Disposable biopsy unit

Patent metadata

Field	Value
Publication number	US-2016374650-A1
Application number	US-201615240427-A
Country	US
Kind code	A1
Filing date	Aug 18, 2016
Priority date	Mar 19, 2002
Publication date	Dec 29, 2016
Grant date	—

Abstract

A disposable biopsy unit includes a biopsy needle unit and a pump. The biopsy needle unit includes a carrier, a biopsy needle and a cutting sheath. The carrier is configured to mount the biopsy needle and the cutting sheath. The cutting sheath is configured to move along a longitudinal axis relative to the biopsy needle. The pump has an elongate cylinder and a plunger. The plunger is configured to be movable inside the elongate cylinder in a first direction from a distal end of the elongate cylinder to a proximal end of the elongate cylinder to generate a vacuum and configured to be movable inside the elongate cylinder in a second direction from the proximal end of the elongate cylinder to the distal end of the elongate cylinder to build up pressure. The distal end of the elongate cylinder is coupled in fluid communication with the biopsy needle.

First claim

1 - 20 . (canceled)

21 . A biopsy device, comprising:
a housing containing an electric power source and a tension slide, wherein the tension slide is configured to be moved to a cocked position against the action of a first spring; a releasable locking mechanism configured to lock the tension slide in the cocked position; and a removable element configured for insertion into the housing, the removable element having a cutting sheath configured to couple the electric power source to the tension slide, the electric power source configured to rotate the cutting sheath to move the tension slide to the cocked position.

22 . The biopsy device of claim 21 , further comprising a control panel attached to the housing, the control panel having a first control device configured to control the electric power source to rotate the cutting sheath to position the tension slide in the cocked position, and the control panel having a second control device configured to release the releasable locking mechanism when the tension slide is in the cocked position such that the tension slide is moved by the first spring away from the cocked position.

23 . The biopsy device of claim 21 , the removable element having a biopsy needle coaxial with the cutting sheath, and comprising a spacing piece positioned onto the biopsy needle and the cutting sheath to set a depth of penetration of the biopsy needle and the cutting sheath, wherein the depth of penetration is reduced by increasing a length of the spacing piece.

24 . The biopsy device of claim 21 , wherein the removable element includes a carrier configured to rotatably mount the cutting sheath, and wherein when the cutting sheath is rotated the cutting sheath is moved both longitudinally and rotationally relative to the carrier.

25 . The biopsy device of claim 21 , wherein the removable element includes a carrier, a biopsy needle, and the cutting sheath, the biopsy needle having a sample removal chamber, the carrier configured to mount the biopsy needle and the cutting sheath, the cutting sheath being rotatable relative to the carrier to effect a longitudinal movement of the cutting sheath along the longitudinal axis relative to the biopsy needle in a proximal direction to open a sample removal chamber of the biopsy needle, and the cutting sheath being rotatable relative to the carrier to effect a longitudinal movement of the cutting sheath along the longitudinal axis relative to the biopsy needle in a distal direction to close the sample removal chamber of the biopsy needle.

26 . The biopsy device of claim 25 , the removable element including a pump having an elongate cylinder and a plunger, the pump being coupled in fluid communication with the sample removal chamber.

27 . The biopsy device of claim 25 , the removable element including a pump to build up pressure at the sample removal chamber when the sample removal chamber is closed.

28 . The biopsy device of claim 27 , the electric power source configured to move the cutting sheath in the proximal direction across the sample removal chamber to release the pressure from the sample removal chamber.

29 . The biopsy device of claim 21 , the removable element including a pump and a sample removal chamber, the pump having an elongate cylinder and a plunger, the pump being coupled in fluid communication with the sample removal chamber, the pump configured such that moving the plunger inside the elongate cylinder in a first direction generates a vacuum at the sample removal chamber and moving the plunger inside the elongate cylinder in a second direction opposite the first direction builds pressure at the sample removal chamber.

30 . The biopsy device of claim 21 , the removable element having a biopsy needle and a knob, the biopsy needle having a sample removal chamber, the knob being coupled to the biopsy needle, wherein a manual rotation of the knob results in a positioning of the sample removal chamber at a selected rotational position.

31 . The biopsy device of claim 21 , wherein the removable element includes a biopsy needle coaxial with the cutting sheath, and the removable element includes a carrier for mounting the biopsy needle and the cutting sheath, the removable element including a plastic part having a polygonal portion that is mounted to a proximal end of the biopsy needle, wherein an interaction between the polygonal portion and the carrier during a rotation of the biopsy needle intermittently resists rotation of the biopsy needle.

32 . A biopsy device, comprising:
a housing containing an electric power source and a tension slide, wherein the tension slide is configured to be moved to a cocked position against the action of a first spring; a releasable locking mechanism configured to lock the tension slide in the cocked position; a removable element configured for insertion into the housing, the removable element having a biopsy needle and a cutting sheath, the cutting sheath configured to couple the electric power source to the tension slide, the electric power source configured to rotate the cutting sheath to move the tension slide to the cocked position; a first control device configured to control the electric power source to rotate the cutting sheath to position the tension slide in the cocked position; and a second control device configured to release the releasable locking mechanism when the tension slide is in the cocked position such that the tension slide is moved by the first spring away from the cocked position.

33 . The biopsy device of claim 32 , wherein the removable element includes a carrier configured to rotatably mount the cutting sheath, and wherein when the cutting sheath is rotated the cutting sheath is moved both longitudinally and rotationally relative to the carrier.

34 . The biopsy device of claim 33 , the cutting sheath being rotatable relative to the carrier to effect a longitudinal movement of the cutting sheath relative to the biopsy needle in a proximal direction to open a sample removal chamber of the biopsy needle, and the cutting sheath being rotatable relative to the carrier to effect a longitudinal movement of the cutting sheath along the longitudinal axis relative to the biopsy needle in a distal direction to close the sample removal chamber of the biopsy needle.

35 . The biopsy device of claim 32 , the removable element including a sample removal chamber and a pump, the pump being coupled in fluid communication with the sample removal chamber.

36 . The biopsy device of claim 32 , the removable element including a sample removal chamber that is selectively opened and closed by a corresponding longitudinal movement of the cutting sheath, the removable element including a pump to build up pressure at the sample removal when the sample removal chamber is closed.

37 . The biopsy device of claim 36 , the electric power source configured move the cutting sheath in a proximal direction across the sample removal chamber to release the pressure from the sample removal chamber.

38 . The biopsy device of claim 32 , the removable element including a pump having an elongate cylinder and a plunger, the pump being coupled in fluid communication with a portion of the removable element that includes a sample removal chamber, the pump configured such that moving the plunger inside the elongate cylinder in a first direction generates a vacuum at the sample removal chamber and moving the plunger inside the elongate cylinder in a second direction opposite the first direction builds pressure at the sample removal chamber.

Assignees

• Bard Inc C R
• Bard Inc C R

Inventors

• Heske Norbert
• Heske Thomas

Classifications

• A61B90/03

  Automatic limiting or abutting means, e.g. for safety · CPC title

• A61B10/0283 Primary

  with vacuum aspiration, e.g. caused by retractable plunger or by connected syringe (A61B10/025, A61B10/0266 take precedence) · CPC title

• A61B10/0275

  with sample notch, e.g. on the side of inner stylet · CPC title

• G01N1/08

  involving an extracting tool, e.g. core bit · CPC title

• A61B2090/036

  abutting on tissue or skin · CPC title