论文部分内容阅读
一、无创血压测量原理无创血压测原理如图1所示。用袖带将病人肘部裹住,当按下充气键时,仪器内的微处理器则指示气泵对轴带充气,由一压阻传感器检测袖带内的充气压力,并将检测到的信号送回微处理器。当充气压力超过病人收缩压4kPa(30mmHg)左右时,一般约为24kPa(180mmHg),处理器则指示气泵停止充气。此时动脉血管受压闭塞,管内几乎无血流通过,压力传感器这时检测到的信号只是袖带压力。在袖带内的压力充到最大值后,便以1kPa(7mmHg)左右的压力幅度阶梯释放袖带内的压力,如图2所示。当
First, the principle of noninvasive blood pressure measurement Noninvasive blood pressure measurement principle shown in Figure 1. When the inflatable key is pressed, the microprocessor in the instrument instructs the air pump to inflate the shaft, a pressure sensor detects the inflation pressure in the cuff, and the detected signal Back to the microprocessor. When the inflation pressure exceeds the patient systolic pressure 4kPa (30mmHg) or so, usually about 24kPa (180mmHg), the processor instructs the pump to stop inflating. At this point arterial occlusion occlusion, almost no blood flow through the tube, the pressure sensor at this time the signal detected only cuff pressure. After the pressure in the cuff is charged to the maximum, the pressure in the cuff is relieved by a pressure amplitude step of about 1 kPa (7 mmHg), as shown in FIG. 2. when