US20230346456A1 - Electrosurgical blade with minimally exposed edge, alternative to coated blade - Google Patents
Electrosurgical blade with minimally exposed edge, alternative to coated blade Download PDFInfo
- Publication number
- US20230346456A1 US20230346456A1 US18/219,461 US202318219461A US2023346456A1 US 20230346456 A1 US20230346456 A1 US 20230346456A1 US 202318219461 A US202318219461 A US 202318219461A US 2023346456 A1 US2023346456 A1 US 2023346456A1
- Authority
- US
- United States
- Prior art keywords
- conductive
- face
- cutting element
- elongate
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005476 soldering Methods 0.000 claims description 13
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 5
- 229910001020 Au alloy Inorganic materials 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000003353 gold alloy Substances 0.000 claims description 4
- 229910052726 zirconium Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 16
- 239000004020 conductor Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 4
- 230000037361 pathway Effects 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002224 dissection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000023597 hemostasis Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000451 tissue damage Effects 0.000 description 1
- 231100000827 tissue damage Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00946—Material properties malleable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00059—Material properties
- A61B2018/00071—Electrical conductivity
- A61B2018/00077—Electrical conductivity high, i.e. electrically conducting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00059—Material properties
- A61B2018/00071—Electrical conductivity
- A61B2018/00083—Electrical conductivity low, i.e. electrically insulating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00107—Coatings on the energy applicator
- A61B2018/00148—Coatings on the energy applicator with metal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00601—Cutting
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00607—Coagulation and cutting with the same instrument
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/1206—Generators therefor
- A61B2018/1246—Generators therefor characterised by the output polarity
- A61B2018/1253—Generators therefor characterised by the output polarity monopolar
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1412—Blade
Definitions
- This present invention relates to electrosurgical devices, and in particular, monopolar radiofrequency electrosurgical devices.
- Monopolar electrosurgical devices are surgical devices that are configured to dissect tissue with radiofrequency energy as opposed to dissection of tissue with a traditional scalpel.
- One of the main benefits of such devices are precision dissection on par with that of scalpel while providing the bleeding control capability of traditional electrosurgery with minimal thermal injury to collateral tissue. This results in a highly efficient cut that requires less power to operate and improves patient outcomes by reducing collateral tissue damage.
- some monopolar electrosurgical devices are manufactured by including a conductive substrate, such as an electrode, that is coated with a glass-based insulator material.
- the resulting cutting tip includes minimally exposed conductive edge that is in the range of 1 to 100 microns in width. Therefore, approximately greater than 99% of the cutting tip is insulated and less than 1% is exposed. This minimally exposed edge enables the focused energy to be delivered only at the exposed edge, while the remainder of the tip is insulated and kept at a relatively low temperature. The end result is precision cutting with minimal collateral damage.
- this method of manufacture requires an expensive glass-coating process, potential for manufacturing efficiency, and reduction in reliance on highly custom materials.
- the cutting element includes an elongate non-conductive body having a first face opposite a second face, the first face and the second face defining an edge there between.
- a conductive element is disposed only along the edge, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
- the edge is a chamfered edge.
- first face and the second face are substantially flat.
- the conductive element is composed of one from the group consisting of silver alloy and gold alloy.
- the elongate non-conductive body is composed of Zirconium toughened Alumina.
- the elongate non-conductive body includes a proximal end and a distal end, and wherein the distal end is curved.
- the conductive element is etched onto the elongate non-conductive body.
- the elongate non-conductive body defines a perimeter and wherein the conductive element is disposed around the perimeter.
- the elongate non-conductive body includes a soldered conductor on the first face, the conductor being configured to electrically couple the conductive element to a shaft of the electrosurgical device.
- the cutting element is configured to be coupled to an elongate shaft, and wherein the elongate shaft is coupled to a handle of the electrosurgical device.
- a cutting element for an electrosurgical device in another embodiment, includes an elongate non-conductive body having a first face opposite a second face and defining a major longitudinal axis, the first face and the second face defining a double chamfered edge there between.
- a conductive element is disposed only along the double chamfered edge, the conductive element being substantially perpendicular to the major elongate axis, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
- the conductive element is one from the group consisting of gold alloy ink and silver alloy ink printed on the double chamfered edge.
- first face and the second face are substantially flat.
- the elongate non-conductive body is composed of Zirconium toughened Alumina.
- the elongate non-conductive body includes a proximal end and a distal end, and wherein the distal end is curved.
- the elongate non-conductive body defines a perimeter and wherein the conductive element is disposed around substantially the entirety of the perimeter.
- the elongate non-conductive body includes a soldered conductor on the first face, the conductor being configured to electrically couple the conductive element to a shaft of the electrosurgical device.
- the cutting element is configured to be coupled to an elongate shaft, and wherein the elongate shaft is coupled to a handle of the electrosurgical device.
- the conductive element is disposed along a midpoint of a width of the conductive element.
