ABSTRACT
Abstract Introduction Modern medicine offers a wide spectrum of different hearing devices, and bone conduction implants can be found among them. Objective The presentation of the outcomes of the implantation of a new active bone conduction hearing implant - the Osia®, and its comparison with the well-known passive transcutaneous system - the Baha® Attract. Methods Eight adult patients with bilateral mixed hearing loss were randomly divided into two groups. Group 1 was implanted with the Osia®, and group 2 was implanted with the Baha® Attract. The details of the surgery were analyzed, along with the functional and audiological results. Results In all the cases, the surgery was successful, and the healing uneventful. In both groups, it was observed that pure tone audiometry and speech audiometry in free field improved significantly after the implantation (mean gain in pure tone audiometry for the Osia group 42.8 dB SPL and for the Baha group 38.8 dB SPL). In the Osia group, the results after the surgery were much better than with the Baha® 5 Power processor on the Softband. The patients implanted with the Osia® evaluated the quality of their hearing as being superior to those implanted with the Baha® Attract. There was an evident improvement in the abbreviated profile of hearing aid benefit questionnaire and in the speech, spatial and qualities of hearing scale for both systems. In the abbreviated profile of hearing aid benefit, changes were more evident in the Osia group (in global score 49% vs. 37.2%). Conclusion Implantation of the Osia® is an effective treatment option for the patients with bilateral mixed hearing loss. The surgery is safe but more complex and time-consuming than the Baha® Attract implantation. The preliminary audiological results as well as the overall quality of life indicate that the Osia® is a better solution than the Baha® Attract. However, future studies should be carried out to make further observations in a larger group of patients, and with longer follow-up.
Resumo Introdução A medicina moderna oferece um amplo espectro de diferentes aparelhos auditivos, e implantes de condução óssea estão entre eles. Objetivo Apresentação dos resultados do uso de um novo implante auditivo de condução óssea ativa - o Osia® e sua comparação com o conhecido sistema transcutâneo passivo - o sistema Baha® Attract. Método Oito pacientes adultos com perda auditiva mista bilateral foram divididos aleatoriamente em dois grupos. O grupo 1 foi implantado com o Osia® e o grupo 2 foi implantado com o sistema Baha® Attract. Os detalhes da cirurgia foram analisados, juntamente com os resultados funcionais e audiológicos. Resultados Em todos os casos, a cirurgia foi bem-sucedida e a cicatrização ocorreu sem intercorrências. Nos dois grupos, observou-se que a audiometria de tons puros e a audiometria de fala em campo livre melhoraram significativamente após o implante (ganho médio na audiometria para tons puros para o grupo Osia® de 42,8 dB NPS e para o grupo Baha®, 38,8 dB NPS). No grupo Osia®, os resultados após a cirurgia foram muito melhores do que com o processador Baha® 5 Power no sistema SoftBand. Os pacientes implantados com o Osia® avaliaram melhor a qualidade de sua audição do que os implantados com o sistema Baha® Attract. Houve uma melhoria evidente no questionário abbreviated profile of hearing aid benefit e na escala speech, spatial and qualities of hearing, para ambos os sistemas. No questionario abbreviated profile of hearing aid benefit, as mudanças foram mais evidentes no grupo Osia® (escore global 49% vs. 37,2%). Conclusão O sistema Osia® é uma opção de tratamento eficaz para pacientes com perda auditiva mista bilateral. A cirurgia é segura, mas mais complexa e demorada que a implantação do sistema Baha® Attract. Os resultados audiológicos preliminares, bem como aqueles avaliando a qualidade de vida, indicam que o Osia® é uma alternativa melhor que o Baha® Attract. Entretanto, mais observações são necessárias em grupos maiores de pacientes e com tempo de seguimento mais longo.
ABSTRACT
Objective To improve the design plan and get a piezoelectric actuator with displacement magnification structure,so as to reduce power consumption of the existing incus-stimulating piezoelectric actuator for middle ear implant.Methods Based on anatomical structure of human ear,the piezoelectric actuator with displacement magnification structure,and the one only composed of piezoelectric stack were designed,respectively,then the corresponding coupled mechanical models of the middle ear with the piezoelectric actuator were established.By comparing the calculation results from the two types of coupled mechanical models,the hearing compensation property and power consumption of the actuator before and after the implantation with the displacement magnification structure were analyzed.Results After adding the displacement magnification structure,the sound pressure level (SPL) at 1 kHz frequency was increased from 100 dB to 113 dB when the piezoelectric actuator was stimulated by 10.5 V effective voltages.In addition,for the piezoelectric stack,its power consumption at the frequency of 1,2 and 4 kHz were 6.42,1.56 and 0.28 mW,respectively;after introducing the displacement magnification structure,the power consumption at the above-mentioned 3 frequencies decreased to 0.39,0.09 and 0.01 mW,respectively.Conclusions Piezoelectric actuator with displacement magnification structure in this study can improve hearing compensation ability of the incus-stimulating middle ear implant,and effectively reduce the power consumption.The research findings will help to further improve the structure design of middle ear implant,thus achieving better hearing compensation effect.
ABSTRACT
Objective To improve the design plan and get a piezoelectric actuator with displacement magnification structure,so as to reduce power consumption of the existing incus-stimulating piezoelectric actuator for middle ear implant.Methods Based on anatomical structure of human ear,the piezoelectric actuator with displacement magnification structure,and the one only composed of piezoelectric stack were designed,respectively,then the corresponding coupled mechanical models of the middle ear with the piezoelectric actuator were established.By comparing the calculation results from the two types of coupled mechanical models,the hearing compensation property and power consumption of the actuator before and after the implantation with the displacement magnification structure were analyzed.Results After adding the displacement magnification structure,the sound pressure level (SPL) at 1 kHz frequency was increased from 100 dB to 113 dB when the piezoelectric actuator was stimulated by 10.5 V effective voltages.In addition,for the piezoelectric stack,its power consumption at the frequency of 1,2 and 4 kHz were 6.42,1.56 and 0.28 mW,respectively;after introducing the displacement magnification structure,the power consumption at the above-mentioned 3 frequencies decreased to 0.39,0.09 and 0.01 mW,respectively.Conclusions Piezoelectric actuator with displacement magnification structure in this study can improve hearing compensation ability of the incus-stimulating middle ear implant,and effectively reduce the power consumption.The research findings will help to further improve the structure design of middle ear implant,thus achieving better hearing compensation effect.
ABSTRACT
Objective To design an improvement plan of piezoelectric actuator with displacement magnification structure, so as to reduce power consumption of the existing incus-stimulating piezoelectric actuator for middle ear implant. Methods First, based on anatomical structure of human ear, the piezoelectric actuator with displacement magnification structure and the one just composed of piezoelectric stack were designed, respectively, and the corresponding coupled mechanical models of the middle ear and the piezoelectric actuator were established. By comparing the calculation results from the two types of coupling mechanical models, the hearing compensation property and power consumption of the actuator before and after the implantation of displacement magnification structure were analyzed. Results After adding the displacement magnification structure, the sound pressure level (SPL) at 1 kHz frequency was increased from 100 dB to 113 dB, when the piezoelectric actuator was stimulated by 10.5 V effective voltage. In addition, when the actuator was stimulated by the piezoelectric stack, its power consumption at the frequency of 1, 2 and 4 kHz were 6.42, 1.56 and 0.28 mW, respectviely; after introducing the displacement magnification structure, power consumption at the above-mentioned 3 frequencies decreased to 0.39, 0.09 and 0.01 mW, resepectively. Conclusions Piezoelectric actuator with displacement magnification structure in this study can improve hearing compensation ability of the incus-stimulating middle ear implant and effectively reducing the power consumption. The research findings will help to further improve the structure design of middle ear implant, thus achieving better hearing compensation effect.
ABSTRACT
Objective To improve the design plan and get a piezoelectric actuator with displacement magnification structure,so as to reduce power consumption of the existing incus-stimulating piezoelectric actuator for middle ear implant.Methods Based on anatomical structure of human ear,the piezoelectric actuator with displacement magnification structure,and the one only composed of piezoelectric stack were designed,respectively,then the corresponding coupled mechanical models of the middle ear with the piezoelectric actuator were established.By comparing the calculation results from the two types of coupled mechanical models,the hearing compensation property and power consumption of the actuator before and after the implantation with the displacement magnification structure were analyzed.Results After adding the displacement magnification structure,the sound pressure level (SPL) at 1 kHz frequency was increased from 100 dB to 113 dB when the piezoelectric actuator was stimulated by 10.5 V effective voltages.In addition,for the piezoelectric stack,its power consumption at the frequency of 1,2 and 4 kHz were 6.42,1.56 and 0.28 mW,respectively;after introducing the displacement magnification structure,the power consumption at the above-mentioned 3 frequencies decreased to 0.39,0.09 and 0.01 mW,respectively.Conclusions Piezoelectric actuator with displacement magnification structure in this study can improve hearing compensation ability of the incus-stimulating middle ear implant,and effectively reduce the power consumption.The research findings will help to further improve the structure design of middle ear implant,thus achieving better hearing compensation effect.