Conductor
First Claim
1. A conductor for conducting a weak bio-electric signal from a first end of the conductor to a second end of the conductor, the weak bio-electric signal being obtained from a patient electrode connectable to said first end of the conductor, said conductor minimizing attenuation of the conducted, weak bio-electric signal while avoiding the inductive generation of currents in the conductor presenting a risk of injury to the patient when the conductor is used in an environment in which current-inducing electro-magnetic energy is present, said conductor comprising:
- an electrically conductive member (6) extending between said first and second ends of the conductor, said electrically conductive member being formed of a solid, non-metallic, conductive material and exhibiting an impedance between said first and second ends in a range of 5 to 300 kilo-ohms;
an insulating sheath member (7) surrounding the exterior of said electrically conductive member, said sheath member having insulating properties that are maintained when the sheath member is subjected to a voltage up to a predetermined magnitude; and
a support member (8) extending between said first and second ends of said conductor and comprising a longitudinally substantially inelastic, flexible material.
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Accused Products
Abstract
A conductor, especially a conductor for measuring bio-electric signals occurring in an MRI environment, which comprises an electrically conductive part made of a non-metal material and a sheath part arranged over it. To produce a light and flexible conductor, the impedance of the conductive part is in the range of 5 to 300 kilo-ohm. The sheath part is arranged to endure a required voltage and the conductor comprises a support part which is made of a substantially inelastic material.
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Citations
12 Claims
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1. A conductor for conducting a weak bio-electric signal from a first end of the conductor to a second end of the conductor, the weak bio-electric signal being obtained from a patient electrode connectable to said first end of the conductor, said conductor minimizing attenuation of the conducted, weak bio-electric signal while avoiding the inductive generation of currents in the conductor presenting a risk of injury to the patient when the conductor is used in an environment in which current-inducing electro-magnetic energy is present, said conductor comprising:
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an electrically conductive member (6) extending between said first and second ends of the conductor, said electrically conductive member being formed of a solid, non-metallic, conductive material and exhibiting an impedance between said first and second ends in a range of 5 to 300 kilo-ohms; an insulating sheath member (7) surrounding the exterior of said electrically conductive member, said sheath member having insulating properties that are maintained when the sheath member is subjected to a voltage up to a predetermined magnitude; and a support member (8) extending between said first and second ends of said conductor and comprising a longitudinally substantially inelastic, flexible material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A conductor device for conducting an EKG signal obtained from a patient electrode, said conductor device minimizing attenuation of the conducted, EKG signal while avoiding the inductive generation of currents in the conductor device presenting a risk of injury to the patient when used in an MRI environment, said conductor device comprising:
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an electrode connector (5) suitable for connection to the patient electrode, said electrode connector being formed, at least in part from a plastic material with carbon added to the plastic material; an electrically conductive member (6) having first and second ends, said electrode connector being connected to an end of said electrically conductive member, said electrically conductive member being formed of a silicone compound having carbon particles uniformly dispersed therein and exhibiting an impedance between said first and second ends in a range of 40 to 80 kilo-ohms; an insulating sheath member (7) surrounding the exterior of said electrically conductive member, said sheath member being formed of polyurethane having insulating properties that are maintained when said sheath member is subjected to a voltage up to at least 3 kV; and a support member (8) extending between said first and second ends of said electrically conductive member, said support member being positioned along a center axis of the conductor device and comprising Kevlar fibers.
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Specification