Injectors, injector systems and injector control
OwnerRichard G. Critchlow, Martin J. Uram +3inventors
InventorsRichard G. Critchlow, Martin J. Uram, David A. Mishler, Richard A. Bates, Robert J. Doiron
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Abstract
An injector for use in injecting a fluid in a medical injection procedure includes a drive having a motor to pressurize the fluid; a sensor to provide a measure of fluid pressure; and a pressure monitor in communication with the sensor and the drive to stop the motor using 4-quadrant control when the sensor communicates a measured pressure of at least a pressure hazard limit. The pressure monitor also limits power input to the motor to a power limit once the sensor communicates a measured pressure of at least a power limiting pressure. The power limiting pressure is below the pressure hazard limit.
Claims6
An injector system comprising:
- a syringe comprising a plunger movably disposed therein and containing a fluid;
- a drive operably connected to the plunger of the syringe, the drive including a motor operable to pressurize the fluid;
- a sensor to provide a measure of fluid pressure;
- and
- a pressure monitor in communication with the sensor and the drive to stop the motor using 4-quadrant control when the sensor communicates a measured pressure of at least a pressure hazard limit, the pressure monitor also limiting power input to the motor to a power limit once the sensor communicates a measured pressure of at least a power limiting pressure, the power limiting pressure being below the pressure hazard limit.
Dependencies are inferred from the claim text.