초록 ▼

A localization needle assembly includes an outer tubular cannula and a reinforced needle structure slidably mounted for movement within the outer cannula between extended and retracted portions, the needle structure defining a rearwardly extending barb which is contained within the outer cannula whe

A localization needle assembly includes an outer tubular cannula and a reinforced needle structure slidably mounted for movement within the outer cannula between extended and retracted portions, the needle structure defining a rearwardly extending barb which is contained within the outer cannula when the inner needle is extended while the surgeon locates a lesion. When the inner needle is retracted, the barb is deployed through an opening in the sidewall of the outer cannula for anchoring the localization needle assembly in body tissue in the proximity of the lesion.

대표청구항 ▼

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 located from said distal end, an elongated inner needle structure hav

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 located from said distal end, an elongated inner needle structure having a distal end and a proximal end, with a linear portion at its distal end and a flexible reinforced portion extending proximal from said linear portion towards its proximal end, said needle structure comprising an elongated wire core means and said flexible reinforced portion comprising multiple wire strands wound on said wire core means over a portion of its length, said reinforced potion terminating short of the distal end of said wire needle structure, defining said linear portion of said wire needle structure, said linear portion of said needle structure having anchoring means including an extendable and retractable barb, said inner needle structure being slidably mounted for movement within said outer cannula member between a first position and a second position, said barb being contained within said outer cannula member, extending towards said opening in said outer cannula member when said needle structure is in said first position and said barb being 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 needle structure is moved to said second position to anchor the localization needle assembly to body tissue.