Vitrectomy surgical apparatus with cut timing based on pressures encountered
AssigneeJohnson & Johnson Surgical Vision, Inc.
InventorsFred C. Lee, James B. Gerg, Kyle E. Lynn, Zheng Zhang, Lauren M. Hickey
Life of this patent
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Abstract
A vitrectomy apparatus is provided, including a pressure source, a cut valve connected to the pressure source, the cut valve configured to be turned on and off to provide pressure to selectively extend and retract a vitrectomy cutting device, a sensor configured to sense pressure provided from the cut valve, and a controller configured to control operation of the cut valve based on pressure sensed by the sensor. The controller is configured to monitor pressures encountered and alter cut valve timing based on pressure conditions previously encountered.
Claims8
A vitrectomy apparatus, comprising:
- a pressure source;
- a cut valve connected to the pressure source, the cut valve configured to be turned on and off to provide pressure to selectively extend and retract a vitrectomy cutting device;
- a sensor configured to sense pressure provided from the cut valve;
- and
- a controller configured to control operation of the cut valve based on pressure sensed by the sensor;
- wherein the cut valve is pneumatically connected to the sensor and electronically connected to the controller, wherein the controller is configured to monitor pressures encountered and alter cut valve timing based on pressure conditions previously encountered, and the controller is configured to monitor and maintain a peak pressure value and trough pressure value encountered, wherein peak pressure encountered represents a maximum pressure encountered and trough pressure comprises a minimum pressure encountered, wherein the peak pressure value is updated with a most recently encountered peak pressure value if the most recently encountered peak pressure value is greater than the peak pressure value, and the trough pressure value is updated with a most recently encountered trough pressure value if the most recently encountered trough pressure value is less than the trough pressure value.
A vitrectomy apparatus, comprising:
- a pressure source;
- a cut valve connected to the pressure source, the cut valve configured to be turned on and off to provide pressure to selectively extend and retract a vitrectomy cutting device;
- a sensor configured to sense pressure provided from the cut valve;
- and
- a controller configured to control operation of the cut valve based on pressure sensed by the sensor;
- wherein the cut valve is pneumatically connected to the sensor and electronically connected to the controller, wherein the controller is configured to monitor pressures encountered and alter cut valve timing based on pressure conditions previously encountered, and the controller is configured to monitor and maintain a peak pressure value and trough pressure value encountered, wherein peak pressure encountered represents a maximum pressure encountered and trough pressure comprises a minimum pressure encountered, wherein the controller is further configured to monitor and measure a time between sending a command to the cut valve and acquisition of at least one of the peak pressure value and the trough pressure value.
Dependencies are inferred from the claim text.