The invention discloses a pulsating flow blood injury assessment
system and method for a double-loop nested low-pre-charge medical instrument, and belongs to the technical field of
medical instruments. The
system comprises a physiological pulsating pressure
simulation loop and an instrument test blood carrying loop. The physiological pulsating pressure
simulation loop is composed of a mechanical
human body circulation
simulation system and comprises a left
ventricle, an
aorta compliance cavity, a pipeline, a sensor and a power system. The instrument test blood carrying loop comprises a flexible blood bag, a blood carrying pipeline and a to-be-tested medical instrument. The two loops are nested and coupled through the flexible blood bag, and the flexible blood bag is immersed in water-
glycerol liquid of the physiological pulsating pressure simulation loop to realize non-
contact pressure transmission. The
total blood pre-filling amount of the system is smaller than 500 mL, an SEBS blood bag and a heparinization
coating are adopted, a non-
contact sensor and an
actuator are combined, and extra blood damage is remarkably reduced. According to the invention, low-pre-charge and high-
biocompatibility pulsating flow blood injury accurate evaluation is realized, and the method is suitable for
blood compatibility test of
medical instruments such as a
ventricular assist device and the like.