Patent US6013076A successfully refreshed from Google Patents.
US6013076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrosurgical instrument
Assignee: Gyrus Medical Ltd
•
Filing: 1996-10-25
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Granted: 2000-01-11
•
Expires: 2016-10-25
Abstract
Abstract An electrosurgical instrument is disclosed for the treatment of tissue in the presence of an electrically-conductive fluid. The instrument comprises an instrument shaft, and a tissue treatment electrode at one end of the shaft, the tissue treatment electrode being constructed to define a plurality of pockets for trapping electrically-conductive fluid. Alternatively, the tissue treatment electrode is made from an electrically-conductive material and is coated with a resistive inert material which is effective to increase the local power density within the tissue treatment electrode.
Inventors
- 👤 Nigel Mark Goble
- 👤 Colin Charles Owen Goble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/148; A61B18/1206; A61B18/1485; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00083; A61B2018/00315; A61B2018/00505; A61B2018/00517; A61B2018/00547; A61B2018/00559; A61B2018/00571; A61B2018/00577; A61B2018/00589; A61B2018/00601; A61B2018/00625; A61B2018/00636; A61B2018/00666; A61B2018/00678; A61B2018/00696; A61B2018/00702; A61B2018/00708; A61B2018/00755; A61B2018/00773; A61B2018/00875; A61B2018/00892; A61B2018/1213; A61B2018/124; A61B2018/1246; A61B2018/126; A61B2018/1405; A61B2018/1425; A61B2018/143; A61B2018/1432; A61B2018/1435; A61B2018/1437; A61B2018/1472; A61B18/16; A61B2018/162; A61B18/18; A61B18/1815; A61B2018/1861
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
134 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising an instrument shaft, and, at one end of the shaft, a tissue treatment electrode and an exposed return electrode electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed only within said tissue treatment electrode so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member.
Claim 2
Dependent Claim
134 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising an instrument shaft, and, at one end of the shaft, a tissue treatment electrode and an exposed return electrode electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed only within said tissue treatment electrode so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member.
Claim 3
Dependent Claim
22 words
An electrosurgical instrument as claimed in claim 1, wherein the tissue treatment electrode comprises a shaft of electrically-conductive material having sprialling ridges.
Claim 4
Dependent Claim
24 words
An electrosurgical instrument as claimed in claim 1, wherein the tissue treatment electrode is constituted by a generally helical coil made of electrically-conductive material.
Claim 5
Dependent Claim
25 words
An electrosurgical instrument as claimed in claim 1, wherein the tissue treatment electrode is constituted by a plurality of filaments made of an electrically-conductive material.
Claim 6
Dependent Claim
23 words
An electrosurgical instrument as claimed in claim 1, further comprising an insulating shroud which extends along, and partially surrounds, the tissue treatment electrode.
Claim 7
Dependent Claim
22 words
An electrosurgical instrument as claimed in claim 1, wherein the tissue treatment electrode is made of a noble metal such as platinum.
Claim 8
Dependent Claim
25 words
An electrosurgical instrument as claimed in claim 1, wherein the tissue treatment electrode is made of a platinum alloy such as platinum/iridium, platinum/tungsten or platinum/cobalt.
Claim 9
Dependent Claim
17 words
An electrosurgical instrument as claimed in claim 1, wherein the tissue treatment electrode is made of tungsten.
Claim 10
Dependent Claim
64 words
An electrosurgical instrument as claimed in claim 1, further comprising a return electrode which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being exposed at the instrument's extreme distal end, and the return electrode having a fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member.
Claim 11
Dependent Claim
24 words
An electrosurgical instrument as claimed in claim 9, wherein the fluid contact surface of the return electrode is formed with a smooth polished surface.
Claim 12
Dependent Claim
24 words
An electrosurgical instrument, as claimed in claim 1, wherein the tissue treatment electrode is constituted by a plurality of interlaced strands of electrically-conductive material.
Claim 13
Dependent Claim
29 words
An electrosurgical instrument, as claimed in claim 1, wherein the tissue treatment electrode comprises a plurality of strands of electrically-conductive material, with the strands being wound about each other.
Claim 14
Dependent Claim
122 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising an instrument shaft, and, at one end of the shaft, a tissue treatment electrode and an exposed return electrode electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed to define a plurality of pockets for trapping electrically-conductive fluid and vapour, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and wherein the tissue treatment electrode is constituted by a plurality of interlaced strands of electrically-conductive material.
