[Device for studying the kinematics of movement of closing elements in artificial heart valves]

A device designed for studying the motion kinematics of locking elements in the artificial cardiac valves is described. The principle of its operation is based on the photoelectric registration with subsequent electronic differentiation of the electric displacement signal. The length of measurable linear displacement is 0+20 mm. The amplitudinal-frequency characteristics of the differentiator is linear within the range of 0+120 Hz. The error of the displacement and speed error--not more than 5 per cent.