Localization needle assembly
First Claim
1. A localization needle assembly for pinpointing lesions within body tissue, including in combination:
- an outer tubular cannula member having a distal end and a proximal end with said cannula member having an opening predeterminedly lcoated from said distal end,an elongated inner needle member having a distal end portion and a proximal end portion, said inner needle member having a pointed tip and anchoring means at its distal end portion, said inner needle member being slidably mounted for movement within said outer cannula member between an extended position and a retracted position, andsaid anchoring means having a mounting portion secured to said distal end portion of said inner needle member and a barb portion contained within said outer cannula member and extending towards said opening in said outer cannula member when said inner needle member is in its extended position and said barb portion moved outward of said outer cannula member through said opening predeterminedly located from the distal end of said outer cannula member to engage body tissue when said inner needle member is moved to its retracted position to lock the needle assembly within the body tissue.
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Accused Products
Abstract
A localization needle assembly includes an outer tubular cannula and an inner needle slidably mounted for movement within the outer cannula between extended and retracted portions, the needle having a pointed tip which projects from the front end of the assembly when the needle is extended while the surgeon locates a lesion. When the tip is retracted, a barb, which is secured to the needle, is deployed through an opening in the sidewall of the outer cannula when the needle is retracted, the barb anchoring the needle assembly in body tissue in the proximity of the lesion. Detachable handles are provided for locking the inner needle and outer cannula together and to facilitate extension and retraction of the needle. In one embodiment, the outer cannula has a helical screw tip for securing the needle assembly to a body organ or body tissue. A guide assembly is advanced along the needle assembly which has been inserted into the body tissue to locate a lesion to position one end of a guide wire at the lesion to facilitate the introduction of a surgical instrument into the body and guidance of same directly to the lesion.
420 Citations
13 Claims
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1. A localization needle assembly for pinpointing lesions within body tissue, including in combination:
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an outer tubular cannula member having a distal end and a proximal end with said cannula member having an opening predeterminedly lcoated from said distal end, an elongated inner needle member having a distal end portion and a proximal end portion, said inner needle member having a pointed tip and anchoring means at its distal end portion, said inner needle member being slidably mounted for movement within said outer cannula member between an extended position and a retracted position, and said anchoring means having a mounting portion secured to said distal end portion of said inner needle member and a barb portion contained within said outer cannula member and extending towards said opening in said outer cannula member when said inner needle member is in its extended position and said barb portion moved outward of said outer cannula member through said opening predeterminedly located from the distal end of said outer cannula member to engage body tissue when said inner needle member is moved to its retracted position to lock the needle assembly within the body tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A localization needle assembly for locating lesions within body tissue, including in combination:
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an outer tubular cannula member having a distal end and a proximal end with said cannula member having an opening predeterminedly located from said distal end, an elongated inner needle member slidably mounted within said outer cannula member and having a distal end portion and a proximal end portion, with said inner needle member having a cutaway portion spaced inwardly of said distal end portion, with said inner needle member being slidably mounted for movement within said outer cannula member between an extended position and a retracted position, and projections means fixedly mounted to said distal end portion of said inner needle member, said projection means having a forward projection means extending beyond said distal end portion of said inner needle member and a barb portion adapted to be received within said cutaway portion of said inner needle member when said inner needle member is in an extended position and wherein said barb portion is slidably moved outward through said opening predeterminately located from the distal end of said outer cannula member to engage the body tissue when said inner needle member is moved to its retracted position to lock the needle assembly within the body tissue.
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Specification