Establishment and the clinical application of the new evaluation of hypernasality using the sound visualization system

上颌骨切除术后的鼻音过重和后咽功能不全成为患者的主要压力。闭孔义齿用于恢复正常的语言。所以我们精确地联系功能，并适当地治疗疾病。通常，感觉评估对于鼻咽功能的评估是重要的，然而，由于临床经验的差异，在评估中发现不均匀性。因此，有必要将鼻功能评分（NS）与纤维内窥镜检查结果相结合，以提高鼻功能评价的可靠性。这些仪器价格昂贵，购买困难，存在不能在所有机构使用的缺点，而且无创性，要求技术可靠，但至今未见报道。我们以这些数据和技术为基础，思考是否可以建立一种新的评价方法。一个观点是将特征频率区域与NS联系起来，并且能够评估我们一眼就确定的鼻音。研究对象为10例上颌骨切除术后戴用闭孔义齿的患者。我们在佩戴后或佩戴前进行NS测量，并将话语声音记录到数字记录器中，并通过声音分析软件Multi-Speech测量特征频率区域。戴用后NS明显降低。特征频率区域电平与佩戴前的F1、F2比较，佩戴后的值降低。

Hypernasality and the velopharyngeal insufficiency after the maxillary resection become the major stress for the patients. Obturator prosthesis is used to restore a normal language. So we associate the function precisely, and treat the disorders appropriately. Generally, a perceptual assessment is important to an evaluation of the nasopharyngeal function, however unevenness is found in an evaluation by a difference of the clinical experience. Therefore it is necessary to raise the reliability of the evaluation by putting the testing using the instrument including nasalance scores (NS) and the fiberscope finding. These instruments are expensive, and the purchase is difficult, and there is the fault that we cannot use in all institutions, and we are noninvasive, and reliable technique is demanded, but there is not the report of these technique so far. We assumed these data and technique a base and thought whether we could not establish a new assessment method. A viewpoint is to link a characteristic frequency region to NS, and it is to be able to assess the hypernasality which we determined at a glance. The subject is ten patients who wear obturator prostheses after maxillary resection. We conducted NS measurement after wearing if before obturator prostheses wearing and recorded an utterance sound to a digital recorder and measured a characteristic frequency region by a sound analysis software Multi-Speech. NS were reduced after wearing the prostheses. The characteristic frequency region level compared F1, F2 before wearing prpstheses together, and a value decreased after wearing.