Endoscopic cutting device

• US 20060184187A1
• Filed: 01/27/2006
• Published: 08/17/2006
• Est. Priority Date: 01/27/2005
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Wilson-Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Surti, Vihar C.
• Granted Patent: US 7,520,886 B2
• Time in Patent Office: Days
• US Class Current: 606/170
• CPC Class Codes: A61B 17/0467 Instruments for cutting sutures surgical cutting instruments A61B17/32
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2017/32004 having a laterally movable cutting member at its most distal end which remains within the contours of said end

Abstract

An endoscopic cutting device is disclosed. The device comprises an inner catheter including an inner wall having an opening formed therethrough. The inner wall further has a cutting blade moveably disposed thereon and biasingly extends through the opening. The inner wall has a receiving member disposed thereon and is configured to cooperatively receive the cutting blade. The device further comprises an outer catheter including an outer wall moveably disposed about the inner catheter. The outer wall has an aperture formed therethrough. The aperture is configured to moveably align with the opening of the inner wall for allowing the cutting blade to biasingly extend through the opening and biasingly engage the cutting blade with the receiving member to cut.

Claims

1. An endoscopic cutting device, the device comprising:

an inner catheter including an inner wall having an opening formed therethrough, the inner wall further having a cutting blade moveably disposed thereon and biasingly extending through the opening, the inner wall having a receiving member disposed thereon and being configured to cooperatively receive the cutting blade; and

an outer catheter including an outer wall moveably disposed about the inner catheter, the outer wall having an aperture formed therethrough, the aperture of the outer wall being configured to moveably align with the opening of the inner wall for allowing the cutting blade to biasingly extend through the opening and biasingly engage the cutting blade with the receiving member to cut.

2. The cutting device of claim 1 wherein the inner wall has a proximal portion and a distal portion, the opening being formed through the distal portion.

3. The cutting device of claim 2 wherein the distal portion has a closed distal end.

4. The cutting device of claim 1 further comprising a drive wire disposed on the distal portion of the inner wall for positioning the inner wall within the body of the patient.

5. The cutting device of claim 1 wherein the cutting blade is spring loaded to biasingly extend from the inner wall.

6. The cutting device of claim 1 wherein the outer wall has a proximal end and a distal end, the distal end being open to slidably move about the inner wall.

7. The cutting device of claim 1 wherein the outer wall is slidably disposed about the inner wall.

8. The cutting device of claim 1 wherein the receiving member is a receiving assembly having a base for receiving the cutting blade, the receiving assembly further having a receiving blade extending from the base and being configured to cooperate with the cutting blade for cutting.

9. The cuffing device of claim 8 wherein the inner wall further includes:

a spring mechanism having first and second arms, the first arm being attached to the inner wall and the second arm biasingly extending from the first arm and through the opening, the second arm biasingly moveable relative to the first arm, the receiving assembly being disposed on the first arm and attached to the inner wall, the cutting blade being disposed on the second arm and being moveable for cutting.

10. The cutting device of claim 9 wherein the second arm is biasingly pivotable about a cutting axis of the cutting blade, the cutting axis being defined by the spring.

11. The cutting device of claim 1 wherein the cutting blade comprises a cutting edge and a back edge opposite the cutting edge.

12. An endoscopic cutting device, the device comprising:

an inner catheter including an inner wall having a proximal portion and a closed distal portion, the distal portion having an opening formed therethrough, the inner wall further having a spring loaded cutting blade disposed thereon and biasingly extending through the opening, the cutting blade comprising a cutting edge and a back edge opposite the cutting edge, the inner wall having a receiving member disposed thereon and being configured to cooperatively receive the cutting edge of the cutting blade, the receiving member being a receiving assembly having a base for receiving the cutting edge of the cutting blade, the receiving assembly further having a receiving blade extending from the base and being configured to cooperate with the cutting blade for cutting with the cutting blade, a spring mechanism having first and second arms, the first arm being attached to the inner wall and the second arm biasingly extending from the first and through the opening, the second arm biasingly moveable relative to the first arm, the receiving assembly being disposed on the first arm and attached to the inner wall, the cutting blade being disposed on the second arm and being moveable for cutting with the cutting edge, the second arm is biasingly pivotable about a cutting axis of the cutting blade, the cutting axis being defined by the spring; and

an outer catheter including an outer wall having a proximal end and an open distal end, the outer wall being slidably disposed about the inner catheter, the outer wall having an aperture formed therethrough, the aperture of the outer wall being configured to align with the opening of the inner wall, allowing the cutting blade to biasingly extend therethrough and biasingly engage the receiving member to cut.

13. An endoscope apparatus having a cutting apparatus, the apparatus comprising:

an endoscopic assembly for endoscopy, the assembly comprising;

an insertion tube, the insertion tube having a plurality of channels through which endoscopic parts may be disposed; and

a control system in mechanical and fluid communication with the insertion tube, the control system being configured to control at least one of the endoscopic parts; and

an endoscopic cutting device disposed in one of the plurality of channels of the endoscopic assembly, the endoscopic cutting device comprising;

an inner catheter including an inner wall having a proximal portion and a closed distal portion, the distal portion having an opening formed therethrough, the inner wall further having a spring loaded cutting blade disposed thereon and biasingly extending through the opening, the inner wall having a receiving member disposed thereon and being configured to cooperatively receive the cutting blade; and

an outer catheter including an outer wall having a proximal end and an open distal end, the outer wall being slidably disposed about the inner catheter, the outer wall having an aperture formed therethrough, the aperture of the outer wall being configured to align with the opening of the inner wall, allowing the cutting blade to biasingly extend therethrough and biasingly engage the receiving member to cut.

14. The apparatus of claim 13 further comprising a drive wire disposed on the distal portion of the inner wall for positioning the inner catheter within the body of the patient.

15. The apparatus of claim 14 further comprising a handle assembly cooperable with the drive wire, the handle assembly including a spool disposed about the drive wire for movement of the drive wire therethrough and a handle proximally connected to the drive wire for facilitating movement of the drive wire while positioning the inner catheter within the body of the patient.

16. The apparatus of claim 13 wherein the receiving member of the device is a receiving assembly having a base for receiving the cutting blade, the receiving assembly further having a receiving blade extending from the base and being configured to cooperate with the cutting blade for cutting.

17. The apparatus of claim 16 wherein the inner wall of the device further includes:

a spring mechanism having first and second arms, the first arm being attached to the inner wall and the second arm biasingly extending from the first and through the opening, the second arm biasingly moveable relative to the first arm, the receiving assembly being disposed on the first arm and attached to the inner wall, the cutting blade being disposed on the second arm and being moveable for cutting.

18. The apparatus of claim 16 wherein the second arm of the device is biasingly pivotable about a cutting axis of the cutting blade, the cutting axis being defined by the spring.

19. The apparatus of claim 16 wherein the cutting blade of the device comprises a cutting edge and a back edge opposite the cutting edge.

20. The apparatus of claim 19 wherein the outer catheter engages the back edge of the cutting blade to move the cutting blade downwardly to biasingly engage with the receiving blade for closing the blade and cutting.