GB2495196A - Electrode assembly for an electro-surgical instrument - Google Patents
Electrode assembly for an electro-surgical instrument Download PDFInfo
- Publication number
- GB2495196A GB2495196A GB1216891.0A GB201216891A GB2495196A GB 2495196 A GB2495196 A GB 2495196A GB 201216891 A GB201216891 A GB 201216891A GB 2495196 A GB2495196 A GB 2495196A
- Authority
- GB
- United Kingdom
- Prior art keywords
- text
- locking component
- shaft
- base unit
- thc
- 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.)
- Withdrawn
Links
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
- A61B18/04—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
- A61B18/1482—Probes or electrodes therefor having a long rigid shaft for accessing the inner body transcutaneously in minimal invasive surgery, e.g. laparoscopy
-
- 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
- A61B18/148—Probes or electrodes therefor having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
-
- 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
- A61B18/1485—Probes or electrodes therefor having a short rigid shaft for accessing the inner body through natural openings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00526—Methods of manufacturing
-
- 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
- A61B2018/1495—Electrodes being detachable from a support structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Otolaryngology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Surgical Instruments (AREA)
Abstract
A method of assembling an electrosurgical instrument includes the steps of forming an elongate shaft (39), an electrode (33) and a base unit (32), presenting the electrode (33) to the base unit (32) such that the electrode (33) is temporarily located on the base unit (32), and applying a locking component (34). The locking component (34) holding the electrode (33) and the base unit (32) together. The locking component (34) is then secured to the elongate shaft (39) unit in such a way as to retain the electrode (33) on the base unit (32) and form the completed electrosurgical instrument. The locking component can be secured by means of a mechanical arrangement such as a bayonet fixing, or by a screw threaded connection.
Description
ELECTROSURGICAL tIN STRUM ENT ASSEMBLY Corresponding Applications This application claims priority from United Kingdom patent application number 1116489.4, filed 26 September 2011.
Technical Field
This invention relates to a method of assembling an electrosurgieal instrument, and also to an clcctrosurgical instrument suitable for the treatment of tissue. Such instruments are commonly used for the vaporisation and/or coagulation of tissue in surgical intervention, most commonly in "keyhole" or minimally invasive surgery, but also in "open" surgery.
Background to the Invention
Electrosurgical instruments are growing in sophistication and complexity, with the number of electrodes increasing and the size of electrodes decreasing. One of the major factors in eleetrosurgical instrument design is the difficulty and complexity of instrument assembly, as well as the increased risk of components breaking or becoming detached during use. There is a need for an improved way of assembling complex eleetrosurgical instruments, and the present invention attempts to address this problem.
Summary of Invention
Accordingly, a method of assembling an electrosurgical instrument as provided, the method including: firstly forming components including an elongate shaft, an electrode and an insulating base unit, secondly presenting the electrode to the base unit such that the electrode is temporarily located on the base unit, thirdly applying a locking component, the locking component holding the electrode and the base unit together, and finally securing the locking component to the shaft to form the completed e lectrosurgical instrument.
Conventionally, the components for electrosurgical instruments are fabricated separately, and then assembled together to form the instrument. Each component is added sequentially and secured in place, normally by an adhesive such as an epoxy resin. In contrast, the present invention provides for an electrode to be temporarily located on the base unit (i.e. without permanent fixing such as by adhesive etc.) before being finally secured in position by a locking component which is then attached to the shaft of the electrosurgical instrument. The electrode is only secured to the base unit by the locking component, which is applied after the electrode has been placed in its desired position on the base unit.
In one convenient arrangement, the forming includes forming both first and second electrodes, and the presenting includes presenting both electrodes to the base unit so they are temporarily located on the base component separate one from another.
This enables a bipolar electrosurgical instrument to be manufactured, with active and is return electrodes separated by the insulator provided by the base unit. Other components, such as ftirthcr insulating members or additional electrodes, can be added to the base unit before the locking component is applied.
Conveniently, applying the locking component comprises applying tbe locking component from the distal end of the base unit. In this way, the electrodes and other components are assembled on the base assembly, the locking component is applied from the distal end of the instrument, and then secured in place by whichever securing method as will now be described.
Preferably, securing the locking component to the shaft includes a mechanical interlock mechanism. According to one convenient arrangcmcnl, a first one of either the locking component or the elongate shaft includes a latch mechanism, designed to cooperate with a corresponding part or the second one oreither the locking component or the elongate shaft, such that the securing the locking component to the shaft comprises latching the locking component and shaft one to the other. Conveniently, the latch mechanism comprises a bayonet assembly.
