BIOPSY MARKER DELIVERY DEVICE

• US 20100049084A1
• Filed: 08/22/2008
• Published: 02/25/2010
• Est. Priority Date: 08/22/2008
• Status: Active Grant

• Current Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Original Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Inventors: Nock, Andrew P., Ramos, Ramon
• Granted Patent: US 8,532,747 B2
• Time in Patent Office: Days
• US Class Current: 600/562
• CPC Class Codes: A61B 10/0275 with sample notch, e.g. on the side of inner stylet
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2090/3908 Soft tissue, e.g. breast tissue
• CPC Class Codes: A61B 2090/3987 Applicators for implanting markers
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers

Abstract

A biopsy device for delivering a biopsy marker to a biopsy site is disclosed. The biopsy device can include a marker deployer having a unitary endpiece disposed in a distal end of the cannula. The distal endpiece can be a molded component which includes a distal tip, a marker deployment ramp, and a marker engaging element that aids in retaining the marker in the cannula until the marker is meant to be deployed.

Claims

1. A biopsy marker delivery device comprising:

a cannula having an internal lumen extending from a proximal end of the cannula to the distal end of the cannula, and a marker exit formed in a sidewall of the cannula proximal to the distal end of the cannula;

a distal tip closing the distal end of the cannula;

a ramp positioned adjacent the marker exit;

a marker engaging element disposed within the internal lumen of the cannula, wherein at least a portion of the marker engaging element is disposed distally of a proximal end of the market exit port; and

at least one marker disposed within the internal lumen of the cannula.

2. The device of claim 1 wherein the ramp and marker engaging element comprise a unitary component.

3. The device of claim 1 wherein the ramp and marker engaging element are integral with the distal tip.

4. The device of claim 1 wherein the distal tip, ramp, and marker engaging element comprise a unitary component.

5. The device of claim 1 wherein the distal tip, ramp, and marker engaging element comprise a unitary molded component.

6. The device of claim 1 wherein the cannula comprises a relatively flexible thin walled tube, and wherein the marker engaging element comprises a relatively stiff member disposed within the internal lumen.

7. The device of claim 1 wherein the cannula has a wall thickness t, and wherein the thickness of the marker engaging element is greater than t.

8. The device of claim 1 wherein the marker engaging element comprises a step having a generally uniform thickness along at least a portion of its axial length.

9. The device of claim 8 wherein the marker engaging element comprises a tapered proximal end.

10. The device of claim 1 wherein the distal tip is relatively more radiopaque than the cannula.

11. The device of claim 10 wherein the distal tip, ramp, and the marker engaging element are relatively more radiopaque than the cannula.

12. The device of claim 11 wherein the distal tip, ramp, and marker engaging element comprise a radiopaque material.

13. The device of claim 12 wherein the distal tip, ramp, and marker engaging element are a unitary molded component comprising barium sulfate.

14. The device of claim 1 wherein the marker engaging element extends along a floor of the internal lumen generally opposite of the marker exit.

15. The device of claim 1 wherein the marker engaging element is disposed in the cannula to reinforce the cannula.

16. A biopsy marker delivery device comprising:

a cannula having a proximal end, a distal end, an internal lumen extending from the proximal end to the distal end, and a marker exit formed in the side wall of the cannula;

a unitary endpiece disposed in the distal end of the cannula, the unitary endpiece comprising;

a distal tip;

a ramp disposed proximally of the distal tip and having a ramp surface extending from a distal end of the marker exit;

a marker engaging element extending proximally from the ramp; and

at least one biopsy marker disposed within the internal lumen of the cannula.