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Results for “Stapes Surgery”

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At least 181 records · Page 10Linked to original sources
PubMed1993

Hearing recovery following large and small fenestra stapes surgery for otosclerosis.

Fifty-five ear of 49 patients with otosclerosis were operated on with either large fenestra stapes (stapedectomy; SDE) or small fenestra stapes (stapedectomy; STO) surgery. Pre-operative average hearing levels for the speech frequency ranges (0.5, 1, 2 kHz) were 56.1 dBHL for SDE and 61.0 dBHL for STO. These improved to 39.0 dBHL and 35.0 dBHL. Statistically, significant hearing recovery was obtained for a frequency range from 0.125 to 2 kHz for SDE and from 0.125 to 4 kHz for STO (p < 0.05, Dunnett's multiple variance test). The degree of post-operative hearing improvement for STO was significantly higher at 0.5, 2 and 8 kHz than that for SDE (p < 0.05, Student's t-test). A pre-operative speech discrimination score of 80% was obtained at 68.9 dB for SDE and at 76.0 dB for STO. These values improved to 56.1 dB and 49.5 dB post-operatively. Thus, it was proved that STO results in better hearing than SDE does.

Adolescent↗
PubMed2003

The incudostapedial joint angle: implications for stapes surgery prosthesis selection and crimping.

OBJECTIVE: To evaluate the role of the incudostapedial joint (ISJ) angle in stapes prosthesis size selection and crimping. METHODS: The ISJ of 13 cadaveric human temporal bones were photographed, then measured using computer-aided design software. The relationship of ISJ angle to prosthesis length was modeled. A literature review evaluated factors contributing to stapedectomy failure. RESULTS: The mean ISJ angle was 93.0 degrees (SD = 8.3 degrees ) (range, 75.0 degrees -104.0 degrees ). The mean ISJ angle deviation from 90 degrees was 7.35 degrees (SD = 4.45 degrees ) (range, 0.3 degrees -15.0 degrees ). The mean distance along the incus accessible for prosthesis placement was 3.21 mm (SD = 0.55 mm) (range, 2.00-4.00 mm). CONCLUSIONS: Significant deviation of the ISJ angle from 90 degrees was found (P <.0001). The length along the incus accessible for prosthesis placement was sufficient to result in errors in prosthesis size selection and crimping with only small variations in the ISJ angle. Incorrect prosthesis sizing and crimping are frequently associated with stapedectomy failure. Variations in ISJ anatomy should be considered when selecting stapes prostheses lengths and may affect crimping technique.

Culture Techniques↗