Patent US6033398A successfully refreshed from Google Patents.
US6033398A
Expired / Lapsed
US
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Method and apparatus for treating venous insufficiency using directionally applied energy
Assignee: VNUS Medical Technologies LLC
•
Filing: 1997-03-04
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Granted: 2000-03-07
•
Expires: 2017-03-04
Abstract
Abstract A catheter introduces electrodes in a vein for a minimally invasive treatment of venous insufficiency by the application of energy to cause selective heating of the vein. The catheter is positioned within the vein to be treated, and the electrodes on the catheter are moved toward one side of the vein. RF energy is applied in a directional manner from the electrodes at the working end of the catheter to cause localized heating and corresponding shrinkage of the adjacent venous tissue, which may include commissures, leaflets and ostia. Fluoroscopy or ultrasound may be used to detect shrinkage of the vein. After treating one section of the vein, the catheter can be repositioned to place the electrodes to treat different sections of the vein until all desired venous valves are repaired and rendered functionally competent.
Inventors
- 👤 Brian E. Farley
- 👤 Michael D. Laufer
- 👤 Dawn A. Henderson
- 👤 Douglas M. Petty
- 👤 Mark P. Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:32
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B17/00; A61B17/00008; A61B17/22; A61B2017/22051; A61B2017/22097; A61B2018/00005; A61B2018/00011; A61B2018/00029; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00083; A61B2018/00107; A61B2018/00154; A61B2018/00214; A61B2018/0022; A61B2018/00267; A61B2018/00273; A61B2018/00279; A61B2018/00285; A61B2018/00315; A61B2018/00345; A61B2018/00404; A61B2018/00482; A61B2018/00488; A61B2018/00636; A61B2018/00696; A61B2018/00702; A61B2018/00744; A61B2018/00755; A61B2018/00773; A61B2018/00791; A61B2018/00797; A61B2018/00821; A61B2018/00875; A61B18/1206; A61B2018/1246; A61B2018/1253; A61B2018/126; A61B2018/1465; A61B2018/1497
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
112 words
A method of applying energy to cause shrinkage of a vein lumen, the method comprising the steps of: introducing a catheter having a working end with an energy application apparatus located at the working end, to a treatment site in the vein lumen; positioning the energy application apparatus adjacent the treatment site in the vein lumen; directionally emitting energy from the energy application apparatus to selectively heat the treatment site and cause shrinkage of a selected area of the vein lumen at the treatment site; and terminating the emission of energy from the energy application apparatus after causing sufficient shrinkage of the vein lumen to restore valvular competency while maintaining venous patency.
Claim 2
Independent Claim
112 words
A method of applying energy to cause shrinkage of a vein lumen, the method comprising the steps of: introducing a catheter having a working end with an energy application apparatus located at the working end, to a treatment site in the vein lumen; positioning the energy application apparatus adjacent the treatment site in the vein lumen; directionally emitting energy from the energy application apparatus to selectively heat the treatment site and cause shrinkage of a selected area of the vein lumen at the treatment site; and terminating the emission of energy from the energy application apparatus after causing sufficient shrinkage of the vein lumen to restore valvular competency while maintaining venous patency.
Claim 3
Dependent Claim
20 words
The method of claim 1 further comprising the step of determining the occurrence of shrinkage of the vein using fluoroscopy.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein the step of positioning the energy application apparatus at the treatment site further includes the step of placing the energy application apparatus at a commissure of a venous valve of the treatment site.
Claim 5
Dependent Claim
40 words
The method of claim 3 further including the step of positioning the energy application apparatus adjacent leaflets of the valve, after the step of placing the energy application apparatus at the commissure of the venous valve of the treatment site.
Claim 6
Dependent Claim
50 words
The method of claim 1 wherein the step of directionally emitting energy further includes the step of producing at least two discrete RF fields at the working end of the catheter by the energy application apparatus to directionally heat at least two separated venous sites at the treatment site simultaneously.
Claim 7
Dependent Claim
42 words
The method of claim 1 wherein the step of directionally emitting energy further includes the step of producing a discrete RF field along a portion of the circumference of the catheter by the energy application apparatus to directionally heat the venous tissue.
Claim 8
Dependent Claim
37 words
The method of claim 6 wherein the step of producing the discrete RF field includes the step of positioning the catheter to treat the commissure of the venous valve, and then the leaflets of the venous valve.
Claim 9
Dependent Claim
41 words
The method of claim 1 wherein the step for directionally emitting energy comprises the step of passing radio frequency energy between a positive polarity electrode and a negative polarity electrode to create an RF field along a portion of the catheter.
