US6135997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating hemorrhoids
Assignee: VNUS Medical Technologies LLC
•
Filing: 1998-11-16
•
Granted: 2000-10-24
•
Expires: 2018-11-16
Abstract
Abstract A catheter delivers an electrode within a vein for a minimally invasive treatment of hemorrhoids using RF energy. The catheter is introduced into a patient and positioned within the section of the vein to be treated. The electrode radiates high frequency energy towards the vein, and the surrounding venous tissue becomes heated and begins to shrink. The catheter includes a controllable member for limiting the amount of shrinkage of the vein to the diameter of the member. The electrode remains active until there has been sufficient shrinkage of the vein. The extent of shrinkage of the vein can be detected by fluoroscopy. After treating one section of the vein, the catheter and the electrode can be repositioned within the hemorrhoidal venous system to treat different sections until all desired venous sections and valves are repaired and rendered functionally competent. Shrinkage of the vein further thickens and stiffens the vein wall which reduces the potential for the hemorrhoid vein to dilate.
Inventors
- 👤 Michael D. Laufer
- 👤 Brian E. Farley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B18/08; A61B17/00; A61B17/22; A61B2017/22051; A61B2017/22097; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00083; 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; A61B2018/00755; 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: 75
Claim 1
Independent Claim
101 words
A method of applying energy to cause shrinkage of a dilated vein for treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and means for heating located at the working end, to a treatment site in a vein; positioning the means for heating at the treatment site in the vein; applying energy from the means for heating to heat the treatment site and cause shrinkage of the vein; terminating the emission of energy from the means for heating after sufficient shrinkage of the vein so as to reduce the hemorrhoid while the vein remains patent.
Claim 2
Independent Claim
101 words
A method of applying energy to cause shrinkage of a dilated vein for treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and means for heating located at the working end, to a treatment site in a vein; positioning the means for heating at the treatment site in the vein; applying energy from the means for heating to heat the treatment site and cause shrinkage of the vein; terminating the emission of energy from the means for heating after sufficient shrinkage of the vein so as to reduce the hemorrhoid while the vein remains patent.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the step of introducing the catheter includes the step of advancing the catheter through the iliac vein.
Claim 4
Dependent Claim
41 words
The method of claim 1, wherein the step of positioning the means for heating at the treatment site further includes the step of placing the means for heating at the treatment site so that heating of the venous valve is minimized.
Claim 5
Dependent Claim
31 words
The method of claim 1, wherein the step of positioning the means for heating further includes the step of arranging the means for heating for achieving circumferential shrinkage of the vein.
Claim 6
Dependent Claim
34 words
The method of claim 1, wherein the step of positioning the means for heating further includes the step of moving the means for heating into apposition with the vein wall at the treatment site.
Claim 7
Dependent Claim
66 words
The method of claim 1, wherein the step of positioning further includes the step of increasing an effective diameter of the catheter to place the means for heating into apposition with the vein wall; and the step of applying energy further includes the step of reducing the effective diameter of the catheter so as to maintain apposition with the vein wall as the vein wall shrinks.
Claim 8
Dependent Claim
26 words
The method of claim 1, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein to a selected diameter.
Claim 9
Dependent Claim
32 words
The method of claim 1, wherein the step of applying energy further includes the step of controlling the energy from the means for heating so as to minimize coagulation in the vein.
Claim 10
Dependent Claim
39 words
The method of claim 1, wherein the step of applying energy further includes the step of controlling the energy from the means for heating so as to control the spread of heating at the treatment site of the vein.
Claim 11
Dependent Claim
18 words
The method of claim 1, further comprising the step of determining the extent of shrinkage of the vein.
Claim 12
Dependent Claim
20 words
The method of claim 10, further comprising the step of determining the extent of shrinkage of the vein using fluoroscopy.
Claim 13
Dependent Claim
27 words
The method of claim 1, further comprising the steps of positioning the means for heating at a second treatment site; and repeating the applying and terminating steps.
