Electrosurgical knife
First Claim
1. An electrosurgical instrument for cooperation with a supply of electrical energy, said electrosurgical instrument of the type including a handle, one or more conductors coupling the power supply to the handle, and a knife blade for use in the hemostatic cutting of soft tissue, said cutting being accomplished through the transfer of electrical energy from the knife blade to a patient during surgery primarily through conduction, said knife blade comprising:
- a conductive substrate having a surface;
one or more coatings applied to at least a portion of the conductive substrate, at least one of said one or more coatings including a non-stick polymer agent substantially uniformly impregnated with a conductive agent; and
at least a portion of said at least one of said one or more coatings being coated with a top coating including a non-stick agent impregnated substantially uniformly with a conductive agent and a hardening agent.
2 Assignments
0 Petitions
Accused Products
Abstract
An electrosurgical knife is provided with an improved surface coating designed for substantially non-stick hemostatic cutting of soft patient tissue. The electrosurgical knife includes a conductive knife blade adapted for connection to a suitable high frequency current source for electrocauterizing tissue at the point of contact to prevent or minimize bleeding. The knife blade includes the improved surface coating formed on at least a cutting edge thereof, wherein the outer surface of the coating includes a relatively non-stick constituent such as an aromatic hydrocarbon in combination with a relatively hard ceramic constituent. The surface coating is additionally loaded with a substantially uniformly dispersed matrix of conductive material for transmitting the electrical energy to patient tissue primarily by conduction. In a preferred form, the surface coating may be applied to the knife blade in multiple layers, wherein each layer is loaded with the conductive material, and further wherein at least the outermost layer further includes the combined non-stick and ceramic constituents.
-
Citations
46 Claims
-
1. An electrosurgical instrument for cooperation with a supply of electrical energy, said electrosurgical instrument of the type including a handle, one or more conductors coupling the power supply to the handle, and a knife blade for use in the hemostatic cutting of soft tissue, said cutting being accomplished through the transfer of electrical energy from the knife blade to a patient during surgery primarily through conduction, said knife blade comprising:
-
a conductive substrate having a surface;
one or more coatings applied to at least a portion of the conductive substrate, at least one of said one or more coatings including a non-stick polymer agent substantially uniformly impregnated with a conductive agent; and
at least a portion of said at least one of said one or more coatings being coated with a top coating including a non-stick agent impregnated substantially uniformly with a conductive agent and a hardening agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A method of making an electrosurgical instrument for use in cooperation with a supply of electrical energy, said electrosurgical instrument of the type including a handle, one or more conductors coupling the power supply to the handle, and a knife blade having a conductive substrate, for use in the hemostatic cutting of soft tissue, said cutting being accomplished through the transfer of electrical energy from the knife blade to a patient during electrosurgical surgery primarily through conduction, said method comprising the steps of:
-
applying one or more coatings to at least a portion of the substrate, wherein at least one of the one or more coatings includes a non-stick polymer agent substantially uniformly impregnated with a conductive agent; and
applying a top coating including a non-stick agent loaded with a conductive agent and a hardening agent to at least a portion of the at least one of said one or more coatings which includes a nonstick agent substantially uniformly impregnated with a conductive agent. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
-
-
46. An electrosurgical instrument, comprising:
-
a conductive substrate; and
a surface coating applied to at least a portion of said substrate, said surface coating including a conductive agent, a non-stick agent and a ceramic agent.
-
Specification