US6047700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems and methods for electrosurgical removal of calcified deposits
Assignee: Arthrocare Corp
•
Filing: 1998-05-22
•
Granted: 2000-04-11
•
Expires: 2018-05-22
Abstract
Abstract The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's heart to remove calcified deposits and fibroid material from valve leaflets. The method of the present invention comprises positioning an electrosurgical probe or catheter adjacent the target site so that one or more electrode terminal(s) are brought into at least partial contact or close proximity with the target heart valve. High frequency voltage is then applied between the electrode terminal(s) and one or more return electrode(s) to volumetrically remove or ablate at least a portion of the calcified material while minimizing damage to the heart valve and substantially preserving the elastic fiber layer of the valve leaflets.
Inventors
- 👤 Philip E. Eggers
- 👤 Hira V. Thapliyal
- 👤 Michael W. Jopling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:29
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B18/042; A61B17/00; A61B17/00234; A61B2017/00292; A61B2017/003; A61B17/22; A61B2017/22038; A61B2018/00053; A61B2018/00107; A61B2018/00119; A61B2018/0016; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00404; A61B2018/00422; A61B2018/00571; A61B2018/00577; A61B2018/00583; A61B18/1206; A61B2018/1213; A61B2018/124; A61B2018/1246; A61B2018/1253; A61B2018/1273; A61B2018/1405; A61B2018/1425; A61B2018/143; A61B2018/1432; A61B2018/1472; A61B18/16; A61B2018/162; A61B90/00; A61B90/36; A61B90/37; A61B2090/378; A61B2090/3782; A61B2218/00; A61B2218/001; A61B2218/007
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
54 words
A method for removing material from cardiac tissue comprising: positioning an electrode terminal in contact with or in close proximity to material attached to cardiac tissue; and applying high frequency voltage to the electrode terminal, the high frequency voltage being sufficient to remove at least a portion of the material from the cardiac tissue.
Claim 2
Independent Claim
54 words
A method for removing material from cardiac tissue comprising: positioning an electrode terminal in contact with or in close proximity to material attached to cardiac tissue; and applying high frequency voltage to the electrode terminal, the high frequency voltage being sufficient to remove at least a portion of the material from the cardiac tissue.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the material comprises a calcified deposit.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein the cardiac tissue comprises a heart valve, wherein the material is removed while substantially maintaining the elasticity of the heart valve.
Claim 5
Dependent Claim
15 words
The method of claim 1 further comprising removing material from cusps of heart valve leaflets.
Claim 6
Dependent Claim
33 words
The method of claim 1 wherein the cardiac tissue comprises commissures of heart valve leaflets, the method further comprising forming an opening in the commissures to enlarge the opening of the heart valve.
Claim 7
Dependent Claim
28 words
The method of claim 1 wherein the cardiac tissue comprises an annulus of a heart valve, the method further comprising removing the heart valve from the patient's body.
Claim 8
Dependent Claim
29 words
The method of claim 1 further comprising applying sufficient high frequency voltage to the electrode terminal to sculpt the cardiac tissue by removing a portion of the cardiac tissue.
Claim 9
Dependent Claim
24 words
The method of claim 1 further comprising volumetrically removing the material from the cardiac tissue in situ while minimizing damage to the cardiac tissue.
Claim 10
Dependent Claim
22 words
The method of claim 1 wherein the positioning step comprises advancing an electrosurgical instrument through a percutaneous penetration in the patient's chest.
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the positioning step comprises advancing an electrosurgical catheter transluminally into the patient's heart.
Claim 12
Dependent Claim
21 words
The method of claim 1 wherein the positioning step comprises introducing an electrosurgical instrument through an opening in the patient's chest.
Claim 13
Dependent Claim
18 words
The method of claim 1 further comprising an electrode array including a plurality of electrically isolated electrode terminals.
Claim 14
Dependent Claim
23 words
The method of claim 1 wherein the electrode terminal comprises a single electrode at or near a distal end of an electrosurgical instrument.
Claim 15
Dependent Claim
30 words
The method of claim 1 further comprising applying a high frequency voltage difference between the electrode terminal and a return electrode located on an external surface of the patient's body.
Claim 16
Dependent Claim
36 words
The method of claim 1 further comprising applying a high frequency voltage difference between the electrode terminal and a return electrode, wherein the return electrode and the electrode terminal are both located on an electrosurgical instrument.
Claim 17
Dependent Claim
15 words
The method of claim 1 further comprising positioning the electrode terminal within electrically conductive fluid.
Claim 18
Dependent Claim
27 words
The method of claim 16 further comprising delivering the electrically conductive fluid to the electrode terminal to substantially surround the electrode terminal with the electrically conductive fluid.
