Audio-Digest Foundation: otolaryngology

Main Written Summaries Listing | Otolaryngology: 2006 Listings
Audio-Digest FoundationOtolaryngology


Volume 39, Issue 02
January 21, 2006

The following is an abstracted summary, not a verbatim transcript, of the lectures/discussions on this audio program. If, after reviewing this written summary, you would like to hear the contents and/or earn CME/CE credit, simply visit the Audio-Digest Foundation website

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MANAGEMENT OPTIONS IN OTOLOGY

MANAGEMENT OF THE DRAINING EAR —Soham Roy, MD, Assistant Professor of Pediatric Otolaryngology, Miller School of Medicine at the University of Miami
Drainage caused by: acute otitis media (AOM)—signs and symptoms of middle ear infection include fever, ear pain, irritability, erythema of tympanic membrane (TM), purulent effusion, and TM bulging under pressure; systemic antibiotics preferred when TM intact; recurrent AOM defined as 3 infections in 6 mo or 4 infections in 12 mo (tympanostomy tube usually placed); systemic antibiotics preferred when TM intact; AOM with spontaneous TM rupture—symptoms improve with onset of otorrhea (perforation of TM usually small); oral or topical antibiotics achieve 96% resolution rate; otitis media with effusion (OME)—middle ear space contains fluid; lacks signs and symptoms of AOM; chronic OME defined as bilateral effusion lasting 3 mo or unilateral effusion lasting 6 mo; serous effusion and air bubbles visible in middle ear cleft; otorrhea—fluid from inflamed middle ear cleft drains through damaged TM; caused by AOM or OME; generally viewed as AOM that drains through patent tympanostomy tube or ruptured TM; chronic suppurative otitis media (CSOM)—persistent purulent drainage caused by middle ear infection draining through damaged TM; may involve cholesteatoma
Tympanostomy tube otorrhea: most common complication of intubation, ie, 50% of children with patent tubes experience 1 episode; caused by AOM related to upper respiratory infection, nasopharyngeal reflux, adenoiditis, or contamination of external ear canal; suction and culture drainage; originates from—nasopharyngeal reflux entering middle ear; water exiting ear canal and producing middle ear inflammation; signs and symptoms — controlled rupture from intubation drains fluid from middle ear and reduces pain level and canal edema; fluid occlusion can impair hearing; goal— suction drainage to allow entry of topical medication; pathogens—same as in AOM (Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis) but different from that of CSOM (Pseudomonas aeruginosa)
Topical antibiotics: first-line therapy; ofloxacin (Floxin Otic) and ciprofloxacin plus dexamethasone (Ciprodex Otic) approved by Food and Drug Administration (FDA) for use in open middle ear; aminoglycosides—not approved by FDA; associated with risk for ototoxicity; include gentamicin, dexamethasone plus tobramycin (TobraDex), and hydrocortisone plus neomycin sulfate and polymyxin B (Cortisporin); when administering ear drops at home—wash hands; warm bottle in hands; place child on side; perform aural toilette; pull ear canal straight; insert drops; pump tragus to ensure drops enter middle ear; aural toilette in office—helpful when home therapy fails; daily ear cleaning and application of drops achieves high resolution rate among nonresponders
Observations: if no improvement occurs by 7 days, culture and retreat; surgery rarely indicated unless disease recurs or tube-induced otorrhea present; at 1 wk—antibiotic drops achieve 90% to 96% cure rate; if treatment fails, repeat culture (60% of patients have P aeruginosa and require fluoroquinolones); if problem—does not resolve in 2 to 3 wk, consider intravenous (IV) antibiotics or extubation; continues >4 wk, consider tube removal and replacement, adenoidectomy, looking for cholesteatoma, or immunodeficiency; granulation around tympanostomy tube—frequently presents as bloody or recurrent otorrhea; often covers tube; responds to topical Ciprodex; systemic antibiotics rarely needed; if medical therapy fails, tube and granuloma may be removed
OTITIS MEDIA: UPDATE OF ETIOLOGIES AND CLINICAL PRACTICE GUIDELINES —Ramzi Younis, MD, Associate Professor and Chief of Pediatric Otolaryngology, Miller School of Medicine at the University of Miami
Otitis media with effusion: can resolve spontaneously; multifactorial in origin; main cause of pediatric hearing loss; signs and symptoms—absent in 50% of patients; include aural fullness, ear rubbing, failure to respond to voice, and recurrent otitis media (OM); eustachian tube dysfunction with poor drainage of middle ear space—main cause of OME; may involve obstruction, poor opening, large adenoids, poor compliance, and/or inflammation; risk factors— bottle feeding; smoking; allergy; recurrent infection; enlarged adenoids; culture—aids treatment selection; H influenzae or S pneumoniae found in 30% of cultures
Diagnostic guidelines: pneumatic otoscopy—primary diagnostic tool; sensitive and specific means of evaluating TM and middle ear effusion; hearing tests—indicated when OME lasts >3 mo or when problems with language development or learning accompany hearing loss; screening of healthy schoolchildren of no value; speech and language development—language testing essential in all children with hearing loss; risk factors for delayed speech and language development include persistent OME with hearing loss, low maternal education level, unfavorable child-care environment, and low socioeconomic level; comprehensive audiometric evaluation—recommended; visual or conditioned response- oriented audiometry indicated for infants 6 to 24 mo of age; play audiometry indicated for children 24 to 48 mo of age; auditory brainstem response (ABR) testing and measurement of otoacoustic emissions (OAE)—not recommended; assess auditory pathways, not hearing
Treatment guidelines: ineffective options—antibiotics; systemic steroids; antihistamines; decongestants
Watchful waiting: recommended for patients not at risk for speech, language, or learning impairment; not recommended for patients at risk for complications; risk factors mandating evaluation and prompt treatment—recurrent or persistent OM during summer; hearing loss; history of intubation; suspected diagnosis of speech problem; autism syndromes, blindness, or cleft palate; points—be careful when selecting treatment; repeat assessment of hearing, speech, and language capabilities may be necessary; children with hearing loss of—30 decibels (dB) require treatment; 20 dB to 39 dB require individualized management approach; <20 dB can be monitored
Tympanostomy tubes: necessary when patient has complications of OM; indicated in—symptomatic OM lasting >4 mo; persistent OM and high risk; OM with structural changes of TM
Additional options: adenoidectomy—useful in children >4 yr of age; associated with high risk for complications and no additional benefit in asymptomatic children <4 yr of age; second surgery reduces risk for additional surgery by 50%; no role for—tonsillectomy; myringotomy; complementary or alternative medicine; allergy therapy
VESTIBULAR DISORDERS —Fred F. Telischi, MD, Director, University of Miami Ear Institute, Miami
Benign paroxysmal positional vertigo (BPPV): involves free floating particles in endolymph of semicircular canals; characterized by vertiginous episode—lasting 1 min; occurring with head movement in association with rolling to one side while in bed; not associated with nausea or vomiting; can resolve spontaneously and recur; Dix-Hallpike maneuver—key; positive for nystagmus with affected ear down; particle repositioning maneuver—performed once nystagmus detected; eliminates vertigo by repositioning particles in endolymph; requires patient to avoid vigorous activity and not lie flat for 48 hr to allow particles to settle; surgery to occlude posterior canal—can treat intractable cases
Vestibular neuritis: probably viral; involves vestibular portion of eighth cranial nerve; acute and severe for 24 hr; tends to recur over months to years; associated with—nausea and vomiting; minimal to no hearing loss; imaging—usually normal; brightness occasionally detected on eighth cranial nerve; treatment—symptomatic during acute phase; options include steroids and/or antivirals and vestibular suppressants; decreased vestibular response can be treated initially with vestibular rehabilitation; intratympanic gentamicin—creates stable relative vestibular reduction (RVR) lesion in those individuals who fail rehabilitation, have RVR, and are suspected of having unstable lesion
Labyrinthitis: more severe than vestibular neuritis; episodes last from 1 to several days; patients with severe episode— hospitalized; require continuous administration of vestibular suppressants as well as steroids and antiviral agents; antibiotics indicated if otologic infection or meningitis suspected; patients often experience—complete loss of vestibular function; severe hearing loss; points—patients require time to compensate after acute phase (vestibular rehabilitation and exercise facilitate recovery); if patient fails to respond to rehabilitation, use surgery or intratympanic chemical labyrinthectomy to create stable lesion, then follow with additional rehabilitation
Superior semicircular canal dehiscence: can occur in combination with—pressure or sound-induced vertigo, ie, Tullio’s phenomenon; pressure-induced nystagmus, ie, Hennebert’s sign; conductive hearing loss—similar to hearing loss of otosclerosis, but acoustic reflexes intact (no stiffening of ossicular chain); caused by “third window” phenomenon, ie, one-third dehiscence of inner ear labyrinth; closing off dehiscence—can manage severely debilitated patients; may improve conductive hearing loss in some cases; diagnosis—requires high index of suspicion and good radiologist; diagnostic hallmark absence of arcuate eminence over superior semicircular canal on oblique coronal computed tomography (CT)
