{
 "topic": "Otitis Media With Effusion",
 "slug": "otitis-media-with-effusion",
 "category_id": 15281,
 "summary": "Distinguishing OME from acute otitis media, its diagnostic tools, watchful-waiting management, and which children need earlier referral.",
 "written_by": "claude-sonnet",
 "references": [
  {
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   "author": "American Academy of Pediatrics",
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 ],
 "short": [
  {
   "title": "In short",
   "content": "- Otitis media with effusion (OME) = middle-ear effusion (MEE) without signs or symptoms of acute infection \u2014 the key distinction from acute otitis media (AOM), which requires MEE plus signs/symptoms of inflammation (otalgia, fever, irritability, red or bulging TM).\n- OME differs from chronic suppurative otitis media (CSOM) because there is no tympanic membrane perforation.\n- \"Chronic\"/persistent OME is generally defined as effusion lasting more than 12 weeks (some sources: >3 months); recurrent acute otitis media (RAOM) is 3 or more AOM episodes in 6 months (or \u22654 in a year).\n- OME commonly follows resolution of AOM (as the middle-ear epithelium recovers) or arises spontaneously from eustachian tube dysfunction; it often resolves spontaneously within 3 months if there is no reinfection.\n- Symptoms are typically hearing loss (usually mild, often detected only by audiogram) or aural fullness \u2014 not pain or fever; OME should NOT be treated with antibiotics.\n- Diagnosis uses pneumatic otoscopy (decreased/immobile TM mobility) and tympanometry (type B = effusion likely, type C = effusion possible, type A = no effusion) or acoustic reflectometry.\n- Molecular (PCR) testing detects bacterial DNA in up to 80% of OME middle-ear fluid samples; Moraxella catarrhalis is proportionally more common in OME than in AOM, possibly reflecting biofilm involvement.\n- Children with \u22654 AOM episodes/year or \u22658 months of MEE in a year are termed \"otitis prone\" and are at increased risk of conductive hearing loss, speech delay, and altered language development.\n- Randomized trials of early vs. delayed/no tympanostomy tube insertion in otherwise healthy children with prolonged effusion showed no short- or long-term advantage of early tubes for speech, language, or cognitive outcomes.\n- Children with permanent hearing loss independent of OME, speech/language delay, autism spectrum disorder, Down syndrome or craniofacial disorders, blindness, cleft palate, or developmental delay are considered at higher risk and warrant closer management of OME."
  }
 ],
 "long": [
  {
   "title": "Definition",
   "content": "Otitis media with effusion (OME) is fluid in the middle ear space in the absence of signs or symptoms of acute infection. It can be described as chronic accumulation of mucus within the middle ear and sometimes the mastoid air cell system, with the effusion classified as mucoid or serous (synonyms include serous, secretory, exudative, or nonsuppurative otitis media, and colloquially \"glue ear\"). The distinguishing feature versus acute otitis media (AOM) is the absence of acute inflammatory signs \u2014 both require middle-ear effusion (MEE) for diagnosis, but AOM adds otalgia, fever, or irritability, and a red or bulging tympanic membrane. OME also differs from chronic suppurative otitis media in that there is no tympanic membrane perforation. Persistent (chronic) OME is generally defined by effusion lasting more than about 12 weeks (some sources use 3 months); recurrent acute otitis media (RAOM) is defined as 3 or more AOM episodes within 6 months, and children with 4 or more AOM episodes in a year, or at least 8 months of middle-ear effusion in a year, are termed \"otitis prone.\""
  },
  {
   "title": "Etiology",
   "content": "OME can occur spontaneously from eustachian tube dysfunction, or it can follow (and represent the resolving aftermath of) an episode of AOM \u2014 once the acute infection resolves, it takes time for the middle-ear epithelium to recover, during which effusion persists temporarily. Molecular testing (PCR) of middle-ear fluid in OME detects bacterial DNA in up to 80% of samples; notably, Moraxella catarrhalis DNA is found \u2014 alone or as a copathogen \u2014 in a larger proportion of OME cases than AOM cases, and biofilms have been proposed (without definitive proof) to explain the persistence of bacterial DNA despite the absence of acute infection signs."