- an electrosurgical device in another embodiment, includes a handle.
- An elongate shaft extends from the handle, the elongate shaft defines a proximal end coupled to the handle and a distal end.
- a cutting element is coupled to the distal end of the shaft, the cutting element includes a flat and elongate non-conductive body having a first face opposite a second face and defines a major longitudinal axis, the first face and the second face define a double chamfered edge there between, the non-conductive body defines a proximal end coupled to the elongate shaft and an arcuate distal end.
- a conductive element composed of a silver alloy is printed only along the double chamfered edge, the conductive element being substantially perpendicular to the major elongate axis, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
- FIG. 1 is a system view of an electrosurgical unit and electrosurgical device constructed in accordance with the principles of the present application;
- FIG. 2 is a perspective view of the cutting element of the electrosurgical device shown in FIG. 1 ;
- FIG. 3 is a side view of the cutting element shown in FIG. 2 ;
- FIG. 4 is a top view of the cutting element shown in FIG. 3 ;
- FIG. 5 is a bottom view of the cutting element shown in FIG. 4 .
- relational terms such as “first” and “second,” “top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
- relational terms such as “first” and “second,” “top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
- the ESU 10 may include a radiofrequency generator 12 configured to house and electrically couple the components and circuits of the ESU 10 and a touch actuated display 14 configured to receive energy requests from one or more electrosurgical hand pieces that electrically couple to the radiofrequency generator 12 , display treatment progress and measurements, for example, impedance, and initiate and/or terminate the supply of radiofrequency energy and fluid with one or more electrosurgical hand pieces that may be electrically coupled to the ESU 10 .
- a radiofrequency generator 12 configured to house and electrically couple the components and circuits of the ESU 10
- a touch actuated display 14 configured to receive energy requests from one or more electrosurgical hand pieces that electrically couple to the radiofrequency generator 12 , display treatment progress and measurements, for example, impedance, and initiate and/or terminate the supply of radiofrequency energy and fluid with one or more electrosurgical hand pieces that may be electrically coupled to the ESU 10 .
- the ESU 10 includes a first receptacle 16 , which may be a 3-pin connector configured to receive and electrically couple with a bipolar electrosurgical hand piece (not shown) configured to deliver bipolar radiofrequency energy to tissue.
- the ESU 10 may further include a second receptacle 18 , for example, a 7-pin receptacle, configured to receive and electrically couple with an electrosurgical hand piece 20 configured to deliver at least one of monopolar radiofrequency energy or a combination of bipolar radiofrequency energy and monopolar radiofrequency energy. Additional details about an exemplary ESU 10 of the present application may found in U.S. patent application Ser. No. 14/927,999, filed Oct.
- the ESU 10 may include a single receptacle configured to deliver one or both of monopolar and bipolar radiofrequency energy to which the bipolar electrosurgical hand piece or the electrosurgical hand piece 20 may couple with.
- the electrosurgical hand piece 20 may include a handle 22 which couples to the second receptacle 18 and includes a first actuator 24 configured to initiate operation of the hand piece 20 in CUT mode, a second actuator 26 configured to initiate operation of the hand piece 20 in COAG mode, and a third actuator 28 configured to initiate operation of the hand piece 20 in TRANS mode.
- a handle 22 which couples to the second receptacle 18 and includes a first actuator 24 configured to initiate operation of the hand piece 20 in CUT mode, a second actuator 26 configured to initiate operation of the hand piece 20 in COAG mode, and a third actuator 28 configured to initiate operation of the hand piece 20 in TRANS mode.
- a first actuator 24 configured to initiate operation of the hand piece 20 in CUT mode
- a second actuator 26 configured to initiate operation of the hand piece 20 in COAG mode
- a third actuator 28 configured to initiate operation of the hand piece 20 in TRANS mode.
- CUT mode operates the hand piece 20 to dissect and/or resect tissue
- COAG mode operates the hand piece 20 to coagulate tissue for hemostasis
- TRANS mode operates the hand piece 20 to coagulate tissue while releasing a fluid.
- Extending distally from the handle 22 may be an elongate shaft 30 defining a proximal end 32 , a distal end 34 , and a lumen 36 there between.
- the proximal end 32 of the shaft 30 may be coupled to the distal end of the handle 22 .
- one or more conductors may extend through the handle 22 and connect to the shaft 30 or extend through the lumen 36 toward the distal end 34 of the shaft 30 to electrically connect the ESU 10 with the hand piece 20 when the hand piece 20 is coupled to the second receptacle 18 .
- the shaft 30 may be composed of an electrically conductive material, such as stainless steel, and may function as a conductor to transfer radiofrequency energy from the ESU 10 to the distal end 34 of the shaft 30 .
- the shaft 30 may be malleable such that it may be manipulated from a first configuration into a second configuration and optionally may be extendable and retractable by pulling or pushing on a finger grip 31 .
