초록 ▼

An implantable medical device (IMD), such as a defibrillator, performs a capacitor reform or other temporary high current mode, such as to maintain efficacy of a battery or a high voltage defibrillation energy storage capacitor in spite of non-use. Before performing the capacitor reform or other hig

An implantable medical device (IMD), such as a defibrillator, performs a capacitor reform or other temporary high current mode, such as to maintain efficacy of a battery or a high voltage defibrillation energy storage capacitor in spite of non-use. Before performing the capacitor reform or other high current mode, a voltage delay test can be performed. A voltage delay can be declared when an initial battery voltage measurement is less than a later battery voltage measurement during a loaded condition such as the charging of the capacitor. If a voltage delay is present, the capacitor reform or other temporary high current mode is enabled, otherwise, the capacitor reform or other temporary high current mode is inhibited. This saves energy, increasing the life of the IMD before explant.

대표청구항 ▼

What is claimed is: 1. An implantable apparatus comprising:a battery;a high voltage storage capacitor for storing at least one of defibrillation energy and cardioversion energy;a high voltage storage capacitor charging circuit, coupled to the battery and the high voltage capacitor;a battery voltage

What is claimed is: 1. An implantable apparatus comprising:a battery;a high voltage storage capacitor for storing at least one of defibrillation energy and cardioversion energy;a high voltage storage capacitor charging circuit, coupled to the battery and the high voltage capacitor;a battery voltage measurement circuit, coupled to the battery; anda processor, coupled to battery voltage measurement circuit, configured to:recurrently test for a battery voltage delay via initiating a temporary high current mode that draws high current from the battery to determine the presence or absence of the battery voltage delay;continue the temporary high current mode when determining that the battery voltage delay is present; andsubstantially immediately discontinue the temporary high current mode when the battery voltage delay is absent.