Claim 14
Independent Claim
100 words
A method of applying energy to cause the shrinkage of a dilated vein for treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and an electrode located at the working end, to a treatment site in the vein; positioning the electrode at the treatment site in the vein; applying radio frequency energy from the electrode to heat the treatment site and cause shrinkage of the vein; terminating the applying of radio frequency energy from the electrode after sufficient shrinkage of the vein so as to reduce the hemorrhoids while that the vein remains patent.
Claim 15
Independent Claim
100 words
A method of applying energy to cause the shrinkage of a dilated vein for treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and an electrode located at the working end, to a treatment site in the vein; positioning the electrode at the treatment site in the vein; applying radio frequency energy from the electrode to heat the treatment site and cause shrinkage of the vein; terminating the applying of radio frequency energy from the electrode after sufficient shrinkage of the vein so as to reduce the hemorrhoids while that the vein remains patent.
Claim 16
Dependent Claim
24 words
The method of claim 13, wherein the step of introducing the catheter includes the step of advancing the catheter through the external iliac vein.
Claim 17
Dependent Claim
37 words
The method of claim 13, wherein the step of positioning the electrode at the treatment site further includes the step of placing the electrode at the treatment site so as to minimize heating of the venous valve.
Claim 18
Dependent Claim
36 words
The method of claim 13, wherein the step of positioning the electrode further includes the step of arranging a plurality of electrodes on the catheter for achieving circumferential shrinkage of the vein and minimizing axial shortening.
Claim 19
Dependent Claim
62 words
The method of claim 13, wherein the step of positioning further comprises the step of inflating a balloon with an inflation medium so that the balloon engages the vein; wherein the step of applying energy further includes the step of heating the inflation medium by the heating means, wherein the treatment site is heated by the conduction of heat from the balloon.
Claim 20
Dependent Claim
30 words
The method of claim 13, wherein the step of positioning the electrode further includes the step of moving the electrode into apposition with the vein wall at the treatment site.
Claim 21
Dependent Claim
33 words
The method of claim 13, wherein the step of positioning further includes the step of deflecting an elongate member to place the electrode in apposition with the vein wall at the treatment site.
Claim 22
Dependent Claim
46 words
The method of claim 13, wherein the step of positioning further includes the step of inflating a balloon on the catheter to engage an elongate member, wherein the elongate member is deflected to place the electrode in apposition with the vein wall at the treatment site.
Claim 23
Dependent Claim
37 words
The method of claim 13, wherein the step of positioning the electrode at the treatment site further includes the step of inflating a balloon on the catheter to move the electrode into apposition with the vein wall.
Claim 24
Dependent Claim
39 words
The method of claim 13, wherein the step of positioning further includes the step of moving a deflection wire through the catheter to deflect the catheter and the electrode to one side of the vein at the treatment site.
Claim 25
Dependent Claim
50 words
The method of claim 13, wherein the step of positioning further includes the step of actuating a deflection wire on one side of the catheter so as to move the catheter and the electrode on the side of the catheter opposite the deflection wire to one side of the vein.
Claim 26
Dependent Claim
50 words
The method of claim 13, wherein the step of positioning further includes the step of inflating a balloon on one side of the catheter so as to move the catheter and the electrode on the other side of the catheter to one side of the vein at the treatment site.
Claim 27
Dependent Claim
31 words
The method of claim 13, wherein the step of positioning further includes the step of inflating a balloon on the catheter to center the catheter and the electrode within the vein.
Claim 28
Dependent Claim
26 words
The method of claim 13, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein to a selected diameter.
Claim 29
Dependent Claim
43 words
The method of claim 13, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein by inflating a balloon to a selected diameter; wherein the inflated balloon prevents shrinkage of the vein beyond the selected diameter.
Claim 30
Dependent Claim
76 words
The method of claim 13, wherein the step of positioning the electrode further includes the step of placing the electrode into apposition with the vein wall; and the step of applying energy further includes the step of reducing an effective diameter of the catheter in a controlled manner so as to maintain apposition with the vein wall as the vein wall shrinks until a diameter for the vein is achieved, wherein the vein continues to function.