- the shaft 30 may be covered with an insulating material such as heat shrink such that the interior of the shaft 30 may be conductive but the exterior of the shaft 30 may be insulated.
- a fluid conduit 38 may be disposed within the lumen 36 shaft 30 spanning from the proximal end 32 to the distal end 34 .
- the fluid conduit 38 may be configured to transport fluid, such as saline from the ESU 10 having an integrated fluid source 40 or a separate fluid source 40 to the distal end 34 of the shaft 30 .
- the fluid conduit 38 may be insulated from the shaft 30 such that fluid transported within the fluid conduit is not energized before it exits the distal end 34 of the shaft 30 .
- the fluid conduit 38 is in electrical communication with the shaft 30 such that fluid exiting the distal end 34 of the shaft 30 is energized.
- a cutting element 42 configured to cut, coagulate, and/or coagulate tissue with a fluid with monopolar radiofrequency energy.
- the cutting element 42 may be composed of a non-conductive substrate such as ceramic, for example, aluminum oxide or Zirconium toughened Alumina.
- the cutting element 42 may be elongate in shape and may include a first face 44 opposite a second face 46 (shown in FIG. 4 ). In one configuration, for example, the configuration shown in FIG.
- the cutting element 42 may include a proximal end 48 , which permanently or releasably couples with the distal end 34 of the shaft 30 , and a distal end 50 .
- the proximal end 48 may be molded or soldered to the shaft 30 , or alternatively, the proximal end 48 may snap-fit or include a bayoneted-type connection to releasably couple to the shaft 30 .
- the distal end 50 may be curved, arcuate, flat, beveled, sharp or any number of configurations depending on the application.
- the cutting element 42 may define a length (“1”) of 0.50′′, with a range in other embodiments from 0.25′′ to 2.0′′; a width (“w”) of 0.15′′, with a range in other embodiments from 0.10′′ to 0.70′′ and a thickness (“t”) of 0.03′′, with a range in other embodiments from 0.01′′ to 0.07′′.
- the first face 44 and the second face 46 may cooperate to define an edge 52 along the perimeter of the cutting element 42 .
- the first face 44 and the second face 46 may each taper in thickness as they extend toward the perimeter of the cutting element such the first face 44 and the second face 46 define a chamfered edge 52 around the perimeter of the cutting element 42 .
- the first face 44 and the second face 46 may define a double chamfered edge as shown in FIG. 4 .
- only one of the first face 44 and second face 46 may define a chambered edge, while the other is flat.
- the edge 52 may include a conductive element 54 deposited or otherwise printed on its surface.
- a trace material such as silver alloy ink, gold ink, or other metallic or metal allow materials may be etched or otherwise deposited onto the surface of the of the cutting element 42 along only the edge 52 .
- the conductive element 54 may completely or partially surround the cutting element 42 .
- the conductive element 54 may be disposed on one side of the cutting element 42 such that the edge 52 is only conductive on a single side of the cutting element; the conductive element 54 may be disposed only at the distal end of the cutting element 42 on the curved portion of the distal end 50 ; or the conductive element 54 may be disposed on the edge 50 around the entire perimeter of the cutting element 42 .
- the conductive element 54 defines a flat and co-planar surface with the edge 52 and about the midpoint between the width of the face 44 and the second face 46 .
- the edge 52 thickness, after etching on the conductive element 54 may be define a thickness of 0.006′′, with a range in other embodiments from 0.003′′ to 0.10′′.
- the conductive element 54 may be in electrical communication with the shaft 30 , and therefore the ESU 10 , by either directly coupling to the distal end 34 of the shaft 30 or by a separate conductor (not shown).
- the cutting element 42 may further include a soldering strip 56 configured to electrically couple the cutting element 42 to the shaft 30 .
- the soldering strip 56 may further be electrically coupled to the conductive element 54 such that radiofrequency energy may be directed from the ESU 10 to the cutting element 42 .
- the soldering strip 56 is disposed on the first face 44 and not on the second face 46 .
- the soldering strip surrounds the cutting element 42 .
- the cutting element 42 may further include a port (not shown) proximate the proximal end 48 configured to release fluid from the fluid conduit 38 onto the cutting element 42 .
- the cutting element 42 may be configured to coagulate tissue while releasing a conductive fluid such as saline.
- one or more conductors may be disposed within the cutting element 42 sandwiched between the first face 44 and the second face 46 .
- the one or more conductors may be configured to provide a current pathway to the conductive element 54 should a section of the conductive element 54 break-off or otherwise erode during application of electrosurgical energy, which may create a short.
- the one or more conductors may define a mesh-like configuration and may be coupled to various locations along the perimeter of the conductive element 54 to provide a back-up conductive pathway should a portion of the conductive element erode and disrupt the current pathway.
