REDUCTION OF RF INDUCED TISSUE HEATING USING CONDUCTIVE SURFACE PATTERN
First Claim
Patent Images
1. A medical device, comprising:
- at least one conductive shaft, wherein one or more coaxial layers with one or multiple material deposition patterns cover at least a lengthwise portion of the at least one conductive shaft to suppress the propagation of alternating currents in the frequency range from approximately 10 MHz to 3 GHz.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides, among other things, means to suppress AC current propagation along elongated medical devices incorporating long conductive structures. AC currents in the frequency range from approximately 10 MHz to 3 GHz can be substantially suppressed without altering the low and DC frequency response of the medical device.
98 Citations
27 Claims
-
1. A medical device, comprising:
- at least one conductive shaft, wherein one or more coaxial layers with one or multiple material deposition patterns cover at least a lengthwise portion of the at least one conductive shaft to suppress the propagation of alternating currents in the frequency range from approximately 10 MHz to 3 GHz.
- View Dependent Claims (2)
-
3. The device of claim 3, further comprising a third, dielectric layer, the third layer (a) preventing direct contact of the second layer with an environment around the medical device, or (b) creating capacitive coupling of the one or multiple patterns of the second layer with the environment.
-
4. A medical device, comprising:
- at least one non-conductive shaft, wherein one or more coaxial layers with one or multiple material deposition patterns cover at least a lengthwise portion of the at least one non-conductive shaft to allow the propagation of DC and low frequency current therethrough while suppressing the propagation of alternating currents in the frequency range from approximately 10 MHz to 3 GHz.
- View Dependent Claims (5, 6, 7, 8)
-
9. A medical device, comprising:
- one or more cables comprising one or more strands of wire, wherein the one or more strands of wire incorporate a pattern of insulated and conductive sections to suppress the propagation of alternating currents in the frequency range from approximately 10 MHz to 3 GHz.
- View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
21. A medical device, comprising:
- one or more coils comprising one or more filars of continuous wire, wherein the one or more coils have one or more tightly wound sections to create at least one high impedance section, the at least one high impedance section having a length that is short compared to the wavelength at one or more frequencies or frequency bands of interest in the frequency range approximately 10 MHz to 3 GHz.
- View Dependent Claims (22, 23, 24, 25, 26, 27)
Specification