Surgical cutting apparatus

• US 5,873,886 A
• Filed: 02/18/1997
• Issued: 02/23/1999
• Est. Priority Date: 04/04/1995
• Status: Expired due to Term

• Current Assignee: United States Surgical Corporation (Medtronic Plc)
• Original Assignee: United States Surgical Corporation (Medtronic Plc)
• Inventors: Shikhman, Oleg, Larsen, Scott W., McDonnell, Christopher
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): Shai, Daphna
• Application Number:
  US08/802,890
• Time in Patent Office: 735 Days
• Field of Search: 606/170, 606/171, 606/180, 606/172, 606/173, 606/167, 606/159
• US Class Current: 606/180
• CPC Class Codes: A61B 10/0275 with sample notch, e.g. on the side of inner stylet
• CPC Class Codes: A61B 10/04 Endoscopic instruments
• CPC Class Codes: A61B 10/06 Biopsy forceps , e.g. with cup-shaped jaws
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1611 the two jaw elements being integral with respective elongate shaft elements
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• 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 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2017/293 with means preventing relative rotation between the shaft and the actuating rod
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable

Abstract

A surgical apparatus for cutting and storing sections of body tissue is provided comprising a housing having a handle assembly, an elongated outer tube extending from the handle assembly, and a cutting tube positioned within the outer tube and movable in response to actuation of the handle assembly between a retracted position and a distal position to cut body tissue. The cutting tube has a chamber formed therein for storing the cut tissue sections. An anvil is positioned at a distal end of the outer tube for forcing each cut tissue section proximally into the chamber of the cutting tube as the cutting tube is advanced to cut the body tissue.

Claims

1. A surgical apparatus for cutting and storing sections of body tissue comprising:

a housing having a handle assembly;

an elongated outer tube extending from the handle assembly and having an opening in an outer wall portion thereof defining a window for reception of body tissue;

a cutting tube positioned within the outer tube and movable in response to activation of the handle assembly between a proximal position and a distal position to sever body tissue, the cutting tube having a chamber formed therein for storing tissue sections severed thereby and defining a distal cutting end the distal cutting end being open,

a rotatable collar operatively associated with the outer tube and rotatably mounted to the housing, the rotatable collar rotatable to cause corresponding rotational movement of the outer tube to thereby selectively position the window at predetermined angular positions for reception of the body tissue; and

an anvil positioned at a distal end portion of the outer tube and disposed adjacent to the window, the anvil dimensioned to be at least partially received within the distal cutting end of the cutting tube when the cutting tube is in the distal position thereof wherein the body tissue received within the window of the outer tube is supported by the anvil and at least severed through the cooperative interaction of the distal cutting end of the cutting tube and the anvil, the anvil further configured for engaging and forcing severed tissue sections proximally into the chamber of the cutting tube during movement of the cutting tube.

2. The apparatus of claim 1, wherein the outer tube and cutting tube are removably connected to the housing.

3. The apparatus of claim 2, wherein the cutting tube is removably mounted in the outer tube.

4. The apparatus of claim 1, wherein the rotatable collar is mounted to the housing and the outer tube and the cutting tube are detachably mounted to the rotatable collar.

5. The apparatus of claim 4, further comprising a tube support mounted within the collar and having a central bore for receiving the outer tube and a circumferential groove for receiving a C-clip, the C-clip frictionally and releasably connecting the tube support to the collar.

6. The apparatus of claim 1, wherein the distal cutting end of the cutting tube includes a plurality of teeth.

7. The apparatus of claim 1, wherein the cutting tube includes a notch adjacent the distal end to facilitate retention of tissue in the chamber formed therein.

8. The apparatus of claim 1, wherein the anvil is positioned distally of the window in the outer tube.

9. The apparatus of claim 8, wherein the anvil includes an enlarged head portion and a cylindrical portion of reduced diameter, the cylindrical portion entering an axial bore formed in the cutting tube upon movement of the cutting tube to the distal position to thereby force the severed tissue sections proximally within the cutting tube.

10. The apparatus of claim 1, wherein the cutting tube rotates as it is advanced distally.

11. The apparatus of claim 10, further comprising a helical groove formed in the rotatable collar and a drive pin extending from the cutting tube, wherein the drive pin rides in the helical groove during advancement of the cutting tube to effect rotation of the cutting tube.

