VITRECTOMY PROBE WITH ADJUSTABLE CUTTER PORT SIZE
First Claim
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1. A control system for operating a vitrectomy probe and controlling a port size of the vitrectomy probe comprising:
- a first isolation valve;
a first output port coupled to the first isolation valve, the first output port operable to communicate pneumatic pressure from the first isolation valve to the vitrectomy probe;
a second isolation valve;
a second output port coupled to the second isolation valve, the second output port operable to communicate pneumatic pressure from the second isolation valve to the vitrectomy probe;
a controller operable to;
oscillate the first isolation valve between a first position in which pneumatic pressure from the first output port is vented to the atmosphere and a second position in which pneumatic pressure is conducted to the first output port; and
oscillate the second isolation valve between a first position in which pneumatic pressure from the second output port is vented to the atmosphere and a second position in which pneumatic pressure is conducted to the second output port, movement of the first isolation valve from the first position to the second position synchronized with movement of the second isolation valve from the second position to the first position to define the port size of the vitrectomy probe.
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Abstract
Vitrectomy probes and system related thereto are disclosed herein. The disclosure describes various example vitrectomy probes having an adjustable cutting port size. Various example features are described for adjusting the size of the cutting port. Further, the disclosure provides examples for adjusting the size of the cutter port while the vitrectomy probe is in operation.
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Citations
16 Claims
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1. A control system for operating a vitrectomy probe and controlling a port size of the vitrectomy probe comprising:
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a first isolation valve; a first output port coupled to the first isolation valve, the first output port operable to communicate pneumatic pressure from the first isolation valve to the vitrectomy probe; a second isolation valve; a second output port coupled to the second isolation valve, the second output port operable to communicate pneumatic pressure from the second isolation valve to the vitrectomy probe; a controller operable to; oscillate the first isolation valve between a first position in which pneumatic pressure from the first output port is vented to the atmosphere and a second position in which pneumatic pressure is conducted to the first output port; and oscillate the second isolation valve between a first position in which pneumatic pressure from the second output port is vented to the atmosphere and a second position in which pneumatic pressure is conducted to the second output port, movement of the first isolation valve from the first position to the second position synchronized with movement of the second isolation valve from the second position to the first position to define the port size of the vitrectomy probe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for performing a vitrectomy comprising:
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a vitrectomy probe comprising; a first inlet port operable to conduct pneumatic pressure to an oscillator; a second inlet port operable to conduct pneumatic pressure to the oscillator; and a cutter comprising a first portion and a second portion, the oscillator operable to reciprocate the first portion relative to the second portion, an amount of movement of the first portion relative to the second portion defining a port size of the cutter; a control system comprising; a first isolation valve; a first output port coupled to first inlet port of the vitrectomy probe, the first output port operable to provide communication between the first inlet port and the first isolation valve; a second isolation valve; a second output port coupled to the second inlet port of the vitrectomy probe, the second output port operable to provide communication between the second inlet port and the second isolation valve; a controller operable to; oscillate the first isolation valve between a first position in which pneumatic pressure from the first inlet port of the vitrectomy probe is vented to the atmosphere and a second position in which pneumatic pressure is conducted to the first inlet port of the vitrectomy probe; and oscillate the second isolation valve between a first position in which pneumatic pressure from the second inlet port of the vitrectomy probe is vented to the atmosphere and a second position in which pneumatic pressure is conducted to the second inlet port of the vitrectomy probe, movement of the first isolation valve from the first position to the second position synchronized with movement of the second isolation valve from the second position to the first position to define the port size of the vitrectomy probe. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification