for chelazion = eye hygiene (warm compresses, washing etc)
Abx may be necessary with stye if actively draining but are usually not necessary with chelazion
Pterygium vs pinguecula
Ptyergium = triangular-shaped growing fibrovascular mass on inner corner of eye & grows laterally
A/w inc UV exposure, sand, wind dust exposure etc
Mnemonic: Pterygium is like a terrarium that grows to inner eye
Tx - needs removed if affects vision. Otherwise observe.
Pinguecla = yellow deposit of fat/protein on nasal side of sclera that does NOT grow
Pinguecula has a C in it & it’s a Cute lil deposit that just needs observed
Globe rupture - dx, signs & tx
Dx:
Hx penetrating trauma, +enopthalmos or exopthalmos,
+ seidel’s sign (fluorescein dye is parted by a stream of clear aqueous humor streaming from the anterior chamber) - DO NOT USE FLUOROSCEIN IF SUSPECT THO….
Teardrop or irregularly shaped pupil
Tx: RIGID eye shield, immediate ophtho consult, IV abx, leave impaled objects in place
DO NOT PRESSURE PATCH - EYE CUP & EMERGENT REFERRAL
If hyphema, keep at 45 deg angle to prevent RBC staining of cornea
Orbital floor blowout fx -CP, dx, tx
Fracture of orbital floor 2/2 TRAUMA - can lead to entrapment of eye structures
Diplopia w/ upward gaze = entrapment of inferior rectus muscle
Orbital emphysema = eyelid swelling after blowing nose 2/2 air from maxillary sinus
Anesthesia to anteriomedial check 2/2 stretching of infraorbital nerve
Dx: CT
Tx: Nasal decongestants, no nose blowing, steroids, antibiotics (unasyn or clinda)
Macula is responsible for what kind of vision?
Central vision
Detail
Color vision
C = central vision, color vision
Dry macular degeneration
Gradual breakdown of the maucla = gradual blurring of central vision
Dry = DRUSEN bodies = small, round, yellow-white spots on the outer retina (scattered, diffuse)
Drusen = DIFFUSE spots
Drusen = accumulation of waste products from the retinal pigment epithelium
Wet macular degeneration
Called wet b/c there’s neovascularization and exudates
New abnormal vessels grow under the central retina which leak & bleed = retinal scarring –> more rare than dry but progresses more rapidly
CP macular degeneration
B/l blurred central vision & loss of detail/color
Scotomas (blind sports, shadows)
Metamorphopsia (strait lines appear bent, can test w/ amsler grid)
Dry also = drusen bodies = DIFFUSE small round yellow-white spots on outer retina
Dx of wet macular degenration
Fluorescein angiography
Tx dry macular degeneration
Amsler grid at home to monitor stability
Zinc, and vitamins A, C, E = slows progression
Tx wet macular degeneration
Intravitreal anti-angiogenics = Bevacizumab
`= VEGF inhibitors = dec neovascularization
Patho diabetic retinopathy
Sugar attaches to collagen of blood vessels = capillary wall breakdown (glucose is toxic to our vessels!) = retinal ischemia = edema
Types of diabetic retinopathy
- Nonproliferative = microaneurysms = leak & cause… blot & dot hemorrhages, flame-shaped hemorrhages, cotton wool spots, hard exudates, retinal vein beading (tortuous & dilated veins). NOT as/w vision loss
- Proliferative = neovascularization = new abnomral blood vessel growth, vitreous hemorrhage –> Tx = same as wet macular degeneration = VEGF inhibitors & strict glucose control
- Maculopathy - macular edema and exudates = blurred central vision & central vision loss - can occur at any stage –> 2/2 microaneurysm leakage = edema and damage
Cotton woll spots a/w? What are they actually?
A/w non-proliferative diabetic retinopathy (also a/w hypertensive retinopathy stage III)
A type of “soft” exudate from leaking of microaneurysms & nerve layer microinfarctions
= Fluffy white gray spots = why they’re named cotton wool spots - larger and more irregularly shaped than the small round drusen bodies at edge of retina 2/2 dry macular degeneration
Hard exudates - what are they? A/w?
Hard exudates are yellow spots with SHARP margins - well-demarcated (unlike fluffy cotton spots)
A/w nonproliferative diabetic retinopathy
Due to microaneuysm leakage - lipids leak out and form the hard exudates - seen in hpertensive retinopathy as well
Vitreous hemorrhage = what? a/w?
Vitreous hemorrhage is a/w proliferative diabetic retinopathy
It is
Flame shaped and blot hemorrhages are what? a/w what?
they are small hemorrhages in the eye 2/2 to microaneurysm rupture and vascular occlusions
Seen in diabetic retinopathy and stage III HTN retinopathy
They are a/w cotton wool spots b/c distal to the hemorrhage or ischemia the cotton wool spot is created
Is non-proliferative diabetic retinopathy a/w vision loss?
NO
What are dilated tortious retinal artery/veins a sign of?
Neo-vascularization ….
“Proliferation of the endothelial cells of retinal veins results in marked changes in the caliber of the veins with formation of tortuous loops”
Occurs in diabetic retinopathy AND hypertensive retinopathy
HTN retinopathy = ?