According to an alternative arrangement, the locking component and the elongate shaft include complementary screw-threaded portions, and the securing the locking component to the shaft comprises screwing the locking component on to the shaft.
Description of the Drawings
The invention will now be further described, by way of example only, with refercncc to thc accompanying drawings, in which: Figure 1 is a schematic diagram of an electrosurgical instrument sub-assembly during a first stage of assembly in accordance with an cmbodiment of thc present invention, Figure 2 is a schematic diagram of an clcctrosurgical instrument sub-assembly during a second stage of assembly in accordance with an embodiment of the present invention, Figure 3 is a schematic diagram of an electrosurgical insirument sub-assembly during a third stage of assembly in accordance with an embodiment of the present invention, Figure 4A is a schematic diagram of an electrosurgical instrument sub-assembly during a third stage of assembly in accordance with an alternative embodiment of the prcsent invention, Figure 4B is a schematic diagram of the instrument sub-assembly of Figure 4A, shown in a further connected stagc of assembly.
Figure 5 is a schematic exploded view of a part of an electrosurgical instrument during a first stage of assembly in accordance with another embodiment of the present invention, Figure 6 is a sectional side of the instrument of Figure 5, shown in an assembled condition, and Figure 7 is a perspective view of the instrument of Figure 6.
Description of Embodiments
Referring to Figure 1, the first stage of assembling an electrosurgical instrument shown generally at 1 comprises adding a metallic active electrodc component 2 to a base unit in the form of a ceramic insulator component 3. The active electrode component 2 comprises an elongate tang 4 connected to a tissue contact portion S. The component 2 is brought into engagement with the insulator component 3 from underneath the component 3, such that the tissue contact portion 5 is visible through an aperture 6 in the insulator component 3 with the tissue contact portion 5 abuttthg the edges of the aperture 6. The elongate tang 4 extends proximally from the insulator component 3, as shown in figure 1. The next stage in the assembly process is the addition of a metallic return electrode component 7, the component 7 being introduced from the distal end of the instrument I at the opposite end to the tang 4. The return electrode component comprises a tang 8 and a body portion 9, the component being introduced through an aperture (not shown) in the insulator component 3 such that the tang 8 lies alongside the tang 4 with the body portion 9 surrounding the tissue contact portion 5 of the active electrode component 2. This is the situation shown in Figure 1.
When the sub-assembly of components shown in Figure 1 has been assembled, a locking component 10 is added to hold the components 2, 3, 7 & 8 in place. The locking component 10 is typically comprised of an insulating polymer or ceramic material, and is applied to the sub-assembly of Figure 1 from the distal end of the is instrument, as shown in Figure 2. The locking component 10 is then attached to a tube component 11 forming the shaft of the elcetrosurgical instrument 1, the tube 11 having a bayonet assembly (not shown) adapted to connect with a corresponding bayonet assembly 12 provided on the locking component 10. An aperture 20 in the tube 11 allows access for the tang 4 to be connected to other components such as leads or a conductive suction tube (not shown). Once connected to the tube II, the locking component 10 holds all of the other components in position one against another without the need for adhesive, although an adhesive may be optionally added to the components or a flowable material introduced through the aperture 20 in order to increase the strength of the interlocking assembly. Further apertures 21 are present in the proximal part of the tube 11 to allow for the introduction of further flowablc material if desired.
The tube I I may be formed ola conductive material, or may contain a conductive band (not shown) if an additional return electrode is required. The assembled instrument is shown in Figure 3.
Figures 4A and 4B show a similar instrument ito that of Figure 3, with similar components designated with similar reference numerals. The instrument of Figures 4A and 4B is different in that the active electrode component 2 is of a different design, and in that the locking compollent 10 is provided with a threaded portion 13, which connects with thc tube 11 via a complementary threaded portion 14. Whcn the tube 111 is added to the instrument and rotated to connect it to the locking component. the other components 2, 3, & 7 are all held firmly in place one against another with or without the application of additional adhesive material. Apertures 22 are present in thc proximal part of the tube 11 to allow for the introduction of flowable material if desired. Figure 4B shows the locking component 10 and tube Ii connected on to the other.
Figurc 5 shows an ahernative embodiment of instrument, before assembly thereof. The components include a metallic tube 30 with a cradle 31 formed at its distal end, Into the cradle 31 is assembled a ceramic holder 32, on which is mounted an active electrode 33. Once the holder 32 and electrode 33 have been assembled on the cradle 31, an insulating locking member 34 is added, the locking member being introduced from the proximal end of the tube 30. The locking member comprises a conical body 35, adapted to cooperate with a corresponding conical section 36 present is forming part of the cradle 31. The locking member 34 also includes a collar 37 haying a central aperture 38 therein. When the locking member is introduced along the tube 30, it is affixed over the cradle 31 with its conical body 35 forming a tight press-fit coimection with the conical section 36 of the cradle. The collar 37 fits over the ceramic holdcr 32, holding both it and thc active electrode 33 in place, with the active electrode visible through the aperture 38 in the collar 37. The ncxt stage of assembly is the addition of an insulating tube 39, secured over a corresponding circular lip 40 present on the proximal end of the locking member 34. Once assembled, as shown in Figures 6 and 7, the components can be secured in place by the introduction of a flowable material though apertures (not shown). A lead 41, shown in Figure 6, connects the active electrode 33 to electrical connections at the proximal end of the instrument, and subsequently to an electrosurgical generator (not shown).
Other embodiments will be apparent to those skilled in the art without departing from the scope of the present invention. Other forms of locking component can be envisaged, as long as they can be used to hold together the other components that have been formed into a temporary sub-assembly ready to receive the locking assembly.
Claims (1)
- <claim-text>Claims: 1. A method of assembling an electrosurgical instrument, the method including firstly forming components including an elongate shaft, an electrode and an insulating base unit, secondly presenting the electrode to the base unit such that the electrode is temporarily located on the base unit, thirdly applying a locking component, the locking component holding the electrode and the base unit together, and finally securing the locking component to the shaft to form the completed electrosurgical instrument.</claim-text> <claim-text>2. A method according to claim 1, wherein the forming includes forming both is first and second electrodes, and presenting includes presenting both electrodes to the base unit so they are temporarily located on the base component separate one from another.</claim-text> <claim-text>3. A method according to claims I or 2, wherein the applying the locking component comprises applying the locking component from the distal end of the base unit.</claim-text> <claim-text>4. A method according to any of the preceding claims, wherein the securing the locking component to the shaft includes a mechanical interlock mechanism.</claim-text> <claim-text>5. A method according to claim 4, wherein a first one oleither the locking component or the elongate shaft includes a latch mechanism, designed to cooperate with a corresponding part of the second one of either the locking component or the elongate shaft, such that the securing the locking component to the shaft comprises latching the locking component and shaft one to the other.</claim-text> <claim-text>6. A method according to claim 5, wherein the latch mechanism comprises a bayonet assembly.</claim-text> <claim-text>7. A method according to claim 4, wherein thc locking component and thc elongatc shaft include complcmcntary screw-threaded portions, and the securing thc locking component to the shaft compriscs screwing thc locking component on to thc shaft.</claim-text> <claim-text>8. An clectrosurgical instrument, the electrosurgical instrument having bccn at Icast partially assembled by: firstly forming components including an elongate shaft, an electrode and an insulating basc unit, sccondly presenting thc electrode to the basc unit such that the electrodc is temporarily locatcd on thc base unit, thirdly applying a locking component, the locking component holding the is electrodc and the base unit togethcr, and finally sccuring the locking componcnt to the shaft to form thc completed elcctrosurgical instrument.</claim-text> <claim-text>9. An clectrosurgical instrument according to claim 8, wherein the forming includes forming both first and sccond electrodes, and thc presenting includes prcsenting both electrodes to the base unit so thcy arc temporarily located on the base component separate one from another.</claim-text> <claim-text>10. An clectrosurgical instrumcnt according to claims 8 or 9, wherein thc applying the locking component compriscs applying the locking componcnt from the distal end olihe base unit.</claim-text> <claim-text>11. An elcctrosurgical instrument according to any of claims 8 to 10, wherein thc securing the locking component to thc shaft includes a mechanical interlock mechanism.