Method and system for mounting an MPS sensor on a catheter

• US 7,881,769 B2
• Filed: 04/07/2003
• Issued: 02/01/2011
• Est. Priority Date: 11/18/2002
• Status: Active Grant

• Current Assignee: ST JUDE MEDICAL INTERNATIONAL HOLDING S. R.L.
• Original Assignee: MediGuide Ltd (Abbott Laboratories Incorporated)
• Inventors: Sobe, Lior
• Primary Examiner(s): Casler; Brian
• Assistant Examiner(s): LAMPRECHT, JOEL
• Application Number:
  US10/408,156
• Publication Number:
  US 20040097804A1
• Time in Patent Office: 2,857 Days
• Field of Search: 600/424, 600/427, 600/429, 600/117, 600/409, 600/407, 600/114, 600/118, 600/300, 600/317, 600/479, 600481-488, 600460-463, 600/410, 600/100, 600/160, 128/196, 604 49- 53, 604508-522
• US Class Current: 600/424
• CPC Class Codes: A61B 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 2017/00252 for by-pass connections, i.e. connections from heart chamber to blood vessel or from blood vessel to blood vessel
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2034/2072 Reference field transducer attached to an instrument or patient
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

Catheter for performing a medical operation on an organic lumen, the catheter including an elongated member, a medical operational element located at a distal end of the elongated member, an electromagnetic field detector located at the distal end, and a wiring for coupling the electromagnetic field detector with a medical positioning system, wherein the medical positioning system determines the position and orientation of the distal end.

Claims

1. Catheter for performing a medical operation on an organic lumen, the catheter comprising:

an elongated member comprising substantially flexible material;

a medical operational element located at a distal end of said elongated member;

an electromagnetic field detector located at said distal end, said electromagnetic field detector operative to detect an electromagnetic field generated by a medical positioning system that is proximal of said elongated member distal end; and

a wiring for coupling said electromagnetic field detector with said medical positioning system, said wiring operative to transmit a signal respective of said detected electromagnetic field to said medical positioning system, said wiring being separate and isolated from said medical operational element and from said electromagnetic field detector, said wiring embedded within substantially the entirety of said elongated member between said medical positioning system and said electromagnetic field detector such that said wiring is positioned within the wall of said elongated member and is surrounded, in said embedded portion, by said substantially flexible material of said elongated member,

wherein said medical positioning system determines the position and orientation of said distal end, relative to a reference coordinate system, according to said transmitted signal, and

wherein said elongated member has a mechanical property of one of rigidity, elasticity, and plasticity, and wherein said mechanical property of the part of said elongated member between said medical positioning system and said electromagnetic field detector where said wiring is embedded is increased or decreased due to said mechanical property of said wiring, irrespective of any modified mechanical property resulting from said medical operational element or from said electromagnetic field detector, such that the increase or decrease in said mechanical property of the part of said elongated member between said medical positioning system and said electromagnetic field detector where said wiring is embedded enhances the maneuverability of said catheter within said organic lumen throughout the stages of;

insertion of said catheter into the organic lumen, performance of the medical operation with said medical operational element, and removal of said catheter from the organic lumen.

2. Position and orientation determination system comprising:

a guiding catheter;

a guiding catheter electromagnetic field detector located at a guiding catheter distal end of said guiding catheter, said guiding catheter electromagnetic field detector being coupled with a medical positioning system; and

at least one medical catheter located within said guiding catheter, said at least one medical catheter comprising;

an elongated member comprising substantially flexible material;

a medical operational element located at least one medical catheter distal end of a respective one of said at least one medical catheter;

a medical catheter electromagnetic field detector located at said at least one medical catheter distal end, said medical catheter electromagnetic field detector operative to detect an electromagnetic field generated by said medical positioning system that is proximal of said elongated member distal end, and

a wiring for coupling said medical catheter electromagnetic field detector with said medical positioning system, said wiring operative to transmit a signal respective of said detected electromagnetic field to said medical positioning system, said wiring being separate and isolated from said medical operational element and from said electromagnetic field detector, said wiring embedded within substantially the entirety of said elongated member between said medical positioning system and said electromagnetic field detector such that said wiring is positioned within the wall of said elongated member and is surrounded, in said embedded portion, by said substantially flexible material of said elongated member, said elongated member having a mechanical property of one of rigidity, elasticity, and plasticity, and wherein said mechanical property of the part of said elongated member between said medical positioning system and said electromagnetic field detector where said wiring is embedded is increased or decreased due to said mechanical property of said wiring irrespective of any modified mechanical property resulting from said medical operational element or from said electromagnetic field detector, such that the increase or decrease in said mechanical property of the part of said elongated member between said medical positioning system and said electromagnetic field detector where said wiring is embedded enhances the maneuverability of said catheter within said organic lumen throughout the stages of;

insertion of said catheter into the organic lumen, performance of the medical operation with said medical operational element, and removal of said catheter from the organic lumen,

wherein said medical positioning system determines the position and orientation of said at least one medical catheter distal end, relative to a reference coordinate system, according to said transmitted signal, and

wherein said medical positioning system determines the position and orientation of said guiding catheter distal end.

3. A catheter for performing a medical operation on an organic lumen, comprising:

an elongated member having proximal and distal ends, said elongated member comprising substantially flexible material;

a medical operational element located at said distal end;

an electromagnetic field detector located at said distal end configured to detect an electromagnetic field generated by a medical positioning system and produce a signal respective of said detected field, said medical positioning system being configured to determine a position and orientation of said detector, relative to a reference coordinate system, according to said signal;

a wiring, different from said medical operational element and said field detector, coupled to said detector for transmitting said signal, said wiring being embedded within and along at least a part of said elongated member extending away from said distal end such that said wiring is positioned within the wall of said elongated member and is surrounded, in said embedded portion, by said substantially flexible material of said elongated member said elongated member having a mechanical property, and wherein said mechanical property of said part of said elongated member where said wiring is embedded is increased or decreased due to said wiring;

wherein said wiring along at least said part of said elongated member has a form selected from the group comprising a straight form, a first spiral form having a substantially constant pitch, a second spiral form having a plurality of pitches, and a combination form having one or more of the foregoing.

4. The catheter of claim 3 wherein said elongated member includes a guidewire lumen for a guidewire to pass therethrough.

5. The catheter of claim 4 wherein said electromagnetic field detector is located at a side of said guidewire lumen.

6. The catheter of claim 4 wherein said electromagnetic field detector is in form of a coil which surrounds at least a portion of said guidewire lumen.

7. The catheter of claim 4 wherein said electromagnetic field detector is wound around a core comprising magnetically-permeable material, said electromagnetic field detector being located proximal to said guidewire lumen proximal end.

8. The catheter of claim 3 wherein said mechanical property is selected from the group consisting of:

pushability;

trackability;

rigidity;

elasticity;

plasticity;

flexibility;

modulus of elasticity; and

coefficient of rigidity.

9. The catheter of claim 3 wherein said wiring takes said combination form wherein at least a portion of said wiring is wound in a spiral form having a pitch of at least one value, along the length of said elongated member, and wherein at least another portion of said wiring is substantially straight along the length of said elongated member.

10. The catheter of claim 3 wherein said wiring is coated with an electrically shielding coating.

11. The catheter of claim 3 wherein said wiring comprises one of twisted pair conductors, coaxial conductors and triaxial conductors.

12. The catheter of claim 3 wherein said wiring comprises first and second conductors, said first electrical conductor being embedded within said elongated member along a first path, said second electrical conductor being embedded within said elongated member along a second path, and wherein said first path and said second path substantially lie on a plane, said plane substantially passing through the longitudinal axis of said elongated member, and wherein said first path and second path are substantially equally spaced from said longitudinal axis.

13. The catheter of claim 3 wherein a first electrical conductor of said wiring, a second electrical conductor of said wiring, and a support element, are all embedded within said elongated member in substantially straight lines, and

wherein said first electrical conductor, said second electrical conductor and said support element substantially lie equally apart on a circle, said circle being substantially concentric with it longitudinal axis in a lateral cross section of said elongated member.

14. The catheter of claim 3 further comprising a radiopaque marker embedded within said elongated member at said distal end.

15. The catheter of claim 3 wherein said medical operational element is selected from the group consisting of:

balloon;

stent;

balloon expanding stent;

laser;

cryogenic fluid unit;

electric impulse unit;

cutting balloon;

rotational atherectomy unit;

directional atherectomy unit;

transluminal extraction unit;

coated stent;

drug delivery balloon;

brachytherapy unit;

valve;

suturing device;

implant;

biological marker;

radiopaque marker;

substance delivery device;

imaging device;

diagnostic device;

miniature camera;

infrared camera;

optical coherence tomography;

magnetic resonance imaging;

ultrasound; and

sensor.

16. The catheter of claim 15 wherein said stent comprises a shape memory alloy material.

17. The catheter of claim 3 wherein said catheter further comprises a transmitter, said transmitter being coupled to a proximal end of said wiring;

and

wherein said transmitter wirelessly couples said electromagnetic field detector with said medical positioning system.

18. The catheter of claim 3 further comprising a shielding covering at least a portion of said electromagnetic field detector, wherein said shielding is of such physical dimensions and properties, that said shielding shields said electromagnetic field detector against at least one electromagnetic field source.

19. A system for determining position and orientation, comprising:

a guiding catheter;

a guiding catheter electromagnetic field detector located at a guiding catheter distal end of said guiding catheter, said guiding catheter electromagnetic field detector being coupled with a medical positioning system; and

at least one medical catheter located within said guiding catheter, said at least one medical catheter comprising;

an elongated member having medical catheter proximal and distal ends, said elongated member comprising substantially flexible material;

a medical operational element located at said medical catheter distal end;

an medical catheter electromagnetic field detector located at said medical catheter distal end configured to detect an electromagnetic field generated by said medical positioning system and produce a signal respective of said detected field, said medical positioning system being configured to determine a position and orientation of said medical catheter field detector, relative to a reference coordinate system, according to said signal;

a wiring, different from said medical operational element and said medical catheter field detector, coupled to said medical catheter field detector for transmitting said signal, said wiring being embedded within and along at least a part of said elongated member extending away from said medical catheter distal end such that said wiring is positioned within the wall of said elongated member and is surrounded, in said embedded portion, by said substantially flexible material of said elongated member, said elongated member having a mechanical property, and wherein said mechanical property of said part of said elongated member where said wiring is embedded is increased or decreased due to said wiring;

wherein said wiring along at least said part of said elongated member takes a form selected from the group comprising a straight form, a first spiral form having a substantially constant pitch, a second spiral form having a plurality of pitches and a combination form having one or more of the foregoing.

20. The system of claim 19 wherein said guiding catheter electromagnetic field detector is located within a wall of said guiding catheter.

21. The system of claim 19 wherein said elongated member includes a guidewire lumen for a guidewire to pass therethrough.