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US 10,881,549 B2Granted
Vitrectomy surgical apparatus
AssigneeJohnson & Johnson Surgical Vision, Inc.
InventorsFred C. Lee, James B. Gerg, Zheng Zhang, Kyle E. Lynn, Lauren M. Hickey
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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.
Claims6
A method for performing a vitrectomy procedure, comprising:
- sensing pressure provided from a pressure source through a cut valve and to a vitrectomy handpiece;
- receiving an input of a desired amount of material to be processed;
- calculating an amount of material processed based on the sensed pressure, an aspiration rate of the vitrectomy handpiece, and an amount of time elapsed while the sensed pressure is between an opening pressure threshold and a closing pressure threshold and a dwell time;
- and
- controlling operation of the cut valve based on a comparison of the desired amount of material to be processed and the amount of material processed.
2 more elements
Dependencies are inferred from the claim text.