METHOD AND APPARATUS FOR RETAINING MEDICAL IMPLANTS WITHIN BODY VESSELS

• US 20090281521A1
• Filed: 07/20/2009
• Published: 11/12/2009
• Est. Priority Date: 06/04/2003
• Status: Active Grant

• Current Assignee: Nuxcel2 LLC
• Original Assignee: Kevin Holbrook, Michael S. Williams, Richard A. Glenn, Terrance Ransbury
• Inventors: Holbrook, Kevin, Williams, Michael S., Glenn, Richard A., Ransbury, Terrance
• Granted Patent: US 7,840,282 B2
• Time in Patent Office: Days
• US Class Current: 604/509
• CPC Class Codes: A61N 1/057 Anchoring means; Means for fixing the head inside the heart
• CPC Class Codes: A61N 1/37205 Microstimulators, e.g. implantable through a cannula
• CPC Class Codes: A61N 1/37512 Pacemakers
• CPC Class Codes: A61N 1/37516 Intravascular implants
• CPC Class Codes: A61N 1/37518 Anchoring of the implants, e.g. fixation

Abstract

The present application describes a retention device for anchoring a medical device within the vasculature. The device may include expandable member coupled to an intravascular medical device and proportioned for receipt within a vessel. At least a portion of the expandable member is expandable to radially engage a vessel wall and to thereby retain the medical device within the vessel. The system is suitable for a variety of intravascular devices, including but not limited to ICD'"'"'s, pacemakers, and intravascular drug delivery systems.

Claims

1. A method for retaining a medical device within a blood vessel, comprising:

providing an elongate intravascular medical device including a retention device;

with the retention device in a compressed position, positioning the retention device and the medical device in the blood vessel; and

expanding the retention device to an expanded position to retain the medical device within the blood vessel such that the medical device is positioned generally coaxially within the blood vessel.

2. The method of claim 1, further comprising positioning the retention device on the medical device.

3. The method of claim 2, wherein positioning the retention device includes inserting a cuff of the retention device onto the medical device.

4. The method of claim 1, wherein the retention device is integrally formed with the medical device.

5. The method of claim 1, wherein the expanding step includes radially expanding an anchor of the retention device relative to a cuff of the retention device that is positioned around the medical device.

6. The method of claim 5, wherein the expanding step includes radially expanding the anchor such that it is generally coaxial with the cuff.

7. The method of claim 5, wherein the expanding step includes radially expanding the anchor such that it is longitudinally offset from the cuff.

8. The method of claim 1, wherein the elongate intravascular medical device comprises an elongate pulse generator having a generally cylindrical construction with a circular cross-section that forms a hermetically sealed housing containing circuitry and a power supply, the elongate pulse generator being configured to be flexible about a longitudinal axis such that the step of positioning the medical device includes bending of the pulse generator in response to passage of the device through curved regions of the blood vessel.

9. A system, comprising:

an elongate intravascular medical device; and

means for retaining the medical device within a blood vessel of a patient such that the medical device is positioned generally coaxially within the blood vessel.

10. The system of claim 9, wherein the means for retaining is expandable from a compressed configuration to an expanded configuration.

11. The system of claim 9, wherein the means for retaining includes a means for attaching to the medical device and a means for anchoring within the blood vessel.

12. The device of claim 11, wherein the means for retaining is expandable from a compressed configuration to an expanded configuration, and wherein in the expanded configuration the means for attaching and the means for anchoring are generally coaxial.

13. The device of claim 11, wherein the means for retaining is expandable from a compressed configuration to an expanded configuration, and wherein in the expanded configuration the means for attaching and the means for anchoring are longitudinally offset from each other.

14. The device of claim 9, wherein the elongate intravascular medical device comprises an elongate pulse generator having a generally cylindrical construction with a circular cross-section that forms a hermetically sealed housing containing circuitry and a power supply, the elongate pulse generator being configured to be flexible about a longitudinal axis such that the medical device bends in response to passage of the pulse generator through curved regions of the blood vessel.

15. A method for providing a medical device and providing instructions for retaining the medical device within a blood vessel of a patient, comprising:

providing a retention device expandable from a compressed position to an expanded position;

providing an elongate intravascular medical device; and

providing instructions to implant the medical device in the blood vessel of the patient, including;

positioning the medical device in the blood vessel with the retention device positioned on the medical device in the compressed position; and

expanding the retention device to the expanded position to retain the medical device within the blood vessel such that the medical device is positioned generally coaxially with the blood vessel.

16. The method of claim 15, wherein the instructions further comprise positioning the retention device on the medical device.

17. The method of claim 15, wherein the expanding step includes radially expanding an anchor of the retention device relative to a cuff of the retention device that is positioned around the medical device.

18. The method of claim 17, wherein the expanding step includes radially expanding the anchor such that it is generally coaxial with the cuff.

19. The method of claim 17, wherein the expanding step includes radially expanding the anchor such that it is longitudinally offset from the cuff.

20. The method of claim 15, wherein the elongate intravascular medical device comprises an elongate pulse generator having a generally cylindrical construction with a circular cross-section that forms a hermetically sealed housing containing circuitry and a power supply, the elongate pulse generator being configured to be flexible about a longitudinal axis such that the step of positioning the medical device includes bending of the pulse generator in response to passage of the device through curved regions of the blood vessel.