Traction-limiting vitrecetomy probe
First Claim
Patent Images
1. A vitrectomy probe comprising:
- a body;
a cutter extending from the body, the cutter comprising;
an outer cutter portion; and
an inner cutter portion slideable within the outer cutter portion between an extended position and a retracted position;
a diaphragm coupled to the inner cutter portion and disposed within a chamber formed in the body and dividing the chamber into a first chamber portion and a second chamber portion, the diaphragm moveable in a first direction to retract the inner cutter portion in response to a first pneumatic pressure introduced into the first chamber portion; and
a first valve coupled to the inner cutter portion, at least a portion of the valve disposed in the first chamber portion and adapted to close upon introduction of the first pneumatic pressure into the first chamber portion.
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Accused Products
Abstract
Apparatuses, systems, and methods are described for selectively generating an aspiration flow within a surgical instrument. Particularly, the disclosure describes example vitrectomy probes operable to selectively generate an aspiration flow in relation to operation of the cutter of the vitrectomy probe. In some instances, one or more valves may be used to form a barrier or closure and create a piston effect in order to selectively generate an aspiration flow.
20 Citations
7 Claims
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1. A vitrectomy probe comprising:
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a body; a cutter extending from the body, the cutter comprising; an outer cutter portion; and an inner cutter portion slideable within the outer cutter portion between an extended position and a retracted position; a diaphragm coupled to the inner cutter portion and disposed within a chamber formed in the body and dividing the chamber into a first chamber portion and a second chamber portion, the diaphragm moveable in a first direction to retract the inner cutter portion in response to a first pneumatic pressure introduced into the first chamber portion; and a first valve coupled to the inner cutter portion, at least a portion of the valve disposed in the first chamber portion and adapted to close upon introduction of the first pneumatic pressure into the first chamber portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification