Biopsy anchor device with cutter

• US 7,377,902 B2
• Filed: 01/23/2002
• Issued: 05/27/2008
• Est. Priority Date: 04/08/1998
• Status: Expired due to Fees

• Current Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Original Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Inventors: Jones, Michael L., Quick, Richard L., Lubock, Paul, Burbank, Fred, Shabaz, Martin V.
• Primary Examiner(s): Hindenburg; Max F.
• Assistant Examiner(s): HOEKSTRA, JEFFREY GERBEN
• Application Number:
  US10/056,453
• Publication Number:
  US 20030144605A1
• Time in Patent Office: 2,316 Days
• Field of Search: 600/562, 600/564, 600/567, 600/568, 600/570, 606/45, 606/167, 606/180, 606/176, 606/171, 606/170
• US Class Current: 600/564
• CPC Class Codes: A61B 10/02 Instruments for taking cell samples or for biopsy A61B10/0038 and A61B10/0045 take precedence; needle locating or guiding means A61B17/3403; samplers for enzymology or microbiology C12M1/26; sampling or preparing biological specimens G01N33/48
• CPC Class Codes: A61B 10/0266 means for severing sample
• CPC Class Codes: A61B 17/00491 Surgical glue applicators surgical adhesives A61L24/00; two-component delivery syringes A61M5/19
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/282 Jaws
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/3439 with means for changing the inner diameter of the cannula, e.g. expandable A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 18/1482 having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
• CPC Class Codes: A61B 18/1487 Trocar-like, i.e. devices producing an enlarged transcutaneous opening
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2010/0208 Biopsy devices with actuators, e.g. with triggered spring mechanisms
• CPC Class Codes: A61B 2017/320064 with tissue or sample retaining means
• CPC Class Codes: A61B 2017/320733 with a flexible cutting or scraping element, e.g. with a whip-like distal filament member
• CPC Class Codes: A61B 2017/3484 Anchoring means, e.g. spreading-out umbrella-like structure
• CPC Class Codes: A61B 2017/3488 Fixation to inner organ or inner body tissue
• CPC Class Codes: A61B 2018/00208 : actively driven, e.g. by a motor
• CPC Class Codes: A61B 2018/00214 : Expandable means emitting energy, e.g. by elements carried thereon
• CPC Class Codes: A61B 2018/00267 : having a basket shaped structure
• CPC Class Codes: A61B 2018/00273 : Anchoring means for temporary attachment of a device to tissue
• CPC Class Codes: A61B 2018/00333 : Breast
• CPC Class Codes: A61B 2018/00577 : Ablation
• CPC Class Codes: A61B 2018/00601 : Cutting
• CPC Class Codes: A61B 2018/00898 : Alarms or notifications created in response to an abnormal condition
• CPC Class Codes: A61B 2018/0091 : Handpieces of the surgical instrument or device
• CPC Class Codes: A61B 2018/00916 : with means for switching or controlling the main function of the instrument or device
• CPC Class Codes: A61B 2018/1246 : characterised by the output polarity
• CPC Class Codes: A61B 2018/1253 : monopolar
• CPC Class Codes: A61B 2018/126 : bipolar
• CPC Class Codes: A61B 2018/1407 : Loop
• CPC Class Codes: A61B 2018/1425 : Needle
• CPC Class Codes: A61B 2018/144 : Wire
• CPC Class Codes: A61B 2018/1475 : Electrodes retractable in or deployable from a housing
• CPC Class Codes: A61B 2018/162 : located on the probe body
• CPC Class Codes: A61B 2018/1861 : with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61B 2090/3908 : Soft tissue, e.g. breast tissue
• CPC Class Codes: A61B 90/02 : Devices for expanding tissue, e.g. skin tissue implements for holding wounds open, surgical tractors A61B17/02; implantable mammary prosthesis A61F2/12; dilators A61M29/00
• CPC Class Codes: A61B 90/37 : Surgical systems with images on a monitor during operation
• CPC Class Codes: A61B 90/39 : Markers, e.g. radio-opaque or breast lesions markers

Abstract

A device for accessing and for isolating a desired site within a patient'"'"'s body, and for obtaining a body of tissue from a patient at the site that includes an electrosurgical cutting electrode near the distal tip of a shaft, an anchoring mechanism and an electrosurgical side-cutting device. Methods are provided for accessing a target site within a patient'"'"'s body, anchoring a body of tissue at the site, and isolating the body of tissue at the site. The method may be performed for a surgical biopsy or lumpectomy at the target site within a patient'"'"'s body.

