Cutter drive assembly for biopsy device

• US 9,468,424 B2
• Filed: 08/28/2014
• Issued: 10/18/2016
• Est. Priority Date: 06/12/2009
• Status: Expired due to Fees

• Current Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Original Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Inventors: Hibner, John A., Mescher, Patrick A., Rhad, Edward A.
• Primary Examiner(s): Eiseman, Adam J
• Assistant Examiner(s): Warsi, Yasmeen S
• Application Number:
  US14/471,595
• Publication Number:
  US 20140371626A1
• Time in Patent Office: 782 Days
• Field of Search: 600562-567
• US Class Current: 1/1
• CPC Class Codes: A61B 10/0096 Casings for storing test samples A61B10/0038 and A61B10/0045 take precedence; preservation of living parts of the human or animal body A01N1/02; containers for retaining a material to be analysed B01L3/50; containers for enzymology or microbiology C12M1/16; swab-sampler being part of enzymology or microbiology container C12M1/30
• 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 device comprises a body, a needle, and a cutter actuation mechanism. The needle extends distally from the body. The cutter actuation mechanism rotates and translates the cutter relative to the body and relative to the needle. The cutter has an overmold presenting a lead screw and a hex portion. The cutter actuation mechanism comprises a first gear disposed about the hex portion of the overmold and a second gear engaged with the lead screw of the overmold by a nut that is integral with the second gear. The cutter actuation mechanism is operable to simultaneously rotate the first gear relative to the body at a first rotational speed and the second gear relative to the body at a second rotational speed. With the lead screw and the nut rotating at different rotational speeds, the lead screw rotates relative to the nut at a third rotational speed.

Claims

1. A biopsy device, comprising:

(a) a body;

(b) a needle extending distally relative to the body, wherein the needle defines a first lumen and a second lumen, wherein the needle includes an opening fluidly coupling the first lumen with the second lumen;

(c) a cutter, wherein the cutter comprises a first integral member and a second integral member, wherein the cutter is configured to translate relative to the needle to sever tissue;

(d) a vent opening, wherein the vent opening is in communication with atmospheric air; and

(e) a shuttle valve slider disposed between the first integral member and the second integral member of the cutter, wherein the first integral member is operably configured to drive the shuttle valve slider to a first position, wherein the second integral member is operably configured to drive the shuttle valve slider to a second position, wherein the second lumen is coupled with the vent opening when the shuttle valve slider is in the first position, wherein the second lumen is sealed relative to the vent opening when the shuttle valve slider is in the second position.

2. The biopsy device of claim 1, wherein the shuttle valve slider is coaxially disposed about the cutter.

3. The biopsy device of claim 1, wherein the first lumen of the needle extends along a first longitudinal axis, wherein the second lumen of the needle extends along a second longitudinal axis.

4. The biopsy device of claim 3, wherein the cutter is configured to translate along the first longitudinal axis.

5. The biopsy device of claim 4, wherein the cutter is positioned in the first lumen.

6. The biopsy device of claim 4, wherein the shuttle valve slider is configured to translate along the first longitudinal axis.

7. The biopsy device of claim 1, wherein the shuttle valve slider is slidable relative to the cutter.

8. The biopsy device of claim 1, further comprising a cutter actuation mechanism, wherein the cutter actuation mechanism comprises a first rotating member and a second rotating member, wherein the first rotating member is configured to rotate the cutter, wherein the second rotating member is configured to translate the cutter, wherein the cutter actuation mechanism is configured such that the first rotating member and the second rotating member rotate simultaneously at different rotational speeds.

9. The biopsy device of claim 1, further comprising a needle hub secured to the needle, wherein the needle hub extends proximally into the body.

10. The biopsy device of claim 9, wherein the vent opening is formed in the needle hub.

11. The biopsy device of claim 10, wherein the shuttle valve slider is slidably disposed in the needle hub.

12. The biopsy device of claim 1, wherein the first integral member is configured to push the shuttle valve slider proximally in response to proximal translation of the cutter, wherein the second integral member is configured to push the shuttle valve slider distally in response to distal translation of the cutter.

13. The biopsy device of claim 1, wherein the shuttle valve slider defines an inner diameter, wherein the cutter defines an outer diameter, wherein the inner diameter of the shuttle valve slider is greater than the outer diameter of the cutter to define an air gap between the inner diameter of the shuttle valve slider and the outer diameter of the cutter.

14. The biopsy device of claim 1, wherein the shuttle valve slider is configured to couple the second lumen with the vent opening when the shuttle valve slider is positioned distal to the vent opening.

15. The biopsy device of claim 14, wherein the shuttle valve slider includes a pair of longitudinally spaced apart o-rings, wherein the shuttle valve slider is configured to seal the second lumen relative to the vent opening when the shuttle valve slider is longitudinally positioned such that the vent opening is positioned between the longitudinally spaced apart o-rings.

16. The biopsy device of claim 1, wherein the cutter is configured to translate through a first range of motion from a first cutter position to a second cutter position, wherein the cutter is configured to move the shuttle valve slider only when the cutter moves through a first part of the first range of motion, wherein the cutter does not move the shuttle valve slider when the cutter moves through a second part of the first range of motion.

17. A biopsy device, comprising:

(a) a body;

(b) a needle extending distally relative to the body, wherein the needle defines a first lumen and a second lumen;

(c) a cutter, wherein the cutter is configured to translate relative to the needle; and

(d) a valve assembly disposed coaxially relative to the cutter, wherein the valve assembly comprises;

(i) a hub extending proximally from the needle,

(ii) a vent opening disposed on the hub, and

(iii) a shuttle valve slider slidably disposed within the hub, wherein the shuttle valve slider is operable to translate as the cutter translates relative to the needle through a first range of motion, wherein the shuttle valve slider is operable to remain stationary relative to the cutter while the cutter translates relative to the needle through a second range of motion, wherein the shuttle valve slider is configured to selectively vent or seal the second lumen relative to atmospheric air based on the longitudinal position of the shuttle valve slider,

wherein the cutter includes a first integral stop member and a second integral stop member, the first integral stop member having a proximal face operable to push the shuttle valve slider proximally, the second integral stop member having a distal face operable to push the shuttle valve slider distally.

18. The biopsy device of claim 17, wherein the proximal face of the first integral stop member and the distal face of the second integral stop member are separated by a first longitudinal distance, wherein the shuttle valve slider has a length equivalent to a second longitudinal distance, wherein the first longitudinal distance and the second longitudinal distance together define the first range of motion and the second range of motion.