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Vitrectomy probe with adjustable cutter port size

  • US 8,845,666 B2
  • Filed: 08/26/2011
  • Issued: 09/30/2014
  • Est. Priority Date: 12/21/2010
  • Status: Active Grant
First Claim
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1. A vitrectomy probe comprising:

  • a housing;

    a cutter extending longitudinally from a first end of the housing, the cutter comprising;

    an outer cutting member coupled to the housing;

    an inner cutting member slideable within the outer cutting member, the inner cutting member 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 inner cutting member;

    a stroke limiter operable to limit the size of the adjustable port, the stroke limiter comprising;

    a moveable member threadably retained within the housing and rotatable about a first axis, the moveable member moveable in a first longitudinal direction in response to a rotation in a first rotational direction and the moveable member moveable in a second longitudinal direction opposite the first longitudinal direction in response to a rotation in a second rotation direction, a location where the moveable member contacts the inner cutting member defining the fully retracted position; and

    a rotatable member operably engaged with the moveable member and rotatable about a second axis different from the first axis, a rotation of the rotatable member operable to impart rotation to the moveable member.

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