Biopsy apparatus

• US 8,764,679 B2
• Filed: 08/05/2013
• Issued: 07/01/2014
• Est. Priority Date: 11/06/2000
• Status: Expired due to Fees

• Current Assignee: Suros Surgical Systems Incorporated (Hologic Incorporated)
• Original Assignee: Suros Surgical Systems Incorporated (Hologic Incorporated)
• Inventors: Miller, Michael E., Mark, Joseph L., Butcher, Charles
• Primary Examiner(s): SZMAL, BRIAN SCOTT
• Application Number:
  US13/959,095
• Publication Number:
  US 20140012158A1
• Time in Patent Office: 330 Days
• Field of Search: 600562-568
• 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 cutting 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. A method of controlling a biopsy device to clear a tissue sample disposed within the biopsy device, the biopsy device comprising an open leak path, a cutting cannula and a tissue receiving cannula, the tissue receiving cannula defining a tissue receiving opening adjacent a closed distal end thereof and a tissue receiving cannula lumen and having a cutting board distal of the tissue receiving opening, the cutting cannula defining an open distal end and a cutter lumen, the cutting cannula being slideably disposed within the tissue receiving cannula, the leak path being in fluid communication with the tissue receiving cannula lumen and atmosphere, the method comprising:

applying vacuum through a proximal end of the cutter lumen;

retracting the cutting cannula proximally from the cutting board; and

drawing air into the biopsy device through the leak path and into a proximal end of the tissue receiving cannula to relieve a vacuum formed distal of the tissue sample,

wherein the open leak path is continuously open.

2. The method of claim 1, wherein the vacuum is applied continuously.

3. The method of claim 1, further comprising applying vacuum through the proximal end of the cutter lumen while the vacuum formed distal of the tissue sample is relieved to draw the tissue sample through the cutter lumen and out of the proximal end of the cutter lumen.

4. A method of controlling a biopsy device to clear a tissue sample disposed within the biopsy device, the biopsy device comprising an open leak path, a cutting cannula and a tissue receiving cannula, the tissue receiving cannula defining a tissue receiving opening adjacent a closed distal end thereof and a tissue receiving cannula lumen and having a cutting board distal of the tissue receiving opening, the cutting cannula defining an open distal end and a cutter lumen, the cutting cannula being slideably disposed within the tissue receiving cannula, the leak path being in fluid communication with the tissue receiving cannula lumen and atmosphere, the method comprising:

applying vacuum through a proximal end of the cutter lumen;

retracting the cutting cannula proximally from the cutting board; and

drawing air into the biopsy device through the leak path and into a proximal end of the tissue receiving cannula to relieve a vacuum formed distal of the tissue sample,

wherein a proximal end of the tissue receiving cannula is coupled to a housing and the open leak path is defined by an engagement area between the tissue receiving cannula and the housing.

5. The method of claim 4, wherein the open leak path is continuously open.

6. The method of claim 4, wherein the vacuum is applied continuously.

7. The method of claim 4, further comprising applying vacuum through the proximal end of the cutter lumen while the vacuum formed distal of the tissue sample is relieved to draw the tissue sample through the cutter lumen and out of the proximal end of the cutter lumen.

8. A method of controlling a biopsy device to clear a tissue sample disposed within the biopsy device, the biopsy device comprising an open leak path, a cutting cannula and a tissue receiving cannula, the tissue receiving cannula defining a tissue receiving opening adjacent a closed distal end thereof and a tissue receiving cannula lumen and having a cutting board distal of the tissue receiving opening, the cutting cannula defining an open distal end and a cutter lumen, the cutting cannula being slideably disposed within the tissue receiving cannula, the leak path being in fluid communication with the tissue receiving cannula lumen and atmosphere, the method comprising:

applying vacuum through a proximal end of the cutter lumen;

retracting the cutting cannula proximally from the cutting board; and

drawing air into the biopsy device through the leak path and into the distal end of the cutting cannula to relieve a vacuum formed distal of the tissue sample,

wherein a proximal end of the tissue receiving cannula is coupled to a housing and the open leak path is defined by an engagement area between the tissue receiving cannula and the housing.

9. The method of claim 8 wherein the open leak path is continuously open.

10. The method of claim 8, wherein the vacuum is applied continuously.

11. The method of claim 8, further comprising applying vacuum through the proximal end of the cutter lumen while the vacuum formed distal of the tissue sample is relieved to draw the tissue sample through the cutter lumen and out of the proximal end of the cutter lumen.