Perilymph fistula: characteristics—episodic vertigo related to Valsalva-type maneuvers; fluctuating or progressive sensorineural hearing loss (SNHL); history of trauma, eg, barotrauma, head trauma, often to ear canal and TM; diagnosis—no reliable preoperative diagnostic tests; positive pneumatic otoscopy or fistula test helpful; middle ear exploration—provides best diagnostic information; can be carried out in office, eg, when unsure of situation, form small myringotomy and evaluate oval window niche and round window niche and membrane (look for tear or fluid collection)
Meniere’s disease: symptoms—vertigo; fluctuating SNHL; tinnitus; pressure; physical examination—generally normal; head-shaking test detects nystagmus; abnormalities on static and dynamic vestibular testing; electrocochleography may be positive with elevated summating-to-action potential ratio; rule out retrocochlear pathology; electronystagmography (ENG) variable; treatment—low sodium diet; avoidance of sugar and alcohol; allergy management; diuretics; vasodilators; steroids (oral and intratympanic); endolymphatic sac surgery; ablative treatment (intratympanic gentamicin; surgical labyrinthectomy gold standard)
MEDICALLY TREATABLE ACUTE HEARING LOSS Thomas Balkany, MD, Hotchkiss Professor and Chairman, Department of Otolaryngology; Professor, Departments of Neurological Surgery and Pediatrics, Miller School of Medicine at the University of Miami
Noise-induced hearing loss (NIHL): L-N-acetylcysteine (L-NAC)—aural precursor of methionine; available without prescription; effective; better prophylactic than therapeutic agent, but used therapeutically in early stages of NIHL; transtympanic methionine—strong antioxidant in cochlea; under investigation for treating late-stage NIHL
Platinum ototoxicity, eg, cisplatin: therapeutic doses of aspirin (acetylsalicylic acid) block platinum-induced ototoxicity; if aspirin ineffective and substantial decline in hearing occurs—fractionate platinum dose and increase hydration; 0.5 mL of transtympanic dexamethasone (Decadron) administered binaurally to middle ear produced rescue and prophylactic benefit; point—salicylates and Decadron do not block antineoplastic effects of cisplatin
Aminoglycoside-induced deafness: better control has reduced incidence; iron-chelating drugs prevent ototoxic and nephrotoxic effects without blocking antibiotic efficacy
Sudden sensorineural hearing loss (SSNHL): bed rest helpful; oral prednisone—definitive; methylprednisolone (Medrol Dosepak) inadequate; administer 1 mg/kg per day for 2 wk, then taper dose; if patient cannot tolerate dose, taper after 1 wk; acyclovir or ganciclovir—indicated when patient presents 24 hr after onset; used in combination with oral steroids; transtympanic Decadron—candidates include brittle diabetics, patients with history of steroid complications or failed oral therapy, prepubescent children, and patients willing to try every option to restore hearing; administers more steroid to cochlea than oral prednisone; can be combined with oral steroid
Autoimmune inner ear disease: nonfluctuating, bilateral, progressive SNHL key clinical characteristic; oral prednisone—effective; cyclosporin used to “hold” steroid effect (methotrexate ineffective); transtympanic Decadron administered when—patients cannot take oral steroids; prednisone effect lost and additional prednisone does not restore steroid effect and reverse hearing loss
Imaging: mandatory, eg, acute unilateral SNHL can be caused by acoustic neuroma in 10% of patients; CT imaging detects mild dysplasia that may present later in life
PROPHYLACTIC ANTIBIOTICS IN REDUCING POSTOPERATIVE INFECTION RATES IN MASTOID AND MIDDLE EAR SURGERY —Natasha Pollak, MD, University of Missouri Health Care, Columbia
Postoperative infections: data suggest antibiotic prophylaxis does not reduce postoperative infection rates; independent risk factors for surgical wound infection identified by Centers for Disease Control and Prevention (CDC)— high preoperative wound contamination level; long duration of surgery; high American Society of Anesthesiologists (ASA) score; points—combining CDC risk factors into single index enhances predictive ability; Joint Commission on Accreditation of Healthcare Organizations (JCAHO) requirements for reporting postoperative infection rates of individual surgeons will potentially increase use of perioperative antibiotics
Retrospective chart review of patients who underwent tympanoplasty with or without mastoidectomy: even though prophylactic antibiotics not administered, overall postoperative infection rate remained low (1.8%); combining CDC risk factors into single index showed—high level of preoperative wound contamination (ie, draining ears) and high ASA ratings predictive of increased risk for postoperative wound infection; increased duration of surgery not associated with increased risk; conclusion—neither medicolegal concerns nor JCAHO requirements to publish surgeon-specific infection rates acceptable reasons for administering expensive and potentially harmful antibiotics on prophylactic basis

