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06/21/07 | 38 views | #20070142923 | Prev - Next | USPTO Class 623 | About this Page  623 rss/xml feed  monitor keywords

Control systems for rotary blood pumps

USPTO Application #: 20070142923
Title: Control systems for rotary blood pumps
Abstract: The present invention generally relates to a control system for a rotary blood pump adapted to move blood in a patient. The control system comprises a means for measuring and varying the speed of the pump and a means for measuring the pulsatility index of a patient, and the control system is adapted to maintain the pulsatility index at or near a predetermined value by varying the speed of the pump. The pulsatility index is derived from the amplitude of the actual pump speed over a predetermined time period. Optionally, also, the control system can calculate the second derivative of instantaneous speed of the rotary blood pump and use the calculation of the second derivative of instantaneous speed to detect a suction event, and help prevent it. (end of abstract)
USPTO Applicaton #: 20070142923 - Class: 623031000 (USPTO)
Related Patent Categories: Prosthesis (i.e., Artificial Body Members), Parts Thereof, Or Aids And Accessories Therefor, Leg, Torso Attachment

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Prosthesis (i.e., artificial body members), parts thereof, or aids and accessories therefor

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