  },
  {
   "title": "Clinical features",
   "content": "OME typically presents with hearing loss or aural fullness rather than pain or fever. In children, the associated hearing loss is generally mild and variable, and is often detected only by audiogram rather than by parental report. OME is frequently preceded by an episode of AOM with otalgia and fever, with the effusion persisting after the acute infection has cleared, or it may follow an upper respiratory infection. Mild discomfort or a sensation of ear \"fullness\" is not unusual. If effusion is persistent and left untreated, resulting conductive hearing loss can affect behavior and delay communicative development, particularly in children who are otitis-prone."
  },
  {
   "title": "Diagnostics",
   "content": "Diagnosis relies on pneumatic otoscopy and tympanometry rather than antibiotics or imaging. On pneumatic otoscopy, decreased or immobile tympanic membrane mobility supports effusion; on tympanometry, a type A tracing indicates no effusion, type C indicates possible effusion (sluggish TM movement), and type B indicates likely effusion (immobile TM). Acoustic reflectometry can also help confirm the presence or absence of effusion. These tools identify fluid but do not distinguish infected from non-infected effusion. A stepwise approach differentiates OME from other middle-ear conditions: acute onset (<2 days) with effusion and inflammatory signs/symptoms indicates AOM; effusion without those acute criteria indicates OME; effusion with an active discharge and TM perforation raises AOM with perforation or, if chronic (over 2 weeks) with discharge, chronic suppurative otitis media."
  },
  {
   "title": "Treatment",
   "content": "OME should not be treated with antibiotics, since it is not an acute bacterial infection. Standard management for uncomplicated cases in an otherwise healthy child is observation, since most OME resolves spontaneously within about 3 months if there is no reinfection. If effusion persists beyond 3 months, arrange a hearing test; a hearing test and ENT consultation are also indicated for effusion persisting 3\u20136 months or when bilateral. If surgical intervention becomes necessary, tympanostomy tube insertion is the preferred initial procedure; adenoidectomy is not routinely added unless there is a distinct additional indication (e.g., nasal obstruction, chronic adenoiditis). Medical management of the underlying mucosal disease process is still required regardless of whether surgery is performed, and the treating clinician should monitor the patient until resolution occurs. Notably, randomized trials comparing early tympanostomy tube insertion against delayed or no tube insertion in prolonged effusion found no short- or long-term advantage of early tubes for speech, language, or cognitive outcomes in otherwise healthy children."
  }
 ],
 "clinical": [
  {
   "title": "Management at the bedside",
   "content": "Confirm the diagnosis with pneumatic otoscopy and tympanometry rather than treating empirically \u2014 look for decreased/immobile TM mobility (tympanometry type B) without the acute inflammatory signs (otalgia, fever, red/bulging TM) that would instead point to AOM. Once OME is confirmed, do not prescribe antibiotics. In an otherwise healthy child with no risk factors, the appropriate initial step is watchful observation, since most OME clears spontaneously within about 3 months.\n\nIf effusion persists beyond 3 months, obtain a hearing test; if it persists 3\u20136 months, or is bilateral, arrange a hearing test and refer for ENT consultation, since untreated persistent effusion risks conductive hearing loss that can affect behavior and delay speech/language development. Refer promptly (rather than waiting through the usual observation period) for children who are otitis-prone or who carry additional risk for developmental impact \u2014 permanent hearing loss independent of OME, suspected or diagnosed speech/language delay, autism spectrum disorder or other pervasive developmental disorders, Down syndrome or craniofacial disorders, blindness or uncorrectable visual impairment, cleft palate, or developmental delay \u2014 since these children have less capacity to compensate for even mild, fluctuating hearing loss. When surgery is indicated, tympanostomy tube insertion is the preferred procedure; reserve adenoidectomy for children with a separate indication such as nasal obstruction or chronic adenoiditis, and continue medical management of the mucosal disease alongside any surgical intervention until the condition resolves."
  }
 ]
}