Claim 31
Dependent Claim
84 words
The method of claim 13, wherein the step of positioning the electrode further includes the step of placing the electrode into apposition with the vein by increasing an effective diameter of the catheter, wherein the shrinkage of the vein reduces the effective diameter of the catheter; and the step of limiting the shrinkage of the vein further includes the step of preventing the effective diameter of the catheter from being reduced to less than a selected diameter representing the sufficient shrinkage of the vein.
Claim 32
Dependent Claim
33 words
The method of claim 13, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein to the fixed diameter of the catheter at the working end.
Claim 33
Dependent Claim
61 words
The method of claim 13, wherein the electrode includes a plurality of longitudinal electrodes, and the step of applying the high frequency energy further includes the step of providing the high frequency energy to the longitudinal electrodes along the circumference of the working end of the catheter; wherein the vein is shrunk circumferentially and axial shrinkage of the vein is minimized.
Claim 34
Dependent Claim
41 words
The method of claim 13, wherein the electrode is a ring electrode, and the step of applying the high frequency energy further includes the step of providing radio frequency energy to the ring electrode at the working end of the catheter.
Claim 35
Dependent Claim
33 words
The method of claim 13, wherein the step of applying the high frequency energy further includes the step of providing an inert tip at the working end of the catheter past the electrode.
Claim 36
Dependent Claim
22 words
The method of claim 13, further comprising the step of delivering a cooling fluid to the treatment site for preventing thermal coagulation.
Claim 37
Dependent Claim
18 words
The method of claim 13, further comprising the step of determining the extent of shrinkage of the vein.
Claim 38
Dependent Claim
20 words
The method of claim 13, further comprising the step of determining the extent of shrinkage of the vein using fluoroscopy.
Claim 39
Dependent Claim
21 words
The method of claim 13, further comprising the step of determining the extent of shrinkage of the vein using ultrasound imaging.
Claim 40
Dependent Claim
36 words
The method of claim 13, further comprising the step of determining when to terminate the applying of radio frequency energy by measuring the time at which a specific temperature has been achieved at the treatment site.
Claim 41
Independent Claim
108 words
A method of applying energy to cause shrinkage of a vein for restoring the competency of a venous valve in treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and means for heating located at the working end, to a treatment site in a vein; positioning the means for heating at the treatment site in the vein; applying energy from the means for heating to heat the treatment site and cause shrinkage of the vein; terminating the emission of energy from the means for heating after sufficient shrinkage of the vein so as to restore venous valve competency and reduce the hemorrhoids.
Claim 42
Independent Claim
108 words
A method of applying energy to cause shrinkage of a vein for restoring the competency of a venous valve in treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and means for heating located at the working end, to a treatment site in a vein; positioning the means for heating at the treatment site in the vein; applying energy from the means for heating to heat the treatment site and cause shrinkage of the vein; terminating the emission of energy from the means for heating after sufficient shrinkage of the vein so as to restore venous valve competency and reduce the hemorrhoids.
Claim 43
Independent Claim
104 words
A method of applying energy to cause the shrinkage of a vein for restoring the competency of a venous valve in treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and an electrode located at the working end, to a treatment site in the vein; positioning the electrode at the treatment site in the vein; applying high frequency energy from the electrode to heat the treatment site and cause shrinkage of the vein; terminating the application of energy from the electrode after sufficient shrinkage of the vein so as to restore venous valve competency and reduce the hemorrhoids.
Claim 44
Independent Claim
104 words
A method of applying energy to cause the shrinkage of a vein for restoring the competency of a venous valve in treating hemorrhoids, the method comprising the steps of: introducing a catheter having a working end and an electrode located at the working end, to a treatment site in the vein; positioning the electrode at the treatment site in the vein; applying high frequency energy from the electrode to heat the treatment site and cause shrinkage of the vein; terminating the application of energy from the electrode after sufficient shrinkage of the vein so as to restore venous valve competency and reduce the hemorrhoids.
Claim 45
Dependent Claim
23 words
The method of claim 40, wherein the step of introducing the catheter includes the step of advancing the catheter through the iliac vein.
Claim 46
Dependent Claim
37 words
The method of claim 40, wherein the step of positioning the electrode at the treatment site further includes the step of placing the electrode at the treatment site so as to minimize heating of the venous valve.
Claim 47
Dependent Claim
32 words
The method of claim 40, wherein the step of positioning the electrode at the treatment site further includes the step of placing the electrode across the venous valves at the treatment site.
Claim 48
Dependent Claim
43 words
The method of claim 40, wherein the step of positioning the electrode at the treatment site further includes the step of introducing the catheter retrograde to venous flow and advancing the catheter to the cusps of the venous valves at the treatment site.
Claim 49
Dependent Claim
36 words
The method of claim 40, wherein the step of positioning the electrode further includes the step of arranging a plurality of electrodes on the catheter for achieving circumferential shrinkage of the vein and minimizing axial shortening.
Claim 50
Dependent Claim
62 words
The method of claim 40, wherein the step of positioning further comprises the step of inflating a balloon with an inflation medium so that the balloon engages the vein; wherein the step of applying energy further includes the step of heating the inflation medium by the heating means, wherein the treatment site is heated by the conduction of heat from the balloon.
Claim 51
Dependent Claim
30 words
The method of claim 40, wherein the step of positioning the electrode further includes the step of moving the electrode into apposition with the vein wall at the treatment site.
Claim 52
Dependent Claim
38 words
The method of claim 40, wherein the step of positioning further includes the step of deflecting an elongate member radially outward from the catheter to place the electrode in apposition with the vein wall at the treatment site.
Claim 53
Dependent Claim
41 words
The method of claim 40, wherein the step of positioning further includes the step of inflating a balloon on the catheter to deflect an elongate member, wherein the electrode is placed in apposition with the vein wall at the treatment site.
Claim 54
Dependent Claim
36 words
The method of claim 40, wherein the step of positioning further includes the step of inflating a balloon on the catheter to deflect move the electrode into contact with the vein wall at the treatment site.
Claim 55
Dependent Claim
39 words
The method of claim 40, wherein the step of positioning further includes the step of moving a deflection wire through the catheter to deflect the catheter and the electrode to one side of the vein at the treatment site.
Claim 56
Dependent Claim
48 words
The method of claim 40, wherein the step of positioning further includes the step of actuating a deflection wire on one side of the catheter to move the catheter and the electrode on the side of the catheter opposite the deflection wire to one side of the vein.
Claim 57
Dependent Claim
52 words
The method of claim 40, wherein the step of positioning further includes the step of inflating a balloon on one side of the catheter so as to move the catheter, and the electrode on the side of the catheter opposite the balloon, to one side of the vein at the treatment site.
Claim 58
Dependent Claim
31 words
The method of claim 40, wherein the step of positioning further includes the step of inflating a balloon on the catheter to center the catheter and the electrode within the vein.
Claim 59
Dependent Claim
26 words
The method of claim 40, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein to a selected diameter.
Claim 60
Dependent Claim
43 words
The method of claim 40, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein by inflating a balloon to a selected diameter; wherein the inflated balloon prevents shrinkage of the vein beyond the selected diameter.
Claim 61
Dependent Claim
76 words
The method of claim 40, wherein the step of positioning the electrode further includes the step of placing the electrode into apposition with the vein wall; and the step of applying energy further includes the step of reducing an effective diameter of the catheter in a controlled manner so as to maintain contact with the vein wall as the vein wall shrinks, until a selected diameter for the vein is achieved for restoring venous valve competency.
Claim 62
Dependent Claim
84 words
The method of claim 40, wherein the step of positioning the electrode further includes the step of placing the electrode into apposition with the vein by increasing an effective diameter of the catheter, wherein the shrinkage of the vein reduces the effective diameter of the catheter; and the step of limiting the shrinkage of the vein further includes the step of preventing the effective diameter of the catheter from being reduced to less than a selected diameter representing the sufficient shrinkage of the vein.
Claim 63
Dependent Claim
33 words
The method of claim 40, wherein the step of applying energy further includes the step of limiting the shrinkage of the vein to the fixed diameter of the catheter at the working end.
Claim 64
Dependent Claim
35 words
The method of claim 40, wherein the step of applying energy further includes the step of controlling the frequency of the energy from the electrode so as to minimize coagulation of blood in the vein.
Claim 65
Dependent Claim
40 words
The method of claim 40, wherein the step of applying energy further includes the step of controlling the frequency of the energy from the electrode so as to control the spread of heating at the treatment site of the vein.
Claim 66
Dependent Claim
42 words
The method of claim 40, wherein the step of applying energy further includes the step of controlling the frequency and total power of the energy so as to cause the external wall of the hemorrhoidal vein to become affixed to adjacent tissue.
Claim 67
Dependent Claim
41 words
The method of claim 40, wherein the step of applying the high frequency energy further includes the step of providing the high frequency energy to a plurality of longitudinal electrodes located around the circumference of the working end of the catheter.
Claim 68
Dependent Claim
33 words
The method of claim 40, wherein the step of applying the high frequency energy further includes the step of providing an inert tip at the working end of the catheter past the electrode.
Claim 69
Dependent Claim
25 words
The method of claim 40, further comprising the step of delivering a cooling fluid into the vein near the treatment site for preventing thermal coagulation.
Claim 70
Dependent Claim
18 words
The method of claim 40, further comprising the step of determining the extent of shrinkage of the vein.
Claim 71
Dependent Claim
20 words
The method of claim 40, further comprising the step of determining the extent of shrinkage of the vein using fluoroscopy.
Claim 72
Dependent Claim
25 words
The method of claim 40, further comprising the step by infusing radiopaque contrast solution through the catheter lumen to assess valve competence via descending venography.
Claim 73
Dependent Claim
21 words
The method of claim 40, further comprising the step of determining the extent of shrinkage of the vein using ultrasound imaging.
Claim 74
Dependent Claim
50 words
The method of claim 40, further comprising the step of determining when to terminate the applying of radio frequency energy by measuring the time at which a specific temperature has been achieved at the treatment site using a temperature sensor located on the electrode in contact with the vein wall.
Claim 75
Dependent Claim
31 words
The method of claim 70, further comprising the step of providing a filtering circuit to eliminate radio frequency noise from a temperature signal from the temperature sensor located on the electrode.
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
US4672962A
Cited
EP0189329A2
Cited
US4660571A
Cited
US4699147A
Cited
US4776349A
Cited
US4748979A
Cited
US4643186A
Cited
US4664120A
Cited
US4823812A
Cited
US4709698A
Cited
US5397339A
Cited
US5215103A
Cited
US4765331A
Cited
US4823791A
Cited
US4936842A
Cited
US4807620A
Cited
US5010894A
Cited
US4966597A
Cited
US4945912A
Cited
US5454809A
Cited
US5057107A
Cited
US5078717A
Cited
US4979948A
Cited
US4976711A
Cited
US5035694A
Cited
US5117828A
Cited
US5098429A
Cited
US5122137A
Cited
US5188602A
Cited
WO1992012681A1
Cited
US5449381A
Cited
US5156151A
Cited
US5465717A
Cited
US5275610A
Cited
US5190517A
Cited
US5255678A
Cited
US5383917A
Cited
US5263493A
Cited
US5370677A
Cited
US5370678A
Cited
US5314466A
Cited
WO1993021846A1
Cited
US5281218A
Cited
US5411025A
Cited
EP0629382A1
Cited
US5293869A
Cited
WO1994007446A1
Cited
US5545161A
Cited
WO1994021170A1
Cited
US5405346A
Cited
WO1995002370A2
Cited
US5403312A
Cited
US5405322A
Cited
US5431649A
Cited
US5409000A
Cited
WO1995010236A1
Cited
WO1995010322A1
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
US5570692A
Cited
US5709224A
Cited
US5810804A
Cited
US5863290A
Cited
US5897553A
Cited
US5817092A
Cited
WO1997017892A1
Cited
US5891134A
Cited
US5827268A
Cited
US5879347A
Cited
US6014589A
Cited
US6024742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-10-24 | 2004-04-24 | 2004-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-24 | 2008-04-24 | 2008-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-24 | 2012-04-24 | 2012-10-24 | $7700.00 | Window Closed / Lapsed |