Test 4 ENT Flashcards
(188 cards)
Anterior blepharitis
Inflammation of the eyelid
S. aureus or epidermidis
Seborrheic
From direct bacterial infection & response against bacterial toxins
Delayed hypersensitivity rxns to bacterial antigens
Posterior blepharitis
Inflammation of eyelids
Dysfunction of meibomian glands
S/S blepharitis
- Burning
- Itching
- Foreign body senstaion
- Crusting of the eye lashes
- Erythematous lid margins
- Scaling lids
Risk factors of blepharitis
- Rosacea
- Eczema
- Prior lid injury
What would you see with slit lamp exam of blepharitis?
Usually bilateral may be asymmetric
- Lid erythema
- Lid telangiectasia
- Oily collerettes base of lashes
- Papules
- Pustules w/ rosacea
Tx blepharitis
- Warm compresses 2x/day
- Eyelid scrubs after compresses
- Anterior - Topical abx if infected (erythromicin/bacitracin)
Posterior - oral doxycyline
What is the most common orbital Fx?
Blowout Fx
Occurs with blunt force trauma to globe or orbital rim
What is the weakest area for orbital Fx?
Medial wall & orbital floor
-lamina papyracea
S/S Blowout Fx
Blunt trauma
- Diplopia on upgaze
- Periorbital ecchymosis & edema
- Anesthesia of maxillary teeth & upper lip
- Step off deformity over infraorbital ridge
- Orbital crepitus
How to Dx blowout Fx?
- Plain skull XR w/ Waters & Caldwell views
- Teardrop sign
CT scan needed to Dx & determine extent of damage (coronal & sagittal views)
Tx blowout Fx
Surgery for persistent diplopia & endopthalmitis
Refer
MCC of cataracts & other causes ?
Aging
- Trauma
- Metabolic disorders
- Infections (rubella)
- Medications
- Congenital problems
What is the MCC of blindness in the world?
cataracts
What causes cataracts?
Changes in the lens protein affects how the lens refracts light, reducing clarity & visual acuity
May cause color to turn yellow, green, brown or white
S/S cataracts
- Painless blurry vision or vision loss
- Glare
- Myopia
- Monocular diplopia
- Absent red reflex
- Leukoria
How to Tx cataracts?
- Surgery w/ intraocular lens implant
May just remove it w/o implant
Refer
What is a chalazion?
Idiopathic, sterile chronic granulomatous inflammation of the meibomian gland caused by a foreign body reaction to sebum
What causes chalazion?
- Chronic process of that results from an inflammatory foreign body reaction to sebum
- Blockage of normal drainage glands, especially at at the eyelid margin
- Blepharitis, acne rosacea or hordeolum may contribute to development
Dx chalazion
- Nontender, palpable localized swelling
- Swelling points to the conjunctival surface
- No signs of inflammation
Tx chalazion
- Warm compresses and lid scrubs
If recurrent - refer for incision & curettage
What is the MCC of acute conjunctivitis, & others?
Adenovirus
1. Bacterial Streptococcus pneumoniae Haemophilus influenza Staphloccus aureus Neisseria gonorrhea Chlamydia trachomatis 2. Viral Herpes simplex virus type 1 and 2 Picornaviruses 3. Allergies 4. Chemical 5. Irritative
Who more commonly gets bacterial conjunctivitis?
Kids
Adults usually get viral
S/S Conjuncitivits
- Foreign body sensation
- Burning
- Itching
- Photophobia
- URI
- Family member with same symptoms
- Tearing
- H/o cold sores
- Crusting
- Lids stuck shut in the morning
- Hyperemia
- Pseudoptosis
- Preauricular LAD
Dx conjuncitivitis
- Rapid adenovirus immunoassay kit
2. Bacterial or viral culture