Chouard C H, Ouayoun M, Meyer B, Fugain C
ENT Department, Hôpital Saint-Antoine, Paris, France.
Acta Otolaryngol. 1995 Mar;115(2):264-8. doi: 10.3109/00016489509139305.
The Digisonic is a fully digitized cochlear implant. Because of its articulated array, its 15 electrodes can be inserted in the cochlea. Each electrode is recessed in a special silastic compartment of the array and has a very large stimulation area thanks to its large microrelief surface area. The small volume of its implanted receiver (flat cylinder diam 29 mm, 6.9 mm thick) allows it to be placed in 2-year-old children. The 128 point FFT of this device supply the patient with a full set of sound information between 64 and 7800 Hz. Electrode stimulation mode is sequential and stimulation rhythm is programmable. Electric crosstalk is decreased by the shape of the electrode array, and optionally by special programming of the neighboring electrodes. The speech therapist may select the width and peak value of each frequency band handled by each functional electrode. Because the versatility of this digitized emitter, many speech coding strategies can be easily programmed as a function of electrode responses or particular scientific considerations. A special version of this device, consisting of 10 separate electrodes, has been designed for use in patients with total obstruction of the cochlea. These insulated wires may be inserted one by one in the inner ear in 10 different recesses gently drilled in the bony cochlea. This device was placed in 46 patients between 1992 and 1994, including 8 young children (aged 2-9 years, mean 5 years) and 9 patients with total cochlear obstruction.
Digisonic是一种全数字化人工耳蜗。由于其铰接式阵列，其15个电极可以插入耳蜗。每个电极都凹进阵列的一个特殊硅胶隔室中，由于其大的微浮雕表面积，具有非常大的刺激区域。其植入式接收器体积小（扁平圆柱体直径29毫米，厚6.9毫米），可植入两岁儿童体内。该设备的128点快速傅里叶变换为患者提供64至7800赫兹的全套声音信息。电极刺激模式是顺序式的，刺激节奏是可编程的。电极阵列的形状可减少电串扰，也可通过对相邻电极进行特殊编程来减少。言语治疗师可以选择每个功能电极处理的每个频段的宽度和峰值。由于这种数字化发射器的多功能性，许多语音编码策略可以根据电极反应或特定的科学考虑轻松编程。该设备的一个特殊版本由10个独立电极组成，专为耳蜗完全阻塞的患者设计。这些绝缘线可以一根一根地插入内耳，插入在骨性耳蜗中轻轻钻出的10个不同凹槽中。1992年至1994年期间，该设备被植入46名患者体内，其中包括8名幼儿（年龄2至9岁，平均5岁）和9名耳蜗完全阻塞的患者。
