Systems and methods for phacoemulsification with vacuum based pumps
First Claim
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1. An intraocular lens removal device comprising:
- a handpiece;
an aspiration line having a proximal end coupled to the handpiece and a distal end fluidly coupled to a holding tank;
a vacuum-based aspiration pump coupled to the holding tank, wherein the vacuum-based aspiration pump is selected from the group consisting of a venturi pump, a diaphragm pump, and a rotary-vane pump;
a vacuum level controller configured to control a vacuum level of the vacuum-based aspiration pump based on a selected vacuum level;
a pressure transducer coupled to the aspiration line between the handpiece and the holding tank;
a valve coupled to the aspiration line between the pressure transducer and the holding tank; and
a computer controller communicatively coupled to the valve and the pressure transducer, wherein a processor of the computer controller periodically closes the valve, retrieves a pressure reading from the pressure transducer while the valve is closed, and determines whether the aspiration line is occluded based on a comparison of the selected vacuum level and the retrieved pressure reading.
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Abstract
The invention is generally directed to systems and methods for ophthalmic surgery, and more particularly to systems and methods for phacoemulsification using vacuum-based aspiration pumps. In accordance with one embodiment, a vacuum-based phacoemulsification system, having a handpiece, includes a subsystem to detect an occlusion occurring at the handpiece during operation.
330 Citations
7 Claims
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1. An intraocular lens removal device comprising:
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a handpiece; an aspiration line having a proximal end coupled to the handpiece and a distal end fluidly coupled to a holding tank; a vacuum-based aspiration pump coupled to the holding tank, wherein the vacuum-based aspiration pump is selected from the group consisting of a venturi pump, a diaphragm pump, and a rotary-vane pump; a vacuum level controller configured to control a vacuum level of the vacuum-based aspiration pump based on a selected vacuum level; a pressure transducer coupled to the aspiration line between the handpiece and the holding tank; a valve coupled to the aspiration line between the pressure transducer and the holding tank; and a computer controller communicatively coupled to the valve and the pressure transducer, wherein a processor of the computer controller periodically closes the valve, retrieves a pressure reading from the pressure transducer while the valve is closed, and determines whether the aspiration line is occluded based on a comparison of the selected vacuum level and the retrieved pressure reading. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification