Magnetic resonance imaging interference immune device
First Claim
Patent Images
1. An implantable medical lead having a length that extends from a proximal end configured to be coupled to a medical device to a distal end configured to be implanted in a heart of a patient, the lead comprising:
- an electrode located near the distal end of the lead; and
a conductor in the lead having a distal end proximate the electrode and a proximal end proximate the medical device;
said conductor being coiled;
said conductor having a predetermined spacing between adjacent coils extending along a length of the conductor from the distal end of the conductor to the proximal end of the conductor, said predetermined spacing providing a parasitic capacitance and an inductance, said parasitic capacitance and inductance having a resonance frequency approximately equal to an excitation signal'"'"'s frequency of a magnetic resonance imaging scanner.
4 Assignments
0 Petitions
Accused Products
Abstract
A wire form includes a conductor having a distal end and a proximal end. The conductor is coiled and has a predetermined spacing between adjacent coils. The predetermined spacing provides a parasitic capacitance and an inductance. The parasitic capacitance and inductance have a resonance frequency tuned to about an excitation signal'"'"'s frequency of a magnetic-resonance imaging scanner.
-
Citations
14 Claims
-
1. An implantable medical lead having a length that extends from a proximal end configured to be coupled to a medical device to a distal end configured to be implanted in a heart of a patient, the lead comprising:
-
an electrode located near the distal end of the lead; and a conductor in the lead having a distal end proximate the electrode and a proximal end proximate the medical device; said conductor being coiled;
said conductor having a predetermined spacing between adjacent coils extending along a length of the conductor from the distal end of the conductor to the proximal end of the conductor, said predetermined spacing providing a parasitic capacitance and an inductance, said parasitic capacitance and inductance having a resonance frequency approximately equal to an excitation signal'"'"'s frequency of a magnetic resonance imaging scanner. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A system comprising:
-
an implantable medical device including; a case that includes circuitry housed within the case; and a connector block mounted on the case, wherein the connector block includes at least one receptacle for a lead and an electrical interface to electrically connect the lead with the circuitry of the implantable medical device; and an implantable medical lead including; a proximal end coupled to the receptacle; a distal end; an electrode located near the distal end; and a coiled conductor in the lead having a distal end proximate the electrode and a proximal end proximate the electrical interface to provide an electrical circuit path from the electrode to the circuitry of the implantable medical device; wherein adjacent coils of the coiled conductor have a predetermined spacing to provide a parasitic capacitance and an inductance having a resonance frequency approximately equal to an excitation signal'"'"'s frequency of a magnetic resonance imaging scanner. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. An implantable medical lead having a length that extends from a proximal end configured to be coupled to a medical device to a distal end configured to be implanted in a heart of a patient, the lead comprising:
-
an electrode located near the distal end of the lead; and a coiled conductor that extends substantially the length of the lead such that a proximal end of the conductor is located proximate the medical device and a distal end of the conductor is located proximate the electrode; wherein adjacent coils of the coiled conductor have a predetermined spacing to provide a parasitic capacitance and an inductance having a resonance frequency approximately equal to an excitation signal'"'"'s frequency of a magnetic resonance imaging scanner. - View Dependent Claims (14)
-
Specification