WO1997038637B1 - A moisture transport system for contact electrocoagulation - Google Patents
A moisture transport system for contact electrocoagulationInfo
- Publication number
- WO1997038637B1 WO1997038637B1 PCT/US1997/005927 US9705927W WO9738637B1 WO 1997038637 B1 WO1997038637 B1 WO 1997038637B1 US 9705927 W US9705927 W US 9705927W WO 9738637 B1 WO9738637 B1 WO 9738637B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carrying member
- electrodes
- electrode carrying
- tissue
- ablation
- Prior art date
Links
- 238000009297 electrocoagulation Methods 0.000 title 1
- 238000002679 ablation Methods 0.000 claims abstract 25
- 210000001519 tissues Anatomy 0.000 claims abstract 25
- 230000015271 coagulation Effects 0.000 claims 2
- 238000005345 coagulation Methods 0.000 claims 2
- 238000006297 dehydration reaction Methods 0.000 claims 2
- 239000004744 fabric Substances 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- 210000004291 Uterus Anatomy 0.000 claims 1
- 238000005273 aeration Methods 0.000 claims 1
- 230000001112 coagulant Effects 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 239000006260 foam Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 239000002250 absorbent Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 210000000056 organs Anatomy 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Abstract
An apparatus and method for use in performing ablation of organs and other tissue includes an electrode carrying member which is substantially absorbent and/or permeable to moisture. The electrode carrying member is mounted to the distal end of an elongate shaft, and an array of electrodes is mounted to the surface of the electrode carrying member. Following placement of the ablation device into contact with the tissue to be ablated, an RF generator is used to deliver RF energy to the electrodes and to thereby induce current flow from the electrodes to tissue to be ablated. As the current heats the tissue, moisture (such as water vapor or liquid) leaves the tissue causing the tissue to dehydrate. The moisture permeability and/or absorbency of the electrode carrying member allows the moisture to leave the ablation site so as to prevent the moisture from providing a path of conductivity for the current.
Claims
1. A method of ablating and/or coagulating tissue, comprising the steps of:
(a) providing an electrode carrying member with electrodes thereon;
(b) positioning the electrodes in contact with tissue to be ablated;
(c) passing current through the electrodes to the tissue to cause the tissue to dehydrate; and
(d) permitting moisture generated during the dehydration of step (c) to pass into the electrode carrying member and away from the tissue.
2. The method of claim 1 wherein the tissue has a surface and wherein step (b) includes the step of causing the electrode carrying member to conform to the shape of the tissue surface.
3. The method of claim 1 wherein step (a) includes providing an elongate tube and wherein the step of providing the electrode carrying member includes providing the electrode carrying member on a distal portion of the tube, and wherein step (d) includes the step of permitting at least a portion of the moisture to pass from the electrode carrying member through the tube .
4. The method of claim 3 wherein step (d) includes the step of applying suction to the tube to draw the moisture through the tube.
5. The method of claim 1 wherein the method further includes the step of (e) automatically terminating the flow of current into the tissue once ablation has approximately reached a predetermined depth or level of dehydration.
6. The method of claim 1 wherein the method further includes the steps of:
(e) monitoring the impedance of the tissue undergoing ablation; and
(f) terminating the ablation procedure once the impedance has reached a predetermined level.
7. The method of claim 1 wherein step (c) includes the step of passing current through select ones of the electrodes.
8. The method of claim 1 including the step of applying suction through the electrode carrying means to draw the tissue into contact with the electrode carrying means and the electrodes to facilitate moisture removal.
9. An ablation and/or coagulation apparatus for use in delivering energy to tissue for ablation, the apparatus comprising: a moisture permeable and/or absorbable electrode carrying member; electrodes mounted to the electrode carrying member; means for delivering radio frequency energy to the electrodes; and means capable of drawing moisture into and through the electrode carrying member.
10. An ablation and/or coagulation apparatus for use in delivering energy to tissue for ablation, the apparatus comprising: a moisture permeable and/or absorbable electrode carrying member; electrodes mounted to the electrode carrying member; means for delivering radio frequency energy to the electrodes; and an elongate tube, wherein the electrode carrying member is mounted to the tube, and wherein the tube includes a plurality of aeration openings underlying the electrode carrying member.
11. The apparatus of claim 9 wherein the means capable of drawings moisture includes suction means for drawing moisture away from the electrode carrying member.
12. The apparatus of claim 9 wherein the apparatus further comprises an elongate tube, wherein the electrode carrying member is mounted to the tube, and wherein the means capable of drawings moisture includes suction means for drawing moisture through the tube away from the electrode carrying member.
13. The apparatus of claim 9 wherein the electrode carrying member is formed of sponge.
14. The apparatus of claim 9 wherein the electrode carrying member is formed of foam.
15. The apparatus of claim 9 wherein the electrode carrying member is formed of a porous filler material. 1
16. The apparatus of claim 9 wherein the electrode carrying member is further formed of conformable material .
17. The ablation apparatus of claim 9 further comprising structural support means within the electrode carrying member.
18. The ablation apparatus of claim 17 wherein the structural support means includes an inflatable balloon.
19. The ablation apparatus of claim 17 wherein the structural support means comprises spring members positioned within the electrode carrying member.
20. The ablation apparatus of claim 19 wherein the spring members are moveable between a closed condition and an opened condition.
21. The ablation apparatus of claim 9 further comprising at least one contact sensor carried by the electrode carrying member and means for measuring impedance.
22. An apparatus for intrauterine ablation, comprising: an elongate tube; an electrode carrying pad mounted to the tube and shaped to approximate the shape of a uterus; an array of electrodes mounted to the pad; means for delivering RF energy to the electrodes to cause current flow from the electrodes to tissue to be ablated; and means for automatically terminating the flow of current from the electrodes to the tissue once a predetermined ablation depth has been substantially reached.
23. The apparatus of claim 22 further comprising means for drawing moisture from tissue undergoing ablation into the electrode carrying pad.
24. A method of ablating tissue, comprising the steps of :
(a) providing an electrode carrying member with electrodes thereon;
(b) positioning the electrodes in contact with tissue to be ablated;
(c) selecting a depth to which ablation is to be carried out; and
(d) delivering RF energy to the tissue through select ones of the electrodes to cause ablation of the tissue to approximately the selected ablation depth.
25. The method of claim 24 wherein step (d) includes the step of selecting an effective electrode spacing which would produce ablation to approximately the desired ablation depth, and delivering RF energy to select ones of the electrodes such that the spacing between the energized electrodes is substantially the selected effective electrode spacing.
26. The method of claim 24 wherein step (d) includes the step of selecting an electrode surface density which will produce ablation to approximately the desired ablation depth, and delivering RF energy to select ones of the electrodes such that the electrode surface density of the energized electrodes is substantially the selected electrode surface density.
27. The apparatus of claim 9 wherein the electrode carrying member and electrodes are formed of a metallized fabric.
28. The apparatus of claim 27 wherein the metallized fabric includes insulating layers etched thereon to separate the electrodes.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9708644-4A BR9708644A (en) | 1996-04-12 | 1997-04-10 | Moisture transport system for contact electrocoagulation |
DE69733556T DE69733556T2 (en) | 1996-04-12 | 1997-04-10 | MOISTURE SUPPLY SYSTEM FOR TOUCH ELECTROCOPAGLATION |
CA002251216A CA2251216A1 (en) | 1996-04-12 | 1997-04-10 | A moisture transport system for contact electrocoagulation |
JP53720297A JP3942639B2 (en) | 1996-04-12 | 1997-04-10 | Moisture transport system for contact electrocoagulation |
AT97917166T ATE297696T1 (en) | 1996-04-12 | 1997-04-10 | MOISTURE PROMOTION SYSTEM FOR TOUCH ELECTROCOAGULATION |
IL12647197A IL126471A0 (en) | 1996-04-12 | 1997-04-10 | A moisture transport system for contact electrocoagulation |
EP97917166A EP0898465B1 (en) | 1996-04-12 | 1997-04-10 | A moisture transport system for contact electrocoagulation |
AU25585/97A AU721648B2 (en) | 1996-04-12 | 1997-04-10 | A moisture transport system for contact electrocoagulation |
NO984741A NO984741L (en) | 1996-04-12 | 1998-10-09 | Humidity transport system for contact electrocoagulation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/632,516 US5769880A (en) | 1996-04-12 | 1996-04-12 | Moisture transport system for contact electrocoagulation |
US08/632,516 | 1996-04-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1997038637A1 WO1997038637A1 (en) | 1997-10-23 |
WO1997038637B1 true WO1997038637B1 (en) | 1997-11-20 |
Family
ID=24535818
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/005927 WO1997038637A1 (en) | 1996-04-12 | 1997-04-10 | A moisture transport system for contact electrocoagulation |
Country Status (13)
Country | Link |
---|---|
US (1) | US5769880A (en) |
EP (2) | EP1415607B1 (en) |
JP (1) | JP3942639B2 (en) |
KR (1) | KR20000005488A (en) |
CN (1) | CN1220590A (en) |
AT (2) | ATE297696T1 (en) |
AU (1) | AU721648B2 (en) |
BR (1) | BR9708644A (en) |
CA (1) | CA2251216A1 (en) |
DE (2) | DE69733556T2 (en) |
IL (1) | IL126471A0 (en) |
NO (1) | NO984741L (en) |
WO (1) | WO1997038637A1 (en) |
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-
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- 1996-04-12 US US08/632,516 patent/US5769880A/en not_active Expired - Lifetime
-
1997
- 1997-04-10 WO PCT/US1997/005927 patent/WO1997038637A1/en active IP Right Grant
- 1997-04-10 IL IL12647197A patent/IL126471A0/en unknown
- 1997-04-10 CA CA002251216A patent/CA2251216A1/en not_active Abandoned
- 1997-04-10 DE DE69733556T patent/DE69733556T2/en not_active Expired - Lifetime
- 1997-04-10 DE DE69739697T patent/DE69739697D1/en not_active Expired - Lifetime
- 1997-04-10 KR KR1019980708271A patent/KR20000005488A/en not_active Application Discontinuation
- 1997-04-10 CN CN97195178A patent/CN1220590A/en active Pending
- 1997-04-10 AT AT97917166T patent/ATE297696T1/en not_active IP Right Cessation
- 1997-04-10 BR BR9708644-4A patent/BR9708644A/en not_active Application Discontinuation
- 1997-04-10 EP EP03079207A patent/EP1415607B1/en not_active Expired - Lifetime
- 1997-04-10 AU AU25585/97A patent/AU721648B2/en not_active Ceased
- 1997-04-10 AT AT03079207T patent/ATE451066T1/en not_active IP Right Cessation
- 1997-04-10 JP JP53720297A patent/JP3942639B2/en not_active Expired - Fee Related
- 1997-04-10 EP EP97917166A patent/EP0898465B1/en not_active Expired - Lifetime
-
1998
- 1998-10-09 NO NO984741A patent/NO984741L/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8961436B2 (en) | 2005-03-04 | 2015-02-24 | St. Jude Medical Luxembourg Holding S.á.r.l. | Medical apparatus system having optical fiber load sensing capability |
US11564628B2 (en) | 2011-04-14 | 2023-01-31 | St. Jude Medical International Holding S.À R.L. | Compact force sensor for catheters |
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