Hearing assessment and childhood hearing loss — branching viva

Station opening

Examiner: "Define childhood hearing loss and classify it by site, and explain why the newborn hearing screen exists at all." [1]

Strong candidate (must-hit)

• Defines childhood hearing loss as reduced sensitivity or disordered neural processing of sound that threatens language development; classifies it into conductive (outer or middle ear), sensorineural (cochlea or auditory nerve) and mixed, distinguished by the air-bone gap on the audiogram; explains that a newborn with permanent hearing loss is clinically silent, so universal screening finds the loss before any parent or clinician could, during the critical period of auditory development. [1] [2]

Weak candidate

• "Children who can't hear present with deafness, and we test the ones whose parents are worried." [1]

Branch A — The baby who refers on the newborn hearing screen

Examiner: "A term baby refers on otoacoustic emissions in both ears. What are the milestones of the screening programme, and what confirms the loss?" [6]

Strong

• States the one-three-six milestones: screen by one month, diagnostic auditory brainstem response by three months, enrolment in early intervention by six months; explains that a diagnostic ABR with the baby asleep gives frequency-specific thresholds and that adding bone conduction distinguishes conductive (air-bone gap) from sensorineural loss; stresses that every refer must be tracked and no child lost to follow-up, because the critical period is open. [6] [5]

Weak

• "We retest at the six-month check and refer to audiology if the parents are still worried." [6]

Branch B — The NICU graduate and auditory neuropathy

Examiner: "A premature, ventilated graduate of the neonatal intensive care unit is due for a hearing screen. Which modality, and why?" [5]

Strong

• States that NICU graduates are screened with automated auditory brainstem response, not otoacoustic emissions, because they carry the highest risk of auditory neuropathy spectrum disorder, in which outer hair cells survive and emissions are present but neural synchrony is disordered and the ABR is absent; an emissions-only screen can read as normal in a baby who cannot hear speech; describes ANSD management as individualised, from hearing aids and FM systems to cochlear implantation. [5] [1]

Weak

• "We use otoacoustic emissions because they are quick and the baby is too unstable for anything else." [5]

Branch C — The preschool child with glue ear

Examiner: "A three-year-old has three months of bilateral glue ear with a 32 dB conductive loss and speech delay. The parents want grommets to protect his development. What do you advise, and what does the evidence say?" [10]

Strong

• Confirms the child meets grommet criteria: persistent bilateral otitis media with effusion for three months or more with hearing 25 to 30 dB HL or worse and speech impact; states that medical treatments have no lasting benefit and watchful waiting is the default for those who do not meet criteria; explains that the Paradise randomised trials found no difference in developmental, language, cognitive or academic outcomes between early and delayed tube insertion, so grommets are offered for the functional hearing benefit, not as a developmental safeguard; and notes that at-risk children such as those with Down syndrome or cleft palate have a lower threshold. [10] [12]

Weak

• "Grommets protect long-term development, so I would insert them as soon as possible." [12]

Branch D — The toddler recovering from meningitis

Examiner: "A two-year-old is recovering from pneumococcal meningitis and is referred for a hearing test in three months. Why is this an emergency, and what do you do?" [1]

Strong

• States that sensorineural hearing loss after bacterial meningitis can trigger cochlear ossification within weeks, narrowing or closing the window for cochlear implantation; explains that three months is too late and every child must have hearing assessed urgently before discharge and again within weeks; and that a child who loses hearing needs early implantation before the cochlea ossifies; adds that congenital CMV is the other cause to consider in any unexplained or progressive loss, confirmed by PCR within three weeks of life. [1] [7]

Weak

• "Routine referral in three months is fine because meningitis hearing loss is usually temporary." [1]

Close

Examiner: "Summarise your approach to childhood hearing loss in one sentence." [1] [6]

Strong

• "Childhood hearing loss is split by site into conductive and sensorineural: universal newborn hearing screening finds the permanent congenital loss before any symptom, and I audit every refer along the one-three-six milestones because the critical period makes speed the treatment; for glue ear I watch and wait three months and offer grommets only for persistent bilateral loss at 25 to 30 dB or worse, knowing the Paradise trials show no developmental benefit; for confirmed permanent loss I fit hearing aids or implant early, while never forgetting that an emissions screen misses auditory neuropathy and that a passed screen does not exclude progressive loss." [1] [6]