Claim 15
Dependent Claim
122 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising an instrument shaft, and, at one end of the shaft, a tissue treatment electrode and an exposed return electrode electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed to define a plurality of pockets for trapping electrically-conductive fluid and vapour, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and wherein the tissue treatment electrode is constituted by a plurality of interlaced strands of electrically-conductive material.
Claim 16
Dependent Claim
127 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising an instrument shaft, and, at one end of the shaft, a tissue treatment electrode and an exposed return electrode electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed to define a plurality of pockets for trapping electrically-conductive fluid and vapour, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and wherein the tissue treatment electrode comprises a plurality of strands of electrically-conductive material, with the strands being wound about each other.
Claim 17
Dependent Claim
127 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising an instrument shaft, and, at one end of the shaft, a tissue treatment electrode and an exposed return electrode electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed to define a plurality of pockets for trapping electrically-conductive fluid and vapour, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and wherein the tissue treatment electrode comprises a plurality of strands of electrically-conductive material, with the strands being wound about each other.
Claim 18
Dependent Claim
187 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising: an instrument shaft, and an electrode assembly at one end of the shaft, the electrode assembly comprising a tissue treatment electrode with an exposed treatment portion and a return electrode with an exposed fluid contact surface and which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being exposed at the instrument's extreme distal end and including a plurality of pockets for trapping said electrically-conductive fluid, the return electrode having a smooth, polished, fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member, said plurality of pockets being formed only within said tissue treatment electrode so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and the ratio of the surface area of the tissue treatment electrode's exposed treatment portion to the surface area of the return electrode's exposed fluid contact surface being equal to or less than 1 to 1.
Claim 19
Dependent Claim
187 words
An electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid, the instrument comprising: an instrument shaft, and an electrode assembly at one end of the shaft, the electrode assembly comprising a tissue treatment electrode with an exposed treatment portion and a return electrode with an exposed fluid contact surface and which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being exposed at the instrument's extreme distal end and including a plurality of pockets for trapping said electrically-conductive fluid, the return electrode having a smooth, polished, fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member, said plurality of pockets being formed only within said tissue treatment electrode so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and the ratio of the surface area of the tissue treatment electrode's exposed treatment portion to the surface area of the return electrode's exposed fluid contact surface being equal to or less than 1 to 1.
Claim 20
Dependent Claim
24 words
An electrosurgical instrument as claimed in claim 15, further comprising means for feeding electrically-conductive fluid over the fluid contact surface of the return electrode.
Claim 21
Dependent Claim
158 words
An electrode unit for an electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid medium, the electrode unit comprising a shaft having at one end means for connection to an instrument handpiece, and, mounted on the other end of the shaft, a tissue treatment electrode and an exposed return electrode which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member.
Claim 22
Dependent Claim
158 words
An electrode unit for an electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid medium, the electrode unit comprising a shaft having at one end means for connection to an instrument handpiece, and, mounted on the other end of the shaft, a tissue treatment electrode and an exposed return electrode which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member.
Claim 23
Dependent Claim
210 words
Electrosurgical apparatus comprising a radio frequency generator and an electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid medium, the instrument comprising an instrument shaft, and an electrode assembly at one end of the shaft, the electrode assembly comprising a tissue treatment electrode and a return electrode which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being exposed at the distal end portion of the instrument, the return electrode having a fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member, and the radio frequency generator having a bipolar output connected to the electrodes, wherein the exposed end of the tissue treatment electrode is constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member.
Claim 24
Dependent Claim
210 words
Electrosurgical apparatus comprising a radio frequency generator and an electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid medium, the instrument comprising an instrument shaft, and an electrode assembly at one end of the shaft, the electrode assembly comprising a tissue treatment electrode and a return electrode which is electrically insulated from the tissue treatment electrode by means of an insulation member, the tissue treatment electrode being exposed at the distal end portion of the instrument, the return electrode having a fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member, and the radio frequency generator having a bipolar output connected to the electrodes, wherein the exposed end of the tissue treatment electrode is constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed within said tissue treatment electrode distally of said insulation member so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member.
Claim 25
Dependent Claim
225 words
An electrosurgical apparatus comprising a radio frequency generator and an electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid medium, the instrument comprising an instrument shaft, and an electrode assembly at one end of the shaft, the electrode assembly comprising a tissue treatment electrode and a return electrode which is electrically insulated from the tissue treatment electrode by an insulation member, the tissue treatment electrode being exposed at the distal end portion of the instrument, the return electrode having an exposed fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member, and the radio frequency generator having a bipolar output connected to the electrodes, wherein the exposed end of the tissue treatment electrode is constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed only within said tissue treatment electrode so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and wherein the radio frequency generator includes a control means for varying the output power delivered to the electrodes.
