Abdelhamid Benghalem1, Dzemal Gazibegovic2, Fatima Saadi3, Zakia Tazi-Chaoui4. 1. a ENT Department , CLINIQUE RACHIDI , Casablanca , Morocco. 2. b Clinical Research International, AB AG , Stäfa , Switzerland. 3. c RIFMED , Casablanca , Morocco. 4. d Groupe Radiologique de Casablanca , Casablanca , Morocco.
Abstract
CONCLUSIONS: Atraumatic insertion of the HiFocusTM Mid-Scala (HFMS) electrode via the round window was successfully achieved in seven children. Residual hearing 6 months post-operatively was preserved to within 10 dB HL of the pre-operative audiogram at 500 Hz for six children, indicating minimal initial insertion trauma to the cochlea. OBJECTIVES: The objectives were to document the clinical experience and evaluate differences between HFMS and HiFocusTM 1j (HF1j) by means of insertion depth and hearing preservation results. METHOD: Nineteen children were prospectively recruited and consecutively implanted with the HF1j electrode (n = 12) or the HFMS electrode (n = 7) via the round window. Average median angular insertion depths and the amount of residual hearing preserved at 6 months post-operatively were compared between the two electrode groups. RESULTS: The median angular insertion depth for the HF1j was 439° and for the HFMS 435°. Preservation of residual hearing at 500 Hz was assessed in seven HFMS subjects and 11 HF1j subjects. Based on the Skarzynski formula, three out of seven subjects (42%) in the HFMS group had their residual hearing completely preserved at 500 Hz. In the control group, no subjects had complete hearing preservation and five subjects had a complete loss of residual hearing.
CONCLUSIONS: Atraumatic insertion of the HiFocusTM Mid-Scala (HFMS) electrode via the round window was successfully achieved in seven children. Residual hearing 6 months post-operatively was preserved to within 10 dB HL of the pre-operative audiogram at 500 Hz for six children, indicating minimal initial insertion trauma to the cochlea. OBJECTIVES: The objectives were to document the clinical experience and evaluate differences between HFMS and HiFocusTM 1j (HF1j) by means of insertion depth and hearing preservation results. METHOD: Nineteen children were prospectively recruited and consecutively implanted with the HF1j electrode (n = 12) or the HFMS electrode (n = 7) via the round window. Average median angular insertion depths and the amount of residual hearing preserved at 6 months post-operatively were compared between the two electrode groups. RESULTS: The median angular insertion depth for the HF1j was 439° and for the HFMS 435°. Preservation of residual hearing at 500 Hz was assessed in seven HFMS subjects and 11 HF1j subjects. Based on the Skarzynski formula, three out of seven subjects (42%) in the HFMS group had their residual hearing completely preserved at 500 Hz. In the control group, no subjects had complete hearing preservation and five subjects had a complete loss of residual hearing.
Authors: Attila Ovari; Lisa Hühnlein; David Nguyen-Dalinger; Daniel Fabian Strüder; Christoph Külkens; Oliver Niclaus; Jens Eduard Meyer Journal: J Clin Med Date: 2022-08-31 Impact factor: 4.964