14. csom tt kk
TRANSCRIPT
Chronic Suppurative Otitis Media:
Tubotympanic Disease (CSOM TT, COM Mucosal
type)Dr. Krishna Koirala
2016-05-03
Definition
• Pyogenic infection of middle ear
cleft mucosa lasting for more than
3 months characterized by
persistent perforation of pars
tensa of tympanic membrane, ear
discharge and decreased hearing
Tubo-tympanic vs. Attico-antral
Perforations of Pars Tensa in CSOM TT
Involves only one quadrant or < 10% of pars tensa
Small perforation
Medium perforation
Involves two quadrants or 10 – 40 % of pars tensa
Large perforation
Retraction of pars Tensa of TM
Grade I retraction• Dull, lusterless T.M.• Prominent annulus• Cone of light absent• Prominent lateral
process• Handle of malleus
medialized• Malleal folds sickle
shaped
Grade II retraction
TM touches the incus
Grade III retraction
TM touches the promontory (atelectasis) but mobile on Valsalva
maneuver or Siegelization
Grade IV retraction
TM firmly adherent to promontory & immobile on Valsalva maneuver or Siegelization
Predisposing factors for CSOM TT
• Upper respiratory tract infection (recurrent)
• Upper respiratory tract allergy• Pre-existing otitis media with effusion• Cleft palate• Immune deficiency: diabetes, AIDS • Poor socio-economic status
Bacteria responsible
• Staphylococcus aureus
• Pseudomonas aeruginosa
• Klebsiella
• Proteus
• Streptococcus
• Bacteroides
Routes of infection
1. Via Eustachian tube
– U.R.T.I., nose blowing,
regurgitation of milk
2. Via tympanic membrane perforation
– Following A.S.O.M. or post-
traumatic
3. Haematogenous (rare):
exanthematous fever
Pathological Changes1. Eardrum
– Central perforation; myringosclerosis
2. Ossicles– Destruction (hyperemic
decalcification)– Tympanosclerosis, Fibrosis +
Adhesions
3. Middle ear mucosa: edematous, pale, congested
4. Mastoid bone: sclerosis
Clinical Features• Ear discharge: intermittent, profuse,
mucoid to muco-purulent, whitish, odorless, not blood-stained
• Hearing Loss: – Usually conductive (25-50 dB) but
might be normal in small, dry perforations
– Round window shielding by ear discharge leads to better hearing in acute exacerbations
• Tympanic membrane: central perforation
Stages of Tubotympanic disease
Stage Otorrhoea
Eardrum perforatio
n
Last ear discharge
Active Present Present -
Quiescent
Absent Present < 6 months
Inactive Absent Present > 6 months
Healed Absent Absent -
Investigations for CSOM TTD
• Examination under microscope
• Ear discharge swab: for culture
sensitivity
• Pure tone audiometry
• Patch test• X-ray mastoid: B/L 300 lateral oblique
(Schuller) (Done when cortical mastoidectomy is required in CSOM TT not responding to antibiotics)
Examination under microscope• Confirmation of otoscopic
findings• Epithelial migration at
perforation margin• Cholesteatoma &
granulations • Adhesions &
Tympanosclerosis • Assessment of Ossicular
chain integrity• Collection of discharge for
culture sensitivity
Pure Tone Audiometry• Uses
– Presence of hearing loss– Degree of hearing loss – Type of hearing loss – Hearing of other ear – Record to compare hearing post-
operatively– Medico legal purpose
Patch Test• Performed when deafness is
around 40-50 dB– Do pure tone audiometry: for hearing
threshold – Put Aluminum foil patch over T.M.
