US5899899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryosurgical linear ablation structure
Assignee: Medtronic Cryocath LP
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Filing: 1997-07-11
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Granted: 1999-05-04
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Expires: 2017-07-11
Abstract
Abstract A cryogenic catheter includes a flexible member having an elongate, thermally-transmissive region and a cryogenic fluid path through the flexible member to the thermally-transmissive region. The thermally-transmissive region can be deformable from a linear configuration to an arcuate configuration and can include multiple thermally-transmissive elements having a first side exposed to the cryogenic fluid path and a second side exposed to points exterior to the flexible member. The thermally-transmissive elements can be rigid or flexible longitudinal strips. Alternatively, annular, cylindrical, or wedge-shaped metallic structures disposed in a spaced-apart relationship can define the thermally-transmissive region. In other embodiments the thermally-transmissive region is defined by a helical coil that is at least partially embedded in the flexible member. The helical coil can also define at least a portion of the cryogenic fluid path through the flexible member and include a gas expansion or boiling chamber.
Inventors
- 👤 Steven G. Arless
- 👤 Fredric L. Milder
- 👤 Kenneth A. Spector
- 👤 Dan Wittenberger
- 👤 Domenic N. Santoianni
- 👤 Claudia Lueckge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/02; A61B17/00; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00292; A61B2017/00973; A61B2018/00053; A61B2018/00059; A61B2018/00089; A61B2018/00095; A61B2018/0212; A61F; A61F7/00; A61F7/02; A61F2007/0295; A61F2007/0298; A61M; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/0039; A61M25/0029
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A cryogenic cooling structure for use in the body comprising: an elongate, thermally-transmissive region for producing a linear lesion within the body; and a cryogenic fluid path through the elongate, thermally-transmissive region, wherein flow of cryogenic fluid through the thermally-transmissive region causes a plurality of ice-balls to form within the body in a linear array proximate the elongate, thermally-transmissive region, wherein the cryogenic cooling structure has a substantially fixed circumference, and wherein the cryogenic cooling structure is substantially cylindrical and wherein the elongate, thermally-transmissive region includes a thermally-transmissive flexible material that transmits thermal energy through only a portion of the circumference of the cylindrical cryogenic cooling structure.
Claim 2
Dependent Claim
107 words
A cryogenic cooling structure for use in the body comprising: an elongate, thermally-transmissive region for producing a linear lesion within the body; and a cryogenic fluid path through the elongate, thermally-transmissive region, wherein flow of cryogenic fluid through the thermally-transmissive region causes a plurality of ice-balls to form within the body in a linear array proximate the elongate, thermally-transmissive region, wherein the cryogenic cooling structure has a substantially fixed circumference, and wherein the cryogenic cooling structure is substantially cylindrical and wherein the elongate, thermally-transmissive region includes a thermally-transmissive flexible material that transmits thermal energy through only a portion of the circumference of the cylindrical cryogenic cooling structure.
Claim 3
Dependent Claim
26 words
The cryogenic cooling structure of claim 1, wherein the flexible material is supported by a supporting element when cryogenic fluid is flowing through the thermally-transmissive region.
Claim 4
Dependent Claim
14 words
The cryogenic cooling structure of claim 2, wherein the supporting element includes a spring.
Claim 5
Dependent Claim
24 words
The cryogenic cooling structure of claim 1, wherein the thermally-transmissive material comprises a material selected from the group consisting of polyamide, PET, and PTFE.
Claim 6
Dependent Claim
18 words
The cryogenic cooling structure of claim 1, wherein the thermally-transmissive material has a thickness less than 0.006 inches.
Claim 7
Dependent Claim
16 words
The cryogenic cooling structure of claim 1, further comprising an ECG ring proximate the thermally-transmissive region.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-05-03 | 2002-11-02 | 2003-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-03 | 2006-11-02 | 2007-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-03 | 2010-11-02 | 2011-05-04 | $7700.00 | Window Closed / Lapsed |