BIOPSY DEVICE

• US 20110301498A1
• Filed: 02/11/2010
• Published: 12/08/2011
• Est. Priority Date: 02/16/2009
• Status: Active Grant

• Current Assignee: Dokter Yves Fortems BVBA
• Original Assignee: Dokter Yves Fortems BVBA, Tigenix NV (Takeda Pharmaceutical Company Limited)
• Inventors: Maenhout, Sven, Motmans, Kris, Fortems, Yves, Jahraus, Andrea, Oprea, Wanda
• Granted Patent: US 8,740,811 B2
• Time in Patent Office: Days
• US Class Current: 600/567
• CPC Class Codes: A61B 10/0233 Pointed or sharp biopsy instruments
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• CPC Class Codes: A61B 2090/062 penetration depth

Abstract

This invention relates to a biopsy device consisting of an inner cannula (4) and an outer hollow tube (1), a handle (7) which may be removably attached to the outer hollow tube, a locking system to secure the inner cannula and/or the attenuator in the outer hollow tube, and characterized in that the tip of the outer hollow tube is ellipse shaped and extends beyond the inner cannula, the latter ending in a blunt edge. The blunted tip of the outer hollow tube together with the sharpened ending of the inner cannula determines the cutting edge of the device. In combination the distal ends of inner cannula and outer hollow tube determine the biopsy depth size and shape of the biopsy sample in a reproducible way. In one embodiment of the present invention, the length of the inner cannula can be controlled, allowing varying the aforementioned sample parameters as desired.

Claims

1. A biopsy device comprising an inner cannula having a cutting edge and an outer hollow tube extending beyond said inner cannula and having an ellipse shaped tip wherein the extended ellipse shaped tip of the outer hollow tube is blunt at its most distal end.

2. The device of claim 1 wherein the tip of the outer hollow tube, together with the tip of the inner cannula, composes the cutting edge of the biopsy device.

3. The device according to claim 1 wherein the extended ellipse shaped tip of the outer hollow tube forms a bevel angle of about 10-30°

.

4. The device according to claim 3 wherein the tip of the outer hollow tube has an outer beveled surface which is shaped such that the angle of the outer beveled surface is from about 100°

to 120°

.

5. The device according to claim 4 wherein the angle of the outer beveled surface at the cutting edge of the inner cannula is from about 17 to 25°

.

6. The device according to claim 1 wherein the outer hollow tube is about 15.0 to 20.0 cm long.

7. The device according to claim 1 wherein the outer hollow tube has an outer diameter of about 4.0 to 6.0 mm and an inner diameter of between about 3.0 to 5.0 mm.

8. The device according to claim 7 wherein the outer diameter of the inner cannula closely fits the inner surface of the outer hollow tube.

9. The device according to claim 1 wherein the inner cannula is controllably positioned within the device such that the length of the inner cannula is adjustable.

10. A biopsy device according to claim 1 further comprising a handle removably attached to the outer hollow tube and a locking system to secure the inner cannula in the outer hollow tube.

11. The biopsy device according to claim 10, wherein the handle comprises a pressure release system for the inner cannula.

12. The biopsy device according to claim 11, wherein the pressure release comprises a valve.

13. (canceled)

14. A method for gathering a biopsy sample comprising:

providing a biopsy device comprising an inner cannula having a cutting edge and an outer hollow tube extending beyond said inner cannula and having an ellipse shaped tip, wherein the extended ellipse shaped tip of the outer hollow tube is blunt at its most distal end;

closing the biopsy device;

entering the biopsy device into a body;

positioning the tip of the biopsy device to the sampling surface;

opening the biopsy device;

sliding the tip of the outer hollow tube over the sampling surface to cut the biopsy sample with the tip of the inner cannula;

harvesting the biopsy sample within the inner cannula while releasing pressure from said inner cannula;

retracting the biopsy device from the body; and

removing the biopsy sample from the device.

15. The method according to claim 14 wherein the biopsy device is closed by inserting an attenuator into the outer hollow tube.

16. The method according to claim 14 wherein the biopsy device is closed by positioning a cap over the outer hollow tube.