Abstract: Battery powered systems with long standby times, such as automatic external defibrillators, may be required to indicate their operational status to a user by blinking lights or sounding speakers or buzzers. These active status indication activities consume power thereby reducing the battery life of the system. Automatically adjusting the level and frequency of these indication activities to match the ambient environment can reduce power consumption of the battery operated system. For example, in a dimly lit room, an indicator light may be visible even though it might be too dim to be seen in a bright room. Thus, if the room is dim, indicator lights can be dimmed to conserve power. These automatic adjustments made in response to the environment may help conserve power and extend battery life.

Abstract: A battery system for a medical device includes a first power supply and a second power supply. The first power supply is capable of being connected to the medical device to supply power to the medical device during a first operating mode of the medical device. The second power supply supplies power to at least one of a portion of the medical device and the battery system during an alternate mode, exclusive of a state the first power supply.

Abstract: Battery powered systems with long standby times, such as automatic external defibrillators (AEDs), may be required to indicate their operational status to a user by blinking lights or sounding speakers or buzzers. These active status indication activities consume power thereby reducing the battery life of the system. To conserve power and to be more effective in seeking attention from a human operator, the status alerts for the AED produced by an active status indicator (ASI) system can be more meaningful to humans or more unique relative to status alerts provided by conventional devices. Additionally, the ASI system may automatically adjust power consumed by the indicators in response to sensing environmental conditions of the AED.

Abstract: A system and method provides a status indicator to a battery pack of a medical device. The battery pack includes a power supply capable of being connected to the medical device. The battery pack also includes an indicator to automatically indicate a status of at least a portion of at least one of the battery pack and the medical device. For example, the indicator can indicate a status of the power supply.

Abstract: An AED includes defibrillation circuitry housed within an enclosure, a first processor programmed to periodically test the operability of the defibrillation circuitry and a second processor in communication with the first processor. The AED further includes a visual indicator, such as a red/green LED, positioned at the exterior of the enclosure that is operatively connected to the second processor. The second processor is programmed to control the visual indicator in response to the periodic test results provided to it by the first processor.

Abstract: A battery system for a medical device includes a first power supply and a second power supply. The first power supply is capable of being connected to the medical device to supply power to the medical device during a first operating mode of the medical device. The second power supply supplies power to at least one of a portion of the medical device and the battery system during an alternate mode, exclusive of a state the first power supply.

Abstract: A battery system for a medical device includes a first power supply and a second power supply. The first power supply is capable of being connected to the medical device to supply power to the medical device during a first operating mode of the medical device. The second power supply supplies power to at least one of a portion of the medical device and the battery system during an alternate mode, exclusive of a state the first power supply.

Abstract: An implantable heart valve having an oscillator for resonating the valve to prevent clotting.

Abstract: A cardiovascular catheter for use particularly in situations requiring varying forms of cardiopulmonary bypass. The catheter which can be introduced percutaneously has an expandable section in proximity to drainage inlets. In one form of the invention the catheter is introduced percutaneously with the expansion means collapsed after the cannula has been introduced percutaneously through the vein into the right atrium the expansion means is employed to prevent the atrium from collapsing around and possibly impeding flow through the cannula, for instance during percutaneous initiation of cardiopulmonary bypass or other venous drainage application.