A Trial Manufacture of Rhinomanometer with Percentage Expression

鼻腔阻力是鼻腔测压中表示鼻腔通畅的常用方法。流量和压力之间的关系是曲线，因此根据参照点的不同，受试者的阻力值也不同。尽管国际委员会和日本委员会努力确定了唯一的一个参照点，但尚未得出结论。鼻腔通畅率的概念就是在上述问题上提出来的。除起始点外，许多受试者的压力流动曲线并不交叉。这意味着鼻腔内的气动特性是相似的，如果一条曲线用公式y=f(X)表示，其他曲线就用公式乘以n来表示。第一年，压力流量曲线的流量信号在沿x轴以2.5pa的相同间隔进行采样，并通过A-D转换器进行数字化。使用个人计算机在相同的压力点将每个流量值除以另一个流量值。T…再多一点，我们就能得到很多商数。这些商数非常相似，并用标准差进行了数学平均。在相同压力点下的计算意味着比较电阻或电导，换句话说，完成了整个曲线的比较。如果其中一条曲线是标准曲线，则用比率或百分比表示病因子值。在第二年，我们用普通鼻压计的内置微型计算机进行了几乎相同的手术。结果令人满意。在第三年，一个额外的数据终端连接到鼻压计。一张K字节的RAM卡可以存储16条曲线，并在需要时将它们发送回鼻压计。此外，这些数据也被发送到个人计算机进行进一步分析。从鼻腔空气动力学比较的角度来看，鼻腔通畅率的表达是合理的，从业人员可以理解，临床和实验研究都是准确的。较少

The nasal resistance is a usual way to express patency of the nasal cavity in rhinomanometry. The relationship between flow and pressure is curvilinear, so the value of the resistance is different in a subject according to the reference point. Although the international and Japanese committees paid great endeavor to decide the only one reference point, the conclusion was not yet attained. The idea of percent expression of nasal patency began from the above mentioned problem. Pressure flow curves from many subjects do not cross each other except the origin. This means that aerodynamic characteristics in the nasal cavities are similar and that if a curve is expressed by a formula y=f (x), others are expressed by multiplying the formula by n.In the first year, flow signals of a pressure flow curve were sampled at the same interval of 2.5 Pa along the x axis, and digitalized by A-D converter. Each flow value was divided by another one at the same pressure point using a personal computer. T … More hus, we could obtain many quotients. These quotients were very similar and mathematically averaged with a standard deviation. Calculations at the same pressure points meant comparison of resistance or conductance, in other words, comparison of the whole curve was accomplished. If one of the curves was standard, pathognomonic values were expressed as ratio or percentage. If one was preoperative, postoperative improvement was evaluated.In the second year, we performed almost the same procedure by built-in microcomputer of an ordinary rhinomanometer. Satisfactory results were obtained.In the third year, an additional data terminal was connected to the rhinomanometer. A 64 K Byte RAM card could memorize 16 curves and send them back to the rhinomanometer whenever necessary. Besides, these data were also sent to a personal computer to promote further analyses.Percent expression of nasal patency is reasonable from the viewpoint of aerodynamic comparison of the nasal cavities, understandable by practitioners and accurate for clinical as well as experimental studies. Less