Abstract
A cutting element for an electrosurgical device. The cutting element includes an elongate non-conductive body having a first face opposite a second face, the first face and the second face defining an edge there between. A conductive element is disposed only along the edge, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
Description
- This application is a continuation of U.S. patent application Ser. No. 15/841,790, filed Dec. 14, 2017, entitled ELECTROSURGICAL BLADE WITH MINIMALLY EXPOSED EDGE, ALTERNATIVE TO COATED BLADE, which is related to and claims priority to U.S. Provisional Patent Application Ser. No. 62/434,753, filed Dec. 15, 2016, entitled ELECTROSURGICAL BLADE WITH MINIMALLY EXPOSED EDGE, ALTERNATIVE TO COATED BLADE, the entirety of which are incorporated herein by reference.
- This present invention relates to electrosurgical devices, and in particular, monopolar radiofrequency electrosurgical devices.
- Monopolar electrosurgical devices are surgical devices that are configured to dissect tissue with radiofrequency energy as opposed to dissection of tissue with a traditional scalpel. One of the main benefits of such devices are precision dissection on par with that of scalpel while providing the bleeding control capability of traditional electrosurgery with minimal thermal injury to collateral tissue. This results in a highly efficient cut that requires less power to operate and improves patient outcomes by reducing collateral tissue damage.
- Currently, some monopolar electrosurgical devices are manufactured by including a conductive substrate, such as an electrode, that is coated with a glass-based insulator material. In some devices, the resulting cutting tip includes minimally exposed conductive edge that is in the range of 1 to 100 microns in width. Therefore, approximately greater than 99% of the cutting tip is insulated and less than 1% is exposed. This minimally exposed edge enables the focused energy to be delivered only at the exposed edge, while the remainder of the tip is insulated and kept at a relatively low temperature. The end result is precision cutting with minimal collateral damage. However, this method of manufacture requires an expensive glass-coating process, potential for manufacturing efficiency, and reduction in reliance on highly custom materials.
- Some embodiments advantageously provide for a cutting element for an electrosurgical device. The cutting element includes an elongate non-conductive body having a first face opposite a second face, the first face and the second face defining an edge there between. A conductive element is disposed only along the edge, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
- In another aspect of this embodiment, the edge is a chamfered edge.
- In another aspect of this embodiment, the first face and the second face are substantially flat.
- In another aspect of this embodiment, the conductive element is composed of one from the group consisting of silver alloy and gold alloy.
- In another aspect of this embodiment, the elongate non-conductive body is composed of Zirconium toughened Alumina.
- In another aspect of this embodiment, the elongate non-conductive body includes a proximal end and a distal end, and wherein the distal end is curved.
- In another aspect of this embodiment, the conductive element is etched onto the elongate non-conductive body.
- In another aspect of this embodiment, the elongate non-conductive body defines a perimeter and wherein the conductive element is disposed around the perimeter.
- In another aspect of this embodiment, the elongate non-conductive body includes a soldered conductor on the first face, the conductor being configured to electrically couple the conductive element to a shaft of the electrosurgical device.
- In another aspect of this embodiment, the cutting element is configured to be coupled to an elongate shaft, and wherein the elongate shaft is coupled to a handle of the electrosurgical device.
- In another embodiment, a cutting element for an electrosurgical device includes an elongate non-conductive body having a first face opposite a second face and defining a major longitudinal axis, the first face and the second face defining a double chamfered edge there between. A conductive element is disposed only along the double chamfered edge, the conductive element being substantially perpendicular to the major elongate axis, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
- In another aspect of this embodiment, the conductive element is one from the group consisting of gold alloy ink and silver alloy ink printed on the double chamfered edge.
- In another aspect of this embodiment, the first face and the second face are substantially flat.
- In another aspect of this embodiment, the elongate non-conductive body is composed of Zirconium toughened Alumina.
- In another aspect of this embodiment, the elongate non-conductive body includes a proximal end and a distal end, and wherein the distal end is curved.
- In another aspect of this embodiment, the elongate non-conductive body defines a perimeter and wherein the conductive element is disposed around substantially the entirety of the perimeter.
- In another aspect of this embodiment, the elongate non-conductive body includes a soldered conductor on the first face, the conductor being configured to electrically couple the conductive element to a shaft of the electrosurgical device.
- In another aspect of this embodiment, the cutting element is configured to be coupled to an elongate shaft, and wherein the elongate shaft is coupled to a handle of the electrosurgical device.
- In another aspect of this embodiment, the conductive element is disposed along a midpoint of a width of the conductive element.
- In another embodiment, an electrosurgical device includes a handle. An elongate shaft extends from the handle, the elongate shaft defines a proximal end coupled to the handle and a distal end. A cutting element is coupled to the distal end of the shaft, the cutting element includes a flat and elongate non-conductive body having a first face opposite a second face and defines a major longitudinal axis, the first face and the second face define a double chamfered edge there between, the non-conductive body defines a proximal end coupled to the elongate shaft and an arcuate distal end. A conductive element composed of a silver alloy is printed only along the double chamfered edge, the conductive element being substantially perpendicular to the major elongate axis, the conductive element being configured to cut tissue with monopolar radiofrequency energy.
- A more complete understanding of embodiments described herein, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:
-
FIG. 1 is a system view of an electrosurgical unit and electrosurgical device constructed in accordance with the principles of the present application; -
FIG. 2 is a perspective view of the cutting element of the electrosurgical device shown inFIG. 1 ; -
FIG. 3 is a side view of the cutting element shown inFIG. 2 ; -
FIG. 4 is a top view of the cutting element shown inFIG. 3 ; and -
FIG. 5 is a bottom view of the cutting element shown inFIG. 4 . - As used herein, relational terms, such as “first” and “second,” “top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
- As used herein, relational terms, such as “first” and “second,” “top” and “bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
- Referring now to the drawings in which like reference designators refer to like elements, there is shown in
FIG. 1 and exemplary electrosurgical unit (“ESU”) constructed in accordance with the principles of the present application and designated generally as “10.” The ESU 10 may include aradiofrequency generator 12 configured to house and electrically couple the components and circuits of theESU 10 and a touch actuateddisplay 14 configured to receive energy requests from one or more electrosurgical hand pieces that electrically couple to theradiofrequency generator 12, display treatment progress and measurements, for example, impedance, and initiate and/or terminate the supply of radiofrequency energy and fluid with one or more electrosurgical hand pieces that may be electrically coupled to theESU 10. In an exemplary configuration, the ESU 10 includes afirst receptacle 16, which may be a 3-pin connector configured to receive and electrically couple with a bipolar electrosurgical hand piece (not shown) configured to deliver bipolar radiofrequency energy to tissue. The ESU 10 may further include asecond receptacle 18, for example, a 7-pin receptacle, configured to receive and electrically couple with anelectrosurgical hand piece 20 configured to deliver at least one of monopolar radiofrequency energy or a combination of bipolar radiofrequency energy and monopolar radiofrequency energy. Additional details about anexemplary ESU 10 of the present application may found in U.S. patent application Ser. No. 14/927,999, filed Oct. 30, 2015, entitled RF OUTPUT STAGE SWITCHING MECHANISM, the entirety of which is incorporated herein by reference. In other configurations, the ESU 10 may include a single receptacle configured to deliver one or both of monopolar and bipolar radiofrequency energy to which the bipolar electrosurgical hand piece or theelectrosurgical hand piece 20 may couple with. - Continuing to refer to
FIG. 1 , theelectrosurgical hand piece 20 the may include ahandle 22 which couples to thesecond receptacle 18 and includes afirst actuator 24 configured to initiate operation of thehand piece 20 in CUT mode, asecond actuator 26 configured to initiate operation of thehand piece 20 in COAG mode, and athird actuator 28 configured to initiate operation of thehand piece 20 in TRANS mode. Although three actuators are shown which initiate various functions of thehand piece 20, it is contemplated that only thefirst actuator 24 may be included, or thefirst actuator 24 and thesecond actuator 26 may only be included. As described herein CUT mode operates thehand piece 20 to dissect and/or resect tissue; COAG mode operates thehand piece 20 to coagulate tissue for hemostasis; and TRANS mode operates thehand piece 20 to coagulate tissue while releasing a fluid. - Extending distally from the
handle 22 may be anelongate shaft 30 defining aproximal end 32, adistal end 34, and alumen 36 there between. Theproximal end 32 of theshaft 30 may be coupled to the distal end of thehandle 22. In an exemplary configuration, one or more conductors (not shown) may extend through thehandle 22 and connect to theshaft 30 or extend through thelumen 36 toward thedistal end 34 of theshaft 30 to electrically connect theESU 10 with thehand piece 20 when thehand piece 20 is coupled to thesecond receptacle 18. Alternatively, theshaft 30 may be composed of an electrically conductive material, such as stainless steel, and may function as a conductor to transfer radiofrequency energy from theESU 10 to thedistal end 34 of theshaft 30. In one configuration theshaft 30 may be malleable such that it may be manipulated from a first configuration into a second configuration and optionally may be extendable and retractable by pulling or pushing on afinger grip 31. In an exemplary configuration, theshaft 30 may be covered with an insulating material such as heat shrink such that the interior of theshaft 30 may be conductive but the exterior of theshaft 30 may be insulated. In one configuration, afluid conduit 38 may be disposed within thelumen 36shaft 30 spanning from theproximal end 32 to thedistal end 34. Thefluid conduit 38 may be configured to transport fluid, such as saline from theESU 10 having an integratedfluid source 40 or a separatefluid source 40 to thedistal end 34 of theshaft 30. In an exemplary configuration, thefluid conduit 38 may be insulated from theshaft 30 such that fluid transported within the fluid conduit is not energized before it exits thedistal end 34 of theshaft 30. In another configuration, thefluid conduit 38 is in electrical communication with theshaft 30 such that fluid exiting thedistal end 34 of theshaft 30 is energized. - Now referring to