perforation– Repeat pure tone audiometry
• Hearing improved Ossicular chain intact & mobile
• Hearing same / worse Ossicular chain broken or fixed
Treatment of CSOM Tubo-tympanic Disease
Non-surgical Treatment
• Precautions• Aural toilet• Antibiotics : Systemic & Topical• Antihistamines : Systemic & Topical• Nasal decongestants : Systemic &
Topical• Treatment of respiratory infection &
allergy• Tympanic membrane patcher
Precautions• Encourage breast feeding with child’s
head raised. Avoid bottle feeding
• Avoid forceful nose blowing
• Plug E.A.C. with Vaseline smeared
cotton while bathing & avoid
swimming
• Avoid putting oil , water or self-
cleaning of ear
•Done only for active stage•Dry mopping with cotton swab•Suction clearance: best method•Gentle irrigation (wet mopping)
• 1.5% acetic acid solution used T.I.D.• Removes accumulated debris• Acidic pH discourages bacterial
growth
Aural Toilet
Antibiotics•Topical Antibiotics:
• Ciprofloxacin, Gentamicin, Tobramycin
•Antibiotics + Steroid: for polyps, granulations
• Neosporin + Betamethasone / Hydrocortisone
•Oral Antibiotics: for severe infections
• Cefuroxime, Cefaclor, Cefpodoxime, Cefixime
Antihistamines and Decongestants
• Antihistamines – Chlorphenirami
ne– Cetirizine– Fexofenadine– Loratadine– Levocetrizine– Azelastine
(topical)
• Systemic Decongestants–
Pseudoephedrine
– Phenylephrine• Topical
Decongestants– Oxymetazoline– Xylometazoline– Hypertonic
saline
Kartush T.M. Patcher• Indicated in:
– Perforation in only hearing ear
– Patient refuses surgery
– Patient unfit for surgery
– Age < 7 years
Surgical Treatment• Indicated in inactive or
quiescent stage–Myringoplasty –Tympanoplasty
• Indicated in active stage–Cortical Mastoidectomy–Aural polypectomy
Methods to close perforation• T.M. perforation < 2 mm
– Chemical cautery with silver nitrate
–Fat grafting
(Myringoplasty if these measures fail)
• T.M. perforation > 2 mm– Tympanic membrane patcher– Myringoplasty
Chemical cautery
Surgical Approaches to the middle ear
Wilde’s post-aural incision
Lempert’s end-aural incision
Rosen’s permeatal incision
Hearing Restoration• Myringoplasty
– Surgical closure of tympanic membrane perforation
• Ossiculoplasty– Surgical reconstruction of ossicular
chain• Tympanoplasty
– Surgical removal of disease + reconstruction of hearing mechanism without mastoid surgery
Principles of hearing restoration
• Intact tympanic membrane• Intact ossicular chain• Functioning receiving & relieving
windows• Acoustic separation of these windows• Functioning Eustachian tube• Absence of sensorineural hearing loss• Absence of active infection / allergy in
middle ear cleft
Myringoplasty
Surgical closure of perforation of pars tensa of Tympanic membrane without ossicular reconstruction
Aims• Permanently stop ear discharge : make
the ear dry and safe
• Improve hearing if ossicles are intact and mobile and there is absence of sensori-neural deafness
• Prevention of ongoing complications like further hearing loss, tympanosclerosis, adhesions, mucosal bands, vertigo
• Wearing of hearing aid• Occupational: military, pilots• Recreation: swimming, diving
Contraindications
• Purulent ear discharge
• Otitis externa
• Respiratory allergy
• Age < 7 yr (Eustachian tube not fully
developed)
• Only hearing ear
• Cholesteatoma
MethodsTechniques
• Underlay: graft placed medial to
fibrous annulus
• Overlay: graft placed lateral to fibrous
annulus
Grafts used
• Temporalis fascia, Tragal
perichondrium, Vein graft, Fascia lata,
Dura mater
Overlay Myringoplasty
Underlay Myringoplasty
Steps of underlay Myringoplasty
Tympanomeatal flap raised
Placement of graft
Tympanomeatal flap replaced
Why temporalis fascia?• Basal metabolic rate lowest (best
survival rate)
• Easy to harvest
• Large size graft can be harvested
• Autograft, so no rejection
• Same thickness as normal tympanic
membrane
• Good resistance to infection
Onlay UnderlayGraft cholesteatoma No
Blunting of anterior tympano-meatal angle
No
Lateralization of graft No
Delayed healing time (6 wk)
3-4 weeks
No middle ear inspection Possible
Difficult & takes more time
Easier & quicker
Advantages of Local Anesthesia
• Minimal bleeding
• Hearing results can be tested on
table
• Facial palsy detected immediately
• Labyrinthine stimulation detected
immediately
• No complications of General
anesthesia
Tympanoplasty
Types
Type Pathology Graft placed on
I Ear drum perforation only
Malleus handle
II Malleus handle eroded Incus
III Malleus + Incus eroded Stapes head
IV Only footplate remains: mobile
Footplate exposed
V Only stapes remains: fixed
Lateral SCC opening
VI Only footplate remains: mobile
Round window exposed
(Sono inversion )
Ossiculoplasty• Ossicular graft material
– Autograft • Ossicles : incus/malleus• Cartilage : Tragal/ conchal• Bone : spine of Henle/mastoid
– Homograft: ossicles/cartilage/bone– Biomaterials:
plastic(polyethylene)/ceramic/ teflon/gold
(Biomaterials available as PORP and TORP)