Method and apparatus for guiding an external needle to an implantable device
First Claim
Patent Images
1. A system to generate a field relative to an implanted medical device, comprising:
- a coil array positioned in the implanted medical device includes a plurality of coils, each coil of the plurality of coils has a winding group formed on a flexible circuit and positioned with the implanted medical device relative to a port formed by the implanted medical device;
a single power source in the implanted medical device to power all components of the implanted medical device which includes energizing the coil array; and
a processor operable to control the energizing of the coil array from the single power source according to selected instructions to assist in providing at least one of a substantially constant amplitude alternating current or voltage to the coil array;
wherein each coil of the plurality of coils in the coil array is formed substantially thin in the flexible circuit to provide a substantially thin profile of the flexible circuit;
wherein each coil includes a first winding portion separated from a second winding portion by an isolation layer;
wherein the first winding portion and the second winding portion are operable as a single coil that has a selected total number of windings equal to the first winding portion and the second winding portion.
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Accused Products
Abstract
A system to generate a navigation field relative to an implanted device is disclosed. The system can include a small and/or thin localizer array positioned in the implanted device. A power management scheme and circuits can be provided to conserve and resource power in the implanted device.
123 Citations
47 Claims
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1. A system to generate a field relative to an implanted medical device, comprising:
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a coil array positioned in the implanted medical device includes a plurality of coils, each coil of the plurality of coils has a winding group formed on a flexible circuit and positioned with the implanted medical device relative to a port formed by the implanted medical device; a single power source in the implanted medical device to power all components of the implanted medical device which includes energizing the coil array; and a processor operable to control the energizing of the coil array from the single power source according to selected instructions to assist in providing at least one of a substantially constant amplitude alternating current or voltage to the coil array; wherein each coil of the plurality of coils in the coil array is formed substantially thin in the flexible circuit to provide a substantially thin profile of the flexible circuit; wherein each coil includes a first winding portion separated from a second winding portion by an isolation layer; wherein the first winding portion and the second winding portion are operable as a single coil that has a selected total number of windings equal to the first winding portion and the second winding portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of operating a localizer associated with an implanted medical device having a single power source to generate a navigation field and transmit telemetry from the implanted medical device, the method comprising:
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operating the implanted medical device to deliver a therapy to a patient including drawing a current from the single power source; sending a stop signal to a receiver in the implanted medical device to stop the operation of the implanted medical device from delivering the therapy; in response to the stop signal, stopping the operation of the implanted medical device from delivering the therapy; after stopping operation of the implanted medical device from delivering the therapy, starting a port finder routine having sub-routines including starting a port finder timer to time the operation of the port finder routine; powering a coil to emit a field; determining whether the port finder timer has expired; when it is determined that the port finder timer has expired, restarting the operation of the implanted medical device to deliver the therapy. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A system to provide at least one of a constant amplitude alternating current or voltage to a localizer in an implanted medical device that includes a pump, comprising:
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a single power source of the implanted medical device to power the pump and the localizer; an operational amplifier operable to receive an input voltage from the single power source and output a reference voltage to a precision resistor and a first PMOS current mirror cascode; a NMOS current mirror operable to receive an output voltage from the precision resistor; a second PMOS current mirror cascode operable to receive an output voltage from the NMOS current mirror and the first PMOS current mirror cascode to at least one of output a substantially constant amplitude alternating current or voltage based on the output reference voltage; a first coil configured to generate a field to determine at least one of an orientation or a position of the implanted medical device; a first capacitor in parallel with the first coil configured to tune an output frequency of the generated field; and a first switch to form a connection between the second PMOS current mirror cascode and the first coil and the first capacitor such that the first coil and first capacitor receive the at least one of the output substantially constant amplitude alternating current or voltage that is output from the first PMOS current mirror cascode. - View Dependent Claims (21, 22, 23, 24)
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25. A system to generate a field relative to an implanted medical device, comprising:
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a coil array positioned in the implanted medical device includes a plurality of coils wherein each coil has a winding group formed on a flexible circuit; a power source in the implanted medical device to power all components of the implanted medical device, wherein the power source is configured to energize the coil array and a second component; and a processor configured to control the energizing of the coil array according to selected instructions to assist in providing a current to the coil array according to a port finder routine that includes a port finder timer and a stop operation of the second component; wherein each of the plurality of coils in the coil array is formed substantially thin in the flexible circuit to provide a substantially thin profile of the flexible circuit. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A system to receive a field within an implanted medical device, comprising:
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a coil array positioned in the implanted medical device includes a plurality of coils wherein each coil has a winding group formed substantially flat on a circuit, wherein each winding group includes a first winding portion on a first layer and a second winding portion on a second layer, wherein both the first winding portion and the second winding portion are coiled around an axis substantially perpendicular to the first layer and the second layer; a power source in the implanted medical device to power all components of the implanted medical device; a processor configured to measure a signal received by the coil array from a field generated external from the implanted medical device and generate data regarding the signal that is measured; an external processor system configured to execute instructions regarding the generated data, wherein the external processor is external to the implanted medical device and a patient in which the implanted medical device is implanted; and a telemetry processing system configured to receive the generated data regarding the signal that is measured and transmit the generated data to the external processor system; wherein the external processor system is operable to determine a location of an emitting system that is generating the field generated external from the implanted medical device.
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38. A method of operating a localizer associated with an implanted medical device having a power source to generate a navigation field and transmit telemetry from the implanted medical device, the method comprising:
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operating the implanted medical device to deliver a therapy to a patient including drawing a current from the single power source; sending a stop signal to a receiver in the implanted medical device to stop the operation of the implanted medical device from delivering the therapy; in response to the stop signal, stopping the operation of the implanted medical device from delivering the therapy; after stopping operation of the implanted medical device from delivering the therapy, starting a port finder routine having sub-routines including starting a port finder timer to time the operation of the port finder routine; powering a coil to emit a field; determining whether the port finder timer has expired; when it is determined that the port finder timer has expired, restarting the operation of the implanted medical device to deliver the therapy. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification