Localization device with anchoring barbs
First Claim
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1. A localization device (10) comprising:
- an outer needle cannula (11) having a distal end (20);
a plurality of anchoring wires (12) comprising a superelastic material, the anchoring wires further having distal portions (14) extending laterally outward while in the unstressed state to form barbs (15) capable of engaging tissue; and
a sleeve cannula (13) to constrain the distal portions of the anchoring wires into a substantially straight configuration, the sleeve cannula slidably disposed within the outer needle cannula, the distal portions of the anchoring wires extending beyond the distal end of the sleeve cannula and the distal end of the outer needle cannula in the deployed condition.
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Abstract
A localization device (10) comprising an outer needle cannula (11), an optional inner sleeve cannula (13) and an anchor stylet comprising a plurality of preformed superelastic alloy wires (12). Once the distal portions (14) of the wires (12) are deployed from the ends of the sleeve and needle cannulae, they function as curved barbs (15) projecting outward to anchor the device into tissue, an organ, or a foreign body. A slidable locking member (18), such as a pin vise, can be included over the outer needle cannula for securing the localization device against a template.
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Citations
19 Claims
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1. A localization device (10) comprising:
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an outer needle cannula (11) having a distal end (20);
a plurality of anchoring wires (12) comprising a superelastic material, the anchoring wires further having distal portions (14) extending laterally outward while in the unstressed state to form barbs (15) capable of engaging tissue; and
a sleeve cannula (13) to constrain the distal portions of the anchoring wires into a substantially straight configuration, the sleeve cannula slidably disposed within the outer needle cannula, the distal portions of the anchoring wires extending beyond the distal end of the sleeve cannula and the distal end of the outer needle cannula in the deployed condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A localization device (10) comprising:
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an outer needle cannula (11);
a plurality of anchoring wires (12) made of a superelastic material, the distal portions (14) of the anchoring wires extending laterally outward in the unstressed state to form barbs (15) capable of engaging tissue, the anchoring needles extending substantially the length of the localization device;
an anchoring wire holder (16) comprising a hollow cannula, the anchoring wires fixedly attached within the lumen of the anchoring wire holder such that each of the distal portions of the anchoring wires radiate outward therefrom in their unstressed state; and
a sleeve cannula (13) to constrain the distal portions of the anchoring wires into a substantially straight configuration, the sleeve cannula slidably disposed within the outer needle cannula, the distal portions of the anchoring wires extending beyond the distal end of the sleeve cannula and the distal end of the outer needle cannula in the deployed condition. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A localization device (10) comprising:
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an outer needle cannula (11) having a distal end (20), the outer needle cannula having a echogenic region disposed about the distal end thereof;
at least three anchoring wires (12) comprising a nickel-titanium alloy, the distal portions (14) of the anchoring wires extending laterally outward in the unstressed state to form barbs (15) capable of engaging tissue;
an anchoring wire holder (16) comprising a hollow cannula, the anchoring wires fixedly attached within the lumen of the anchoring wire holder such that each of the distal portions of the anchoring wires radiate outward therefrom in their unstressed state;
a sleeve cannula (13) to constrain the distal portions of the anchoring wires into a substantially straight configuration, the sleeve cannula slidably disposed within the outer needle cannula, the distal portions of the anchoring wires extending beyond the distal end of the sleeve cannula and the distal end of the outer needle cannula in the deployed condition; and
a movable collet slidably disposed over the outer needle cannula, the collet capable of being removed from the proximal end of the localization device.
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Specification