Audio-Digest Foundation: pediatrics

Main Written Summaries Listing | Pediatrics: 2007 Listings
Audio-Digest FoundationPediatrics


Volume 53, Issue 19
October 7, 2007

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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HEAD AND NECK CONCERNS

From Pediatrics for the Primary Care Physician, presented by Nemours

Kenneth M. Grundfast, MD, Professor and Chair, Department of Otolaryngology–Head and Neck Surgery, Boston University School of Medicine, Boston, MA

MODERN MANAGEMENT OF OTITIS MEDIA (OM)
Defining disorder: acute otitis media (AOM)—characterized by pain, fever, and objective findings (eg, red bulging eardrum); persistent otitis media with effusion (POME)—possible erythematous eardrum (not necessarily pain or fever); goal of therapy to diminish duration of effusion; frequent recurrent episodes of AOM—goal to diminish number and frequency of episodes; parameters—ears involved (1 or 2; left or right); if child has AOM and persistent effusion in, eg, right ear (and never left ear), problem may be cholesteatoma; severity (duration or frequency of episodes)

Evidence-Based OM
Decongestants: no evidence that decongestants significantly benefit patients with AOM or POME
Allergy and OME: some evidence of association, but not worthwhile to pursue extensive allergy work-up in every child with OM; OM common, and allergy difficult to treat in early childhood (most OM occurs in children <3 yr of age)
Corticosteroid therapy: no definitive data to show that steroids reduce duration of effusion; risks involved
Antibiotics for OME: no evidence that any antibiotic hastens resolution of POME
Prophylaxis for AOM: some evidence that small daily dose of medication effective for preventing OM; however, not treatment of choice in new era of conjugate vaccine
Tympanostomy tubes: does insertion of tympanostomy tubes reduce frequency of AOM? conflicting data; may shorten length of time OM present (more study needed)
Tonsillectomy and adenoidectomy: no evidence for role of tonsillectomy in management of OM; adenoidectomy may be beneficial (especially in children 4 yr of age); newer studies show that flora of nasopharynx can cause middle ear infection; removal of adenoids diminishes pathogens and may have beneficial effect
Speech and language development: latest data do not show strong relationship among POME, conductive hearing loss, and speech and language delays or delays in cognition

Agency for Healthcare Research and Quality (AHRQ) Guidelines, 2004
AOM (recommendations)
1) To diagnose AOM, confirm history of acute onset, and identify signs and symptoms of middle ear inflammation
2) Management should include assessment of pain
3) (a) Observation without use of antimicrobial agents in child with uncomplicated AOM option for selected children, based on diagnostic certainty, age, severity of illness, and assurance of follow-up; (b) if decision to treat, clinician should prescribe amoxicillin for most children; caveat — treatment questioned by some experts in pediatric infectious disease
4) If patient fails to respond to initial management within 48 to 72 hr, reassess and possibly prescribe antibiotic, or if antibiotic prescribed and patient unresponsive, consider switching to different antibiotic; response defined as reduction of fever (if present) and pain; persistent pain merits change in antibiotic
5) Clinician should encourage prevention of AOM through reduction of risk factors (eg, attending day care with 6 children in group, passive smoke exposure)
6) Evidence insufficient to recommend use of complementary and alternative medicine for AOM
OME (clinical practice guidelines)
Target population: children 2 mo to 12 yr of age; children with or without developmental disabilities or underlying conditions that predispose to development of OME
Recommendations
1) Document laterality, duration of effusion, and presence and severity of associated symptoms each time child with OME evaluated
2) Distinguish child at risk for speech, language, and learning problems, and more promptly evaluate speech and language and possible necessity to intervene if child slightly delayed developmentally
3) If child not at risk, manage with watchful waiting for 3 mo from date of onset of OME
4) Test hearing when OME persists 3 mo, or at any time that language delay, learning problems, or significant hearing loss suspected
5) Child with persistent effusion who is not at specific risk for delay can be seen at 3- to 6-mo intervals; look for structural abnormalities of eardrum or middle ear if suspected (child may be at risk for cholesteatoma)
6) When surgery indicated, insertion of tubes preferred initial procedure
Options: 1) tympanometry to confirm diagnosis of OME; 2) physician referring child with OME should document duration of effusion and reasons for referral, and provide additional relevant information

Conjugate Pneumococcal Vaccine
Coverage: Food and Drug Administration approved heptavalent (PCV7) vaccine in 2000; 7 serotypes; 84% of OM pneumococcal organisms covered (95% of drug-resistant isolates were of serotypes covered); Northern California Kaiser Permanente vaccine study—episodes of OM reduced 7% (recurrent episodes reduced 23% over 6 mo); vaccination associated with 20% reduction in need for tympanostomy tubes; summary—vaccine helpful, but not highly effective in preventing OM and not definitive cure
Pneumococcal capsular polysaccharides conjugated to protein D (Prymula et al, 2006): vaccine efficacy for episodes of AOM (52.6% for first episode, 57.6% for any episode); efficacy against episodes of AOM caused by nontypeable Haemophilus influenzae, 35%; vaccine reduced frequency of infec-tion from vaccine-related cross-reactive pneumococcal serotypes by 65%; using H influenzae–derived protein D as carrier protein for pneumococcal polysaccharides protects against pneumococcal OM, and AOM due to nontypeable H influenzae (predominant organism in most episodes of AOM)
EVALUATION OF THE CHILD WITH SUSPECTED HEARING LOSS
Changing times
Timing of detection: in current era, hearing screening for newborns widespread practice (48 of 50 states have mandatory universal newborn hearing screening); hearing impairment may be detected within first few weeks after birth (in past, detection at 3 yr of age); increasing ability to confirm underlying gene mutation; evaluation conducted earlier, and cochlear implant surgery possible at 1 yr of age (in past, hearing aid, possible cochlear implant at 3 yr of age)
Common causes: in past, meningitis leading cause of severe sensorineural hearing loss in children (diminished with advent of H influenzae type B vaccine); trauma due to auto or bicycle accidents diminished with use of helmets; noise-induced hearing loss diminished because of public information campaigns; infectious causes reduced with adminis- tration of measles, mumps and rubella (MMR) vaccine; today, congenital and hereditary types of hearing loss more prevalent; complete shift in past 10 to 15 yr
Congenital vs hereditary hearing impairment
Definitions: congenital means present at birth; hereditary means caused by genetic factors
Congenital but not hereditary: rubella (largely eradicated by vaccine); factors related to low birth weight (cytomegalovirus infection, fetal alcohol syndrome [FAS]); for every child with syndrome as cause of hearing impairment, 2 others have hereditary hearing impairment with no associated findings (genetic mutation with no phenotypic signs beyond hearing impairment)
Hereditary but not congenital: more hereditary hearing impairment autosomal recessive than autosomal dominant (80% autosomal recessive; 18% autosomal dominant; 2% X-linked recessive; mitochondrial [virtually immeasurable]); otosclerosis—hearing loss in one or both ears at 30 to 40 yr of age; hearing progressively worsens; conductive hearing loss; cure stapes surgery (stapedectomy); 50% penetrance, but not present at birth; pattern of progression (loss begins in 20s and 30s; by 40-50 yr of age, significant hearing loss); delayed-onset nonsyndromic autosomal dominant progressive sensorineural hearing loss—individual born with normal hearing; hearing impairment beginning at 10 to 20 yr of age; in midlife, progressive hearing loss; runs in families; no phenotypic abnormalities except hearing loss; Usher’s syndrome type 2—theoretically, individual born with normal hearing (loss progresses with age)
Clues to gene mutation: type—if conductive hearing loss, possible persistent middle ear effusion; if sensorineural, suspect genetic mutation; if hearing loss mixed, different genes involved; timing of onset—at birth or after birth? (different genes involved); family history—look for inheritance pattern (caveat, many children with hearing impairment have no affected family members); physical findings—syndrome present or absent? some syndromic findings not evident on physical examination; other findings—proteinuria, hematuria, or abnormal electrocardiography (ECG); stability— hearing loss stable or progressive?
Behavioral audiography: u-shaped or “cookie-bite” audiogram showing worse hearing in mid-frequencies highly suggestive of hereditary hearing impairment; clue in older child (cooperation with test usually requires age 3 yr); if not severe, problem might not be detected early on
Syndromic vs nonsyndromic: in United States, most hereditary hearing impairment nonsyndromic (connexin-26 mutation most common genetic nonsyndromic cause); identification of syndrome may lead to detection of renal or cardiac abnormality (not common); Usher’s, Pendred’s, and Jervell and Lange-Nielsen syndromes mentioned frequently in literature, but not most common; clues to syndrome not manifest at or soon after birth—subtle abnormalities difficult to detect at 3 or 4 wk of age; distinguishing physical features more apparent at 6 to 12 mo of age; abnormal computed tomography (CT) or magnetic resonance imaging can help diagnose some syndromes; developmental delay key component of some syndromes; diagnosis of syndrome helps identify affected organ systems (eg, kidney, heart) and helps explain to parents reason for hearing impairment
Usher’s syndrome: autosomal recessive disorder characterized by retinitis pigmentosa; type 1—congenital; vestibular function absent (look for semiataxic gait); type 2—“progressive”; recent study (Reisser et al, 2002) suggests that visual impairment progressive but hearing loss stable
Pendred’s syndrome: autosomal recessive disorder; nontoxic goiter; sensorineural hearing loss (usually congenital); patients usually euthyroid; newborn hearing screening helpful; previously, perchlorate discharge test used (new genetic test easier); associated with Mondini’s deformity (detectable on CT); if gene mutation present, confirm diagnosis with radiography
Jervell and Lange-Nielsen syndrome: syncopal episodes with arrhythmia and risk for sudden death; prolonged Q-T interval; abnormality evident on ECG (needed for diagnosis); severe sensorineural hearing loss
Goldenhar’s syndrome: oculoauriculovertebral dysplasia; facial asymmetry; unilateral mandibular hypoplasia; relatively common (prevalence 1 in 5600 live births); case—child failed screening hearing test in left ear; on examination, could not get speculum in to see ear canal and eardrum (subtle diagnosis); conductive hearing loss due to ossicular abnormality; more flagrant form—newborn with micropsia and epibulbar dermoid in left eye; nondevelopment of left ear (no ear canal or middle ear bones)
Treacher Collins syndrome: another facial bone abnormality associated with profound hearing impairment; mixed or conductive hearing loss; “Jiminy Cricket” facies; anti-Mongoloid eye slant; cup-shaped ears; constricted midface; autosomal dominant disorder; widely variable expression; stenosis or atresia of ear canal; congenital stapes fixation; poorly pneumatized mastoid
Waardenburg’s syndrome: pigmentary disorder involving eye; variable expression (from near-normal hearing to profoundly deaf); 4 types (types 1 and 2 most common); type 1 (case)—white forelock; widely spaced eyes; classic blue eyes; synophrys (confluent eyebrows); type 2—no dystopia canthorum; in hypotelorism, cranial bone abnormality (orbits laterally displaced); in dystopia canthorum, look closely at medial canthi; case—mother <30 yr of age has poliosis (early graying); medial canthi widely spaced; confluent eyebrows
X-linked recessive hearing loss: occurs in male patients (female individuals carriers); mixed hearing loss (conductive and sensorineural); clinical diagnosis (case)—boy between 4 and 5 yr of age; history of frequent episodes of OM; poor academic performance in comparison to peers; teacher considers child inattentive; mother says child cannot hear properly; few ear infections, but usually presents with small amount of fluid in one ear; after placement of tubes, conductive and mild sensorineural hearing loss still present; radiographic diagnosis—distinct abnormality on CT
Branchio–oto–renal (BOR) syndrome: relatively common; autosomal dominant; preauricular pits and branchial cleft cysts; wide variation in hearing levels; caveat (preauricular pits not necessarily associated with hearing impairment)
Fetal alcohol syndrome: congenital, not hereditary; facial appearance—elongated distance between columella of nose and upper lip; long forehead; poorly defined philtrum; case—boy had facial signs and history consistent with FAS
Cytomegalovirus (CMV) infection: not common but still presents; many women of childbearing age carry CMV; chorioretinitis, poor neuromuscular control, and cognitive disabilities; polymerase chain reaction test used to make diagnosis; difficult to diagnose at birth; case—CMV diagnosed in girl after birth; left-ear hearing impairment detected at 4 yr of age; by age 6 yr, progression from unilateral to bilateral hearing loss
Enlarged vestibular aqueduct: most common radiographic abnormality detected in children with hearing impairment; more common than Mondini’s deformity; once abnormality detected on CT, child at risk for incremental decrease in hearing; step-wise decrements associated with head trauma (these children should not play contact sports)
Diagnostic paradigm for childhood idiopathic sensorineural hearing loss (studies by Preciado et al, 2004 and 2005): not helpful—erythrocyte sedimentation rate, tests for syphilis; cholesterol; triglycerides; hemoglobin; platelets; urinalysis; thyroid function tests; occasionally helpful—ECG (to detect, eg, Jervell and Lange-Nielsen syndrome); helpful—radio-graphic imaging (27% had abnormalities); genetic testing (18% had mutations in GJB2 gene [connexin gene]; ophthalmology evaluation
Speaker’s advice: know results of newborn hearing screening tests; look for dysmorphic features (consult otolaryngologist, ophthalmologist, or clinical geneticist if not sure whether phenotypic abnormalities present); obtain urinalysis (look for proteinuria and hematuria) and ECG; test for connexin mutations; CT usually not performed at <12 to 18 mo of age
Conclusions: know difference between congenital and hereditary hearing loss; look for subtle abnormalities in syndromes (not all findings evident at birth); timely consultations may be indicated to make correct diagnoses through first, second, and third years of life in children who have failed newborn hearing screening tests

