Thursday, October 30, 2008

Stapedectomy

It is a surgical procedure in which the stapes is removed and replaced with a prosthesis, a piston usually made of teflon/stainless steel/gold. Its a mode of treatment for otosclerosis (otospongiosis). Another procedure, stapedotomy is done sometimes (a hole is punched into the footplate of stapes and the implant fixed there).

Indications
  1. Conductive deafness due to fixation of stapes.
  2. Air bone gap of at least 40 dB.
  3. Presence of Carhart's notch in the audiogram of a patient with conductive deafness.
  4. Good cochlear reserve as assessed by the presence of good speech discrimination.
Contraindications
  1. Poor general condition of the patient.
  2. Only hearing ear.
  3. Poor cochlear reserve as shown by poor speech discrimination scores
  4. Patient with tinnitus and vertigo
  5. Presence of active otosclerotic foci (otospongiosis) as evidenced by a positive flemmingo sign.
  6. Conductive deafness due to Ehlers-Danlos Syndrome (EDS)
Complications
  1. Facial palsy
  2. Vertigo in the immediate post op period
  3. Vomiting
  4. Perilymph gush
  5. Floating foot plate
  6. Tympanic membrane tear
  7. Dead labyrinth
  8. Perilymph fistula
  9. Labyrinthitis
  10. Granuloma (Reparative)

Sunday, October 19, 2008

Chronic Pharyngitis

Definition
It is a chronic inflammatory condition of the pharynx characterised by hypertrophy of the mucosa, seromucinous glands and sub epithilial lymphoid follicles.
2 types
  1. Chronic catarrhal pharyngitis
  2. Chronic hypertrophic (granular) pharyngitis
Aetiology
  1. Prolonged/Repeated infections
  2. Mouth breathing (due to any reason)
  3. Chronic irritants (Eg. tobbacco chewing, ciggarettes etc)
  4. Faulty voice production.
  5. Environmental pollution.
Clinical Features
Symptoms
  1. Pain in throat
  2. Foriegn body sensation in throat
  3. Tiredness of voice
  4. Cough
Signs
  1. Congestion of posterior pharyngeal wall, which may have red nodules. (Chronic hypertrophic/granular pharyngitis)
  2. Hypertrophy of lateral pharyngeal bands.
  3. Increased mucous secretions may cover the mucosa.
Treatment
  1. Identification of cause and its correction.
  2. Warm saline gargles.
  3. Mandl's throat paint is useful in preventing secondary infections.
  4. Cautery of lymphoid granules.

Tuesday, October 7, 2008

Glaucoma Surgeries

  1. Canaloplasty
  2. Laser trabeculoplasty
  3. Nd:YAG Laser peripheral iridotomy
  4. Diode laser cycloablation
  5. Trabeculectomy
  6. Glaucoma drainage implants