QUICK CYCLE BIOPSY SYSTEM

• US 20110208085A1
• Filed: 04/29/2011
• Published: 08/25/2011
• Est. Priority Date: 01/31/2005
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Kalis, Robert W., McCullough, Adam B.
• Granted Patent: US 8,702,621 B2
• Time in Patent Office: Days
• US Class Current: 600/565
• 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 2010/0225 for taking multiple samples

Abstract

A biopsy apparatus includes a cannula, a cutting sheath, a pressure generating device and a valve. The cannula has a lumen, a proximal portion, a closed distal end, and an orifice located on a circumferential surface of the cannula. The orifice is configured to receive a tissue sample into the lumen of the cannula. The cutting sheath is coaxially disposed with the cannula. The cutting sheath is configured to be movable relative to the cannula to selectively cover the orifice. The pressure generating device is coupled to the proximal portion of the cannula. A valve is interposed between the cannula and the pressure generating device. The valve is configured to control a flow of a fluid between the lumen of the cannula and the pressure generating device.

Claims

1. A biopsy apparatus, comprising:

a cannula having a lumen, a proximal portion, a closed distal end, and an orifice located on a circumferential surface of the cannula, the orifice being configured to receive a tissue sample into the lumen of the cannula;

a cutting sheath coaxially disposed with the cannula, the cutting sheath being configured to be movable relative to the cannula to selectively cover the orifice;

a pressure generating device coupled to the proximal portion of the cannula; and

a valve interposed between the cannula and the pressure generating device, the valve being configured to control a flow of a fluid between the lumen of the cannula and the pressure generating device.

2. The biopsy apparatus of claim 1, comprising an actuator configured to control the opening and closing of the valve.

3. A biopsy apparatus, comprising:

a cannula having a lumen, a proximal portion, a closed distal end, and an orifice located on a circumferential surface of the cannula, the orifice being configured to receive a tissue sample into the lumen of the cannula;

a cutting sheath coaxially disposed with the cannula;

a pressure generating device connected to the proximal portion of the cannula, the pressure generating device being configured to generate a pressure; and

a valve interposed between the cannula and the pressure generating device, the valve being configured to control application of the pressure to the lumen of the cannula.

4. The biopsy apparatus of claim 3, wherein the pressure is one of a negative pressure and a positive pressure.

5. The biopsy apparatus of claim 4, comprising an actuator configured to place the valve in a closed position to facilitate a build-up of the pressure in the pressure generating device, and configured to subsequently open the valve to apply the pressure to the lumen of the cannula.

6. The biopsy apparatus of claim 4, comprising an actuator configured to operate the valve to build-up the pressure in the pressure generating device to a pressure level desired by an operator.

7. The biopsy apparatus of claim 6, wherein the actuator is configured to operate the valve to apply the pressure to the lumen of the cannula.

8. The biopsy apparatus of claim 3, wherein the pressure generating device includes:

a cylinder defining a chamber, the cylinder having a first end and a second end;

a piston slidably disposed within the chamber;

a first port located at the first end of the cylinder, the first port being coupled to the valve; and

a second port configured to allow air inflow into the chamber when the piston is displaced to a second end of the cylinder.

9. The biopsy apparatus of claim 3, comprising a stopper position in the lumen of the cannula in a location proximal to the orifice, the stopper being configured to partially obstruct the lumen and prevent the tissue sample from migrating to the proximal portion of the cannula.

10. The biopsy apparatus of claim 3, comprising:

a housing containing an electric power source and a tension slide connected to the power source, wherein the tension slide is brought into a cocked position against the action of a spring by the power source; and

a removable element configured for insertion into the housing, the removable element including;

the pressure generating device;

the valve;

a biopsy cannula unit including the cannula and the cutting sheath, wherein the biopsy cannula unit is arranged on the tension slide;

a first connection element interposed between the biopsy cannula unit and the valve; and

a second connection element interposed between the valve and the pressure generating device.

11. The biopsy apparatus of claim 10, wherein the pressure generating device comprises a syringe unit having a cylinder and a plunger positioned in the cylinder, the cylinder having a ventilation opening configured to dissipate a created vacuum.

12. The biopsy apparatus of claim 11, comprising a controllable spindle actuator configured to move the plunger in a proximal direction from a distal end of the cylinder to a first point adjacent but distal the ventilation opening to generate a vacuum, and the controllable spindle actuator being configured to move the plunger to a second point proximal the ventilation opening to release the vacuum.

13. The biopsy apparatus of claim 12, wherein the controllable spindle actuator is configured to move the plunger toward the distal end of the cylinder to create a positive pressure in the lumen.

14. A biopsy apparatus, comprising:

a housing;

a removable element configured for insertion into the housing, the removable element including;

a cannula having a lumen, a proximal portion, a closed distal end, and an orifice located on a circumferential surface of the cannula;

a sheath coaxially disposed with the cannula;

a pressure generating device coupled to the proximal portion of the cannula; and

a valve interposed in fluid communication with the cannula and the pressure generating device; and

an actuator located in the housing, the actuator being configured to operate the valve to build-up either positive pressure or negative pressure in the pressure generating device to a pressure level desired by an operator, the actuator being configured to operate the valve to apply built-up positive pressure or negative pressure to the lumen of the cannula.