Educational Objectives

The goal of this program is to educate the listener about current techniques for managing common otologic diseases. After hearing and assimilating this program, the clinician will be better able to:
1. Diagnose and treat disorders causing middle ear otorrhea
2. Implement current guidelines for managing otitis media with effusion
3. Assess current options for treating vestibular disorders
4. Review nonsurgical options for managing common forms of acute hearing loss
5. Determine the efficacy of prophylactic antibiotic therapy in preventing infection after mastoid and middle ear surgery.

Discussed on This Program

Acyclovir (acycloguanosine) [Zovirax]
Cefazolin sodium [Ancef, Zolicef]
Ciprofloxacin and dexamethasone [Ciprodex Otic]
Cisplatin (CDDP) [Platinol-AQ]
Cyclosporine (cyclosporin A) [Gengraf, Neoral, Sandimmune]
Dexamethasone [Decadron, others]
Dexamethasone and tobramycin [TobraDex]
Ganciclovir sodium (DHPG) [Cytovene]
Gentamicin sulfate (several trade names and preparation)
Heparin sodium injection
Hydrochlorothiazide (several trade names and preparations)
Hydrochlorothiazide and triamterene [Dyazide, Maxzide, Maxzide-25MG]
Hydrocortisone, neomycin sulfate, and polymyxin B [Cortisporin Otic, others]
Hydrocortisone, neomycin sulfate, and polymyxin B (several trade names)
Methionine [M-Caps, Pedameth, Uracid]
Methylprednisolone [Medrol]
Ofloxacin [Floxin Otic, others]
Prednisone (several trade names and preparations)
Aspirin (acetylsalicylic acid; ASA) [several trade names and preparations]

Suggested Reading

Brandt T: Management of vestibular disorders. J Neurol 247:491, 2000; Brantberg K et al: Gentamycin treatment in peripheral vestibular disorders other than Meniere’s disease. ORL J Otorhinolaryngol Relat Spec 58:277, 1996; Brantberg K et al: Symptoms, findings, and treatment in patients with dehiscence of the superior semicircular canal. Acta Otolaryngol 121:68, 2001; Daniel SJ et al: guidelines for the treatment of tympanostomy tube otorrhea. J Otolaryngol 34:S60, 2005; Harris JP et al: Treatment of corticosteroid-responsive autoimmune inner ear disease with methotrexate: a randomized clinical control. JAMA 290:1875, 2003; Kopke R et al: Prevention of impulse noise-induced hearing loss with antioxidants. Acta Otolaryngol 125:235, 2005; Rosenfeld RM et al: Clinical practice guidelines: otitis media with effusion. Otolaryngol Head Heck Surg 130:S95, 2004.

Faculty Disclosure

In adherence to ACCME guidelines, the Audio-Digest Foundation requests all lecturers to disclose any significant financial relationship with the manufacturer or provider of any commercial product or service discussed. The following has been disclosed: Dr. Balkany is affiliated with MED-EL: Medical Electronics and Cochlear Corporation.


Drs. Balkany, Roy, Telischi, and Younis gave their scientific presentations at the 32nd Annual Chandler Clinical Concepts of Otolaryngology presented June 2 to 5, 2005, in Duck Key, Florida by the Miller School of Medicine of the University of Miami; Dr. Pollak gave her presentation at the 138th Annual Meeting of the American Otological Society, Inc. presented May 14 to 15, 2005, in Boca Raton, Florida as part of the annual Combined Otolaryngological Spring Meetings (COSM). The Audio-Digest Foundation thanks the speakers and the sponsors for cooperation in the production of this program.


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