An electric device for instantaneous and continuous computation of aortic blood velocity.

acceleration, a is the coefficient of friction, and u is the blood velocity. The boundary condition for u is that it must return to and remain at zero at the end of diastole. The value of a which will satisfy this condition is the proper value. It can be demonstrated that a must lie somewhere between 0 and 2A.-C. The proper value may be obtained by a tedious graphic method. However, analog computer technics are available which permit the adjustment of a to satisfy the boundary condition for u and which will then solve equation (1) for u continuously. An equation analogous to equation (1) is