Vacuum assisted biopsy device

Patent metadata

Field	Value
Publication number	US-9901328-B2
Application number	US-201213490075-A
Country	US
Kind code	B2
Filing date	Jun 6, 2012
Priority date	Jun 6, 2012
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

Methods and devices for providing a biopsy device with a modified handle and stylet that provides a vacuum to be delivered to the targeted tissue for removal. The vacuum may draw the tissue into the notch where the tissue may then be severed via the cannula. Alternatively, the tissue may be drawn into to the notch after being severed via the stylet and/or cannula. The vacuum may be used to bring a larger amount of tissue into the notch than would otherwise be brought in the notch if no vacuum was used, providing a larger sample through the same size access point.

First claim

What is claimed is:

1. A vacuum-assisted biopsy device, comprising:
a stylet configured to incise tissue, the stylet including a notch defined by at least one wall; and
a vacuum pump producing a vacuum pressure;
a vacuum line comprising an annular wall and a lumen, the vacuum line in communication with the vacuum pump and a vacuum pathway, wherein the vacuum pathway is in communication with the vacuum line and the notch such that the vacuum line communicates the vacuum pressure from the vacuum pump through the lumen and the vacuum pathway to the notch along a first travel path; and
at least one outlet or passageway extending completely through the annular wall of the vacuum line, the outlet or passageway being proximal to the notch and spaced from the notch, the at least one outlet or passageway arranged to be operable contemporaneously with the vacuum pathway to communicate the vacuum pressure from the vacuum pump when the notch is in contact with a tissue sample, and
wherein the vacuum line is configured to communicate the vacuum pressure from the vacuum pump through the lumen and the outlet or passageway to the tissue sample along a second travel path such that the vacuum pressure is contemporaneously communicated along the first travel path and the second travel path, wherein the first travel path differs from the second travel path, and wherein the second travel path does not traverse the at least one wall defining the notch.

2. The vacuum-assisted biopsy device of claim 1 , further comprising a valve configured to control the vacuum generated by the vacuum pump and transmitted to the notch.

3. The vacuum-assisted biopsy device of claim 1 , further comprising one or more surface features located on an outside surface of the vacuum line.

4. The vacuum-assisted biopsy device of claim 1 , wherein a back portion of the stylet comprises an elongated portion configured to fit into the vacuum line.

5. The vacuum-assisted biopsy device of claim 1 , wherein an outer surface of the stylet is non-uniform.

6. The vacuum-assisted biopsy device of claim 5 , wherein the outer surface of the stylet includes one or more depressions to allow vacuum movement around the outer surface of the stylet.

7. The vacuum-assisted biopsy device of claim 1 , wherein:
the vacuum line is enclosed within the outer wall of the biopsy device;
a clearance separates an outer surface of the vacuum line with an inner surface of the outer wall; and
a plurality of asperities located on the outside surface of the vacuum line, the asperities having a height equal to the clearance between the outer surface of the vacuum line and the inner surface of the outer wall; wherein
a lubricant is provided in the clearance to form a vacuum membrane.

8. The vacuum-assisted biopsy device of claim 1 , further comprising one or more bores inside a back portion of the stylet to provide a communication between the notch and the vacuum line.

9. The vacuum-assisted biopsy device of claim 1 , further comprising a boss on a back portion of the stylet, wherein the boss includes a conduit, and is configured to fit within the vacuum line to connect the notch and the vacuum line.

10. The vacuum-assisted biopsy device of claim 9 , wherein the biopsy device comprises a fitting in which the boss is fitted, the fitting including a conduit to connect the notch and the vacuum line.

11. The vacuum-assisted biopsy device of claim 2 , wherein the valve is one of at least a pinch valve and a duck bill valve.

12. The vacuum-assisted biopsy device of claim 1 , wherein the tissue sample is one of a human tissue sample and an animal tissue sample.

13. A vacuum-assisted biopsy device, comprising:
a stylet configured to incise tissue, the stylet including a notch defined by at least one wall; and
a vacuum pump producing a vacuum pressure; and
a vacuum line comprising an annular wall and a lumen, the vacuum line in communication with the vacuum pump and a vacuum pathway, wherein the vacuum pathway is in communication with the vacuum line and the notch such that the vacuum line communicates vacuum pressure from the vacuum pump through the lumen and the vacuum pathway to the notch along a first travel path, and
wherein an outer surface of the annular wall of the vacuum line comprises a plurality of projections having depressions therebetween, the plurality of projections having a uniform height and uniformly spaced along the vacuum line in a direction of vacuum flow; and
at least one outlet or passageway extending completely through the annular wall of the vacuum line, the outlet or passageway being proximal to the notch and spaced from the notch, the at least one outlet or passageway arranged to be operable contemporaneously with the vacuum pathway to communicate the vacuum pressure from the vacuum pump when the notch is in contact with a tissue sample, and
wherein the vacuum line is configured to communicate the vacuum pressure from the vacuum pump through the lumen and the outlet or passageway to the tissue sample along a second travel path such that the vacuum pressure is contemporaneously communicated along the first travel path and the second travel path, wherein the first travel path differs from the second travel path and wherein the second travel path does not traverse the at least one wall defining the notch.

14. The vacuum-assisted biopsy device of claim 1 , wherein the vacuum pathway comprises a microbore.

15. A vacuum-assisted biopsy device, comprising:
a stylet configured to incise tissue, the stylet including a notch defined by at least one wall;
a vacuum pump;
a vacuum line comprising an annular wall and a lumen, the vacuum line in communication with the vacuum pump and the notch, the vacuum line being in communication with the notch via a vacuum pathway such that the vacuum line communicates vacuum pressure from the vacuum pump through the lumen and the vacuum pathway along a first travel path to a portion of tissue via the notch; and
an outlet or passageway extending completely through the annular wall of the vacuum line and which is spaced from the notch, wherein the outlet or passageway is arranged to be operable contemporaneously with the vacuum pathway to communicate the vacuum pressure from the vacuum pump when the notch is in contact with a tissue sample, wherein the vacuum line is configured to communicate the vacuum pressure from the vacuum pump through the lumen and the outlet or passageway to the tissue sample along a second travel path such that the vacuum pressure is contemporaneously communicated along the first travel path and the second travel path, wherein the vacuum pressure draws an additional portion of the tissue sample into the notch via the second travel path, wherein the first travel path differs from the second travel path, and wherein the second travel path does not traverse the at least one wall defining the notch.

Assignees

• Plishka Michael
• Linderman Evan
• Krueger John A
• Carefusion 2200 Inc

Inventors

• Plishka Michael
• Linderman Evan
• Krueger John A

Classifications

• A61B10/0283 Primary

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

• A61B10/0275

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