Retroperfusion control apparatus, system and method
First Claim
1. In a control apparatus for supplying arterial blood of a patient to the venous side of the patient'"'"'s heart, a pump having an inlet adapted to be coupled to an artery of the patient and an outlet, a catheter coupled to the outlet and adapted to be connected to a vein of the patient, the catheter having an inflatable balloon mounted thereon, movable means forming a part of the pump movable through a pump stroke for moving a liquid from the inlet to the outlet of the pump, a stepper motor, means coupling the stepper motor to the movable means, and electronic circuitry for driving the stepper motor, the electronic circuitry including means for sensing the presence of an R wave in an electrocardiogram of a patient and for operating the stepper motor in response to the sensed R wave.
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Accused Products
Abstract
Retroperfusion control apparatus for supplying arterial blood of a patient to the venous side of the patient'"'"'s heart including a pump having an inlet and an outlet and a piston movable through a pump stroke for moving a liquid from the inlet to the outlet of the pump. A stepper motor is provided which drives the piston. Electronic circuitry is provided for driving the stepper motor and senses the presence of an R wave in a patient to operate the stepper motor in response to the sensed R wave.
143 Citations
29 Claims
- 1. In a control apparatus for supplying arterial blood of a patient to the venous side of the patient'"'"'s heart, a pump having an inlet adapted to be coupled to an artery of the patient and an outlet, a catheter coupled to the outlet and adapted to be connected to a vein of the patient, the catheter having an inflatable balloon mounted thereon, movable means forming a part of the pump movable through a pump stroke for moving a liquid from the inlet to the outlet of the pump, a stepper motor, means coupling the stepper motor to the movable means, and electronic circuitry for driving the stepper motor, the electronic circuitry including means for sensing the presence of an R wave in an electrocardiogram of a patient and for operating the stepper motor in response to the sensed R wave.
- 19. A method for supplying arterial blood into a venous region of the heart, comprising taking an electrocardiogram of the patient, ascertaining when an R wave is present in the electrocardiogram, supplying arterial blood from the patient under positive pressure into a venous region of the heart for a predetermined period of time in accordance with the R wave of the patient, providing a pause period for a predetermined period of time to permit any positive pressure created to be dissipated and to permit continued flow to occur and thereafter allowing antegrade flow of venous blood from the heart for a predetermined period of time in accordance with the R wave of the patient.
Specification