Biopsy device with inner cutting member

• US 8,460,204 B2
• Filed: 06/03/2010
• Issued: 06/11/2013
• Est. Priority Date: 02/24/2003
• Status: Expired due to Term

• Current Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Original Assignee: Senorx Incorporated (Becton, Dickinson & Co)
• Inventors: Quick, Richard L., Louw, Frank R., Lubock, Paul, Shabaz, Martin V.
• Primary Examiner(s): Szmal, Brian
• Assistant Examiner(s): SMITH, FANGEMONIQUE A
• Application Number:
  US12/793,465
• Publication Number:
  US 20100262037A1
• Time in Patent Office: 1,104 Days
• Field of Search: 600/564, 600/565, 600/566, 606/180, 606/167, 606/159
• 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 10/0233 Pointed or sharp biopsy instruments
• CPC Class Codes: A61B 10/0266 means for severing sample
• 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 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• 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 2010/0208 Biopsy devices with actuators, e.g. with triggered spring mechanisms
• CPC Class Codes: A61B 2010/0225 for taking multiple samples
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/3405 using mechanical guide means
• CPC Class Codes: A61B 2017/3454 Details of tips
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61B 2090/309 using white LEDs
• CPC Class Codes: A61B 90/30 Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61M 1/77 Suction-irrigation systems aspiration tips supplying fluids A61M1/85; specific for negative pressure wound therapy A61M1/92; combined with tracheal tubes A61M16/0463
• CPC Class Codes: B23Q 17/2404 Arrangements for improving direct observation of the working space, e.g. using mirrors or lamps structural combinations of lighting devices with other articles, not otherwise provided for, F21V33/00
• CPC Class Codes: F21V 33/0068 Medical equipment

Abstract

The invention is directed to devices and methods for separating and collecting a tissue specimen from a patient'"'"'s target site. The device includes a probe member with a penetrating distal tip and a tissue receiving aperture, and a tissue cutting member which is rotatable disposed within the probe member to cut a tissue specimen drawn into the interior of the device through the aperture. The longitudinal edges of the aperture are preferably sharpened to engage the cutting edges of the tissue cutting member. Vacuum may be provided in the inner lumen of the cutting member to transport tissue therethrough. Rotation, rotational oscillation and/or longitudinal reciprocation of the tissue cutting member is effective to separate a tissue specimen from surrounding tissue. An accessing cannula having an tissue receiving aperture may be concentrically disposed within the probe member and about the tissue cutting member. The tissue cutting edge of the tissue cutting member preferably is longitudinally oriented and may have a cutting angle less than 90° with respect to the longitudinal axis of the tissue cutting member.

Claims

1. A tissue biopsy device for accessing and severing a tissue specimen from supporting tissue at a target site within a patient, comprising:

a. an elongated probe member which has a longitudinal axis, which has an inner lumen extending therein, which has a tissue penetrating distal tip and which has a tissue receiving aperture proximal to the tissue penetrating distal tip, the tissue receiving aperture being defined by a proximal closed end, a distal closed end, and longitudinal sides that extend between the proximal closed end and the distal closed end, the longitudinal sides being configured to define at least one longitudinally oriented tissue cutting edge; and

b. an elongated tissue cutting member which is disposed within the inner lumen of the elongated probe member and configured for cutting movements therein, which has a distal portion with a tissue cutting edge radially spaced from and is at least in part oriented at an acute cutting angle with respect to the at least one longitudinally oriented tissue cutting edge defining in part the aperture of the probe member and which is configured to be connected to at least one drive unit to oscillate and distally advance the tissue cutting member relative to the at least one longitudinally oriented tissue cutting edge to sever from supporting tissue a tissue specimen tissue extending into the tissue receiving aperture of the elongated probe member,

wherein the elongated tissue cutting member has a beveled distal tip having a pair of cutting edges, one cutting edge configured to engage a first cutting edge of the elongated probe member and a second cutting edge configured to engage a second cutting edge of the elongated probe member, and

wherein the beveled distal tip of the tissue cutting member has a longitudinally oriented slot which separates the tissue cutting edges of the tissue cutting member.

2. The biopsy device of claim 1 wherein the longitudinally oriented slot tapers in the proximal direction to smaller transverse dimensions.

3. The biopsy device of claim 1 wherein the distal portion of the tissue cutting member has a transversely oriented slot proximal to the beveled tip.