Damage to retinal blood vessels 2/2 long-standing HTN
Grade I HTN retinopathy
Arterial narrowing - abnl ligt reflexes on dilated tortuous arteroile shows up as colors:
Copper-wiring (moderate) Silver wiring (severe)
Grade II HTN retinopathy
AV nicking (venous compression at arterial-venous junctions 2/2 increased arterial pressure)
Grade III HTN retinopathy
Retinal hemorrhages (“flame-shaped”) and associated cotton wool spots
Note stages are alphabetical - Artrial narrowing, AV nicking, Cotton wool, flame hemorrhages, then papilledema!
Stage IV HTN retinopathy
Papilledema
Normal cup:disc ratio
<0.5
Retinal detachment - etio
Etio - 3 types:
1. Rhegmatogenous - MC type= retinal tear - RF = myopia & cataracts
- Traction - adhesions separate the retina from its base - proliferative DM retinopathy, trauma
- Exudative (serous) - fluid accumulates behind retina & = detachment - HTN, central retinal v. occ, papilledema
Flashes of light come first = retina tugging then the “curtain over eye” as it actually detaches
MCC = VITREOUS DETACHMENT/hemorrhage - vitreous separation tears hold in retina - vitreous detachment caused by neovascularization (proliferative DM retinopathy
Retinal detachment dx, tx
Dx:
Retinal tear = detached tissue”flapping” in vitreous humor
+ SHAFER’s sign = clumping of brown-colored pigment cells in the anterior vitreous humor resembling tobacco dust
Tx:
OPHTHO EMERGENCY
Keep supine, don’t use miotic drops
Laser, cryotherapy, ocular surgery
First thing to check in EVERY pt with eye complaint (besides chemical burns)
Visual acuity
If got chemical in eye then wash out first but
ALL OTHERS = get visual acuity FIRST
Common antihistamine eye drop for itching/redness in viral or allergic conjunctivitis
Olopatadine = H1 blocker eye drop = benadryl for the eyes
Viral conjunctivitis a/w what other PE finding?
Preauricular LAD
BILATERAL
Gonococcal conjunctivitis
ADMIT
IV CEFTRIAXONE and topical abx
OPHTHO EMERGENCY!
MCC bacterial conjunctivitis
staph aureus
Dx bacterial conjunctivitis
Clinical dx BUT you must still do fluorescein staining to rule out an abrasion & keratitis!!!
Allergic conjunctivitis pathognomonic finding
Cobblestone appearance to inner eyelid and upper eyelid, itching, tearing, redness, bilateral
What is pheniramine and naphazoline drops?
They are an antihistamine and decongestant eye drop used for allergic conjunctivitis
Orbital cellulitis - occur when? CP? Dx? Tx?
Occur: MC ofter sinus infection (ethmoid) - staph, s. pna, gabhs, h. flu or after dental and facial infections - MC in CHILDREN
CP: Decreased vision, pain with ocular movement, proptosis, eyelid erythema & edema
Tx: emergent referral, admission for systemic abx & orbital imaging
Preseptal (preorbital) cellulitis vs orbital?
Orbital = pain with EOM, and VISUAL changes
Pre-orbital (infection of eyelid and periocular tissue) & NO pain with EOM, NO visual changes
Si/sx keratitis (corneal ulcer)
Corneal ulcer AKA keratitis
Corneal ulceration/defect on slit lamp exam
Ciliary injection (limbic flush)
Tx: Cipro drops
DO NOT PATCH EYE
There are various types of keratitis, but most commonly it occurs after an injury to the cornea, dryness or inflammation of the ocular surface or contact lens wear.
PE bacterial keratitis
Hazy cornea, ulcer, +/- hypopyon
Tx: CIPRO DROPS - DO NOT PATCH EYE
Uveitis (iritis)
Autoimmune dz, unilateral
CP: Pain w/ direct & consensual light in BOTH eyes b/c iris will constrict (pain) & dilate (pain) along with the unaffected eye when light is shone in unaffected eye. Also inflammatory cells (WBC) & flare (protein) in aqueous humor
IF ALL OF THE FLARE IS AROUND THE IRIS
= LIMBIC FLUSH OR UVEAL FLARE = BAD
(SLCERA IS CLEARER)
Tx:
URGENT referral for topical steroids & cycloplegic drops for pain (cyclopentolate or homatropine)
Workup: HLA-B27 (a. spondylitis), ANA (SLE), RPR (syphilis), ESR (general inflammation), CCP (RA)
BFTP - SARCO-Not ME mnemonic, the A = anterior uveitis = one of CP of sarcoidosis AI dz!
Scary reasons for red eye
Red eye w/ ciliary injection = ALL SCARY:
Corneal ulcer (keratitis)
Iritis (uveitis)
Acute angle closure glaucoma
Cataract -what is it? RF, CP, d/dx, Tx
What: lens opacification
RF: Age, cigs, sun, DM, steroids, ToRCH syndrome
CP: Painless loss of vision over months to years - one or both eyes, reduced visual acuity on exam, NO RED REFLEX
PE: Absent red reflex, opaque lens
Tx: Surgical - done when dec vision affects ADLs
Ddx: Retinoblastoma - absent red reflex + white pupil