Audiometrische Ergebnisse und Patientenzufriedenheit mit der Vibrant Soundbridge im Vergleich zur Bonebridge bei Patienten mit kombinierter Schallleitungs- und Schallempfindungsschwerhörigkeit

Abstract

The objectives of the study were to review and evaluate functional results and satisfaction of patients with the active middle ear implant Vibrant Soundbridge and compare these results with a new active bone conduction implant Bonebridge. A retrospective chart review of 13 patients (13 ears) after implantation of the Vibrant Soundbridge and 11 patients (12 ears) after implantation of the Bonebridge in one tertiary referral center between Septemper 2008 and March 2014 was performed. All patients suffered from mixed hearing loss. Outcome measures were pure-tone audiometry (air conduction and bone conduction thresholds, air-bone gap and functional gain), speech audiometry (Freiburg Monosyllabic Test in quiet and in noise, Oldenburger Sentence Test) and a patient satisfaction questionnaire (Glasgow Benefit Inventory). Average functional gain was 33,2 ± 12,3 dB and 26,4 ± 9,4 dB, monosyllable recognition improved from 25,4 ± 25,1 % (unaided) to 82,7 ± 15,0 % (aided) and 14,2 ± 16,4 % to 84,2 ± 13,0 %, mean speech reception thresholds (SRTs, 50%-correct level) of the Oldenburg Sentence Test (OLSA) improved significantly from -0,1 ± 4,1 dB SNR to -2,7 ± 2,9 dB SNR and from 2,3 ± 3,3 dB to -1,4 ± 3,4 dB SNR after implantation, Glasgow Benefit Inventory total score was 34,9 ± 12,2 and 32,8 ± 14,5 in patients with Vibrant Soundbridge and Bonebridge, respectively. In two patient collectives matched for degree of mixed hearing loss, the Bonebridge shows comparable and satisfying results to the Vibrant Soundbridge in pure-tone and speech audiometry. Patient satisfaction with both devices was high and comparable.