Electromagnetic interference immune tissue invasive system
First Claim
Patent Images
1. A cardiac assist device, comprising:
- a primary device housing;
said primary device housing having a control circuit therein;
a shielding formed around said primary device housing to shield said primary device housing and any circuits therein from electromagnetic interference;
a lead system to transmit and receive signals between a selected cardiac tissue region and said primary device housing;
a switch to place the control circuitry into a fixed-rate mode of operation;
an acoustic sensor to sense a predetermined acoustic signal;
said switch placing the control circuitry into a fixed-rate mode of operation when said acoustic sensor senses the predetermined acoustic signal;
said lead system being a photonic lead system to transmit between said primary device housing and the selected cardiac tissue region, both power and control signals in the form of light;
a photoresponsive device to convert the light transmitted by said photonic lead system into electrical energy and to sense variations in the light energy to produce control signals;
a charge accumulating device to receive and store the electrical energy produced by said photoresponsive device; and
a discharge control device, responsive to the control signals, to direct the stored electrical energy from said charge accumulating device to the selected cardiac tissue region.
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Accused Products
Abstract
An electromagnetic immune tissue invasive system includes a primary device housing. The primary device housing having a control circuit therein. A shielding is formed around the primary device housing to shield the primary device housing and any circuits therein from electromagnetic interference. A lead system transmits and receives signals between the primary device housing. The lead system is either a fiber optic system or an electrically shielded electrical lead system.
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Citations
99 Claims
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1. A cardiac assist device, comprising:
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a primary device housing;
said primary device housing having a control circuit therein;
a shielding formed around said primary device housing to shield said primary device housing and any circuits therein from electromagnetic interference;
a lead system to transmit and receive signals between a selected cardiac tissue region and said primary device housing;
a switch to place the control circuitry into a fixed-rate mode of operation;
an acoustic sensor to sense a predetermined acoustic signal;
said switch placing the control circuitry into a fixed-rate mode of operation when said acoustic sensor senses the predetermined acoustic signal;
said lead system being a photonic lead system to transmit between said primary device housing and the selected cardiac tissue region, both power and control signals in the form of light;
a photoresponsive device to convert the light transmitted by said photonic lead system into electrical energy and to sense variations in the light energy to produce control signals;
a charge accumulating device to receive and store the electrical energy produced by said photoresponsive device; and
a discharge control device, responsive to the control signals, to direct the stored electrical energy from said charge accumulating device to the selected cardiac tissue region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
said microprocessor integrated circuit automatically adjusting a value for determining an elective replacement indication condition of a battery power source such that the value is automatically adjusted by said microprocessor integrated circuit in response to a measured level of a state of said battery power source, the measured level generated by said battery power source measuring circuit connected to said battery power source.
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21. The cardiac assist device as claimed in claim 19, wherein said microprocessor integrated circuit isolates physiological signals using a noise filtering circuit.
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22. The cardiac assist device as claimed in claim 19, wherein said microprocessor integrated circuit isolates physiological signals using digital noise filtering.
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23. The cardiac assist device as claimed in claim 19, wherein said microprocessor integrated circuit is programmable from a source external of the cardiac assist device.
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24. The cardiac assist device as claimed in claim 19, wherein said microprocessor integrated circuit provides physiological diagnostics to a source external of the cardiac assist device.
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25. The cardiac assist device as claimed in claim 19, wherein said microprocessor integrated circuit provides circuit diagnostics to a source external of the cardiac assist device.
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26. The cardiac assist device as claimed in claim 19, wherein said microprocessor integrated circuit is programmable from a source external of the cardiac assist device and provides circuit diagnostics to a source external of the cardiac assist device.
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27. The cardiac assist device as claimed in claim 1, wherein said leads system is a combination of a fiber optic based communication system and electrical leads.
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28. The cardiac assist device as claimed in claim 27, wherein said fiber optic communication system contains at least one channel within a multi-fiber optic bundle.
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29. The cardiac assist device as claimed in claim 1, wherein said lead system includes a sensing and stimulation system at an interface with the selected cardiac tissue region.
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30. The cardiac assist device as claimed in claim 29, wherein said sensing and stimulation system includes optical sensing components to detect physiological signals from the selected cardiac tissue region.
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31. The cardiac assist device as claimed in claim 30, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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32. The cardiac assist device as claimed in claim 30, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region and electrical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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33. The cardiac assist device as claimed in claim 29, wherein said sensing and stimulation system includes optical sensing components to detect physiological signals from the desired anatomical cardiac tissue region and electrical sensing components to detect physiological signals from the selected cardiac tissue region.
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34. The cardiac assist device as claimed in claim 29, wherein said sensing and stimulation system includes electrical sensing components to detect physiological signals from the selected cardiac tissue region.
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35. The cardiac assist device as claimed in claim 29, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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36. The cardiac assist device as claimed in claim 29, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region and electrical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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37. The cardiac assist system as claimed in claim 1, wherein said photoresponsive device is a small surface area photodiode and a large surface area photodiode, said small surface area photodiode sensing variations in the light energy to produce control signals, said large surface area photodiode converting the light transmitted by said photonic lead system into electrical energy.
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38. The cardiac assist system as claimed in claim 1, wherein said photoresponsive device is an array of photodiodes having a first section of photodiodes and a second section of photodiodes, said first section of photodiodes sensing variations in the light energy to produce control signals, said second section of photodiodes converting the light transmitted by said photonic lead system into electrical energy.
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39. The cardiac assist system as claimed in claim 1, wherein said photoresponsive device includes a charge transfer control circuit and a photodiode, said charge transfer control circuit controlling a discharging of a photodiode capacitance in two separate discharge periods during an integration period of the photodiode such that a first discharge period of the photodiode capacitance provides the sensing of variations in the light energy to produce control signals and a second discharge period of the photodiode capacitance provides the converting the light transmitted by said photonic lead system into electrical energy.
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40. The cardiac assist system as claimed in claim 39, wherein the first discharge period is completed before the second discharge period.
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41. The cardiac assist system as claimed in claim 39, wherein the first discharge period is a shorter time duration that the time duration of the second discharge period.
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42. The cardiac assist system as claimed in claim 39, wherein the integration period corresponds to the sampling period of the light to derive control data.
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43. The cardiac assist system as claimed in claim 39, wherein during the first discharge period, a control signal sensing circuit is connected to said photodiode, and during the second discharge period, said charge accumulating device is connected to said photodiode.
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44. The cardiac assist system as claimed in claim 1, wherein said charge accumulating device is a capacitor.
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45. The cardiac assist system as claimed in claim 1, wherein said charge accumulating device is a rechargeable battery.
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46. The cardiac assist system as claimed in claim 1, wherein said discharge control device is a controllable switch.
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47. The cardiac assist system as claimed in claim 1, wherein said switch is a reed switch.
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48. The cardiac assist system as claimed in claim 1, wherein said switch is a solid-state switch.
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49. A cardiac assist device, comprising:
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a primary device housing;
said primary device housing having a control circuit therein;
a shielding formed around said primary device housing to shield said primary device housing and any circuits therein from electromagnetic interference;
a lead system to transmit and receive signals between a selected cardiac tissue region and said primary device housing;
a switch to place the control circuitry into a fixed-rate mode of operation;
an acoustic sensor to sense a predetermined acoustic signal;
said switch placing the control circuitry into a fixed-rate mode of operation when said acoustic sensor senses the predetermined acoustic signal;
a detection circuit to detect a phase timing of an external electromagnetic field; and
said control circuit altering its operations to avoid interfering with the detected external electromagnetic field.
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50. A cardiac assist system, comprising:
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a primary device housing;
said primary device housing having a control circuit therein;
a shielding formed around said primary device housing to shield said primary device housing and any circuits therein from electromagnetic interference;
a lead system to transmit and receive signals between a selected cardiac tissue region and said primary device housing;
a switch to place the control circuitry into a fixed-rate mode of operation;
a near infrared sensor to sense a predetermined near infrared signal;
said switch placing the control circuitry into a fixed-rate mode of operation when said near infrared sensor senses the predetermined near infrared signal. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99)
said microprocessor integrated circuit automatically adjusting a value for determining an elective replacement indication condition of a battery power source such that the value is automatically adjusted by said microprocessor integrated circuit in response to a measured level of a state of said battery power source, the measured level generated by said battery power source measuring circuit connected to said battery power source.
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70. The cardiac assist device as claimed in claim 68, wherein said microprocessor integrated circuit isolates physiological signals using a noise filtering circuit.
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71. The cardiac assist device as claimed in claim 68, wherein said microprocessor integrated circuit isolates physiological signals using digital noise filtering.
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72. The cardiac assist device as claimed in claim 68, wherein said microprocessor integrated circuit is programmable from a source external of the cardiac assist device.
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73. The cardiac assist device as claimed in claim 68, wherein said microprocessor integrated circuit provides physiological diagnostics to a source external of the cardiac assist device.
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74. The cardiac assist device as claimed in claim 68, wherein said microprocessor integrated circuit provides circuit diagnostics to a source external of the cardiac assist device.
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75. The cardiac assist device as claimed in claim 68, wherein said microprocessor integrated circuit is programmable from a source external of the cardiac assist device and provides circuit diagnostics to a source external of the cardiac assist device.
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76. The cardiac assist device as claimed in claim 50, wherein said leads system is a combination of a fiber optic based communication system and electrical leads.
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77. The cardiac assist device as claimed in claim 76, wherein said fiber optic communication system contains at least one channel within a multi-fiber optic bundle.
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78. The cardiac assist device as claimed in claim 76, wherein said sensing and stimulation system includes optical sensing components to detect physiological signals from the selected cardiac tissue region.
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79. The cardiac assist device as claimed in claim 78, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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80. The cardiac assist device as claimed in claim 78, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region and electrical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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81. The cardiac assist device as claimed in claim 50, wherein said lead system includes a sensing and stimulation system at an epicardial-lead interface with the selected cardiac tissue region.
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82. The cardiac assist device as claimed in claim 77, wherein said sensing and stimulation system includes optical sensing components to detect physiological signals from the desired anatomical cardiac tissue region and electrical sensing components to detect physiological signals from the selected cardiac tissue region.
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83. The cardiac assist device as claimed in claim 81, wherein said sensing and stimulation system includes electrical sensing components to detect physiological signals from the selected cardiac tissue region.
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84. The cardiac assist device as claimed in claim 81, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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85. The cardiac assist device as claimed in claim 81, wherein said sensing and stimulation system includes optical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region and electrical pulsing components to deliver a stimulus of a predetermined duration and power to the selected cardiac tissue region.
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86. The cardiac assist device as claimed in claim 50, wherein said lead system is a photonic lead system to transmit between said primary device housing and the selected cardiac tissue region, both power and control signals in the form of light, and further comprising:
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a photoresponsive device to convert the light transmitted by said photonic lead system into electrical energy and to sense variations in the light energy to produce control signals;
a charge accumulating device to receive and store the electrical energy produced by said photoresponsive device; and
a discharge control device, responsive to the control signals, to direct the stored electrical energy from said charge accumulating device to the selected cardiac tissue region.
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87. The cardiac assist system as claimed in claim 86, wherein said photoresponsive device is a small surface area photodiode and a large surface area photodiode, said small surface area photodiode sensing variations in the light energy to produce control signals, said large surface area photodiode converting the light transmitted by said photonic lead system into electrical energy.
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88. The cardiac assist system as claimed in claim 86, wherein said photoresponsive device is an array of photodiodes having a first section of photodiodes and a second section of photodiodes, said first section of photodiodes sensing variations in the light energy to produce control signals, said second section of photodiodes converting the light transmitted by said photonic lead system into electrical energy.
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89. The cardiac assist system as claimed in claim 86, wherein said photoresponsive device includes a charge transfer control circuit and a photodiode, said charge transfer control circuit controlling a discharging of a photodiode capacitance in two separate discharge periods during an integration period of the photodiode such that a first discharge period of the photodiode capacitance provides the sensing of variations in the light energy to produce control signals and a second discharge period of the photodiode capacitance provides the converting the light transmitted by said photonic lead system into electrical energy.
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90. The cardiac assist system as claimed in claim 89, wherein the first discharge period is completed before the second discharge period.
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91. The cardiac assist system as claimed in claim 89, wherein the first discharge period is a shorter time duration that the time duration of the second discharge period.
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92. The cardiac assist system as claimed in claim 89, wherein the integration period corresponds to the sampling period of the light to derive control data.
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93. The cardiac assist system as claimed in claim 89, wherein during the first discharge period, a control signal sensing circuit is connected to said photodiode, and during the second discharge period, said charge accumulating device is connected to said photodiode.
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94. The cardiac assist system as claimed in claim 86, wherein said charge accumulating device is a capacitor.
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95. The cardiac assist system as claimed in claim 86, wherein said charge accumulating device is a rechargeable battery.
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96. The cardiac assist system as claimed in claim 86, wherein said discharge control device is a controllable switch.
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97. The cardiac assist system as claimed in claim 50, further comprising:
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a detection circuit to detect a phase timing of an external electromagnetic field;
said control circuit altering its operations to avoid interfering with the detected external electromagnetic field.
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98. The cardiac assist system as claimed in claim 50, wherein said switch is a reed switch.
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99. The cardiac assist system as claimed in claim 50, wherein said switch is a solid-state switch.
Specification