Claim 10
Dependent Claim
26 words
The method of claim 1 wherein the step of directionally emitting energy comprises the step of directionally emitting optical energy to selectively heat the treatment site.
Claim 11
Dependent Claim
41 words
The method of claim 9 wherein the step of directionally emitting optical energy comprises the further step of reflecting optical energy at the working end of the catheter to create a directional emission of energy for selectively heating the treatment site.
Claim 12
Dependent Claim
27 words
The method of claim 1 further comprising the step of palpating the vein into apposition with the energy application apparatus of the catheter in the vein lumen.
Claim 13
Dependent Claim
39 words
The method of claim 1 further comprising the steps of locating the working end of the catheter in apposition with the vein wall adjacent a selected commissure and directionally emitting energy to the vein wall to shrink the commissure.
Claim 14
Dependent Claim
46 words
The method of claim 1 further comprising the step of expanding the energy application apparatus radially outward from the working end and into apposition with the vein wall and directionally emitting energy to the vein wall to cause preferential shrinkage of venous tissue at the wall.
Claim 15
Dependent Claim
71 words
The method of claim 13 wherein the step of expanding comprises the step of expanding at least two pairs of electrodes from the working end into apposition with the vein wall, wherein each pair of electrodes comprises a discrete pair of opposite polarity electrodes and the electrodes within each discrete pair are arranged such that an electrode in one discrete pair is adjacent a like polarity electrode of the adjacent pair.
Claim 16
Dependent Claim
79 words
The method of claim 14 wherein the step of expanding comprises the step of expanding an even number of electrodes into apposition with the vein wall, wherein said even number comprises at least four, and wherein said even number of electrodes are disposed in a plurality of discrete pairs of opposite polarity electrodes, said electrodes in each discrete pair being arranged such that an electrode in one discrete pair is adjacent a like polarity electrode of an adjacent pair.
Claim 17
Dependent Claim
21 words
The method of claim 1 further comprising the step of determining the occurrence of shrinkage of the vein using ultrasonographic imaging.
Claim 18
Dependent Claim
41 words
The method of claim 1 wherein the step of positioning the energy application apparatus at the treatment site further includes the step of placing the energy application apparatus at an ostium and applying energy to reduce the size of the ostium.
Claim 19
Independent Claim
114 words
A method of applying energy to cause the shrinkage of a vein to restore valvular competency, the method comprising the steps of: introducing a catheter having a working end and at least two electrodes located at the working end, to a treatment site in the vein; positioning the at least two electrodes adjacent venous tissue at the treatment site in the vein; applying high frequency energy from the electrodes to heat the treatment site and cause a reduction in the size of the vein; and terminating the application of energy from the electrodes after the size of the vein is reduced so that valvular competency is restored and patency of the vein is maintained.
Claim 20
Independent Claim
114 words
A method of applying energy to cause the shrinkage of a vein to restore valvular competency, the method comprising the steps of: introducing a catheter having a working end and at least two electrodes located at the working end, to a treatment site in the vein; positioning the at least two electrodes adjacent venous tissue at the treatment site in the vein; applying high frequency energy from the electrodes to heat the treatment site and cause a reduction in the size of the vein; and terminating the application of energy from the electrodes after the size of the vein is reduced so that valvular competency is restored and patency of the vein is maintained.
Claim 21
Dependent Claim
20 words
The method of claim 18 further comprising the step of determining the occurrence of shrinkage of the vein using fluoroscopy.
Claim 22
Dependent Claim
21 words
The method of claim 18 further comprising the step of determining the occurrence of shrinkage of the vein using ultrasonographic imaging.
Claim 23
Dependent Claim
28 words
The method of claim 18 wherein the step of applying high frequency energy further includes the step of applying radio frequency energy between the at least two electrodes.
Claim 24
Dependent Claim
38 words
The method of claim 18 wherein the step of emitting high frequency energy further includes the step of producing a discrete RF field along a portion of the circumference of the catheter to directionally heat the venous tissue.
Claim 25
Dependent Claim
37 words
The method of claim 22 wherein the step of producing the discrete RF field includes the step of positioning the catheter to treat the commissures of the venous valve, and then the leaflets of the venous valve.
Claim 26
Dependent Claim
41 words
The method of claim 18 wherein the step of positioning the at least two electrodes at the treatment site further includes the step of placing the at least two electrodes at a commissure of the venous valve of the treatment site.
Claim 27
Dependent Claim
37 words
The method of claim 24 further including the step of placing the electrodes adjacent the leaflets of the valve after the step of placing the electrodes at the commissure of the venous valve of the treatment site.
