Systemic methylprednisolone for hearing preservation during cochlear implant surgery: A double blinded placebo-controlled trial.

AIM: To assess whether a single, peri-operative, high dose of methylprednisolone can improve the preservation of residual acoustic hearing following cochlear implantation (CI). METHODS: This was a double blinded placebo-controlled trial, performed in a tertiary academic centre. The hypothesis was that methylprednisolone would improve the preservation of hearing, and lower electrode impedances. Adult patients (18-85 years) with hearing at 85 dB or better at 500 Hz in the ear to be implanted were randomly allocated to either treatment (methylprednisolone, 1g administered intravenously upon induction of anaesthesia) or control (normal saline infusion). As per standard clinical practice, all patients received a routine dose of dexamethasone (8 mg intravenously) on induction of anaesthesia. Implantation was undertaken with a slim and flexible lateral wall electrode via the round window. Surgical technique was routine, with adherence to soft surgical principles. The primary outcome was hearing preservation within 20 dB at 500 Hz, 12 months following cochlear implantation. Secondary outcomes included hearing preservation at 6 weeks and 3 months, monopolar electrode impedance, and Consonant-Vowel-Consonant (CVC) Phoneme scores at 3 and 12 months after surgery. RESULTS: Forty-five patients were enrolled into the control group and 48 patients received the steroid. The number of patients achieving hearing preservation at 12 months did not differ significantly between those receiving methylprednisolone treatment and the controls. There were no differences in hearing preservation at any frequency at either 6 weeks or 3 months after implantation. Neither CVC phoneme scores nor electrode impedances differed between the groups. CONCLUSIONS: This paper demonstrates that high-dose local steroid injection at surgery was not effective in preventing a loss of residual hearing, improving speech perception, or lowering electrode impedances. The findings were contrary to the experimental literature, and emerging clinical evidence that steroid elution from implant electrodes influences cochlear biology in humans. We found no evidence to support the widely-held practice of administering intravenous steroids in the perioperative period, in an attempt to preserve residual hearing.

Outcomes of primary myringoplasty in indigenous children from the Northern Territory of Australia.

AIM: To report the surgical and audiological outcomes of myringoplasty (Type I tympanoplasty) in Indigenous Australian children living in remote and regional communities in northern Australia. METHOD: An observational cohort study, with prospective recording of the details of surgery. Audiological outcomes were collected independently, and these data were integrated in the present study. Children aged 5-18 year underwent myringoplasty in the Northern Territory during a program initiated by the Australian Government. Surgery was performed by surgeons drawn from across Australia. RESULTS: 412 primary myringoplasties were performed. The mean age at surgery was 11 years. The tympanic membrane was closed in 64.2% of cases. Fascial grafting was associated with greater surgical success than cartilage. Dryness of the ear at surgery did not affect drum closure. Post-operative aural discharge was half that reported in historical literature. Surgical success was independent of the patient's age at surgery. Post-operative audiograms were available on 216 cases. At last review, hearing had improved even when the operation was not a surgical success, with hearing aid candidacy falling from 84 to 34%. Hearing was similar irrespective of the size of the perforation at surgery or the graft used and did not change with the time between surgery and review. The best hearing was associated with drum closure and Types A or C tympanograms. A conductive hearing loss persisted after surgery that was greater when there was an immobile drum. CONCLUSIONS: Indigenous children benefited from myringoplasty, even when the operation was not a "surgical success" as deemed by drum closure. There lower incidence of post-operative discharge from persistent perforations suggests an improvement in the ear health of the population. A persistent conductive loss persists, likely a consequence of the underlying disease but possibly from the surgery.