Safety device for sampling tissue
First Claim
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1. An apparatus for sampling tissue comprising:
- a tissue engaging member disposed at a distal end of the apparatus, the tissue engaging member being operative to engage and retain a sample of a tissue structure;
a cutter disposed surrounding the tissue engaging member, wherein the tissue engaging member and cutter are both operative to translate longitudinally with respect to one another; and
a latch operative to hold the cutter distally, the latch operative to engage only when the tissue engaging member is in a predetermined range of positions.
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Abstract
An apparatus for sampling tissue includes a tissue engaging member for engaging and retaining a sample of a tissue structure, and a cutter surrounding the tissue engaging member. The tissue engaging member and cutter are both operative to translate longitudinally with respect to one another, and a mechanism prevents the cutter from moving distally, the mechanism being released and the cutter freed to move distally when the tissue engaging member is in a predetermined position, preferably distal of the cutter. Thereby, out of sequence operation, e.g., premature cutting of the tissue before the tissue engaging member is in position, is prevented.
843 Citations
31 Claims
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1. An apparatus for sampling tissue comprising:
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a tissue engaging member disposed at a distal end of the apparatus, the tissue engaging member being operative to engage and retain a sample of a tissue structure;
a cutter disposed surrounding the tissue engaging member, wherein the tissue engaging member and cutter are both operative to translate longitudinally with respect to one another; and
a latch operative to hold the cutter distally, the latch operative to engage only when the tissue engaging member is in a predetermined range of positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14)
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11. The apparatus according to claim 11, wherein the means for holding the tissue engaging member at the predetermined position is released by a predetermined distal movement of the cutter.
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15. An apparatus for sampling tissue, the apparatus comprising:
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a body having a cutter at a first end; and
a tissue engaging member having its distal end positioned distally of the cutter, the tissue engaging member mounted to translate only distally of the cutter. - View Dependent Claims (16, 17, 18)
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19. An apparatus for sampling tissue comprising:
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a tissue engaging member disposed at a first end of the apparatus and biased to move proximally of the first end, the tissue engaging member being operative to engage and retain a sample of a tissue structure; and
a cutter disposed surrounding the tissue engaging member and biased to move proximally of the first end, wherein the tissue engaging member and cutter are both operative to translate longitudinally with respect to one another;
wherein distal movement of the tissue engaging member to a first predetermined position permits the cutter to move to a second predetermined position proximal of the tissue engaging member. - View Dependent Claims (20, 21, 22, 23)
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24. An apparatus for sampling tissue, comprising:
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a body;
a cutter mounted for translation with respect to the body;
a retention member mounted for translation with respect to the body; and
a first portion linked to the retention member for translating the retention member from a non-deployed position to a deployed position;
a second portion linked to the cutter for translating the cutter from a non-deployed position to a deployed position;
a first latching mechanism responsive to distal translation of the first portion for latching the retention member; and
a second latching mechanism responsive to the distal translation of the first portion for latching the cutter. - View Dependent Claims (25, 26, 27, 28, 29, 31)
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30. An apparatus for sampling tissue, comprising:
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a body;
a cutter mounted for translation with respect to the body;
a retention member mounted for translation with respect to the body; and
at least one actuating mechanism, carried at least partly within the elongated body, for controlling movement of the cutter and the retention member;
wherein the at least one actuating mechanism prevents deployment of the cutter out of sequence before the retention member.
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Specification