</claim-text> <claim-text>12. An electrosurgical instrument according to claim 11, wherein a first one ofSeither the locking component or the elongate shaft includes a latch mechanism, designed to cooperate with a corresponding part of the second one of either the locking component or the elongate shaft, such that the securing the locking component to the shaft comprises latching the locking component and shaft one to the other.</claim-text> <claim-text>13. An electrosurgical instrument according to claim 12, wherein the latch mechanism comprises a bayonet asscmbly.</claim-text> <claim-text>14. An elcctrosurgical instrument according to claim 11, wherein the locking component and the elongate shaft include complementary screw-threaded portions, and the securing the locking component to the shaft comprises screwing the locking component on to the shaft.</claim-text> <claim-text>15. An electrosurgical instrument, comprising: an elongate shaft, a first electrode, an insulating base unit, and a locking component, wherein the first electrode is held on the base unit by the locking component, and the locking component is secured to thc clongatc shaft to form the completed electrosurgical instrument.</claim-text> <claim-text>16. An instrument according to claim 15, and further comprising a second electrode, wherein both the first and second electrodes arc held on the base unit by the locking component separate from one another.</claim-text> <claim-text>17. An instrument according to claims 15 or 16, wherein the locking component applies from the distal end of the base unit.</claim-text> <claim-text>18. An instrument according to any of claims 15 to 17, wherein the locking component includes at least part of a mechanical interlock mechanism.</claim-text> <claim-text>19. An instrument according to claim 18, wherein a first one of either the locking component or the elongate shaft includes a latch mechanism designed to cooperate with a corresponding part of the second one of either the locking component or the elongate shaft, such that the locking component is latched to the shaft, or vice versa.</claim-text> <claim-text>20. An instrument according to claim 19, wherein the latch mechanism comprises a bayonet assembly.</claim-text> <claim-text>21. An instrument according to cktim 18, wherein the locking component and the elongate shaft include complementary screw-threaded portions, and the locking component is screwed on to the shaft, or vice versa.</claim-text> <claim-text>22. A method of assembling an electrosurgical instrument substantially as is hercinbefore described, with reference to Figures Ito 5.</claim-text> <claim-text>23. An elcctrosurgical instrument substantially as hereinbcforc described, with reference to Figures 6 and 7.</claim-text>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB1116489.4A GB201116489D0 (en) | 2011-09-26 | 2011-09-26 | Electrosurgical instrument assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201216891D0 GB201216891D0 (en) | 2012-11-07 |
| GB2495196A true GB2495196A (en) | 2013-04-03 |
Family
ID=44993316
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1116489.4A Ceased GB201116489D0 (en) | 2011-09-26 | 2011-09-26 | Electrosurgical instrument assembly |
| GB1216891.0A Withdrawn GB2495196A (en) | 2011-09-26 | 2012-09-21 | Electrode assembly for an electro-surgical instrument |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB1116489.4A Ceased GB201116489D0 (en) | 2011-09-26 | 2011-09-26 | Electrosurgical instrument assembly |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20130079769A1 (en) |
| GB (2) | GB201116489D0 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11246650B2 (en) | 2019-01-10 | 2022-02-15 | RELIGN Corporation | Arthroscopic devices and methods |
| GB2613847A (en) * | 2021-12-15 | 2023-06-21 | Gyrus Medical Ltd | Electrode assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030083655A1 (en) * | 2001-10-18 | 2003-05-01 | Van Wyk Robert A. | Electrosurgical ablator with aspiration |
| US20060235377A1 (en) * | 2005-04-13 | 2006-10-19 | Christopher Earley | Electrosurgical tool |
| GB2451623A (en) * | 2007-08-03 | 2009-02-11 | Gyrus Medical Ltd | Electrosurgical Instrument for underwater surgery with aspiration aperture in electrode |
| US20100160910A1 (en) * | 2008-12-23 | 2010-06-24 | Kramer Steven C | Electrosurgical tool |
| US20100204690A1 (en) * | 2008-08-13 | 2010-08-12 | Arthrocare Corporation | Single aperture electrode assembly |
-
2011
- 2011-09-26 GB GBGB1116489.4A patent/GB201116489D0/en not_active Ceased
-
2012
- 2012-09-07 US US13/607,071 patent/US20130079769A1/en not_active Abandoned
- 2012-09-21 GB GB1216891.0A patent/GB2495196A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030083655A1 (en) * | 2001-10-18 | 2003-05-01 | Van Wyk Robert A. | Electrosurgical ablator with aspiration |
| US20060235377A1 (en) * | 2005-04-13 | 2006-10-19 | Christopher Earley | Electrosurgical tool |
| GB2451623A (en) * | 2007-08-03 | 2009-02-11 | Gyrus Medical Ltd | Electrosurgical Instrument for underwater surgery with aspiration aperture in electrode |
| US20100204690A1 (en) * | 2008-08-13 | 2010-08-12 | Arthrocare Corporation | Single aperture electrode assembly |
| US20100160910A1 (en) * | 2008-12-23 | 2010-06-24 | Kramer Steven C | Electrosurgical tool |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201116489D0 (en) | 2011-11-09 |
| US20130079769A1 (en) | 2013-03-28 |
| GB201216891D0 (en) | 2012-11-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |