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Biomedical subjects

E Teunissen

Publications and source records attributed to E Teunissen.

6 recordsLinked to original sources
PubMed1993

Surgery for congenital anomalies of the middle ear with mobile stapes.

In a series of 104 patients with congenital middle ear anomalies operated on from 1964 to 1986, 27 cases were found in which the stapes footplate was mobile and the conductive deafness was due to an anomaly in the remaining part of the ossicular chain. In 8 cases the middle ear anomaly was caused by discontinuity of the ossicular chain owing to congenital malformation. In the other 19 ears, epitympanic fixation of the ossicular chain was observed, whether or not in combination with malformation of the stapes, incus or malleus. Ossicular chain reconstruction produced an improvement of at least 15 dB in 6 of the first 8 cases with discontinuity of the ossicular chain. The mean gain was 31 dB. Epitympanotomy with exposure of the fixed ossicle and if necessary ossicular chain reconstruction led to an improvement of at least 15 dB in 12 of the 19 ears, with a mean gain of 28 dB.

Adolescent↗
PubMed1991

The impact of a syndromal diagnosis on surgery for congenital minor ear anomalies.

Between 1964 and 1986, 104 ears of 86 patients with a minor congenital ear anomaly underwent an exploratory tympanotomy at the Institute of Otorhinolaryngology of the University Hospital Nijmegen. A classification of these anomalies is proposed based on the surgical findings and results. The 4 groups in this classification are: isolated stapes ankylosis, stapes ankylosis associated with an anomaly of the malleus and incus, an isolated anomaly of the malleus and incus with a mobile stapes footplate and finally, aplasia of the oval and/or round window. In a total of 29 ears (22 patients) out of these 104 ears, the anomaly formed part of a syndrome. The various syndromes and the anomalies encountered are discussed. The impact of a syndromal diagnosis on the outcome of reconstructive ear surgery is discussed per syndrome.

Abnormalities, Multiple↗
PubMed1991

Frequency resolution after successful surgery in congenital ear anomalies.

Frequency resolution was studied in patients with a unilateral congenital ear defect (atresia), who were successfully operated on. Psychophysical tuning curve (PTCs) were obtained. A comparison of the shapes of the PTCs revealed that the average curve for all the patients was much alike for the operated and non-operated (normal) ear: broad tuning curves, as reported from animal studies, were not found. After appropriate corrections were made for the small remaining air-bone gaps, as seen in all patients, the PTCs of all the operated ears lay reasonably well within the 2 S.D. range of the average PTC obtained in subjects with normal hearing.

Adolescent↗