Vitrectomy probe with adjustable cutter port size
First Claim
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1. A vitrectomy probe comprising:
- a housing;
a cutter extending from a first end of the housing along a longitudinal axis, the cutter comprising;
an outer cutting member coupled to the housing;
an opening formed in the outer cutting member, the opening comprising a distal edge and a proximal edge;
an interior assembly comprising an inner cutting member slideable within the outer cutting member, the interior assembly slideable between a retracted position and an extended position and comprising a first contact surface; and
an adjustable port, a size of the adjustable port defined by the distal edge of the opening and an end surface of the inner cutting member when the inner cutting member is in a fully retracted position, the end surface of the inner cutting member being disposed between the distal edge of the opening and the proximal edge of the opening when the inner cutting member is in the fully retracted position;
an oscillator operable to reciprocate the interior assembly;
a stroke limiter disposed within the housing, the stroke limiter comprising a second contact surface; and
a motor operably coupled to the stroke limiter, a position of the stroke limiter relative to the interior assembly being alterable to a plurality of selectable positions in response to a rotation of the motor,wherein the first contact surface of the interior assembly contacts the second contact surface of the stroke limiter at a selected position of the plurality of selectable positions to stop motion of the interior assembly and to define the fully retracted position of the inner cutting member.
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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
12 Claims
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1. A vitrectomy probe comprising:
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a housing; a cutter extending from a first end of the housing along a longitudinal axis, the cutter comprising; an outer cutting member coupled to the housing; an opening formed in the outer cutting member, the opening comprising a distal edge and a proximal edge; an interior assembly comprising an inner cutting member slideable within the outer cutting member, the interior assembly slideable between a retracted position and an extended position and comprising a first contact surface; and an adjustable port, a size of the adjustable port defined by the distal edge of the opening and an end surface of the inner cutting member when the inner cutting member is in a fully retracted position, the end surface of the inner cutting member being disposed between the distal edge of the opening and the proximal edge of the opening when the inner cutting member is in the fully retracted position; an oscillator operable to reciprocate the interior assembly; a stroke limiter disposed within the housing, the stroke limiter comprising a second contact surface; and a motor operably coupled to the stroke limiter, a position of the stroke limiter relative to the interior assembly being alterable to a plurality of selectable positions in response to a rotation of the motor, wherein the first contact surface of the interior assembly contacts the second contact surface of the stroke limiter at a selected position of the plurality of selectable positions to stop motion of the interior assembly and to define the fully retracted position of the inner cutting member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vitrectomy probe comprising:
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a housing defining an outermost surface of the vitrectomy probe; a cutter extending from a first end of the housing along a longitudinal axis, the cutter comprising; an outer cutting member attached to a distal end of the housing; an interior assembly comprising an inner cutting member slideable within the outer cutting member, the interior assembly slideable between a retracted position and an extended position; and an adjustable port, a size of the adjustable port defined by an edge of an opening formed in the outer cutting member and an end surface of the inner cutting member when the inner cutting member is in a fully retracted position; an oscillator operable to reciprocate the interior assembly; a stroke limiter disposed within the housing and operable to limit the size of the adjustable port; and a motor operably coupled to the stroke limiter and operable to displace the stroke limiter along the longitudinal axis relative to the interior assembly, wherein the stroke limiter comprises a first threaded exterior surface, wherein a portion of the housing comprises a second threaded surface, wherein the first threaded surface matingly engages the second threaded surface. - View Dependent Claims (10, 11, 12)
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Specification