IMPLANTABLE MEDICAL SYSTEM FOR DETECTING INCIPIENT EDEMA
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Abstract
An implantable medical system for detecting incipient edema has an implantable medical lead including an optical sensor having a light source and a light detector. The medical system further has an edema detection circuit that activates the light source to emit light, the light being directed into lung tissue of a patient and that obtains a light intensity value corresponding to an intensity of light received by the light detector, and that evaluates the light intensity value to detect a consistency with incipient edema.
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Citations
114 Claims
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1-59. -59. (canceled)
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60. A medical system comprising:
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an implantable medical lead adapted for implantation in a patient, said implantable medical lead carrying at least one optical sensor comprising a light source that emits light in vivo at a predetermined wavelength and at a predetermined intensity, and a light detector, said implantable medical lead being configured to direct the light emitted by said light source into lung tissue of the patient; and an edema detection circuit connected to said implantable medical lead, said edema detection circuit being configured to activate said light source to emit light during at least one measurement session at said predetermined wavelength and said predetermined intensity and, with said light detector, to detect said light after said light interacts with said lung tissue, the light detected by the light detector having a detected light intensity value, and to evaluate said detected light intensity value by comparing said detected light intensity value with a reference intensity value to obtain a comparison result, and to emit an edema detection circuit output indicating incipient edema when said comparison result is consistent with incipient edema. - View Dependent Claims (61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78)
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79. An implantable medical lead comprising:
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an implantable lead body adapted for implantation in a patient, said implantable lead body carrying at least one optical sensor comprising a light source that emits light in vivo at a predetermined wavelength and at a predetermined intensity, and a light detector, said implantable lead body being configured to direct the light emitted by said light source into lung tissue of the patient; and an edema detection circuit carried by said implantable lead body, said edema detection circuit being configured to activate said light source to emit light during at least one measurement session at said predetermined wavelength and said predetermined intensity and, with said light detector, to detect said light after said light interacts with said lung tissue, the light detected by the light detector having a detected light intensity value, and to evaluate said detected light intensity value by comparing said detected light intensity value with a reference intensity value to obtain a comparison result, and to emit an edema detection circuit output indicating incipient edema when said comparison result is consistent with incipient edema. - View Dependent Claims (80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96)
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97. A method for detecting incipient edema comprising the steps of:
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Implanting a medical lead in a patient, and with said implantable medical lead, carrying at least one optical sensor comprising a light source that emits light in vivo at a predetermined wavelength and at a predetermined intensity, and a light detector, said medical lead, when implanted, causing the light emitted by said light source to be directed into lung tissue of the patient; and with an edema detection circuit connected to said implantable medical lead, activating said light source to emit light during at least one measurement session at said predetermined wavelength and said predetermined intensity and, with said light detector, detecting said light after said light interacts with said lung tissue, the light detected by the light detector having a detected light intensity value, and automatically evaluating said detected light intensity value by comparing said detected light intensity value with a reference intensity value to obtain a comparison result, and emitting an edema detection circuit output indicating incipient edema when said comparison result is consistent with incipient edema. - View Dependent Claims (98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114)
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Specification