ABSTRACT
In order to quantitatively evaluate the performance of dry electrode for fabric surface bioelectricity, a set of active measuring devices that can simulate electrocardiosignal has been developed on the basis of passive system by our group. Five Ag/AgCl fabric dry electrodes were selected to test and evaluate the devices. The results show that the deviation ratios of peak time interval of the five electrodes are all less than 1%. The maximum voltage amplitude decay rate is 7.2%, and the noise amplitudes are lower than 0.004 mV. The variable coefficient of peak time offset is less than 8%. The variable coefficient of voltage amplitude is less than 2%. The variable coefficient of noise amplitude is less than 10%. Research shows the devices has good repeatability and stability in measuring the simulated electrocardiosignal. The active measuring devices proposed in this paper can provide a new method for performance evaluation and standard formulation of surface bioelectricity dry electrode.
Subject(s)
Electrodes , Textiles , Wearable Electronic DevicesABSTRACT
Transjugular intrahepatic portosystemic shunt (TIPS), after nearly 30 years of continuous exploration and development, has been widely used in the treatment of complications of portal hypertension. TIPS has significant advantages in acute esophagogastric variceal bleeding, prevention of rebleeding, refractory peritoneal effusion, and Budd-Chiari syndrome; however, if postoperative anticoagulant measures are inappropriate, it can cause several complications, such as stent dysfunction and acute thrombosis, and lead to the recurrence of the symptoms of portal hypertension before TIPS, which greatly affects middle- and long-term clinical outcomes and survival rate. Maintenance of stent patency is the key to good postoperative treatment outcome, and therefore, anticoagulants play an important role in the prevention and treatment of post-TIPS thrombosis. At present, no consensus has been reached on post-TIPS anticoagulant therapy in China and foreign countries. This article reviews the research advances in the application of anticoagulants after TIPS.