Device for introducing a stent into a hollow organ

• US 7,727,269 B2
• Filed: 02/25/2005
• Issued: 06/01/2010
• Est. Priority Date: 02/26/2004
• Status: Active Grant

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Abraham-Fuchs, Klaus, Reinschke, Johannes, Fuchs, Friedrich, Kuth, Rainer, Roeckelein, Rudolf, Ries, Guenter
• Primary Examiner(s): Casler; Brian
• Assistant Examiner(s): CHAO, ELMER M
• Application Number:
  US11/064,858
• Publication Number:
  US 20050192660A1
• Time in Patent Office: 1,922 Days
• Field of Search: 600/178, 600/104, 600/116, 600/101, 600/129, 623/1.11
• US Class Current: 623/1.11
• CPC Class Codes: A61B 1/00158 using magnetic field
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 2034/732 arranged around the patient, e.g. in a gantry
• CPC Class Codes: A61B 34/73 Manipulators for magnetic surgery
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/044 Oesophagi or esophagi or gullets
• CPC Class Codes: A61F 2210/009 magnetic

Abstract

A device is for introducing a stent into a hollow organ, in particular into the gastrointestinal tract of the body of a patient. The device includes a magnet system which covers the area of treatment of the patient and generates a 3D gradient field for remote-controlled movement and orientation of an endorobot. The endorobot is provided with a linear magnet and is freely movable in the hollow organ. Further, the stent, which can be uncoupled from the outside, is secured to the endorobot in a folded-down state so that it can be brought to the site of use and can there be opened out so as to bear firmly on the wall of the hollow organ.

Claims

1. A device for introducing a stent into a hollow organ, comprising:

an endorobot including a linear magnet, the endorobot adapted to be freely movable in the hollow organ, wherein a stent, uncoupleable from the outside, is secured to the endorobot in a folded-down state and, at a site of use, is adapted to be opened so as to bear firmly on a wall of the hollow organ;

a magnet system which covers an area of treatment of a patient and generates a 3D gradient field for remote-controlled movement and orientation of the endorobot; and

a coupling mechanism within the endorobot, the coupling mechanism being configured to release the stent secured to the endorobot, wherein the coupling mechanism includes a coupling magnet and a piezo-stack, the coupling mechanism being connected to a hook configured to hold the stent and the coupling mechanism is configured to release the stent upon receipt of a current pulse acting on the piezo-stack.

2. The device as claimed in claim 1, wherein the stent is at least substantially non-magnetic.

3. The device as claimed in claim 1, wherein the endorobot contains a bar magnet.

4. The device as claimed in claim 1, wherein the endorobot contains a controllable and at least approximately linear coil.

5. The device as claimed in claim 1, wherein the magnet system includes a static basic field for compensation of a gravitational force acting on the endorobot.

6. The device as claimed in claim 1, wherein the magnet system includes a superconducting basic field magnet.

7. The device as claimed in claim 5, wherein the static basic field is controllable so as to compensate for weight changes of the endorobot when loaded and unloaded.

8. The device as claimed in claim 1, wherein the patient and the magnet system are movable relative to one another.

9. The device as claimed in claim 1, further comprising a support table configured to receive a patient, the support table being adjustable within the magnet system.

10. The device as claimed in claim 1, wherein the endorobot includes a lighting device for illuminating its surroundings.

11. The device as claimed in claim 1, wherein the endorobot is equipped with a video camera.

12. The device as claimed in claim 1, wherein the endorobot includes locating means for allowing the position to be presented on a screen showing an anatomical environment.

13. The device as claimed in claim 1, wherein an in-built accumulator is used to power the endorobot and is rechargeable via an external alternating field.

14. The device as claimed in claim 1, wherein the endorobot includes a helicopter mode in which, by regulation of the gradient field via detection by the transponder, it remains stationary or is moved a predetermined distance.

15. The device as claimed in claim 1, further comprising an input unit configured to control the endorobot in such a way that forces acting on the input unit correspond to or are proportional to forces acting on the endorobot.

16. The device as claimed in claim 1, wherein the endorobot is configured to be controllable via a 6D mouse.

17. The device as claimed in claim 1, wherein the stent is adapted to be folded up resiliently, and the fixing connection is releasable from outside.

18. The device as claimed in claim 1, wherein the stent comprises a shape-memory material and is heated above the transition temperature in order to open out.

19. The device as claimed in claim 18, wherein the heating is effected by way of a current pulse which is at least one of supplied via the coupling to the endorobot and fed in inductively from outside.

20. The device as claimed in claim 1, wherein the stent is at least one of made of a material, and coated with a material.

21. The device as claimed in claim 1, wherein the stent is coated with a medicament.

22. The device as claimed in claim 1, wherein the device is configured to introduce the stent into a gastrointestinal tract of a patient.

23. The device as claimed in claim 1, wherein the magnet system includes a superconducting basic field magnet, composed of a high-temperature superconductor.

24. The device as claimed in claim 20, wherein the material is biocompatible.

25. The device as claimed in claim 21, wherein the medicament is one that dissolves slowly.

26. A device for introducing a stent into a hollow organ, comprising:

an endorobot including a linear magnet and adapted to be movable in the hollow organ, wherein a stent, uncoupleable from the outside, is adapted to be secured to the endorobot in a folded-down state and is adapted to be opened so as to bear firmly on a wall of the hollow organ;

a magnet system, adapted to at least partially cover an area of treatment of a patient and adapted to generate a field for remote-controlled movement and orientation of the endorobot; and

a coupling mechanism within the endorobot, the coupling mechanism being configured to release the stent secured to the endorobot, wherein the coupling mechanism includes a coupling magnet and a piezo-stack, the coupling mechanism being connected to a hook configured to hold the stent and the coupling mechanism is configured to release the stent upon receipt of a current pulse acting on the piezo-stack.

27. The device as claimed in claim 26, wherein the stent is at least substantially non-magnetic.