Biomedical subjects

P Chute

Publications and source records attributed to P Chute.

3 recordsLinked to original sources

PubMed1991

Cochlear implants: indications and technology.

Over the last decade, the field of cochlear implants has progressed to the point where many postlinguistically deaf adults can use a multichannel device to understand speech without lipreading. The remainder are able to use their devices to aid in lipreading and to discriminate environmental sounds. It is anticipated that improved processing schemes will be developed so that the cochlear implant user can expect better speech perception with these devices. Eventually, a more sophisticated cochlear implant that has the capability of permitting good speech discrimination may supplant hearing aids for severely deafened individuals. Regardless of future developments, the present-day systems effectively restore auditory function to profoundly deafened children and adults.

Cochlear Implants↗

PubMed1986

A review of twenty congenital cholesteatomas of the middle ear in children.

Cholesteatomas, arising within the middle ear space behind an intact tympanic membrane, have been detected more frequently in recent years. This article reviews 19 children (with a mean age of 4.3 years) who underwent surgery over a 7-year period for removal of cholesteatomas from behind intact tympanic membranes. Most of these children were referred by pediatricians who had detected an asymptomatic whitish middle ear mass. Many had histories of treatment for otitis media. Patients with similar histories were excluded from the series if there had been a prior perforation, myringotomy, or otologic surgery. In the series, one fourth of the children had associated congenital malformations, and there were 3 times as many boys as girls. In two thirds of the cases, the cholesteatoma was manifested as an anterior-superior middle ear mass that seemed to arise from the processus cochleariformis, undersurface of malleus area. Many could be removed via an extended anterior tympanotomy operative approach. The results of surgery are reviewed. The possible origins of these localized cholesteatomas are considered. Are they congenital defects that arise from misplaced keratinizing epithelium? Do they arise from mesenchymal cells whose differentiation is stimulated by inflammatory changes within the middle ear?

Child↗

PubMedDate not supplied

Cholesteatoma in the pediatric age group.

The diagnosis and management of cholesteatoma in children remains controversial. In the past 15 years, the senior author (S.C.P.) has treated 320 patients with cholesteatoma. Patients 18 years and younger composed 40% (125) of the overall group and are the basis for this report. The patient data were compiled using the history, physical examination, audiograms, radiographs, patient questionnaires, surgical findings, and postoperative observations. The surgical treatment selected was determined by the extent of disease, the configuration of the mastoid, and a clinical assessment of eustachian tube function. A middle ear tympanotomy approach was used in 17% of the patients, a canal wall up procedure in 31%, and a canal wall down procedure in 52.3%. The average clinical follow-up was 3.9 years, with the range being from 3 months to 13.5 years. Hearing was maintained or slightly improved in a majority of cases. Residual disease occurred in 8% of patients, and recurrent disease in only 3%.

Adolescent↗