Devices for detecting the presence of cardiac activity following administration of defibrillation therapy
First Claim
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1. A device for detecting the presence of cardiac activity in a patient, comprising:
- a detector circuit that is configured to detect the influence of a first defibrillation shock on the patient immediately subsequent to termination of a first defibrillation shock;
an isolation circuit configured to electrically isolate the detector circuit from the first defibrillation shock, wherein the detected cardiac activity comprises fibrillation and wherein the detector circuit is further configured to detect if the fibrillation ceases immediately after termination of the first defibrillation shock and reinitiates within a predetermined time period after the first defibrillation shock; and
a controller circuit wherein the controller circuit is configured to administer a second defibrillation shock having a second shock value that is at least one of substantially equivalent to the first shock value and less than the first shock value immediately if it is determined that the fibrillation has ceased immediately after termination of the first defibrillation shock and reinitiated within the predetermined time period.
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Abstract
The present invention provides systems, methods and computer program products for detecting the presence of cardiac activity in a patient. The present invention includes a detector circuit that is configured to detect the influence of a first defibrillation shock on the patient immediately subsequent to termination of a first defibrillation shock.
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Citations
113 Claims
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1. A device for detecting the presence of cardiac activity in a patient, comprising:
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a detector circuit that is configured to detect the influence of a first defibrillation shock on the patient immediately subsequent to termination of a first defibrillation shock; an isolation circuit configured to electrically isolate the detector circuit from the first defibrillation shock, wherein the detected cardiac activity comprises fibrillation and wherein the detector circuit is further configured to detect if the fibrillation ceases immediately after termination of the first defibrillation shock and reinitiates within a predetermined time period after the first defibrillation shock; and a controller circuit wherein the controller circuit is configured to administer a second defibrillation shock having a second shock value that is at least one of substantially equivalent to the first shock value and less than the first shock value immediately if it is determined that the fibrillation has ceased immediately after termination of the first defibrillation shock and reinitiated within the predetermined time period. - 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, 49, 50)
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51. A system for detecting the presence of cardiac activity in a patient, comprising:
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a first set of electrodes for applying a first defibrillation shock to a heart of the patient; means for detecting the influence of the first defibrillation shock on the patient immediately subsequent to termination of a first defibrillation shock; means for electrically isolating the means for detecting from the means for administering, wherein the detected cardiac activity comprises fibrillation and wherein the means for detecting comprises means for detecting if the fibrillation ceases immediately after termination of the first defibrillation shock and reinitiates within a predetermined time period after the first defibrillation shock; and means for administering a second defibrillation shock having a second shock value that is at least one of substantially equivalent to the first shock value and less than the first shock value immediately if it is determined that the fibrillation has ceased after termination of the first defibrillation shock and reinitiated within the predetermined time period. - View Dependent Claims (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)
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82. A system for detecting the presence of cardiac activity in a patient, comprising:
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a defibrillator circuit configured to administer the first defibrillation shock to the patient; a detector circuit configured to detect the influence of the first defibrillation shock on the patient subsequent to termination of a first defibrillation shock; and an isolation circuit configured to electrically isolate the detector circuit from the defibrillator circuit, wherein the detected cardiac activity comprises fibrillation and wherein the detector circuit is further configured to detect if the fibrillation ceases immediately after termination of the first defibrillation shock and reinitiates within a predetermined time period after the first defibrillation shock and wherein the defibrillator circuit is further configured to administer a second defibrillation shock having a second shock value that is at least one of substantially equivalent to the first shock value and less than the first shock value immediately if it is determined that the fibrillation has ceased after termination of the first defibrillation shock and reinitiated within the predetermined time period.
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83. A computer program product for detecting the presence of cardiac activity in a patient, comprising:
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computer readable medium having computer readable program code embodied therein, the computer readable program code comprising; computer readable program code for detecting the influence of the first defibrillation shock on the patient immediately subsequent to termination of a first defibrillation shock; and
computer readable program code for electrically isolating the means for detecting from the means for administering, wherein the detected cardiac activity comprises fibrillation and wherein the computer readable program code for detecting comprises computer readable program code for detecting if the fibrillation ceases immediately after termination of the first defibrillation shock and reinitiates within a predetermined time period after the first defibrillation shock; andcomputer readable program code for administering a second defibrillation shock having a second shock value that is at least one of substantially equivalent to the first shock value and less than the first shock value immediately if it is determined that the fibrillation has ceased after termination of the first defibrillation shock and reinitiated within the predetermined time period. - View Dependent Claims (84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112)
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113. A method for detecting the presence of cardiac activity in a patient, comprising:
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applying a first defibrillation shock to a heart of the patient; and detecting the influence of the first defibrillation shock on the patient immediately subsequent to termination of a first defibrillation shock; and electrically isolating the detector circuit from the first defibrillation shock, wherein the detected cardiac activity comprises fibrillation and wherein the detector circuit is further configured to detect if the fibrillation ceases immediately after termination of the first defibrillation shock and reinitiates within a predetermined time period after the first defibrillation shock; and applying a second defibrillation shock to the heart of the patient having a second shock value that is at least one of substantially equivalent to the first shock value and less than the first shock value immediately if it is determined that the fibrillation has ceased immediately after termination of the first defibrillation shock and reinitiated within the predetermined time period.
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Specification