Claim 28
Dependent Claim
51 words
The method of claim 18 wherein the step of emitting energy further includes the step of producing at least two discrete RF fields along the circumference of the catheter to directionally heat the venous tissue so that both commissures of the venous valve at the treatment site can be treated simultaneously.
Claim 29
Dependent Claim
25 words
The method of claim 18 further comprising the step of extending the electrodes away from the catheter to increase the effective diameter of the catheter.
Claim 30
Dependent Claim
29 words
The method of claim 27 further comprising the step of deploying an expandable member coupled to the working end to selectively position the two electrodes against selected venous tissue.
Claim 31
Dependent Claim
71 words
The method of claim 28 wherein the step of extending comprises the step of expanding at least two pairs of electrodes from the working end into apposition with the vein wall, wherein each pair of electrodes comprises a discrete pair of opposite polarity electrodes and the electrodes within each discrete pair are arranged such that an electrode in one discrete pair is adjacent a like polarity electrode of the adjacent pair.
Claim 32
Dependent Claim
79 words
The method of claim 29 wherein the step of expanding comprises the step of expanding an even number of electrodes into apposition with the vein wall, wherein said even number comprises at least four, and wherein said even number of electrodes are disposed in a plurality of discrete pairs of opposite polarity electrodes, said electrodes in each discrete pair being arranged such that an electrode in one discrete pair is adjacent a like polarity electrode of an adjacent pair.
Claim 33
Dependent Claim
25 words
The method of claim 18 further comprising the step of palpating the vein into apposition with the electrodes of the catheter in the vein lumen.
Claim 34
Dependent Claim
39 words
The method of claim 18 further comprising the steps of locating the working end of the catheter in apposition with the vein wall adjacent a selected commissure and directionally emitting energy to the vein wall to shrink the commissure.
Claim 35
Dependent Claim
41 words
The method of claim 18 wherein the step of positioning the energy application apparatus at the treatment site further includes the step of placing the energy application apparatus at an ostium and applying energy to reduce the size of the ostium.
References Cited (Backward Citations)
US373399A
Cited
US659409A
Cited
US833759A
Cited
US985865A
Cited
US3230957A
Cited
US3301258A
Cited
US3557794A
Cited
US4043338A
Cited
US3920021A
Cited
US4016886A
Cited
US4119102A
Cited
US4312364A
Cited
US4154246A
Cited
US4346715A
Cited
US4522205A
Cited
EP0189329A2
Cited
EP0205851B1
Cited
DE3516830A1
Cited
US4658836A
Cited
US4660571A
Cited
US4699147A
Cited
US4776349A
Cited
US4643186A
Cited
US4664120A
Cited
US5057106A
Cited
US4823812A
Cited
US4709698A
Cited
US5397339A
Cited
US5215103A
Cited
US4765331A
Cited
US4807620A
Cited
US5010894A
Cited
US4966597A
Cited
US4945912A
Cited
WO1990007303A1
Cited
US5454809A
Cited
US5098431A
Cited
US5078717A
Cited
US5057107A
Cited
US4979948A
Cited
US4976711A
Cited
US5035694A
Cited
US5117828A
Cited
US5098429A
Cited
US5122137A
Cited
US5188602A
Cited
WO1992012681A1
Cited
US5156151A
Cited
US5465717A
Cited
US5449381A
Cited
US5275610A
Cited
US5190517A
Cited
US5255678A
Cited
US5383917A
Cited
US5263493A
Cited
US5370677A
Cited
US5370678A
Cited
US5314466A
Cited
WO1993021846A1
Cited
US5429130A
Cited
US5281218A
Cited
US5411025A
Cited
EP0629382A1
Cited
US5293869A
Cited
WO1994007446A1
Cited
US5545161A
Cited
WO1994021170A1
Cited
US5607422A
Cited
US5405346A
Cited
US5403312A
Cited
US5405322A
Cited
US5431649A
Cited
US5409000A
Cited
WO1995010322A1
Cited
WO1995010236A1
Cited
WO1995010978A1
Cited
US5472441A
Cited
US5437664A
Cited
US5556396A
Cited
US5423815A
Cited
US5447529A
Cited
US5462545A
Cited
US5458596A
Cited
WO1995031142A1
Cited
US5505730A
Cited
US5514130A
Cited
EP0738501A1
Cited
US5868740A
Cited
WO1996032885A1
Cited
US5626578A
Cited
US5709224A
Cited
US5810804A
Cited
US5863290A
Cited
US5817092A
Cited
WO1997017892A1
Cited
US5827268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-03-07 | 2003-09-06 | 2004-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-03-07 | 2007-09-06 | 2008-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-03-07 | 2011-09-06 | 2012-03-07 | $7700.00 | Window Closed / Lapsed |