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作者介绍了一种可在活体内测量动脉瞬时内径的传感器,瞬时内径与微型变压器的次级线圈的感生电压有关。对传感器进行了详细描述,并对其性能作了评价。能探测到0.005毫米的动脉内径变化,结果发现,对于直径约为7毫米的动脉,作用于动脉壁上最大力是4.5×10牛顿,所引起的畸变误差小于0.3%,活体测量在6～8毫米范围内径误差约为2%。传感器有一有限线性范围,四种不同型号的传感器所测量的范围是3.5～10毫米,此传感器成功地用于定量研究注射对照介质(狗中)的影响。一、引言许多研究者已研制出测量动脉直径的一些复杂的传感器和系统(Pieper&Paul,1968;Kolin,1977;Bertram,1977;
The authors describe a sensor that measures the instantaneous internal diameter of an artery in vivo and the instantaneous internal diameter is related to the induced voltage of the secondary winding of the micro-transformer. The sensor is described in detail and its performance is evaluated. The change in arterial diameter of 0.005 mm was detected. As a result, it was found that the maximum force acting on the arterial wall was 4.5 10 N for an artery of about 7 mm in diameter, causing a distortion error of less than 0.3% and a living body measurement of 6-8 The diameter error within the millimeter range is about 2%. The sensor has a finite linear range. The four different types of sensors measure 3.5 to 10 mm. This sensor was successfully used to quantitatively study the effect of injecting a control medium (dog). I. INTRODUCTION Many researchers have developed some complex sensors and systems for measuring arterial diameter (Pieper & Paul, 1968; Kolin, 1977; Bertram, 1977;