FIGS. 1 and 2 , extending from thedistal end 34 of theshaft 30 may include a cuttingelement 42 configured to cut, coagulate, and/or coagulate tissue with a fluid with monopolar radiofrequency energy. In one configuration, the cuttingelement 42 may be composed of a non-conductive substrate such as ceramic, for example, aluminum oxide or Zirconium toughened Alumina. The cuttingelement 42 may be elongate in shape and may include afirst face 44 opposite a second face 46 (shown inFIG. 4 ). In one configuration, for example, the configuration shown inFIG. 2 , thefirst face 44 and thesecond face 46 may be flat and in another configuration thefirst face 44 and/or thesecond face 46 may define a curved surface, whether a concavity or convexity. The cuttingelement 42 may include aproximal end 48, which permanently or releasably couples with thedistal end 34 of theshaft 30, and adistal end 50. For example, theproximal end 48 may be molded or soldered to theshaft 30, or alternatively, theproximal end 48 may snap-fit or include a bayoneted-type connection to releasably couple to theshaft 30. Thedistal end 50 may be curved, arcuate, flat, beveled, sharp or any number of configurations depending on the application. In an exemplary configuration, the cuttingelement 42 may define a length (“1”) of 0.50″, with a range in other embodiments from 0.25″ to 2.0″; a width (“w”) of 0.15″, with a range in other embodiments from 0.10″ to 0.70″ and a thickness (“t”) of 0.03″, with a range in other embodiments from 0.01″ to 0.07″. - Referring now to
FIGS. 2-5 , thefirst face 44 and thesecond face 46 may cooperate to define anedge 52 along the perimeter of the cuttingelement 42. In particular, thefirst face 44 and thesecond face 46 may each taper in thickness as they extend toward the perimeter of the cutting element such thefirst face 44 and thesecond face 46 define a chamferededge 52 around the perimeter of the cuttingelement 42. In other words, thefirst face 44 and thesecond face 46 may define a double chamfered edge as shown inFIG. 4 . Alternatively, only one of thefirst face 44 andsecond face 46 may define a chambered edge, while the other is flat. Theedge 52 may include aconductive element 54 deposited or otherwise printed on its surface. In particular, a trace material, such as silver alloy ink, gold ink, or other metallic or metal allow materials may be etched or otherwise deposited onto the surface of the of the cuttingelement 42 along only theedge 52. Theconductive element 54 may completely or partially surround the cuttingelement 42. For example, theconductive element 54 may be disposed on one side of the cuttingelement 42 such that theedge 52 is only conductive on a single side of the cutting element; theconductive element 54 may be disposed only at the distal end of the cuttingelement 42 on the curved portion of thedistal end 50; or theconductive element 54 may be disposed on theedge 50 around the entire perimeter of the cuttingelement 42. In one configuration, theconductive element 54 defines a flat and co-planar surface with theedge 52 and about the midpoint between the width of theface 44 and thesecond face 46. In an exemplary configuration, theedge 52 thickness, after etching on theconductive element 54 may be define a thickness of 0.006″, with a range in other embodiments from 0.003″ to 0.10″. Theconductive element 54 may be in electrical communication with theshaft 30, and therefore theESU 10, by either directly coupling to thedistal end 34 of theshaft 30 or by a separate conductor (not shown). For example, the cuttingelement 42 may further include asoldering strip 56 configured to electrically couple the cuttingelement 42 to theshaft 30. Thesoldering strip 56 may further be electrically coupled to theconductive element 54 such that radiofrequency energy may be directed from theESU 10 to the cuttingelement 42. In an exemplary configuration, thesoldering strip 56 is disposed on thefirst face 44 and not on thesecond face 46. In other configurations, the soldering strip surrounds the cuttingelement 42. The cuttingelement 42 may further include a port (not shown) proximate theproximal end 48 configured to release fluid from thefluid conduit 38 onto the cuttingelement 42. In such a configuration, the cuttingelement 42 may be configured to coagulate tissue while releasing a conductive fluid such as saline. In another configuration, one or more conductors (not shown) may be disposed within the cuttingelement 42 sandwiched between thefirst face 44 and thesecond face 46. The one or more conductors may be configured to provide a current pathway to theconductive element 54 should a section of theconductive element 54 break-off or otherwise erode during application of electrosurgical energy, which may create a short. For example, the one or more conductors may define a mesh-like configuration and may be coupled to various locations along the perimeter of theconductive element 54 to provide a back-up conductive pathway should a portion of the conductive element erode and disrupt the current pathway. - It will be appreciated by persons skilled in the art that the present embodiments are not limited to what has been particularly shown and described herein above. In addition, unless mention was made above to the contrary, it should be noted that all of the accompanying drawings are not to scale. A variety of modifications and variations are possible in light of the above teachings without departing from the scope of the following embodiments.
