Dual lumen surgical hand-piece with ultrasonic knife
A surgical hand piece has a solid surgical knife connected to a source of ultrasonic energy. Two or more rigid plastic irrigation and aspiration tubes are provided alongside the knife and they may be supported with respect to the knife by tube holders fastened to the hand piece housing for the source of ultrasonic energy. The rigid plastic tubes may be connected toward their distal ends by a support in the form of bands about the tubes and knife, a sleeve about the tubes and knife or a sleeve about the knife with the tubes supported on the external surface thereof.
1. A surgical hand piece comprising:
a solid knife connected to a source of ultrasonic energy, said knife being a blade that tapers to form a sharp forward cutting edge;
a housing for the ultrasonic energy source;
at least one rigid irrigation tube fastened by a tube holder to the exterior of the housing near the proximal end of the irrigation tube and said irrigation tube extends to a distal end thereof along and adjacent the solid knife; and
at least one rigid aspiration tube fastened by a tube holder to the exterior of the housing near the proximal end of the aspiration tube and said aspiration tube extends to a distal end thereof along and adjacent the solid knife.
2. The surgical hand piece according to claim 1 further including a support located only toward the distal ends of the irrigation and aspiration tubes for stabilizing the tubes with respect to each other.
3. The surgical hand piece according to claim 2 wherein the support is at least one band surrounding the tubes and attached to them.
4. The surgical hand piece according to claim 2 wherein the support is a sleeve surrounding the knife, said tubes being attached to an exterior surface of the sleeve.
5. The surgical hand piece according to claim 2 wherein the support is a sleeve surrounding the tubes and knife with the tubes being attached to the interior of the sleeve.
6. The surgical hand piece according to claim 2 further including an additional support for holding the tubes with respect to the knife, wherein the additional support reduces any transfer of vibration from the knife to the tubes.
7. The surgical hand piece according to claim 6 wherein the additional support is at least one O-ring.
8. The surgical hand piece according to claim 1 further including an additional rigid fluid tube fastened near its proximal end to the housing and extending to a distal end along and adjacent the solid knife.
9. The surgical hand piece according to claim 8 wherein the additional rigid fluid tube is an aspiration fluid tube.
10. The surgical hand piece according to claim 1 wherein, when using the hand piece for clean-up, the rigid irrigation and aspiration tubes can be slid toward the distal end so that the knife is less distal than the sleeves and cannot contact tissue.
11. The surgical hand piece according to claim 1 wherein the knife has a flat blade in top view with a sharp forward edge.
12. The surgical hand piece according to claim 1 wherein the knife has a flat blade in top view with a curved sharp forward edge.
13. The surgical hand piece according to claim 1 wherein the knife has a flat blade in top view with two sharp forward edges at an angle to each other.
14. The surgical hand piece according to claim 1 wherein the knife in top view has a semicircular sharp forward edge and an aperture toward its distal end with sharp edges, said distal end being offset from the rest of the blade.
15. The surgical hand piece according to claim 1 wherein the knife has a flat portion connected to another portion that is perpendicular to the flat portion, and upper edge of the perpendicular portion having a sharp cutting edge.
16. The surgical hand piece according to claim 1 wherein the knife has a half-tube shape with a sharp cutting edge at the distal end.
17. The surgical hand piece according to claim 1 wherein the distal ends of the tubes have openings of different sizes and/or shapes.
18. The surgical hand piece according to claim 17 wherein the opening at the distal end of an aspiration tube is on the side of the tube.
19. The surgical hand piece according to claim 1 wherein the tube holders include a housing portion that is fastened to the exterior of the housing and a gripping portion that forms a clamp for partially surrounding the tubes.
20. The surgical hand piece according to claim 19 wherein the knife has an enlarged hub at its proximal end and further including a flexible bag attached to the hub, surrounding the housing for the ultrasonic energy source and being retained in the clamp of the tube holders.
21. The surgical hand piece according to claim 20 wherein the bag, knife and tubes are sterile.
22. The surgical hand piece according to claim 20 wherein the bag, knife and tubes form a single use disposable unit.