Resonating Stent or Stent Element

• US 20090259284A1
• Filed: 04/10/2008
• Published: 10/15/2009
• Est. Priority Date: 04/10/2008
• Status: Abandoned Application

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Yamasaki, Dwayne S., Neidert, Michael
• Application Number:
  US12/100,574
• Publication Number:
  US 20090259284A1
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2090/397 electromagnetic other than visible, e.g. microwave
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/18 Materials at least partially X-ray or laser opaque
• CPC Class Codes: A61N 1/40 Applying electric fields by inductive or capacitive coupling microwave apparatus A61N5/00; Applying radio-frequency signals
• CPC Class Codes: A61N 2/02 using magnetic fields produced by coils, including single turn loops or electromagnets A61N2/12 takes precedence

Abstract

A tubular member adapted for endovascular delivery in a human patient comprises a tubular wire framework and the tubular wire framework forms the core of a signal device. The signal device further includes a coil, which is wrapped around the core to form an inductor, and a capacitor coupled to the inductor to form an inductor capacitor circuit. The signal device can be excited and signals acquired therefrom to determine the position and/or orientation of the signal device and the tubular member. The relative positions and/or orientations of (1) the signal device and/or the tubular member and (2) a device having a signal generating element or a signal generating element being advanced toward the signal device, tubular member or framework can be monitored. Relative positions and/or orientations of a plurality of signal devices in a tubular wire framework also can be determined after the framework is deployed in a vessel and compared to predetermined positions and/or orientations.

Claims

1. A tubular member adapted for endovascular delivery in a human patient comprising a tubular wire framework, a coil and a capacitor, a portion of said tubular wire framework forms a core and said coil surrounds said core to form an inductor, said capacitor is coupled to said inductor to form an inductor capacitor circuit.

2. The tubular member of claim 1 wherein said wire framework comprises 400 series stainless steel.

3. The tubular member of claim 1 wherein said wire framework comprises a Cobalt Chrome alloy.

4. The tubular member of claim 1 wherein said wire framework comprises tantalum.

5. The tubular member of claim 1 wherein said wire framework comprises a nickel-titanium alloy.

6. The tubular member of claim 1 wherein said wire framework comprises a shape memory alloy.

7. The tubular member of claim 1 wherein said wire framework comprises a platinum-iridium alloy.

8. The tubular member of claim 1 wherein said wire framework comprises a niobium-based alloy.

9. The tubular member of claim 1 wherein said wire framework comprises different materials, and said core comprises ferromagnetic material.

10. The tubular member of claim 1 wherein said tubular member is a stent.

12. The tubular member of claim 1 wherein said tubular member is a stent element.

13. The tubular member of claim 12 further including graft material secured to said stent.

14. The tubular member of claim 1 further including a case that covers said core, coil, and capacitor.

15. An endovascular resonating marker assembly comprising a wire stent, a coil, and a capacitor, said coil being wound about a portion of said wire stent to form an inductor and said capacitor being coupled to said portion to form an inductor capacitor circuit.

16. The endovascular resonating marker assembly of claim 15 wherein said portion comprises magnetic material.

17. The endovascular resonating marker assembly of claim 15 wherein said inductor and capacitor are encapsulated.

19. The endovascular resonating marker assembly of claim 15 wherein said portion comprises magnetic material.

20. The endovascular resonating marker assembly of claim 17 wherein said inductor and capacitor are encapsulated.

18. An endovascular resonating marker assembly comprising a tubular wire stent element, a coil, and a capacitor, said coil being wound about a portion of said wire stent to form an inductor and said capacitor being coupled to said portion to form an inductor capacitor circuit.

21. A method of endovascularly navigating a device to a prosthesis comprising:

positioning in a vessel of a patient a prosthesis comprising a tubular wire framework, a coil and a capacitor, where a portion of the tubular wire framework forms a core, the coil surrounds the core to form an inductor, and the capacitor is coupled to the inductor to form an inductor capacitor circuit signal element;

generating an electromagnetic field in the region of the patient where the prosthesis is positioned;

endovascularly advancing a device having an electromagnetic coil secured thereto toward the prosthesis; and

monitoring the relative positions of the signal element and the electromagnetic coil based on signals emitted therefrom and indicative of their positions.

22. A method of evaluating prosthesis deployment comprising:

endovascularly positioning a prosthesis comprising a tubular wire framework having two resonating markers in a predetermined position;

deploying the prosthesis;

generating an electromagnetic field in the vicinity of the deployed prosthesis to activate the resonating markers so that they emit signals;

determining the position of the markers based on their emitted signals; and

evaluating the determined resonating marker positions as compared to the predetermined marker positions.

23. A method of evaluating prosthesis deployment comprising:

endovascularly positioning a prosthesis comprising a tubular wire framework having two resonating markers in a predetermined orientation;

deploying the prosthesis;

generating an electromagnetic field in the vicinity of the deployed prosthesis to activate the resonating markers so that they emit signals;

determining the orientation of the markers based on their emitted signals; and

evaluating the determined resonating marker orientations as compared to the predetermined marker orientations.

24. The method of claim 23 wherein the predetermined resonating marker orientation corresponds to the resonating markers being approximately parallel.