Implementation of Signal Detection and Control of Bioartificial Liver Support System

Abstract

Liver failure is an extremely dangerous disease whose mortality rate is 73.9% and the rate of acute liver failure is as high as 87.8%. As the only effective way to treat liver failure, liver transportation is facing a serious shortage of donor. As an extracorporeal circulation device, artificial liver support system could effectively replace the patient's liver in a short period of time so as to improve the survival rate of patients greatly. At present, the control core of the artificial liver control system is PLC. However, with the increasing complexity of functions and demands, the control system based on PLC will gradually show some disadvantages in cost, safety, reliability, stability, real-time Performance and other aspects which will restrict the development of artificial liver. Aiming at the deficiencies in the existing control system, a bio-artificial embedded control system based on ARM and CPLD was designed and implemented in this study, completes the hardware design, PCB design and control program writing, and designs the safety control loop to improve the control system Reliability. The experimental results show that performance of the control system has been improved to a certain extent in terms of safety, reliability, stability and real-time performance. Meanwhile, the cost of control system is lower, which is conducive to the market promotion of artificial liver.