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At least 757 records · Page 42Linked to original sources
PubMed1992

Speech changes following reimplantation from a single-channel to a multichannel cochlear implant.

The speech of a postlingually deafened preadolescent was recorded and analyzed while a single-electrode cochlear implant (3M/House) was in operation, on two occasions after it failed (1 day and 18 days) and on three occasions after stimulation of a multichannel cochlear implant (Nucleus 22) (1 day, 6 months, and 1 year). Listeners judged 3M/House tokens to be the most normal until the subject had one year's experience with the Nucleus device. Spectrograms showed less aspiration, better formant definition and longer final frication and closure duration post-Nucleus stimulation (6 MO. NUCLEUS and 1 YEAR NUCLEUS) relative to the 3M/House and no auditory feedback conditions. Acoustic measurements after loss of auditory feedback (1 DAY FAIL and 18 DAYS FAIL) indicated a constriction of vowel space. Appropriately higher fundamental frequency for stressed than unstressed syllables, an expansion of vowel space and improvement in some aspects of production of voicing, manner and place of articulation were noted one year post-Nucleus stimulation. Loss of auditory feedback results are related to the literature on the effects of postlingual deafness on speech. Nucleus and 3M/House effects on speech are discussed in terms of speech production studies of single-electrode and multichannel patients.

Child↗
PubMed2000

The hydraulic antireflux valve: a new technique for reimplanting dilated ureters.

PURPOSE: Wide ureters have a high risk of urinary reflux if they are implanted in the intestinal segment. Since 1978, we used the continence hydraulic valve as an antireflux device without staples. MATERIALS AND METHODS: A total of 40 patients, 20-65 years old (mean age 50), 36 with bilaterally severely dilated ureters and 4 with unilaterally dilated ureters underwent reconstructive surgery by intestinal segments with a hydraulic antireflux valve (HAV). RESULTS: Mean follow-up was 62 months (range 14-110); upper tract dilatation had improved or stabilized in all patients but one in whom bilateral dilatation occurred with HAV stenosis. All patients underwent follow-up loopogram studies which revealed 2 cases of reflux (4 ureterorenal units). In 1 of the 2 patients the urinary reflux occurred after dessusception (disinvagination) of the nipple. CONCLUSIONS: The HAV is a safe and reliable procedure in preventing reflux when implanting wide ureters into intestinal segments. This technique can be used in continent urinary diversions with intestinal pouches, and can also be used at the proximal level of an ileoureteroplasty. There is no need for staples.

Adult↗