Biopsy device

Patent metadata

Field	Value
Publication number	US-10687791-B2
Application number	US-201715603854-A
Country	US
Kind code	B2
Filing date	May 24, 2017
Priority date	Dec 20, 2007
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A biopsy device includes a cannula that defines a tissue chamber configured to receive a tissue sample from a patient. A pressure chamber includes a body having a distal end and a proximal end. The proximal end has an inlet coupled in fluid communication with the cannula. The body has a first recessed area proximate the proximal end, wherein the first recessed area is configured to release positive pressure within the pressure chamber. The body has a second recessed area proximate the distal end, wherein the second recessed area is configured to release negative pressure within the pressure chamber. A piston is movably received in the body and configured to move over the first recessed area to release the positive pressure and configured to move over the second recessed area to release the negative pressure.

First claim

What is claimed is:

1. A biopsy device, comprising:
a cannula that defines a tissue chamber configured to receive a tissue sample from a patient;
a pressure chamber including a body having a distal end and a proximal end, the proximal end having an inlet coupled in fluid communication with the cannula;
the body having a first recessed area proximate the proximal end, wherein the first recessed area is configured to release positive pressure within the pressure chamber;
the body having a second recessed area proximate the distal end, wherein the second recessed area is configured to release negative pressure within the pressure chamber; and
a piston movably received in the body and configured to move over the first recessed area to release the positive pressure and configured to move over the second recessed area to release the negative pressure.

2. The biopsy device of claim 1 , further comprising a fluid receptacle interposed between the tissue chamber and the pressure chamber.

3. The biopsy device of claim 2 , comprising an absorbent material positioned in the fluid receptacle to absorb a fluid.

4. The biopsy device of claim 3 , wherein the absorbent material is a polyvinyl alcohol fabric.

5. The biopsy device of claim 1 , comprising a fluid receptacle in fluid communication with each of the tissue chamber and the pressure chamber, the fluid receptacle containing an absorbent material to absorb a body fluid received through the tissue chamber.

6. The biopsy device of claim 1 , wherein the cannula includes a first cannula portion and a second cannula portion, the first cannula portion being connected to the inlet of the pressure chamber and the second cannula portion including the tissue chamber, and further comprising a fluid receptacle interposed between the first cannula portion and the second cannula portion in fluid communication with each of the first cannula portion and the second cannula portion.

7. The biopsy device of claim 1 , wherein the cannula includes a first cannula portion and a second cannula portion, the first cannula portion being connected to the inlet of the pressure chamber, and the second cannula portion including the tissue chamber, and further comprising a fluid receptacle having a first fluid port and a second fluid port, the first fluid port being connected to the first cannula portion and the second fluid port being connected to the second cannula portion.

8. The biopsy device of claim 7 , comprising an absorbent material positioned in the fluid receptacle between the first fluid port and the second fluid port.

9. The biopsy device of claim 8 , wherein the absorbent material is a fabric made from one of cotton, cellulose, or polyvinyl alcohol.

10. The biopsy device of claim 1 , wherein the first recessed area is one of a plurality of recessed areas proximate the proximal end of the pressure chamber configured to release the positive pressure within the pressure chamber, wherein as the piston is advanced toward the proximal end of the pressure chamber but distal to the plurality of recessed areas proximate the proximal end of the pressure chamber, a positive pressure is created relative to an atmospheric pressure, and as the piston engages at least one of the plurality of recessed areas proximate to the proximal end of the pressure chamber, the positive pressure is released.

11. The biopsy device of claim 1 , wherein the second recessed area is one of a plurality of recessed areas proximate the distal end of the pressure chamber configured to release the negative pressure within the pressure chamber, wherein as the piston is advanced toward the distal end of the pressure chamber but proximal to the plurality of recessed areas proximate the distal end of the pressure chamber, a negative pressure is created relative to an atmospheric pressure, and as the piston engages at least one of the plurality of recessed areas proximate the distal end of the pressure chamber, the negative pressure is released.

12. A biopsy device, comprising:
a cannula that defines a tissue chamber configured to receive a tissue sample from a patient;
a pressure chamber including a body having a distal end and a proximal end, the proximal end having an inlet coupled in fluid communication with the cannula;
the body having a first recessed area proximate the proximal end, wherein the first recessed area is configured to release positive pressure within the pressure chamber;
the body having a second recessed area proximate the distal end, wherein the second recessed area is configured to release negative pressure within the pressure chamber;
a piston movably received in the body and configured to move over the first recessed area to release the positive pressure and configured to move over the second recessed area to release the negative pressure; and
a fluid receptacle interposed between the tissue chamber of the cannula and the inlet of the pressure chamber, the fluid receptacle containing a fluid-absorbing material.

13. The biopsy device of claim 12 , wherein the fluid-absorbing material is a polyvinyl alcohol fabric.

14. The biopsy device of claim 12 , wherein the fluid-absorbing material is a fabric made from one of cotton and cellulose.

15. The biopsy device of claim 12 , wherein the first recessed area is one of a plurality of recessed areas proximate the proximal end of the pressure chamber configured to release the positive pressure within the pressure chamber, wherein as the piston is advanced toward the proximal end of the pressure chamber but distal to the plurality of recessed areas proximate the proximal end of the pressure chamber, a positive pressure is created relative to an atmospheric pressure, and as the piston engages at least one of the plurality of recessed areas proximate to the proximal end of the pressure chamber, the positive pressure is released.

16. A biopsy device comprising:
a cannula that defines a tissue chamber;
a pressure chamber including a body having a distal end, a proximal end, and an inner wall, wherein the proximal end includes an inlet that is coupled to the cannula;
a first recessed area extending along the inner wall of the body, proximate the proximal end of the body of the pressure chamber, wherein the first recessed area is configured to release a first pressure within the pressure chamber;
a second recessed area extending along the inner wall of the body, proximate the distal end of the body of the pressure chamber, wherein the second recessed area is configured to release a second pressure within the pressure chamber;
a piston configured to selectively engage each of the first recessed area and the second recessed area to respectively release the first pressure and the second pressure from the pressure chamber; and
a fluid receptacle interposed between the tissue chamber and the pressure chamber, the fluid receptacle having an absorbent material to absorb a fluid.

17. The device of claim 16 , wherein the cannula includes a first cannula portion and a second cannula portion, the first cannula portion being connected to the inlet of the pressure chamber and the second cannula portion including the tissue chamber, wherein the fluid receptacle is interposed between the first cannula portion and the second cannula portion.

18. The device of claim 16 , wherein the cannula includes a first cannula portion and a second cannula portion, the first cannula portion being connected to the inlet of the pressure chamber and the second cannula portion including the tissue chamber, and wherein the fluid receptacle has a

Assignees

• Bard Inc C R

Inventors

• Seiger Jason
• Chudzik Rafal
• Jensen Angela
• Lazok Glen

Classifications

• A61M1/79

  Filters for solid matter (specially adapted for dental use A61C17/065) · CPC title

• A61M2005/3123

  having air entrapping or venting means, e.g. purging channels in pistons · CPC title

• A61B10/0275

  with sample notch, e.g. on the side of inner stylet · CPC title

• A61B2217/005

  with suction drainage system · CPC title

• A61B10/0283 Primary

  with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe (A61B10/025, A61B10/0266 take precedence) · CPC title