Biopsy Needle with Integrated Guide Pin
First Claim
1. A biopsy needle assembly for use in a biopsy gun, comprising:
- a hollow outer needle having a proximal end and a distal end and defining a lumen therethrough, said outer needle defining an axis along its length;
an inner needle slidably disposed within said lumen, said inner needle having a proximal end and a distal end and defining a cavity adjacent said distal end for receiving a tissue sample;
a first hub attached to said proximal end of said inner needle along said axis;
a second hub attached to said proximal end of said outer needle along said axis;
one of said first and second hubs including;
a first elongated track defining a first channel parallel to said axis and a stop surface at one end of said track; and
a projection spaced apart from said stop surface to define a space therebetween, said space having a length; and
an elongated pin having a first end, a second end and an arm projecting from said second end, said arm having a cross sectional dimension slightly less than said length, said pin slidingly disposed within said first channel of said one of said first and second hubs, and said first end of said pin connected to the other of said first and second hubs to move therewith, said one of said first and second hubs and said pin being slidable relative to each other between a position in which said arm is positioned in said space and a position in which said arm is outside said space.
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Accused Products
Abstract
A biopsy needle assembly for use in a biopsy gun includes coaxially slidably engaged outer needle and inner needles. The inner needle defines a cavity adjacent its distal end for receiving a tissue sample. A first hub is attached to the proximal end of the inner needle, and a second hub is attached to the proximal end of the outer needle. An elongated pin having a first end and a second end is fixedly attached to the first hub at the first end of the pin. The second end is in sliding contact with the second hub so that the second hub and the pin are slidable relative to each other. A stop engagement is provided between the second end of the pin and the second hub and is configured to prevent disengagement of the outer and inner needles and to maintain a specific physical relationship between the hubs.
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Citations
16 Claims
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1. A biopsy needle assembly for use in a biopsy gun, comprising:
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a hollow outer needle having a proximal end and a distal end and defining a lumen therethrough, said outer needle defining an axis along its length; an inner needle slidably disposed within said lumen, said inner needle having a proximal end and a distal end and defining a cavity adjacent said distal end for receiving a tissue sample; a first hub attached to said proximal end of said inner needle along said axis; a second hub attached to said proximal end of said outer needle along said axis; one of said first and second hubs including; a first elongated track defining a first channel parallel to said axis and a stop surface at one end of said track; and a projection spaced apart from said stop surface to define a space therebetween, said space having a length; and an elongated pin having a first end, a second end and an arm projecting from said second end, said arm having a cross sectional dimension slightly less than said length, said pin slidingly disposed within said first channel of said one of said first and second hubs, and said first end of said pin connected to the other of said first and second hubs to move therewith, said one of said first and second hubs and said pin being slidable relative to each other between a position in which said arm is positioned in said space and a position in which said arm is outside said space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification