Sinus debrider apparatus

• US 5,685,838 A
• Filed: 04/17/1995
• Issued: 11/11/1997
• Est. Priority Date: 04/17/1995
• Status: Expired due to Term

• Current Assignee: Xomed Surgical Products, Inc. (Medtronic Plc)
• Original Assignee: Xomed-Treace, Inc.
• Inventors: Cleveland, John, Peters, Gary
• Primary Examiner(s): Green, Randall L.
• Assistant Examiner(s): VANOVER, PERRY
• Application Number:
  US08/422,903
• Time in Patent Office: 939 Days
• Field of Search: 604/22, 604/280, 604/27, 604/902, 606/167-171, 606/79, 606/177-180, 128/751-753, 128/754-755
• US Class Current: 604/22
• CPC Class Codes: A61B 17/32002 with continuously rotating, oscillating or reciprocating cutting instruments
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61B 2217/007 with irrigation system

Abstract

A sinus debrider apparatus comprising a housing, a motor mounted in the housing and a cutter head mounted to the housing. The cutter head frustum conical shaped and defines an interior chamber, a suction passageway and a fluid passageway. A blade holder is mounted to the head and axially aligned with the interior chamber with a blade member being rotatably mounted in the blade holder. A coupling member is mounted in the interior chamber and connects the motor and the blade member to transmit motion from the motor shaft to the blade member. A manifold member defining separate passageways communicates with the suction passageway and the fluid passageway of the head and forms a connection section to hold a flexible tube providing suction and fluid to the cutter head.

Claims

1. A hand held surgical cutting apparatus comprising a handpiece, motor means mounted in said handpiece, a cutter head mounted to said handpiece, said cutter head defining an interior chamber, a blade holder mounted to said cutter head and axially aligned with said interior chamber and a blade member moveably mounted in said blade holder, coupling means mounted in said head interior chamber connecting said motor means and said blade member to transmit motion from said motor means to said blade member, said head defining a separate suction passageway and a fluid passageway, a manifold member removably mounted to said head, said manifold member defining separate passageways communicating with said head suction passageway and fluid passageway, said manifold member being provided with a flexible tube mounted to said manifold member connection section providing suction and fluid flow to said manifold member and cutter head.

2. An apparatus as claimed in claim 1 wherein said cutter head has a frustum conical shape.

3. An apparatus as claimed in claim 1 wherein said handpiece defines an exterior channel on its outer surface which receives and holds said flexible tube means.

4. An apparatus as claimed in claim 3 wherein said handpiece further defines a projection which extends into said channel.

5. An apparatus as claimed in claim 4 wherein said projection is a nipple member.

6. An apparatus as claimed in claim 3 wherein said channel has rounded sidewalls of a greater width than said flexible tube means and an opening width that is less than said flexible tube width allowing said flexible tube means to be seated and held therein.

7. An apparatus as claimed in claim 1 wherein said flexible tube means is a flexible plastic tube with two separate lumens.

8. An apparatus as claimed in claim 7 wherein each of said lumens have a semicircular cross section and are separated by a wall.

9. An apparatus as claimed in claim 1 wherein said manifold member connection section is in the form of a tube intersected with a throughgoing slot.

10. An apparatus as claimed in claim 1 wherein said coupling means has a substantially linear shaped body defining an interior chamber and an axial passageway leading from one end of said body into said chamber, at least one wall of said chamber being beveled to direct fluid flow and tissue passing through said axial passageway which has been suctioned from a patient into the suction passageway of said manifold member.

11. An apparatus as claimed in claim 1 wherein said blade member is tubular with a partially spherical end and is mounted inside a tubular blade holder.

12. An apparatus as claimed in claim 11 wherein said tubular blade member has a tip portion flat cut at an 11 degree angle with respect the center axis of the tube member.

13. An apparatus as claimed in claim 1 wherein said manifold member has a connector end defining a slot into which said flexible tube means is mounted and extending tubular portion which can be mounted in said cutter head suction passageway and fluid passageway.

14. An apparatus as claimed in claim 1 wherein said blade member is tubular with a tip portion provided with pointed teeth having a crest extending above the center axis of the tubular member, each of said pointed teeth having rounded sidewalls.

15. An apparatus as claimed in claim 14 wherein said plurality of pointed teeth range from 7 to 9 in number.

16. A hand held surgical sinus cutting device comprising a housing also serving as a handle for the device, motor means mounted in said housing, a cutter head removably mounted to said housing, said cutter head defining an interior chamber, a blade holder mounted to said cutter head and axially aligned with said interior chamber and a tubular blade member rotatably mounted in said blade holder, coupling means mounted in said head interior chamber connect said motor means and said blade member to transmit motion from said motor means to said blade member, said head defines a separate suction passageway and a fluid passageway, a manifold member is removably mounted to said head, said manifold member defining separate passageways communicating with said head suction passageway and fluid passageway and being provided with a connection section to hold a double lumen flexible tube, said flexible tube when mounted to said manifold member connection section providing suction and fluid to said manifold member and cutter head and being seated in a groove formed along a substantial surface of the length of the housing.

17. A device as claimed in claim 16 wherein said blade member is tubular with a partially spherical end and is mounted inside a tubular blade holder.

18. A device as claimed in claim 17 wherein said tubular blade member has a tip portion flat cut at an 11 degree angle with respect the center axis of the tube member.

19. A device as claimed in claim 16 wherein said blade member is tubular with a tip portion provided with pointed teeth having a crest extending above the center axis of the tubular member, each of said pointed teeth having rounded sidewalls.

20. A hand held surgical sinus cutting instrument comprising a housing defining a central chamber and an exterior channel which receives and holds a flexible tube means, motor means mounted in said central chamber of said housing, a frustum conical shaped cutter head removably mounted to said housing via an interference fit, said cutter head defining an interior stepped chamber, a tubular blade holder mounted in said head and axially aligned within said interior chamber and a tubular blade member with a partially spherical end rotatably mounted inside said tubular blade holder, coupling means mounted in said head interior stepped chamber connecting said motor means and said tubular blade member to transmit motion from said motor means to said blade member, said coupling means comprising linear body with a arcuate cross section defining an interior chamber and an axial passageway leading from one end of said body into said chamber, a blade member mounted in said axial passageway, at least one wall defining said chamber being beveled to direct fluid flow and tissue passing through said blade member which has been suctioned from a patient during a medical procedure into the suction passageway of said manifold member, said head defining a suction passageway and a fluid passageway, a manifold member removably mounted to said head, said manifold member defining separate passageways communicating with said head suction passageway and fluid passageway and being provided with an end connection section and flexible tube means with plural separated lumens mounted to said manifold member end connection section to provide suction and fluid to said manifold member and cutter head.