Claims (16)
1. A cutting element for an electrosurgical device, comprising:
a conductive shaft;
an elongate non-conductive body defining a major longitudinal axis having a first face opposite a second face, the first face and the second face joining to define an edge:
a conductive element configured to cut tissue with monopolar radiofrequency energy; and
the elongate non-conductive body includes a soldering strip disposed only on the first face and the edge, the soldering strip spanning an entire width of a proximal portion of the elongate non-conductive body transverse to the major longitudinal axis, the soldering strip being configured to electrically couple the conductive element to the conductive shaft of the electrosurgical device.
2. The cutting element of claim 1 , wherein the edge is a chamfered edge.
3. The cutting element of claim 1 , wherein the first face and the second face are flat.
4. The cutting element of claim 1 , wherein the conductive element is composed of one from the group consisting of silver allow and gold alloy.
5. The cutting element of claim 1 , wherein the elongate non-conductive body is composed of zirconium toughened alumina (ZTA).
6. The cutting element of claim 1 , wherein a distal end of the elongate non-conductive body is curved.
7. The cutting element of claim 1 , wherein the conductive element is etched onto the elongate non-conductive body.
8. The cutting element of claim 7 , wherein the elongate non-conductive body defines a perimeter and wherein the conductive element is disposed around the perimeter.
9. A cutting element for an electrosurgical device, comprising:
a conductive shaft;
an elongate non-conductive body having a first face opposite a second face and defining a major longitudinal axis, the first face and the second face joining to define a double chamfered edge:
a conductive element configured to cut tissue with monopolar radiofrequency energy; and
the elongate non-conductive body includes a soldering strip disposed only on the first face and the double chamfered edge, the soldering strip spanning an entire width of a proximal portion of the elongate non-conductive body and transverse to the major longitudinal axis, the soldering strip being configured to electrically couple the conductive element to the conductive shaft of the electrosurgical device.
10. The cutting element of claim 9 , wherein the conductive element is one from the group consisting of gold alloy ink and silver alloy ink printed on the double chamfered edge.
11. The cutting element of claim 9 , wherein the first face and the second face are flat.
12. The cutting element of claim 9 , wherein the elongate non-conductive body is composed of ZTA.
13. The cutting element of claim 9 , wherein the conductive shaft is composed of stainless steel.
14. An electrosurgical device, comprising:
a handle;
a conductive elongate shaft extending from the handle and defining a major longitudinal axis, the conductive elongate shaft defining a proximal end coupled to the handle and a distal end opposite the proximal end;
a cutting element coupled to the distal end of the conductive elongate shaft;
a conductive element configured to cut tissue with monopolar radiofrequency energy; and
the elongate non-conductive body includes a soldering strip disposed only on the first face and the double chamfered edge, the soldering strip spanning an entire width of a proximal portion of the elongate non-conductive body transverse to the major longitudinal axis, the soldering strip being configured to electrically couple the conductive element to the conductive elongate shaft of the electrosurgical device.
15. The electrosurgical device of claim 1 , wherein the edge is a double chamfered edge and the double chamfered edge has a thickness of 0.006″.
16. The electrosurgical device of claim 15 , wherein the thickness of the conductive element and the double chamfered edge is between 0.003″ and 0.10″.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/219,461 US20230346456A1 (en) | 2016-12-15 | 2023-07-07 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201662434753P | 2016-12-15 | 2016-12-15 | |
US15/841,790 US11723713B2 (en) | 2016-12-15 | 2017-12-14 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
US18/219,461 US20230346456A1 (en) | 2016-12-15 | 2023-07-07 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/841,790 Continuation US11723713B2 (en) | 2016-12-15 | 2017-12-14 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230346456A1 true US20230346456A1 (en) | 2023-11-02 |
Family
ID=62557069
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/841,790 Active 2039-09-24 US11723713B2 (en) | 2016-12-15 | 2017-12-14 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
