Generating artificial pulse
AssigneeTc1 LLC
InventorKevin Bourque
Life of this patent
Estimating the term…
Abstract
In order to produce a pulsatile blood flow pattern that includes time periods of relatively high blood flow rates and time periods of relatively low blood flow rates, the operating speed of a blood pump can be selectively controlled to produce an operating speed pattern that includes time periods of relatively high rotation speeds and periods of relatively low rotation speeds. For example, the blood pump is rotated at a first speed for a first period of time. The speed of the blood pump is then decreased from the first speed to a second speed and is operated at the second speed for a second amount of time. The speed of the blood pump is then decreased to a third speed for a third amount of time. If desired, the operating speed pattern can be repeated to continue the pulsatile blood flow pattern.
Claims25
A method for pumping blood, comprising:
- operating a blood pump at a first speed for a first period of time;
- reducing a speed of the blood pump from the first speed to a second speed;
- returning the speed of the blood pump from the second speed to the first speed by overshooting the first speed to a greater speed before returning to the first speed.
A blood pump controller, comprising:
- a waveform generator to generate a waveform for operating a blood pump;
- and
- a drive waveform transmitter to supply the generated waveform to the blood pump,
- wherein the generated waveform is configured to:
- operate the blood pump at a first speed for a first period of time;
- reduce the speed of the blood pump from the first speed to a second speed;
- and
- return the speed of the blood pump from the second speed to the first speed by overshooting the first speed to a greater speed before returning to the first speed.
A non-transitory machine-readable storage medium encoded with instructions that, when executed by data processing apparatus, cause the data processing apparatus to perform operations comprising:
- operating a blood pump at a first speed for a first period of time;
- reducing the speed of the blood pump from the first speed to a second speed;
- returning the speed of the blood pump from the second speed to the first speed by overshooting the first speed to a greater speed before returning to the first speed.
Dependencies are inferred from the claim text.