CA2578693A1 - Endovascular cryotreatment catheter - Google Patents
Endovascular cryotreatment catheter Download PDFInfo
- Publication number
- CA2578693A1 CA2578693A1 CA002578693A CA2578693A CA2578693A1 CA 2578693 A1 CA2578693 A1 CA 2578693A1 CA 002578693 A CA002578693 A CA 002578693A CA 2578693 A CA2578693 A CA 2578693A CA 2578693 A1 CA2578693 A1 CA 2578693A1
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- CA
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- Prior art keywords
- catheter
- sensor includes
- magnet
- sensor
- fluid
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22001—Angioplasty, e.g. PCTA
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
- A61B2017/22054—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation with two balloons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
- A61B2017/22065—Functions of balloons
- A61B2017/22069—Immobilising; Stabilising
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00214—Expandable means emitting energy, e.g. by elements carried thereon
- A61B2018/0022—Balloons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0212—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument inserted into a body lumen, e.g. catheter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0231—Characteristics of handpieces or probes
- A61B2018/0262—Characteristics of handpieces or probes using a circulating cryogenic fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0231—Characteristics of handpieces or probes
- A61B2018/0262—Characteristics of handpieces or probes using a circulating cryogenic fluid
- A61B2018/0268—Characteristics of handpieces or probes using a circulating cryogenic fluid with restriction of flow
Abstract
An elongated catheter device with a distal balloon assembly is adapted for endovascular insertion. Coolant injected through the device may, in different embodiments, directly cool tissue contacting the balloon, or may cool a separate internal chamber. Plural balloons may be provided, wherein a secondary outer balloon surrounds a primary inner balloon, the primary balloon being filled with coolant and acting as the cooling chamber, the secondary balloon being coupled to a vacuum return lumen to serve as a robust leak containment device and thermal insulator around the cooling chamber. One or more sensors may be disposed between the balloons or the vacuum return lumen, to detect leaks and control the flow of fluid through the device. Examples of sensors include pressure and temperature sensors, optical sensors, magnetic flow switches and flow meters.
Claims (50)
1. A catheter comprising:
a proximal end portion and a distal end portion, the proximal end portion defining at least one fluid inlet port and at least one fluid outlet port;
a first expandable membrane and a second expandable membrane, the first expandable membrane defining a cooling chamber, the second expandable membrane disposed around the first expandable membrane to define an interstitial space therebetween;
a coolant injection lumen in fluid communication with the at least one fluid inlet port and the cooling chamber;
a primary coolant return lumen in fluid communication with the at least one fluid outlet port and the cooling chamber, the coolant injection tube, the cooling chamber, and the primary coolant return lumen defining a first fluid pathway;
a secondary coolant return lumen in fluid communication with the at least one fluid outlet port and the interstitial space, the interstitial space and the secondary coolant return lumen defining a second fluid pathway; and, at least one sensor disposed in the second fluid pathway.
a proximal end portion and a distal end portion, the proximal end portion defining at least one fluid inlet port and at least one fluid outlet port;
a first expandable membrane and a second expandable membrane, the first expandable membrane defining a cooling chamber, the second expandable membrane disposed around the first expandable membrane to define an interstitial space therebetween;
a coolant injection lumen in fluid communication with the at least one fluid inlet port and the cooling chamber;
a primary coolant return lumen in fluid communication with the at least one fluid outlet port and the cooling chamber, the coolant injection tube, the cooling chamber, and the primary coolant return lumen defining a first fluid pathway;
a secondary coolant return lumen in fluid communication with the at least one fluid outlet port and the interstitial space, the interstitial space and the secondary coolant return lumen defining a second fluid pathway; and, at least one sensor disposed in the second fluid pathway.
2. The catheter of claim 1, wherein the at least one sensor is disposed in the interstitial space.
3. The catheter of claim 2, wherein the at least one sensor includes a pressure sensor.
4. The catheter of claim 2, wherein the at least one sensor includes an optical sensor.
5. The catheter of claim 4, wherein the optical sensor includes a Fabry-Perot interferometer.
6. The catheter of claim 4, wherein the optical sensor includes microbend fibers.
7. The catheter of claim 2, wherein the at least one sensor includes a temperature sensor.
8. The catheter of claim 2, wherein the at least one sensor includes a flow switch.
9. The catheter of claim 8, wherein the flow switch includes:
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
10. The catheter of claim 2, wherein the at least one sensor includes a flow meter.
11. The catheter of claim 1, wherein the at least one sensor is disposed in the secondary coolant return lumen.
12. The catheter of claim 11, wherein the at least one sensor includes a pressure sensor.
13. The catheter of claim 11, wherein the at least one sensor includes an optical sensor.
14. The catheter of claim 13, wherein the optical sensor includes a Fabry-Perot interferometer.
15. The catheter of claim 13, wherein the optical sensor includes microbend fibers.
16. The catheter of claim 11, wherein the at least one sensor includes a temperature sensor.
17. The catheter of claim 11, wherein the at least one sensor includes a flow switch.
18. The catheter of claim 17, wherein the flow switch includes:
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
19. The catheter of claim 11, wherein the at least one sensor includes a flow meter.
20. The catheter of claim 1 wherein the at least one fluid inlet port is coupled in fluid communication with a source of coolant, and the at least one fluid outlet port is coupled in fluid communication with a source of vacuum.
21. A catheter system, comprising:
a coolant supply and a source of vacuum;
a catheter having:
a proximal end portion and a distal end portion, the proximal end portion defining at least one fluid outlet port coupled to the source of vacuum;
a first expandable member and a second expandable member, the first expandable member being expandable to define a cooling chamber therein, the second expandable member being disposed around the first expandable member to define an interstitial space between the first and second members, the cooling chamber being in fluid communication with the coolant supply;
a coolant return lumen fluidly connecting the at least one fluid outlet port and the interstitial space, the coolant return lumen being in fluid communication with the source of vacuum, the interstitial space and the secondary coolant return lumen defining a fluid pathway isolated from the cooling chamber; and, at least one sensor disposed in the fluid pathway.
a coolant supply and a source of vacuum;
a catheter having:
a proximal end portion and a distal end portion, the proximal end portion defining at least one fluid outlet port coupled to the source of vacuum;
a first expandable member and a second expandable member, the first expandable member being expandable to define a cooling chamber therein, the second expandable member being disposed around the first expandable member to define an interstitial space between the first and second members, the cooling chamber being in fluid communication with the coolant supply;
a coolant return lumen fluidly connecting the at least one fluid outlet port and the interstitial space, the coolant return lumen being in fluid communication with the source of vacuum, the interstitial space and the secondary coolant return lumen defining a fluid pathway isolated from the cooling chamber; and, at least one sensor disposed in the fluid pathway.
22. The catheter system of claim 21, wherein the at least one sensor is disposed in the interstitial space.
23. The catheter system of claim 22, wherein the at least one sensor includes a pressure sensor.
24. The catheter system of claim 22, wherein the at least one sensor includes an optical sensor.
25. The catheter system of claim 24, wherein the optical sensor includes a Fabry-Perot interferometer.
26. The catheter system of claim 24, wherein the optical sensor includes microbend fibers.
27. The catheter system of claim 22, wherein the at least one sensor includes a temperature sensor.
28. The catheter system of claim 22, wherein the at least one sensor includes a flow switch.
29. The catheter system of claim 28, wherein the flow switch includes:
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
30. The catheter system of claim 22, wherein the at least one sensor includes a flow meter.
31. The catheter system of claim 21, wherein the at least one sensor is disposed in the coolant return lumen.
32. The catheter system of claim 31, wherein the at least one sensor includes a pressure sensor.
33. The catheter system of claim 31, wherein the at least one sensor includes an optical sensor.
34. The catheter system of claim 33, wherein the optical sensor includes a Fabry-Perot interferometer.
35. The catheter system of claim 33, wherein the optical sensor includes microbend fibers.
36. The catheter system of claim 31, wherein the at least one sensor includes a temperature sensor.
37. The catheter system of claim 31, wherein the at least one sensor includes a flow switch.
38. The catheter system of claim 37, wherein the flow switch includes:
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
39. The catheter system of claim 31, wherein the at least one sensor includes a flow meter.
40. A catheter leak detection system, comprising:
a catheter having proximal and distal end portions, the proximal end portion defining at least one fluid outlet port coupled to a source of vacuum;
an expandable cooling chamber disposed on the distal end portion and an expandable membrane disposed around the cooling chamber to define an interstitial space therebetween, the cooling chamber being in fluid communication with a coolant supply;
a coolant return lumen fluidly connecting the at least one fluid outlet port and the interstitial space, the coolant return lumen being in fluid communication with the source of vacuum, the interstitial space and the secondary coolant return lumen defining a fluid pathway isolated from the cooling chamber; and, at least one sensor disposed in the fluid pathway detecting the flow of fluid in the fluid pathway.
a catheter having proximal and distal end portions, the proximal end portion defining at least one fluid outlet port coupled to a source of vacuum;
an expandable cooling chamber disposed on the distal end portion and an expandable membrane disposed around the cooling chamber to define an interstitial space therebetween, the cooling chamber being in fluid communication with a coolant supply;
a coolant return lumen fluidly connecting the at least one fluid outlet port and the interstitial space, the coolant return lumen being in fluid communication with the source of vacuum, the interstitial space and the secondary coolant return lumen defining a fluid pathway isolated from the cooling chamber; and, at least one sensor disposed in the fluid pathway detecting the flow of fluid in the fluid pathway.
41. The catheter leak detection system of claim 40, wherein the at least one sensor detects a leak of fluid from the cooling chamber to the fluid pathway.
42. The catheter leak detection system of claim 40, wherein the at least one sensor detects a leak of fluid through the expandable membrane.
43. The catheter leak detection system of claim 40, wherein the at least one sensor includes a pressure sensor.
44. The catheter leak detection system of claim 40, wherein the at least one sensor includes an optical sensor.
45. The catheter leak detection system of claim 44, wherein the optical sensor includes a Fabry-Perot interferometer.
46. The catheter leak detection system of claim 44, wherein the optical sensor includes microbend fibers.
47. The catheter leak detection system of claim 40, wherein the at least one sensor includes a temperature sensor.
48. The catheter leak detection system of claim 40, wherein the at least one sensor includes a flow switch.
49. The catheter leak detection system of claim 48, wherein the flow switch includes:
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
a first magnet fixed to the catheter;
a second magnet disposed proximate the first magnet, the second magnet being held at a substantially fixed position displaced from the first magnet by the magnetic force between the first and second magnets; and, a detection circuit coupled to the flow switch.
50. The catheter leak detection system of claim 40, wherein the at least one sensor includes a flow meter.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/887,271 US7527622B2 (en) | 1999-08-23 | 2004-07-08 | Endovascular cryotreatment catheter |
US10/887,271 | 2004-07-08 | ||
PCT/US2005/023792 WO2006017073A2 (en) | 2004-07-08 | 2005-07-06 | Endovascular cryotreatment catheter |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2578693A1 true CA2578693A1 (en) | 2006-02-16 |
CA2578693C CA2578693C (en) | 2012-05-15 |
Family
ID=35839713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2578693A Active CA2578693C (en) | 2004-07-08 | 2005-07-06 | Endovascular cryotreatment catheter |
Country Status (4)
Country | Link |
---|---|
US (2) | US7527622B2 (en) |
EP (1) | EP1773224B1 (en) |
CA (1) | CA2578693C (en) |
WO (1) | WO2006017073A2 (en) |
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EP1773224A4 (en) | 2009-11-11 |
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