14Patient Selection in Pediatric and Bilateral Disease

FWhen the patient is not a standard adult

Most of what we teach about ossiculoplasty assumes a particular patient: an adult, with one diseased ear and a serviceable ear on the other side, in whom the surgeon can chase the best possible air–bone gap (ABG) without much fear of making things worse. Several common situations break that comfortable assumption. The patient may be a child, whose middle ear is still developing and whose eustachian tube ventilates poorly. The disease may be bilateral, so there is no healthy ear to fall back on. Or the ear in front of you may be the patient’s only hearing ear, where a single bad outcome means deafness.

In each of these settings the calculus of patient selection shifts. The question stops being simply can I close the gap? and becomes should I reconstruct this ear, now, in this person — and what do I risk if I do? The technical menu of prostheses and grafts is the same; what changes is the weighting we give to ventilation, to disease control, and above all to hearing preservation. This module walks through the three scenarios that most often temper the decision to operate.

FWhy children are different: the immature ear

Children are not small adults. Their middle ears sit in a head that is still growing, and the structure that governs middle-ear health — the eustachian tube— is functionally immature. In infancy and early childhood the tube is short, near-horizontal and relatively floppy, and the dilating muscles that open it on swallowing have poor mechanical leverage. As the skull base develops it lengthens and steepens toward the adult orientation of roughly 45°, and active opening becomes far more reliable. Until then the tube clears secretions and equalises pressure poorly.

This matters enormously for reconstruction. A prosthesis depends on a ventilated, aerated middle ear to stay where it is put. In an under-ventilated cleft the pressure drifts negative, effusion accumulates, the drum retracts, and the prosthesis is pulled, displaced or extruded. It is no surprise, then, that residual eustachian tube dysfunction is the single commonest problem complicating pediatric ossiculoplasty, and that outcomes in children lag behind those in adults. In one large pediatric series, only about 28% of reconstructions reached a normal post-operative pure-tone average, and roughly a third needed revision— most often because the prosthesis had displaced [2017].

There is a second, subtler problem of timing: childhood disease, particularly cholesteatoma, has a real tendency to recur, and the ear keeps changing as the child grows. Committing a prosthesis to an ear that may need re-exploration is a poor bargain. These two facts — poor ventilation and the likelihood of further disease — are why patient selection in children leans so heavily toward controlling the ear before reconstructing it.

TChoosing technique and timing in children

Once a child’s ear is dry, disease-free and aerated, the same biomechanical principles apply — but the evidence points to clear preferences. The most consistent finding across pediatric series and a dedicated meta-analysis is that a partial prosthesis (PORP) resting on an intact, mobile stapes superstructure, or an autograft incus interposition, gives better hearing than a total prosthesis (TORP) to the footplate [2023, 2025]. Part of this is selection — children who still have a superstructure start with less destroyed ears — but part is mechanical: a PORP on a superstructure is a more stable, better-coupled construct than a tall TORP balanced on the footplate.

The practical rules that follow are straightforward. Preserve and use the stapes superstructure whenever it is present.Where the chain can be bridged with the child’s own sculpted incus, that autograft is biocompatible, cheap, resistant to extrusion and mechanically favourable. Reserve the TORP for ears that genuinely have no usable superstructure, and counsel accordingly.

Timing is the other lever. Because ventilation is the rate-limiting problem, pediatric reconstruction is often best staged— deferred to a second sitting after a planned second look has confirmed the ear is clear of cholesteatoma and has aerated. Many surgeons treat the eustachian tube before committing a prosthesis, and there is a long-standing rationale that adenoidectomy and ventilation improve eustachian tube function and reduce the effusion-and-displacement cycle that wrecks pediatric reconstructions. The goal is to place the prosthesis into the friendliest middle ear the child can offer, not the first one available.

TBilateral disease and the order of operations

When chronic ear disease is bilateral, the central problem is that there is no spare ear. Every adult and child with disease on both sides depends, at any given moment, on whichever ear hears better, and the surgeon must protect that reserve. Two principles follow, and they are widely held convention.

First, stage the two sidesrather than operating simultaneously. Bilateral middle-ear surgery in one sitting risks bilateral packing, bilateral vestibular upset, and — the real fear — a complication that leaves the patient with worse hearing in both ears at once. Second, operate on the worse, more diseased ear first. Starting with the worse side means the patient keeps the better ear as a hearing reserve while the first ear heals, and it lets the surgeon learn the disease before touching the more precious side. A useful corollary: if the first-side surgery throws up an unexpected event that raises the risk of iatrogenic hearing loss, the second-side procedure can and should be deferred.

Selection in bilateral disease is therefore as much about sequencingas about whether to reconstruct at all. Active disease such as cholesteatoma still has to be controlled surgically — amplification does not eradicate it — but the second ear’s reconstruction is contingent on the first ear’s result. In the interval, and sometimes permanently for one side, a hearing aid carries the patient. The watchword is the same one that governs the next, most extreme scenario: preserve what hearing exists before chasing more.

CThe only hearing ear: maximal stakes

The only hearing ear— an ear in a patient whose other ear is dead or non-serviceable — is the situation in which every instinct toward aggressive gap closure must be reined in. Here a single sensorineural injury does not merely blunt the result; it can render the patient totally deaf. Historically this led to a near-prohibition on operating, but that stance has softened, for a sound reason: uncontrolled disease, especially cholesteatoma, can itself destroy the ear, so refusing to operate is not automatically the safe choice.

The modern evidence supports careful, selective surgery. A meta-analysis of chronic otitis media surgery in the only hearing ear found that air-conduction and bone-conduction thresholds were stable or improved in the large majority of ears — around 88% and 95%respectively — while a minority deteriorated, with bone-conduction (true sensorineural) loss in only a few per cent [2022]. Series of only-hearing-ear surgery confirm that ears can reliably be rendered dry and hearing rehabilitated afterward, whether by amplification or, in profound cases, cochlear implantation [2014].

Three rules govern selection here. Prioritise disease control and hearing preservation over ABG closure— a dry, safe, slightly-aided ear beats a marginally better gap bought at the risk of deafness. Counsel explicitly about the small but genuine chance of sensorineural deterioration, in plain numbers, and document it. And have a rehabilitation plan in place before you operate — the hearing aid or implant that will carry the patient if hearing is lost is part of the consent, not an afterthought.

CPutting selection together

Across all three scenarios the same theme recurs: in special populations the surgeon trades some pursuit of the perfect air–bone gap for safety, ventilation and preserved hearing. The factors that temper the decision differ by population, but the disciplined response — control the disease, respect the ventilation, stage when in doubt, and protect the hearing reserve — is shared. The selector below summarises what weighs on each decision.

None of this argues against operating — children, bilateral cases and only-hearing ears all benefit from well-chosen surgery, and modern outcome data are reassuring. It argues instead for matching ambition to circumstance. The reconstructive technique you reach for in a dry, primary, adult ear with a normal opposite side is not the strategy you bring to a 6-year-old with a recurrent cholesteatoma and a flat tympanogram, nor to a patient whose only working ear sits before you. Reading those differences correctly is the substance of patient selection in pediatric and complex disease [1994, 2001].