Battery condition warning system for medical implant
First Claim
1. A battery condition warning system in combination with a battery powered medical implant, including a treating circuit activated by an event signal generated in response to the onset of a medical condition or a self-test signal for respectively performing a treating function to a patient or to an internal test load, said system comprising:
- resettable timer means for generating said self-test signal after a predetermined time period, said timer means being reset upon each assertion of said event signal;
control means responsive to said self-test signal to cause said treating circuit to perform said treating function to said internal test load;
monitoring means for monitoring the voltage potential of said battery during activation of said treating circuit and for producing an alarm signal when said voltage potential falls below a predetermined level; and
alarm means responsive to said alarm signal for producing an alarm.
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Accused Products
Abstract
A battery condition warning system for use in a battery powered medical implant device which generates an audible alarm to warn the patient of an impending battery failure. The warning system monitors the voltage potential of the battery during operation of the defibrillator, and when the voltage potential falls below a predetermined level, it activates an audible alarm which is heard by the patient. The system further includes a control circuit adaptable to deactivate the audible alarm in response to a first external magnetic condition, to deactivate the timer in response to a second external magnetic condition, or to conduct an internal test in response to a third external magnetic condition.
81 Citations
6 Claims
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1. A battery condition warning system in combination with a battery powered medical implant, including a treating circuit activated by an event signal generated in response to the onset of a medical condition or a self-test signal for respectively performing a treating function to a patient or to an internal test load, said system comprising:
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resettable timer means for generating said self-test signal after a predetermined time period, said timer means being reset upon each assertion of said event signal; control means responsive to said self-test signal to cause said treating circuit to perform said treating function to said internal test load; monitoring means for monitoring the voltage potential of said battery during activation of said treating circuit and for producing an alarm signal when said voltage potential falls below a predetermined level; and alarm means responsive to said alarm signal for producing an alarm. - View Dependent Claims (2, 3, 4)
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5. A battery condition warning system in combination with a battery powered medical implant including an automatic standby defibrillator activated by an event signal generated in response to the detection of fibrillation or a self-test signal thereby to issue a high-energy defibrillating pulse respectively to the heart of a patient or to an internal load resistance, said system comprising:
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resettable timer means for generating said self-test signal after a predetermined time period, said timer means being reset upon each assertion of said event signal; control means responsive to said self-test signal to effect delivery of said high energy defibrillating pulses to said internal load resistance; monitoring means for monitoring the voltage level of said battery during activation of said defibrillator and for producing an alarm signal when the voltage potential falls below a predetermined level; and alarm means responsive to said alarm signal for generating an audible alarm which warns the patient of an impending battery failure. - View Dependent Claims (6)
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Specification