Core needle biopsy device for collecting multiple samples in a single insertion

Inventors: Andrew Paul Nock (Dayton, OH); David C. McBreen (West Chester, OH); Justin Rebellino (Cincinnati, OH)

Assignee: Devicor Medical Products, Inc.

A61B10/0275 A61B2010/0208

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Quick Facts

Patent No.: US 12667345
App. No.: 17/729,453
Granted: Jun 30, 2026
Kind: B2

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Abstract

A core needle biopsy device includes a needle assembly, a cutter drive assembly, a piercer drive assembly and an actuation mechanism. The needle assembly includes a piercer and a hollow cutter. The piercer includes a sharp distal tip and a notch proximal to the distal tip. The piercer is slidably disposed within the cutter to sever a tissue sample into the notch. The cutter drive assembly is configured to move the cutter. The piercer drive assembly is configured to move the piercer. The piercer drive assembly includes a lead screw configured to move both a portion of the cutter drive assembly and a portion of the piercer drive assembly. The actuation mechanism is configured to engage bot the cutter drive assembly and the piercer drive assembly to initiate firing of the piercer and the cutter sequentially using the cut drive assembly and the piercer drive assembly.

Claims (26)

1 . A core needle biopsy device, comprising:

(a) a needle assembly including a piercer and a hollow cutter, the piercer including a sharp distal tip and a notch proximal to the distal tip, the piercer being slidably disposed within the cutter to thereby collectively be configured to sever a tissue sample into the notch of the piercer;

(b) a cutter drive assembly configured to move the cutter;

(c) a piercer drive assembly configured to move the piercer, the piercer drive assembly including a lead screw, the lead screw being configured to move both a portion of the cutter drive assembly and a portion of the piercer drive assembly, the lead screw of the piercer drive assembly including an outer lead screw, the cutter drive assembly including an inner lead screw, the outer lead screw of the piercer drive assembly being configured to threadably receive the inner lead screw of the cutter drive assembly, the piercer drive assembly further comprising a latch mechanism, the latch mechanism being configured to selectively release from a portion of the piercer drive assembly to permit translation of the outer lead screw; and

(d) an actuation mechanism configured to engage both the cutter drive assembly and the piercer drive assembly to initiate firing of the piercer and the cutter sequentially using the cutter drive assembly and the piercer drive assembly.

2 . The core needle biopsy device of claim 1 , the piercer drive assembly including a drive shaft configured to rotate the outer lead screw, the outer lead screw being configured to translate relative to the drive shaft to fire the piercer.

3 . The core needle biopsy device of claim 1 , the outer lead screw including a first threaded portion and a second threaded portion, the first threaded portion including threads having a first pitch, the second threaded portion including threads having a second pitch, the first pitch being different relative to the second pitch.

4 . The core needle biopsy device of claim 3 , the first threaded portion being configured to engage the cutter drive assembly, the second threaded portion being configured to engage a piercer carriage coupled to the piercer.

5 . The core needle biopsy device of claim 1 , rotation of the outer lead screw relative to the inner lead screw being configured to simultaneously compress a cutter spring and a piercer spring.

6 . The core needle biopsy device of claim 5 , the inner lead screw being configured to compress the piercer spring within a hollow interior of the outer lead screw between a proximal end of the inner lead screw and a portion of the piercer drive assembly disposed within the outer lead screw.

7 . The core needle biopsy device of claim 1 , the cutter drive assembly including a cutter carriage coupled to the cutter, the inner lead screw being configured to translate the cutter via the cutter carriage.

8 . The core needle biopsy device of claim 1 , the latch mechanism being axially secured to the outer lead screw such that the latch mechanism is configured to translate with the outer lead screw.

9 . The core needle biopsy device of claim 1 , the actuation mechanism including an elongate shaft, the elongate shaft defining a latch portion and a release portion, the latch portion being configured to actuate the latch mechanism to selectively fire the piercer using the outer lead screw, the release portion being configured to engage a portion of the cutter drive assembly to selectively fire the cutter.

10 . The core needle biopsy device of claim 9 , the actuation mechanism further including a tissue manipulation portion, a portion of the tissue manipulation portion being configured to manipulate tissue into a tissue chamber from the notch of the piercer.

11 . The core needle biopsy device of claim 9 , the latch portion including a protrusion configured to drive rotation of the latch mechanism, the release portion including a pair of wings.

12 . The core needle biopsy device of claim 1 , at least a portion of the piercer drive assembly being driven by a motor.

13 . The core needle biopsy device of claim 1 , the piercer drive assembly being configured to retract at least a portion of the cutter drive assembly when retracting the piercer.

14 . The core needle biopsy device of claim 1 , the outer lead screw being further configured to move the distal tip distal to the hollow cutter.

15 . A core needle biopsy device, comprising:

(b) a cutter drive assembly configured to move the cutter; (b)

(c) a piercer drive assembly configured to move the piercer, the piercer drive assembly including a lead screw having a longitudinal axis laterally offset from the piercer, the lead screw including a first external thread configured to move a portion of the cutter drive assembly, the lead screw including a second external thread configured to move a portion of the piercer drive assembly, the first and second external threads being separate and discrete from one another; and

(d) an actuation assembly configured to engage both the cutter drive assembly and the piercer drive assembly to initiate firing of the piercer and the cutter sequentially using the cutter drive assembly and the piercer drive assembly.

16 . The core needle biopsy device of claim 15 , the piercer drive assembly further including a drive shaft configured to rotate the lead screw, the lead screw being configured to translate relative to the drive shaft to fire the piercer.

17 . The core needle biopsy device of claim 15 , the first external thread threaded portion including threads having a first pitch, the second external thread having a second pitch, the first pitch being different relative to the second pitch.

18 . The core needle biopsy device of claim 17 , the first external thread being configured to engage the cutter drive assembly, the second external thread being configured to engage a piercer carriage coupled to the piercer.