Lead electrode for use in an MRI-safe implantable medical device
First Claim
Patent Images
1. An implantable medical system, comprising:
- an implantable medical device having a stimulator output point;
an impedance adjusting circuit comprising at least a matching resistor electrically coupled to the stimulator output point;
a conductive lead having a proximal end electrically coupled at least to said matching resistor and having a distal end, the impedance adjusting circuit having an impedance that causes the impedance looking into said stimulator output point to be substantially matched to the characteristic impedance of said lead so that a voltage present across the matching resistor is at a maximum; and
at least one distal therapy electrode proximate the distal end of said lead.
1 Assignment
0 Petitions
Accused Products
Abstract
An implantable stimulation system comprises a stimulator for generating electrical stimulation and a conductive stimulation lead having a proximal end electrically coupled to the stimulator, wherein at least a first component of the impedance looking into the stimulator is substantially matched to the impedance of the stimulation lead. At least one distal stimulation electrode is positioned proximate the distal end of the stimulation lead.
-
Citations
21 Claims
-
1. An implantable medical system, comprising:
-
an implantable medical device having a stimulator output point; an impedance adjusting circuit comprising at least a matching resistor electrically coupled to the stimulator output point; a conductive lead having a proximal end electrically coupled at least to said matching resistor and having a distal end, the impedance adjusting circuit having an impedance that causes the impedance looking into said stimulator output point to be substantially matched to the characteristic impedance of said lead so that a voltage present across the matching resistor is at a maximum; and at least one distal therapy electrode proximate the distal end of said lead. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An implantable medical system, comprising:
-
an implantable medical device having a stimulator output point and having a connector block having an electrical contact; an impedance adjusting circuit comprising at least a matching resistor electrically coupled between the stimulator output point and the electrical contact; a conductive lead having a proximal end electrically coupled to the electrical contact and having a distal end, the impedance adjusting circuit having an impedance that causes the impedance looking into said stimulator output point to be substantially matched to the characteristic impedance of said lead; and at least one distal therapy electrode proximate the distal end of said lead. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. An implantable medical system, comprising:
-
an implantable medical device having a stimulator output point and having a connector block having an electrical contact; an impedance adjusting circuit consisting of a matching resistance electrically coupled between the stimulator output point and the electrical contact; a conductive lead having a proximal end electrically coupled to the electrical contact and having a distal end, the impedance adjusting circuit having an impedance that causes the impedance looking into said stimulator output point to be substantially matched to the characteristic impedance of said lead; and at least one distal therapy electrode proximate the distal end of said lead. - View Dependent Claims (21)
-
Specification