12. The apparatus of claim 11, wherein the distal cutting end of the cutting tube has a plurality of teeth.

13. A surgical apparatus for cutting and storing tissue comprising:

a housing including a handle assembly and a mounting collar, the mounting collar having structure for releasable attachment to the handle assembly;

an elongated body portion extending from the housing and connected to the mounting collar, such that removal of the mounting collar from the housing removes the elongated body portion;

a cutting tube slidably positioned within the elongated body portion for movement upon actuation of the handle assembly from a proximal position to a distal position to cut body tissue, the cutting tube having an open distal end; and

a tissue engaging member fixedly positioned at a distal end portion of the elongated body portion, the tissue engaging member having an engaging surface, the engaging surface being received within the open distal end of the cutting tube when the cutting tube in the distal position thereof to at least support the body tissue to facilitate cutting there of by the cutting tube, and being configured for engaging and forcing body tissue sections cut by the cutting tube proximally through the open distal end and within the cutting tube.

14. The apparatus of claim 13, further comprising a flexible clasping member for releasably mounting the mounting collar to the housing, wherein movement of the clasping member from a first position to a second position releases the mounting collar from the housing.

15. The apparatus of claim 14, wherein removal of the collar from the housing removes the elongated body portion and the cutting tube.

16. The apparatus of claim 15, wherein the cutting tube is removably mounted in the elongated body portion to allow release thereof when the elongated body portion is disengaged from the housing.

17. The apparatus of claim 16, wherein the body portion has an opening at a proximal end to allow removal of the cutting tube.

18. The apparatus of claim 14, wherein the clasping member includes at least one projection extending though an opening in the collar assembly.

19. A surgical apparatus for cutting and storing sections of body tissue, which comprises:

a handle including a pistol grip having a depending stationary grip portion and a depending movable grip portion;

an endoscopic portion including;

an elongated outer tube extending from the handle and having an opening defined in an outer wall portion thereof defining a window for reception of tissue;

a cutting tube disposed within the outer tube and operatively connected to the movable grip portion, the cutting tube distally advanceable to a cutting position thereof in response to movement of the movable grip portion and having a distal cutting edge to sever tissue received within the window of the outer tube, the cutting tube having a longitudinal bore defining a chamber therein for accommodating severed tissue sections; and

a tissue engaging member disposed at a distal end portion of the outer tube adjacent the window, the tissue engaging member defining an inner tissue engaging surface dimensioned and configured to e at least partially received within the internal chamber upon movement of the cutting tube to cutting position thereof and to thereby support the tissue received within the window to facilitate severing thereof and to subsequently engage and force the severed tissue sections proximally within the chamber; and

a rotatable collar operatively associated with the cutting tube and rotatably mounted to the housing, the rotatable collar rotatable to cause corresponding rotational movement of the cutting tube to thereby selectively position the window at predetermined angular positions for reception of the body tissue.

20. The surgical apparatus according to claim 19 wherein the opening in the outer wall portion is defined by a blunt edge.

21. A surgical apparatus for cutting and storing tissues which comprises:

a housing having an actuating member;

an elongated outer tube extending from the housing and having an opening in an outer wall portion thereof defining a window for reception of body tissue;

a cutting tube positioned within the outer tube and movable in response to actuation of the actuating member between a proximal position and a distal position to sever body tissue, the cutting tube having an inner chamber for storing tissue sections severed thereby;

a rotatable collar rotatablvy mounted to the housing and defining a longitudinal bore for receiving at least a portion of the cutting tube;

a clasping member mounted to the rotatable collar and operatively engageable with the outer tube, the clasping member moveable between an engaged position wherein the rotatable collar and the outer tube are in operative engagement such that rotational movement of the rotatable collar causes corresponding rotational movement of the outer tube to thereby selectively position the window of the outer tube at predetermined angular orientations, and a disengaged position wherein the clasping member is operatively disengaged from the outer tube to permit the outer tube to be disassembled from the rotatable collar; and

a manually engagable member associated with the clasping member and extending beyond the rotatable collar, to be accessed by a user, the manually engagable member movable to at least move the clasping member to the disengaged position thereof.