Vitrectomy surgical apparatus employing multisensor pressure feedback
AssigneeAbbott Medical Optics Inc.
InventorsAbraham Hajishah, Mitchell W Mallough
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 plurality of sensors provided at a plurality of points between the pressure source and the vitrectomy handpiece, and a controller configured to employ a function correlating a desired cut rate with a pressure source duty cycle and employ a different function when one sensor of the plurality of sensors senses a pressure outside a predetermined pressure range.
Claims19
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 plurality of sensors provided at a plurality of points between the pressure source and a vitrectomy handpiece;
- and
- a controller configured to selectively provide commands to change pressure source duty cycle according to a function selected from a plurality of functions when one sensor of the plurality of sensors measures a pressure outside a predetermined pressure range.
A method for controlling a vitrectomy system, comprising:
- sensing pressure provided from a pressure source through a cut valve and to a vitrectomy handpiece using a plurality of sensors positioned between the pressure source and the vitrectomy handpiece;
- and
- controlling pressure delivered to the cut valve based on pressure measured by selecting a function when measured pressure from one of the plurality of sensors is outside a predetermined pressure range.
A vitrectomy apparatus, comprising:
- a vitrectomy handpiece comprising a vitrectomy cutting device;
- a sensing arrangement comprising a plurality of sensors configured to sense pressure;
- tubing connecting the vitrectomy handpiece to the sensing arrangement;
- a cut valve connected to the sensing arrangement;
- a pressure source configured to provide pressure to the cut valve;
- and
- a controller configured to receive data from the sensing arrangement and selectively provide commands to change pressure source duty cycle according to a plurality of functions according to data received from the sensing arrangement.
Dependencies are inferred from the claim text.