Claims

1. A system for accessing target tissue within a patient and isolating a body of target tissue from its supporting bed, comprising

a. a biopsy device having a wand with a proximal portion and a distal portion, a housing on the proximal portion, an electrosurgical tissue cutting electrode secured to the distal portion of the wand, a first electrical conductor extending within the wand having a distal end electrically connected to the electrosurgical electrode and a proximal end configured to be electrically connected to an electrical power source, at least one deployable tissue contacting element connected to said distal wand portion and at least one driving member within the housing configured to move at least one deployable tissue contacting element of the biopsy device;

b. a replaceable drive unit having a receptacle for engaging and releasably holding at least a portion of the housing on the proximal portion of the wand, and a driving element configured to engage the at least one driving member within the housing configured to transfer mechanical power to said biopsy device; and

d. a motor unit for engaging and providing power to the driving element of the drive unit, comprising a securing mechanism effective to form a mechanically stable engagement between said motor unit and said drive element of the driving unit to transfer mechanical power therebetween.

2. The system of claim 1, wherein said at least one deployable element is a side-cutting element.

3. The system of claim 2, wherein the wand has a distal end and said side-cutting element is located proximal to the distal end of the wand.

4. The system of claim 3, wherein said side-cutting mechanism is configured to be rotated about a longitudinal axis of the wand to isolate a body of target tissue when said wand is disposed within a patient.

5. The system of claim 2, wherein said tissue anchoring mechanism comprises a radially extending wire.

6. The system of claim 2, wherein said anchoring mechanism of said biopsy device includes a plurality of elongated members configured to expand outwardly from the wand and to penetrate into target tissue.

7. The system of claim 6 wherein said elongated members of said anchoring mechanism are formed at least in part of electrically conducting material.

8. The system of claim 7 wherein a third electrical conductor extends within the elongated shaft of the biopsy device and has a distal end electrically connected to at least one of the elongated members and a proximal end configured to be electrically connected to an electrical power source.

9. The system of claim 7 wherein the elongated members of said anchoring mechanism are metallic wires or ribbons.

10. The system of claim 7 wherein the wires or ribbons are movably mounted to the wand of the biopsy device and have a contracted configuration to facilitate advancement of the biopsy device within the patient and a radially expanded configuration to penetrate into target tissue.

11. The system of claim 1 wherein the at least one deployable element is an anchoring mechanism which is configured to be extended into the body of target tissue when said wand is disposed within a patient.

12. The system of claim 11, including a side-cutting mechanism comprising an elongated electrode having a distal end secured distal to the anchoring mechanisms, a proximal end secured proximal to the anchoring mechanism and a second electrical conductor extending within the wand having a distal end electrically connected to the elongated electrode and a proximal end configured to be electrically connected to an electrical power source.

13. The system of claim 1, wherein the drive element of said drive unit is configured to engage a shuttle effective to deploy or retract the deployable element of said biopsy device.

14. The system of claim 1, wherein said drive unit further comprises a drive gear configured to engage a shaft gear effective to rotate said wand.

15. The system of claim 1, wherein said drive unit has a mechanical connector comprising a spindle, and wherein said transferred mechanical power comprises rotary power.

16. The system of claim 1, wherein said securing mechanism of said motor unit comprises a releasable connection.

17. The system of claim 1, wherein said mechanical power of said motor unit comprises rotary power and said securing mechanism comprises a ridged sleeve configured to receive a spindle effective to transfer rotary motion.

18. The system of claim 1, wherein said electrosurgical electrode of said biopsy device has a cutting surface spaced distal to the distal end of the shaft.

19. A system for severing a tissue body within a patient from supporting tissue, comprising:

a. a tissue severing unit having an elongated wand with a tissue cutting element on a distal portion of the wand, an additional operative element on the distal portion of the wand and a housing on a proximal portion of the wand and moving elements within the housing for moving the tissue cutting element and the additional operative element;

b. a replaceable drive unit having a recess for receiving at least a portion of the housing of the tissue severing unit and having driving elements for engaging moving elements within the housing of the tissue severing unit to operate the tissue cutting element and the additional operative element on the distal portion of the wand; and

c. a motor unit having a motor, a mechanical connector configured to transfer mechanical power from the motor to the driving elements of the drive unit to operate the tissue severing element and to operate the additional operative element of the tissue severing unit.

20. The system of claim 19 including a securing mechanism effective to form a mechanically stable engagement between the motor unit and the drive unit, and a coupling mechanism configured to engage with the mechanical connector of the motor unit effective to transfer mechanical power.

21. The system of claim 20 wherein the mechanical power is rotational power.

22. The system of claim 19, wherein the drive unit is configured to engage a shuttle operably connected to a moving member in the housing of the tissue severing unit to operate an operative element on the distal portion of the wand.

23. The system of claim 22, wherein the drive unit includes a drive gear configured to engage a moving member within the housing of the tissue severing unit.

24. The system of claim 23 wherein the moving member is a shaft gear that is effective to rotate the wand of the tissue severing unit.

25. The system of claim 19, wherein the tissue cutting element is a radially deployable cutting element.

26. The system of claim 25 wherein the deployable cutting element is an electrosurgical cutting element.

27. The system of claim 19 wherein the mechanical connector includes a spindle.