Selectively detachable outer cannula hub

• US 20060155209A1
• Filed: 02/28/2006
• Published: 07/13/2006
• Est. Priority Date: 11/06/2000
• Status: Active Grant

• Current Assignee: Charles Butcher, John P. Hancock, Joseph L. Mark, Michael E. Miller
• Original Assignee: Charles Butcher, John P. Hancock, Joseph L. Mark, Michael E. Miller
• Inventors: Butcher, Charles, Miller, Michael E., Mark, Joseph L., Hancock, John P.
• Granted Patent: US 7,883,476 B2
• Time in Patent Office: Days
• US Class Current: 600/566
• CPC Class Codes: A61B 10/025 for taking bone, bone marrow or cartilage samples
• 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 2010/0208 Biopsy devices with actuators, e.g. with triggered spring mechanisms
• CPC Class Codes: A61B 2017/00973 pedal-operated
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system

Abstract

A disposable tissue removal device comprises a “tube within a tube” cutting element mounted to a handpiece. The inner cannula of the cuffing element defines an inner lumen and terminates in an inwardly beveled, razor-sharp cutting edge. The inner cannula is driven by both a rotary motor and a reciprocating motor. At the end of its stroke, the inner cannula makes contact with the cutting board to completely sever the tissue. An aspiration vacuum is applied to the inner lumen to aspirate excised tissue through the inner cannula and into a collection trap that is removably mounted to the handpiece. The rotary and reciprocating motors are hydraulically powered through a foot pedal operated hydraulic circuit. The entire biopsy device is configured to be disposable. In one embodiment, the cutting element includes a cannula hub that can be connected to a fluid source, such as a valve-controlled saline bag.

Claims

1-7. -7. (canceled)

8. A medical device for attaching to a handpiece having an inner cutting element, said medical device comprising:

an outer cannula having a proximal end and a distal end, said outer cannula being sized to accept the inner cutting element; and

a cannula hub having a bore therethrough said cannula hub being attached to said proximal end, wherein said cannula hub is configured for selective removable engagement with the handpiece.

9. The device of claim 8, further comprising:

an instrument selectively insertable through said bore and into said outer cannula.

10. The device of claim 9, wherein said instrument is an obturator.

11. The device of claim 8, wherein a marker, a therapeutic agent, a fluid, or a drug is provided through said bore when the handpiece is removed from said cannula hub.

12. The device of claim 8, wherein said cannula hub is configured to facilitate delivery of a marker.

13. A medical device comprising:

a handpiece having an inner cutting instrument;

an outer cannula having a proximal end and a distal end, said proximal and distal ends sized for selective insertion of said inner cutting instrument; and

a cannula hub having a bore therethrough, said cannula hub being attached to said proximal end of said outer cannula, wherein said cannula hub is selectively detachable from said handpiece.

14. The device of claim 13, wherein said bore provides for insertion of a medical instrument through said bore and into said outer cannula when said cannula hub is detached from said handpiece.

15. The device of claim 14, wherein said medical instrument is an obturator.

16. The device of claim 13, wherein said bore provides for insertion of at least one of a marker, a fluid, a medicine, and a therapeutic agent, to said outer cannula.

17. The device of claim 13, wherein said cannula hub is configured to facilitate delivery of a marker.

18. A tissue cutting device comprising:

a handpiece;

a cannula hub mounted to said handpiece so as to be selectively removable from said handpiece, said cannula hub having a bore therethrough;

an outer cannula supported at a proximal end by said cannula hub and defining a tissue-receiving opening adjacent a distal end thereof, and a lumen between said proximal and distal ends; and

an inner cutting member attached to said handpiece and slidably disposed within said lumen of said outer cannula, said inner cutting member defining a cutting edge at said distal end operable to sever tissue projecting through said tissue-receiving opening.

19. The device of claim 18, further comprising a medical instrument selectively insertable through said bore.

20. The device of claim 19, wherein said medical instrument is an obturator.

21. The device of claim 18, wherein said bore provides an opening for the selective application of at least one of a site marker, a fluid, a drug, and a therapeutic agent, said selective application occurring when said cannula hub is detached from said handpiece.

22. The device of claim 18, wherein said cannula hub is configured to facilitate delivery of a marker.