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Tissue-retrieving means for a surgical snare instrument
| Details |
Inventors: Magill, John W.; Wurster, Carl F.;
Assignee:
Primary Examiner: Mancene; Gene
Assistant Examiner: Weiss; John G.
Attorney, Agent or Firm: Gerlash & O'Brien
Tissue-retrieving means for a surgical instrument having a snare loop projecting outwardly from a distal end thereof for encircling projecting body tissue, and means for contracting the loop, thereby to sever the encircled tissue, which retrieving means includes tissue engaging means, manipulating means connected to the engaging means, means for mounting the manipulating means on the instrument for manipulating the engaging means to engage tissue encircled by the loop, and means for effecting manual adjustment of the position of the engaging means relative to the loop, rotationally about a longitudinally-extending axis, for engagement of the engaging means with a selected portion of encircled tissue extending from either side of the loop. In a preferred embodiment, the tissue-engaging means comprises means for impaling encircled tissue thereon, including a barb movable between a contracted position assumed during insertion into encircled tissue to engage the tissue, and an expanded position assumed upon removal of the tissue on the engaging means. |
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DETAILED DESCRIPTION Important objects of the present invention include the provision of tissue-retrieving means for a surgical open-snare instrument, which means will insure that severed tissue is removed from within the body, and will reduce the risk of inhaling or swallowing the tissue where such danger exists, which may be used in close quarters, which enables the surgeon to both sever the tissue and also, if desired, simultaneously to retrieve the severed tissue without assistance, and which is manipulatable for engagement with a selected portion of the tissue and at various locations relative to the snare loop.
The invention provides tissue-retrieving means for a surgical open-snare instrument having a snare loop projecting longitudinally outwardly from a distal end thereof for encircling projecting body tissue, and means for contracting the loop, thereby to sever the encircled tissue from the remainder of the body.
The retrieving means includes tissue-engaging means, manipulating means connected to the engaging means, means for mounting the manipulating means on the instrument for manipulation of the engaging means to engage tissue encircled by the loop, for removal of the tissue on the engaging means following severance of the tissue, and means for effecting manual adjustment of the position of the engaging means relative to the loop, rotationally about a longitudinally extending axis, for engagement of the engaging means with a selected portion of encircled tissue extending from either side of the loop.
In a preferred embodiment of the invention, the tissue-engaging means comprises means for impaling encircled tissue thereon, which includes a barb movable between a contracted position assumed during insertion into encircled tissue to engage the same, and an expanded position assumed upon removal of the tissue on the engaging means.
In another preferred embodiment of the invention, a finger-engageable handle is provided on the tissue-retrieving means, for facilitating the operation of the snare loop and of the tissue-engaging means with the same hand
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