914 硬さ測定用カテーテルに関する基礎的研究

概要

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This paper describes the development of a catheter sensor for measurement of stiffness of the blood vessel wall. The basic sensor is constructed with a piezoelectric transducer (PZT), which acts as the tactile sensor and employs the phase shift principle. Two type of catheter sensor were developed. One type was built with a contact tip angle at 45 degrees in order to emit ultrasonic waves directly to the inside wall. The objective of the construction of the other type was to miniaturize its outside diameter as much as possible. Different concentrations of silicone gum and rubber models of blood vessels were used for measurements. Result show that the sensors could distinguish between silicone gum samples of different levels of hardness and determine the hardness/softness of neoplasm in blood vessel model. Thus, the catheter sensor developed here may prove very useful for inner measurements of blood vessels and may also be useful in detecting intraluminal obstruction due to tumor presence.
一般社団法人日本機械学会の論文
2003-09-05