Suggested Reading

Coyte PC et al: The role of adjuvant adenoidectomy and tonsillectomy in the outcome of the insertion of tympanostomy tubes. N Engl J Med 344:1188, 2001; Harrison CJ: Changes in treatment strategies for acute otitis media after full implementation of the pneumococcal seven valent conjugate vaccine. Pediatr Infect Dis J 22:S120, 2003; Paradise JL et al: Effect of early or delayed insertion of tympanostomy tubes for persistent otitis media on developmental outcomes at the age of three years. N Engl J Med 344:1179, 2001; Paradise JL et al: Language, speech sound production, and cognition in three- year-old children in relation to otitis media in their first three years of life. Pediatrics 105:1119, 2000; Paradise JL et al: Tympanostomy tubes and developmental outcomes at 9 to 11 years of age. N Engl J Med 356:248, 2007; Poehling KA: Reduction of frequent otitis media and pressure-equalizing tube insertions in children after introduction of pneumococcal conjugate vaccine. Pediatrics 119:707, 2007; Preciado DA et al: A diagnostic paradigm for childhood idiopathic sensorineural hearing loss. Otolarngol Head Neck Surg 131:804, 2004; Preciado DA et al: Improved diagnostic effectiveness with a sequential diagnostic paradigm in idiopathic pediatric sensorineural hearing loss. Otol Neurotol 26:610, 2005; Prymula R et al: Pneumococcal capsular polysaccharides conjugated to protein D for prevention of acute otitis media caused by both Streptococcus pneumoniae and non-typable Haemophilus Influenzae: a randomized double-blind efficacy study. Lancet 367:740, 2006; Reisser CF et al: Hearing loss in Usher syndrome type II is nonprogressive. Ann Otol Rhinol Laryngol 111:1108, 2002; Rosenfeld RM, Bluestone CD: Evidence-Based Otitis Media (2nd ed), BC Decker, Inc: St Louis, MO, 2003; Rosenfeld RM et al: Clinical practice guideline: otitis media with effusion. Otolaryngol Head Neck Surg 130:S95, 2004; Rovers MM et al: The effect of ventilation tubes on language development in infants with otitis media with effusion: a randomized trial. Pediatrics 106:E42, 2000.

Educational Objectives

The goal of this program is to improve management of otitis media (OM) and hearing impairment. After hearing and assimilating this program, the clinician will be better able to:
1. Explain the differential diagnosis of OM.
2. Describe current recommendations from the Agency for Healthcare Research and Quality (AHRQ) for managing acute OM.
3. Describe current recommendations from the AHRQ for managing OM with effusion.
4. Evaluate children for suspected hearing loss.
5. Recognize syndromes associated with hearing impairment.

Faculty Disclosure

In adherence to ACCME Standards for Commercial Support, Audio-Digest requires all faculty members to disclose relevant financial relationships within the past 12 months that might create any personal conflicts of interest. Any identified conflicts were resolved to ensure that this educational activity promotes quality in health care and not a proprietary business or commercial interest. For this program, the following has been disclosed: Dr. Grundfast has been a paid consultant to Innovia Medical.

Acknowledgments

Dr. Grundfast was recorded at Pediatrics for the Primary Care Physician, presented June 29 to July 1, 2007, in Amelia Island, FL, by Nemours. The Audio-Digest Foundation thanks Dr. Grundfast and Nemours for their cooperation in the production of this program.

Reproduction of this summary in whole or in part in any form or medium without express written permission is prohibited.