Claim 19
Dependent Claim
33 words
The method of claim 15 further comprising positioning the electrode terminal and the return electrode within electrically conductive fluid to generate a current flow path between the return electrode and the electrode terminal.
Claim 20
Dependent Claim
30 words
The method of claim 12 further comprising independently controlling current flow from at least two of the electrode terminals based on impedance between the electrode terminal and a return electrode.
Claim 21
Dependent Claim
13 words
The method of claim 16 wherein the electrically conductive fluid is isotonic saline.
Claim 22
Dependent Claim
39 words
The method of claim 16 further comprising applying sufficient voltage to the electrode terminal in the presence of the electrically conducting fluid to vaporize at least a portion of the fluid between the electrode terminal and the tissue structure.
Claim 23
Dependent Claim
29 words
The method of claim 21 further comprising accelerating charged particles from the vaporized fluid to the tissue structure to cause dissociation of the molecular bonds within the tissue structure.
Claim 24
Dependent Claim
17 words
A method as in claim 21 further comprising vaporizing said material to prevent formation of material fragments.
Claim 25
Independent Claim
37 words
A method for removing calcified deposits from a heart valve comprising applying sufficient high frequency electrical energy to calcified deposits on a heart valve to remove said calcified deposits without removing adjacent portions of the heart valve.
Claim 26
Independent Claim
37 words
A method for removing calcified deposits from a heart valve comprising applying sufficient high frequency electrical energy to calcified deposits on a heart valve to remove said calcified deposits without removing adjacent portions of the heart valve.
Claim 27
Independent Claim
40 words
A method for removing calcified deposits from a heart valve comprising applying sufficient high frequency electrical energy to calcified deposits on a heart valve to remove said calcified deposits while substantially maintaining the elasticity and structure of the heart valve.
Claim 28
Independent Claim
40 words
A method for removing calcified deposits from a heart valve comprising applying sufficient high frequency electrical energy to calcified deposits on a heart valve to remove said calcified deposits while substantially maintaining the elasticity and structure of the heart valve.
References Cited (Backward Citations)
US3460539A
Cited
US4011872A
Cited
US4033351A
Cited
US4043342A
Cited
US4116198A
Cited
US4040426A
Cited
US4202337A
Cited
US4228800A
Cited
US4326529A
Cited
US4232676A
Cited
US4248231A
Cited
US4532924A
Cited
US4476862A
Cited
US4674499A
Cited
US4381007A
Cited
US4548207A
Cited
US4567890A
Cited
US4682596A
Cited
US4706667A
Cited
US4709698A
Cited
US4765331A
Cited
US4823791A
Cited
US5108391A
Cited
US4998933A
Cited
US5178620A
Cited
US4967765A
Cited
US4955377A
Cited
US5246438A
Cited
US5454809A
Cited
US5125928A
Cited
US5078717A
Cited
US5098431A
Cited
US4976711A
Cited
US5009656A
Cited
US5057105A
Cited
US5222938A
Cited
US5007908A
Cited
US5217457A
Cited
US5078736A
Cited
US5380277A
Cited
US5083565A
Cited
US5122138A
Cited
US5267997A
Cited
US5542928A
Cited
US5433708A
Cited
US5195959A
Cited
US5190517A
Cited
US5330470A
Cited
US5383917A
Cited
US5273524A
Cited
US5697281A
Cited
US5395312A
Cited
US5722975A
Cited
US5197963A
Cited
US5423882A
Cited
US5419767A
Cited
US5697909A
Cited
US5860951A
Cited
US5873855A
Cited
US5683366A
Cited
US5697882A
Cited
US5681282A
Cited
US5697536A
Cited
US5267994A
Cited
US5555883A
Cited
US5429604A
Cited
US5281216A
Cited
US5281218A
Cited
US5370675A
Cited
US5300069A
Cited
US5312400A
Cited
US5314406A
Cited
US5342357A
Cited
US5584872A
Cited
US5676693A
Cited
US5545161A
Cited
US5348554A
Cited
US5579764A
Cited
US5336443A
Cited
US5417687A
Cited
US5766153A
Cited
US5860974A
Cited
US5718701A
Cited
US5807395A
Cited
US5431649A
Cited
US5569242A
Cited
US5647869A
Cited
US5885277A
Cited
US5725524A
Cited
US5609151A
Cited
EP0703461A2
Cited
US5514130A
Cited
US5556397A
Cited
US5643255A
Cited
EP0740926A2
Cited
US5840059A
Cited
EP0754437A3
Cited
US5673695A
Cited
US5700262A
Cited
US5897553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-04-11 | 2003-10-11 | 2004-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-11 | 2007-10-11 | 2008-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-11 | 2011-10-11 | 2012-04-11 | $7700.00 | Window Closed / Lapsed |