Comparison of Audiometric and Functional Outcomes Between the Standard and Modified 360 Nitinol Shape Memory Stapes Prostheses. Issue 8 (September 2015)

• Record Type: Journal Article
• Authors: Lavy, Jeremy; Huins, Charlie; Khalil, Sherif; Hall, Andrew; Hughes, Owain
• Is Part Of: Otology & neurotology. Volume 36:Issue 8(2015)
• Publication Date: 2015-09
• Subjects: Otology -- Periodicals; Ear -- Diseases -- Periodicals; Skull base -- Surgery -- Periodicals; 617.8005
• DOI: 10.1097/MAO.0000000000000816
• Languages: English
• ISSNs: 1531-7129

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <sec> <title>Objective</title> <p>To compare audiometric and functional outcomes between two designs of heat-activated self-crimping stapes prostheses—a modified shape memory circumferential nitinol-Teflon piston versus its predecessor—in patients with otosclerosis.</p> </sec> <sec> <title>Study Design</title> <p>A retrospective analysis of preoperative and postoperative hearing thresholds.</p> </sec> <sec> <title>Setting</title> <p>Tertiary referral center and teaching hospital.</p> </sec> <sec> <title>Patients</title> <p>One hundred sixty-three consecutive procedures of primary stapes surgery for clinically proven otosclerosis in 108 women and 55 men with an average age of 46 years.</p> </sec> <sec> <title>Intervention</title> <p>Stapedotomy and insertion of either a standard or a circumferential stapes prosthesis.</p> </sec> <sec> <title>Main Outcome Measures</title> <p>Four-frequency pure-tone average preoperative and postoperative air-bone thresholds were recorded. A secondary outcome measure was stability of the implant, as measured by failure rates.</p> </sec> <sec> <title>Results</title> <p>Success of closure of the air-bone gap to within 10 dB was achieved in 97% and comparable in both groups (original prosthesis, 23.6; standard deviation, 7.3, with the average reduction seen in the circumferential prosthesis group being 22.6, standard deviation, 5.6). All the differences were not statistically significant using two-way analysis of variance. Failure rate for the original piston was 6%, with no failures seen with the circumferential piston.</p> </sec> <sec> <title>Conclusion</title> <p>Both prostheses showed comparable postoperative hearing outcomes, with the circumferential prosthesis being found to be more stable.</p> </sec> </abstract>