Methods and devices for reducing the mineral content of a region of non-intimal vascular tissue

• US 6,755,811 B1
• Filed: 08/25/1999
• Issued: 06/29/2004
• Est. Priority Date: 08/25/1999
• Status: Expired due to Term

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.)
• Original Assignee: Corazon Technologies, Inc. (Cardinal Health, Inc.)
• Inventors: Constantz, Brent R.
• Primary Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US09/382,571
• Time in Patent Office: 1,770 Days
• Field of Search: 604/48, 604/500, 604/506, 604/507, 604/508, 604/509, 604/511, 604/513
• US Class Current: 604/500
• CPC Class Codes: A61B 17/08 Wound clamps or clips, i.e. not or only partly penetrating the tissue suture bridges A61B17/0466; Devices for bringing together the edges of a wound
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61B 2017/00778 Operations on blood vessels A61B2017/22097, A61B2017/320741 take precedence
• CPC Class Codes: A61B 2017/00893 pharmaceutically effective
• CPC Class Codes: A61B 2017/1107 for blood vessels
• CPC Class Codes: A61N 7/00 Ultrasound therapy lithotripsy A61B17/22, A61B17/225; massage using supersonic vibration A61H23/00 ; using ultrasound for introducing media into the body A61M37/0092

Abstract

Methods and devices for reducing the mineral content of a region of non-intimal vascular tissue are provided. In the subject methods, an isolated local environment that includes the region to be demineralized is produced. The pH of the local environment is then reduced to a subphysiologic level, e.g. by flushing with an acidic dissolution fluid, for a period of time sufficient for the mineral content of the region to be reduced. The devices of the subject invention are characterized by comprising a means for producing an isolated local environment that includes a non-intimal region of vascular tissue. Also provided are kits for practicing the subject methods.

Claims

1. A method of reducing the mineral content of a region of non-intimal vascular tissue, said method comprising:

(a) producing an isolated local environment that includes said region;

(b) introducing an acidic dissolution fluid having a subphysiologic pH into said isolated local environment; and

(c) maintaining the isolated local environment of said region at a subphysiologic pH for a period of time sufficient for the mineral content of said region to be reduced so that the mineral content of said region of non-intimal vascular tissue is reduced.

2. The method according to claim 1, wherein said introducing comprises flushing said local environment with said dissolution fluid.

3. The method according to claim 1, wherein said method further comprises applying energy to said region.

4. The method according to claim 1, wherein said mineral is a calcium mineral.

5. The method according to claim 4, wherein said calcium mineral is a calcium phosphate.

6. A method of reducing the calcium phosphate content of a region of non-intimal vascular tissue, said method comprising:

(a) producing an isolated local environment that includes said region; and

(b) flushing said region with an acidic dissolution fluid having a subphysiologic pH capable of increasing the proton concentration in the isolated local environment of said region so that the calcium phosphate content of said region is reduced.

7. The method according to claim 6, wherein said acidic dissolution fluid comprises and an inorganic acid.

8. The method according to claim 7, wherein said inorganic acid is a strong acid.

9. The method according to claim 8, wherein said strong acid is hydrochloric acid.

10. The method according to claim 6, wherein said acidic dissolution fluid is hypertonic.

11. A method for reducing the calcium phosphate content of a region of non-intimal vascular tissue, said method comprising:

producing an isolated local environment comprising said region;

flushing said local environment with an acidic dissolution fluid having a subphysiologic pH for a period of time sufficient to reduce the calcium phosphate content of said region, wherein said acidic dissolution fluid comprises a strong acid so that the calcium phosphate content of said region is reduced.

12. The method according to claim 11, wherein said strong acid is hydrochloric acid.

13. The method according to claim 11, wherein said acidic dissolution fluid is hypertonic.

14. The method according to claim 11, wherein the pH of said acidic dissolution fluid ranges from 0 to 2.

15. The method according to claim 11, wherein said method further comprises applying energy to said calcified region.