Claim 26
Dependent Claim
225 words
An electrosurgical apparatus comprising a radio frequency generator and an electrosurgical instrument for the treatment of tissue in the presence of an electrically-conductive fluid medium, the instrument comprising an instrument shaft, and an electrode assembly at one end of the shaft, the electrode assembly comprising a tissue treatment electrode and a return electrode which is electrically insulated from the tissue treatment electrode by an insulation member, the tissue treatment electrode being exposed at the distal end portion of the instrument, the return electrode having an exposed fluid contact surface spaced proximally from the exposed end of the tissue treatment electrode by the insulation member, and the radio frequency generator having a bipolar output connected to the electrodes, wherein the exposed end of the tissue treatment electrode is constructed from at least one length of material shaped so that portions of said at least one length of material are sufficiently close to one another to form a plurality of pockets for trapping electrically-conductive fluid and vapour to thereby reduce power required to achieve vaporisation, said plurality of pockets being formed only within said tissue treatment electrode so as to not be formed as part of a fluid delivery channel or formed using portions of said insulation member, and wherein the radio frequency generator includes a control means for varying the output power delivered to the electrodes.
Claim 27
Dependent Claim
53 words
The electrosurgical apparatus recited in claim 19 wherein the control means is such as to provide output power in first and second output ranges, the first output range being for powering the electrosurgical instrument for tissue desiccation, and the second output range being for powering the electrosurgical instrument for tissue removal by vaporisation.
Claim 28
Dependent Claim
38 words
The electrosurgical apparatus recited in claim 20 wherein the first output range is from about 150 volts to 200 volts, and the second output range is from about 250 volts to 600 volts, the voltages being peak voltages.
References Cited (Backward Citations)
US33925A
Cited
US164184A
Cited
DE222207C
Cited
US1952617A
Cited
US1366756A
Cited
US1735271A
Cited
US1814791A
Cited
US1889609A
Cited
US1932258A
Cited
US1943543A
Cited
US1983669A
Cited
US2056377A
Cited
US2050904A
Cited
US2196171A
Cited
DE651428C
Cited
CH243478A
Cited
FR57862E
Cited
DE1007960B
Cited
US2888928A
Cited
FR1215305A
Cited
US3035580A
Cited
FR1454773A
Cited
US3460539A
Cited
US3903891A
Cited
US3601126A
Cited
US3595239A
Cited
US3648001A
Cited
US3614414A
Cited
US3685518A
Cited
GB1361497A
Cited
US3707149A
Cited
US3699967A
Cited
US3945375A
Cited
DE2222820A1
Cited
US3815604A
Cited
US3885569A
Cited
US3898991A
Cited
US3801766A
Cited
US3974833A
Cited
US3963030A
Cited
US3845771A
Cited
US3902494A
Cited
US3920021A
Cited
US4016881A
Cited
US3847153A
Cited
US3929137A
Cited
US4011872A
Cited
US3920022A
Cited
US3901242A
Cited
US4033351A
Cited
US3939839A
Cited
US4024467A
Cited
US3923063A
Cited
US3970088A
Cited
US4043342A
Cited
DE2457900C2
Cited
US3964487A
Cited
US4114623A
Cited
US4116198A
Cited
FR2313949B1
Cited
US4119102A
Cited
US4069827A
Cited
US4060088A
Cited
US4040426A
Cited
US4051855A
Cited
US4074718A
Cited
US4092986A
Cited
US4154240A
Cited
US4126137A
Cited
US4281373A
Cited
US4202337A
Cited
GB1583397A
Cited
US4200104A
Cited
US4204549A
Cited
US4271837A
Cited
US4189685A
Cited
US4228800A
Cited
US4210152A
Cited
US4326529A
Cited
US4248231A
Cited
GB2037167A
Cited
US4418692A
Cited
FR2443829A1
Cited
EP0013605B1
Cited
US4669468A
Cited
US4448198A
Cited
DE2930982A1
Cited
US4429698A
Cited
US4494541A
Cited
US4301802A
Cited
US4532924A
Cited
US4346332A
Cited
US4565200A
Cited
EP0049633B1
Cited
US4376263A
Cited
US4674499A
Cited
US4805616A
Cited
US4476862A
Cited
US4562838A
Cited
FR2501034A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-01-10 | 2003-07-12 | 2004-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-01-10 | 2007-07-12 | 2008-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-01-10 | 2011-07-12 | 2012-01-11 | $7700.00 | Window Closed / Lapsed |