Micro-invasive device

• US 7,591,790 B2
• Filed: 07/30/2007
• Issued: 09/22/2009
• Est. Priority Date: 03/23/2001
• Status: Expired due to Fees

• Current Assignee: Stryker Puerto Rico Holdings BV (Stryker Corporation)
• Original Assignee: Stryker Puerto Rico Limited (Stryker Corporation)
• Inventors: Pflueger, D. Russell
• Primary Examiner(s): Hindenburg; Max
• Assistant Examiner(s): SZMAL, BRIAN SCOTT
• Application Number:
  US11/888,321
• Publication Number:
  US 20080064984A1
• Time in Patent Office: 785 Days
• Field of Search: 600562-570, 606/80, 606/185, 606/170, 606/172, 606/102, 606/167, 606/180, 604/35, 60416401-16413, 604/187, 604/218, 604/27, 604/540, 604/151, 604/131, 415/73, 298/89
• US Class Current: 600/568
• 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 10/0266 means for severing sample
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2010/0225 for taking multiple samples
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/00685 Archimedes screw
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/008 Removal of tumors

Abstract

An apparatus for removing tissue and/or other material from a patient, particularly a breast of a patient, is provided. The apparatus generally includes a handpiece and a tissue removal mechanism connected thereto. The tissue removal mechanism includes a cannula having an open distal tip and an outer diameter of less than about 5 mm, or less than about 2 mm. The mechanism further includes a rotatable element having a distal portion with helical threading. The distal portion of the rotatable element extends beyond the open distal tip of the cannula in order to allow tissue to prolapse between turns of the helical threading. The apparatus is designed to draw soft tissue into the cannula upon rotation of the rotatable element and without the need for supplemental sources of aspiration.

Claims

1. A self-contained apparatus for removing a gelatinous substance from a target area of a human body, the apparatus comprising:

a handpiece;

a source of rotational energy;

a cannula including a proximal end portion structured to be coupled to the handpiece and an open distal tip adapted to be placed in the target area of the human body prior to the proximal end portion being coupled to the handpiece;

a rotational element structured to be operatively coupled to the source of rotational energy, the rotational element disposed at least partially in the cannula, wherein the apparatus is structured so that the rotational element and the cannula cooperatively engage to form a source of suction effective in drawing a gelatinous substance from the target area of the human body into the cannula in response to rotation of the rotational element; and

the apparatus including no external source of suction and being structured to be self-contained.

2. The self-contained apparatus of claim 1, wherein the handpiece is sized and contoured to fit comfortably within a palm of a surgeon.

3. The self-contained apparatus of claim 1, wherein the cannula is sized and structured to be rigid and manually deformable.

4. The self-contained apparatus of claim 3, wherein the cannula and the rotational element are manually deformable into a desired curved shape.

5. The self-contained apparatus of claim 1, wherein the source of rotational energy comprises a motor.

6. The self-contained apparatus of claim 1, wherein the cannula has an outer diameter no greater than about 5 mm.

7. The self-contained apparatus of claim 1, wherein the rotational element is structured to rotate at a sufficiently high speed to cause the gelatinous substance from the target area of a human body to be pulled proximally into the cannula.

8. The self-contained apparatus of claim 1, wherein the source of rotational energy is a source of battery-powered rotational energy.

9. The self-contained apparatus of claim 8 which further comprises a battery coupled to and effective to provide power to the source of battery-powered rotational energy.

10. A self-contained apparatus for removing a gelatinous substance from a target area of a human body, the apparatus comprising:

a handpiece;

a source of rotational energy;

a cannula including a proximal end portion structured to be coupled to the handpiece and an open distal tip adapted to be placed in the target area of the human body;

a rotational element structured to be introduced into the cannula and the target area of the human body after the open distal tip is placed in the target area of the human body and to be operatively coupled to the source of rotational energy, wherein the apparatus is structured so that the cannula and the rotational element disposed at least partially in the cannula cooperatively engage to form a source of suction effective in drawing a gelatinous substance from the target area of the human body into the cannula in response to rotation of the rotational element; and

the apparatus including no external source of suction and being structured to be self-contained.

11. The self-contained apparatus of claim 10, wherein the source of rotational energy comprises a motor.

12. The self-contained apparatus of claim 10, wherein the cannula has an outer diameter no greater than about 5 mm.

13. The self-contained apparatus of claim 10, wherein the rotational element is structured to rotate at a sufficiently high speed to cause the gelatinous substance from the target area of a human body to be pulled proximally into the cannula.

14. The self-contained apparatus of claim 10, wherein the source of rotational energy is a source of battery-powered rotational energy.

15. The self-contained apparatus of claim 14 which further comprises a battery coupled to and effective to provide power to the source of battery-powered rotational energy.

16. A self-contained apparatus for removing a gelatinous substance from a target area of a human body, the apparatus comprising:

a handpiece;

a source of rotational energy;

a cannula including a proximal end portion structured to be coupled to the handpiece and an open distal tip adapted to be placed in the target area of the human body;

a rotational element structured to be operatively coupled to the source of rotational energy, the rotational element disposed at least partially in the cannula and extending beyond the distal tip of the cannula, wherein the apparatus is structured so that the rotational element and the cannula form a source of suction effective in drawing a gelatinous substance from the target area of the human body into the cannula in response to rotation of the rotational element; and

the apparatus including no external source of suction.

17. The self-contained apparatus of claim 16, wherein the rotational element is structured to rotate at a sufficiently high speed to cause the gelatinous substance from the target area of the human body to be pulled proximally into the cannula.