透析患者的桡动脉脉搏波信息系统设计

Wave Information System Design of Radial Artery Pulse in the Hemodialyst

透析治疗过程中患者的血压和脉搏可能会出现较大的变化,低血压和心率过快都会给患者带来危险。根据透析室工作环境的特点设计了凌阳SPCE061A和51单片机无线脉搏采集以及上下位机通信系统,在上位机实现了患者脉搏波形的实时显示和数据库存储,同时编写了C++Builder调用Matlab的接口程序,实现了频域滤波和小波降噪,能够从脉搏波中提取脉搏的周期、特征值K、最大峰值和最大峰值处的频率,可以有效的判断透析过程中心的率过快,诊断透析患者的血管硬化程度,能够提高透析过程中的安全性,进而减轻透析室的医生和护士工作负担。

In the process of hemodialysis, the patients＇ blood pressure and pulse wave are likely to change considera- bly so that hypotension and rapid heart rate may be dangerous to the hemodialysts＇ life. Based on the environment of hemodialysis room, we designed the communication system using SPCE061A single-chip computer and STC89C52 single-chip computer to realize wireless communication between upper system and the two single-chip computers, and on the upper computer the pulse wave can display at real-time and save data on the data base. At the same time we designed an interface program to reduce noise by way of frequency domain analysis and wavelet denoising. It can draw the cycle pulse wave, eigenvalue-K, the maximum peak and peak frequency, it can effectively judge a racing heart in the hemodialysis and can also evaluate vascular sclerosis of hemodialysis. In short, the system is able to im- prove treatment security and reduce the burden of the doctors and nurses in hemodialysis rooms.