【摘要】 本文介绍了新近研制的数显便携式颈总动脉压迫器的工作原理、电路设计和调试结果。该仪器增强了患侧颈总动脉切术前施行压迫锻炼改善脑侧支循环的效果并为临床实时监测提供客观数据指标。更多还原

【Abstract】 Since 1979, many cases of paraganliomas in the neck have been successfully treated in Tianjin Cancer Hospital. All patients who would be subjected to this operation should undergo preoperative compressing exer cises of the carotid artery to promote better circulation of collateral cerebral crossflow. Therefore, a reliable and compact instrument is necessary for the compressing exercises of the carotid artery and the long-term ambulatory monitoring of the compressingeffect.This paper introduces our developed instrument, A djustable and digital Carotid compressor, which is based on the principleof .of..e-o.cillo..t.ic method. During the gradual change in cuff pressure, the amplitude of consecutive arterial volume pulsations associated with pulse pressure shows change characteristically due to the nonlinearity of arterial pressure-volume (P--V) relation. Arterial pressure can be determined by detecting this change in the amplitude, while the arterial volume change can be noninvasively obtained as a function of this transmural pressure, provided that the state of blood flow are determined during this pressure measurement.Considering the simplicity and practicability of this instrument I we have designed a new portable one which consists of pulsepresstlre transducer, signal amplifier, peak voltage locking circuit and liquid crystal displayer. The validity and accuracy of this instrument and a few examples of its clinical application are presented.更多还原