Biopsy device

• US 8,858,463 B2
• Filed: 11/07/2013
• Issued: 10/14/2014
• Est. Priority Date: 12/20/2007
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Seiger, Jason, Chudzik, Rafal, Jensen, Angela, Lazok, Glen
• Primary Examiner(s): Dougherty, Sean
• Assistant Examiner(s): Stout, Michael C
• Application Number:
  US14/074,051
• Publication Number:
  US 20140066805A1
• Time in Patent Office: 341 Days
• Field of Search: 600/565, 600/566
• US Class Current: 600/565
• CPC Class Codes: A61B 10/0275 with sample notch, e.g. on the side of inner stylet
• CPC Class Codes: A61B 10/0283 with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe A61B10/025, A61B10/0266 take precedence
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065
• CPC Class Codes: A61M 2005/3123 having air entrapping or venting means, e.g. purging channels in pistons

Abstract

A biopsy device is disclosed. The biopsy device includes a chamber having a body having a distal end and a proximal end, wherein the proximal end includes an inlet. The biopsy device further includes a vacuum generator for generating negative and positive pressure and at least one first recessed area and at least one second recessed area. The first recessed area extends along an inner wall of the body, proximate the proximal end of the body of the chamber. The first recessed area is configured to release pressure within the chamber. The second recessed area extends along the inner wall of the body, proximate the distal end of the body of the chamber. The second recessed area is configured to release pressure within the chamber.

Claims

1. A biopsy device comprising:

a chamber having a body having a proximal end, a distal end, and an inner wall, wherein the proximal end includes an inlet;

a cannula coupled to the inlet, the cannula configured to take a tissue sample from a patient;

a piston configured to engage the inner wall of the chamber;

a first recessed area extending along the inner wall of the body, distal to the proximal end of the body of the chamber, wherein the first recessed area is configured to release positive pressure within the chamber, wherein the first recessed area is configured to be longitudinal, diagonal, latitudinal, or circular; and

a second recessed area extending along the inner wall of the body, the second recessed area being separated distally from the first recessed area, the second recessed area being proximal to the distal end of the body of the chamber, wherein the second recessed area is configured to release negative pressure within the chamber, wherein the second recessed area is configured to be longitudinal, diagonal, latitudinal, or circular.

2. The device of claim 1, configured such that as the piston is moved toward the proximal end of the chamber but distal to the first recessed area, a positive pressure is generated relative to an atmospheric pressure, and as the piston is moved toward the distal end of the chamber but proximal to the second recessed area, a negative pressure is generated relative to an atmospheric pressure.

3. The device of claim 1, wherein the positive pressure in the chamber is normalized to an atmospheric pressure when the positive pressure is released.

4. The device of claim 1, wherein the negative pressure in the chamber is normalized to an atmospheric pressure when the negative pressure is released.

5. A biopsy device comprising:

a chamber having a body having a proximal end, a distal end, and an inner wall, wherein the proximal end includes an inlet;

a cannula coupled to the inlet of the chamber;

a first recessed area extending along the inner wall of the body, distal to the proximal end of the body of the chamber;

a second recessed area extending along the inner wall of the body, proximal to the distal end of the body of the chamber;

a piston configured to engage the inner wall of the chamber; and

the chamber and piston configured such that as the piston engages the first recessed area, a positive pressure is released through the first recessed area, and as the piston engages the second recessed area, a negative pressure is released through the second recessed area.

6. The device of claim 5, wherein the positive pressure in the chamber is normalized to an atmospheric pressure when the positive pressure is released.

7. The device of claim 5, wherein the negative pressure in the chamber is normalized to an atmospheric pressure when the negative pressure is released.

8. The device of claim 5, wherein the first recessed area is configured to be longitudinal, diagonal, latitudinal, or circular.

9. The device of claim 8, wherein the second recessed area is configured to be longitudinal, diagonal, latitudinal, or circular.

10. The device of claim 5, wherein as the piston is advanced toward the proximal end of the chamber but distal to the first recessed area, the positive pressure is generated relative to an atmospheric pressure.

11. The device of claim 5, wherein as the piston is advanced toward the distal end of the chamber but proximal to the second recessed area, a negative pressure is generated relative to an atmospheric pressure.

12. The device of claim 5, comprising a fluid receptacle disposed between the distal end of the chamber and the cannula.

13. The device of claim 12, wherein the fluid receptacle is configured to absorb fluid.

14. The device of claim 13, wherein the fluid receptacle is an absorbent material.

15. The device of claim 5, wherein the cannula is configured to receive a tissue sample from a biopsy site.

16. The device of claim 15, wherein the cannula further comprises a cutting sheath configured to sever the tissue sample from the biopsy site.