US18/219,461 Pending US20230346456A1 (en) | 2016-12-15 | 2023-07-07 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/841,790 Active 2039-09-24 US11723713B2 (en) | 2016-12-15 | 2017-12-14 | Electrosurgical blade with minimally exposed edge, alternative to coated blade |
Country Status (1)
Country | Link |
---|---|
US (2) | US11723713B2 (en) |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3987795A (en) * | 1974-08-28 | 1976-10-26 | Valleylab, Inc. | Electrosurgical devices having sesquipolar electrode structures incorporated therein |
US4248231A (en) * | 1978-11-16 | 1981-02-03 | Corning Glass Works | Surgical cutting instrument |
US4589411A (en) * | 1985-02-08 | 1986-05-20 | Aaron Friedman | Electrosurgical spark-gap cutting blade |
US5521576A (en) | 1993-10-06 | 1996-05-28 | Collins; Franklyn M. | Fine-line thick film resistors and resistor networks and method of making same |
US5713895A (en) * | 1994-12-30 | 1998-02-03 | Valleylab Inc | Partially coated electrodes |
US6126656A (en) * | 1996-01-30 | 2000-10-03 | Utah Medical Products, Inc. | Electrosurgical cutting device |
US6086586A (en) | 1998-09-14 | 2000-07-11 | Enable Medical Corporation | Bipolar tissue grasping apparatus and tissue welding method |
US6530924B1 (en) * | 2000-11-03 | 2003-03-11 | Alan G. Ellman | Electrosurgical tonsilar and adenoid electrode |
US6610057B1 (en) * | 2001-03-27 | 2003-08-26 | Alan G. Ellman | Electrosurgical blade electrode |
US6942662B2 (en) * | 2001-12-27 | 2005-09-13 | Gyrus Group Plc | Surgical Instrument |
US7736361B2 (en) * | 2003-02-14 | 2010-06-15 | The Board Of Trustees Of The Leland Stamford Junior University | Electrosurgical system with uniformly enhanced electric field and minimal collateral damage |
US7727232B1 (en) * | 2004-02-04 | 2010-06-01 | Salient Surgical Technologies, Inc. | Fluid-assisted medical devices and methods |
US20070005057A1 (en) * | 2005-06-30 | 2007-01-04 | Surginetics, Llc | Electrosurgical Blade With Profile For Minimizing Tissue Damage |
WO2009049266A2 (en) | 2007-10-12 | 2009-04-16 | Conmed Corporation | Apparatus and methods for the measurement of cardiac output |
US8734437B2 (en) | 2008-07-23 | 2014-05-27 | Boston Scientific Scimed, Inc. | Catheter having electrically conductive pathways |
WO2011041684A2 (en) | 2009-10-02 | 2011-04-07 | Medtronic-Xomed, Inc. | Endotracheal tube apparatus |
GB2477354B (en) * | 2010-02-01 | 2016-02-24 | Gyrus Medical Ltd | Electrosurgical instrument |
EP2617377B1 (en) * | 2010-10-20 | 2015-03-04 | Terumo Cardiovascular Systems Corporation | Treatment tool for surgical use |
US20120150165A1 (en) * | 2010-12-10 | 2012-06-14 | Salient Surgical Technologies, Inc. | Bipolar Electrosurgical Device |
GB201308558D0 (en) * | 2013-05-13 | 2013-06-19 | Creo Medical Ltd | Electrosurgical apparatus |
CA2827695C (en) * | 2013-09-20 | 2021-02-16 | Leonard Ineson | Adjustable electrosurgical pencil |
GB201323171D0 (en) * | 2013-12-31 | 2014-02-12 | Creo Medical Ltd | Electrosurgical apparatus and device |
US20160051313A1 (en) * | 2014-08-22 | 2016-02-25 | Jerome Canady | Attachment for Electrosurgical System |
WO2016070013A1 (en) | 2014-10-31 | 2016-05-06 | Medtronic Advanced Energy Llc | Fingerswitch circuitry to reduce rf leakage current |
-
2017
- 2017-12-14 US US15/841,790 patent/US11723713B2/en active Active
-
2023
- 2023-07-07 US US18/219,461 patent/US20230346456A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US11723713B2 (en) | 2023-08-15 |
US20180168717A1 (en) | 2018-06-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9974606B2 (en) | Electrosurgical instrument | |
US6942662B2 (en) | Surgical Instrument | |
US11071579B2 (en) | Bipolar cutting and hemostasis blade system | |
US7063697B2 (en) | Bipolar endoscopic surgical scissor blades and instrument incorporating the same | |
AU2002358220B2 (en) | A surgical instrument | |
US6832998B2 (en) | Surgical instrument | |
US6974452B1 (en) | Cutting and cauterizing surgical tools | |
EP0562195A1 (en) | Monopolar polypectomy snare with coagulation electrode | |
CN111093547B (en) | Electrosurgical device | |
US10888368B2 (en) | Electrosurgical dissector with thermal management | |
WO2016029201A1 (en) | Attachment for electrosurgical system | |
US20100211068A1 (en) | Two Piece Tube for Suction Coagulator | |
EP3668434B1 (en) | Electrosurgical apparatus for delivering rf and/or microwave energy into biological tissue | |
US8460291B2 (en) | Two piece tube for suction coagulator | |
CN107582163B (en) | Electrosurgical device | |
US20230346456A1 (en) | Electrosurgical blade with minimally exposed edge, alternative to coated blade | |
WO2018081820A1 (en) | Attachment for electrosurgical system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |
|
AS | Assignment |
Owner name: MEDTRONIC ADVANCED ENERGY LLC, MINNESOTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LAU, NATHANIEL R.;BARDEN, CHRISTOPHER;SACKS, JESSICA;AND OTHERS;REEL/FRAME:066068/0806 Effective date: 20171213 |