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Vitrectomy probe with adjustable cutter port size

  • US 9,585,788 B2
  • Filed: 08/22/2012
  • Issued: 03/07/2017
  • Est. Priority Date: 12/20/2011
  • Status: Expired due to Fees
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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