Rapid detection techniques and methods of blood coagulation have attracted wide attention in academia and the business community in the presence of the increased demands for rapid assessment (point-of-care testing) of patients from surgery, intensive care unit, and other departments. The differential equation of vibration system composed of elastic support and electromagnetic induction devices was set up using the principle of damping vibration and establishing the dynamics model; meanwhile, the harmonic response analysis and vibration fatigue coupling analysis were carried out, the analysis results were optimized, and the experimental device of the electromagnetic induction testing sensor was established. In addition, the experimental device with blood coagulation reagent was assorted to establish the standard point-of-care testing rapid blood coagulation detection curve, and to compare the testing curve with that of the imported point-of-care testing blood coagulation instrument. The results showed that the first-order natural frequency of the designed sensor was 102.35 Hz, the correlation between the designed sensor and the imported equipment was 0.996, and the testing repeatability of the designed sensor could reach 0.002. Therefore, the designed blood coagulation testing sensor based on electromagnetic induction had the characteristics of favorable elasticity and anti-fatigue, which could meet the accuracy requirements of clinical detection. Taken together, this study could provide the core technology for developing the point-of-care testing instrument for blood coagulation dynamic testing.
Keywords: Sensor; blood coagulation dynamic testing; dynamics modeling; elastic support; electromagnetic vibration.