Medtronic, Inc.

Cardiac Pacemakers, Inc.

Donald L Villalta

Irfan Z Ali

Earle Timothy Roberts

Nathan Andrew Torgerson

Garrett R Sipple

David S Slack

Sudheendhar Raghavendran

Veerichetty A Kadhiresan

Scott A Sarkinen

Arthur L Olive

Brian D Pederson

A total dose of a therapeutic agent to be delivered to a patient by an infusion device over a total period of time is automatically divided into a plurality of unit doses to be delivered to the patient over a plurality of unit periods of time. The infusion device is automatically programmed to deliver one of the unit doses of the therapeutic agent to the patient over its respective unit period of time, after which the one unit dose is delivered, and a determination is made of whether an error occurred in delivering the one unit dose to the patient. Delivery of the total dose of the therapeutic agent to the patient may include iteratively automatically programming the infusion device to deliver successive unit doses upon determining that no error occurred in delivering a previous unit dose to the patient. Accordingly, the risk of improperly dosing the patient with the therapeutic agent in an event of a software or hardware anomaly within the infusion device is prevented or reduced.

Detecting and responding to software and hardware anomalies in a fluid delivery system

Devices and systems provide for proximity based selection of an implantable medical device for far field communication with an external device. By using a proximity communication that is limited to the IMD of interest during the selection process, the external device can eliminate those IMDs that are in range of far field communications but are able to receive the proximity communication. Thus, information may be shared via a proximity communication that is validated via a far field communication, or shared via a far field communication as a challenge and then validated via a proximity communication. The proximity communication may be used to initially limit the number of devices that respond to a discovery request and then subsequently used to select the intended implantable medical device as well as automatically select the appropriate therapy application corresponding to the selected IMD.

Proximity based selection of an implantable medical device for far field communication

Methods, devices and systems are disclosed that provide for dynamically adjusting the valid lifespan of a session key for wireless communication sessions established between at least two medical devices. Adjusting the session key lifetime balances protecting the communications link so that it is not unnecessarily susceptible to eavesdropping by third parties or other interference while obviating the need for a user to repeatedly perform access control steps.

Adaptively configuring the validation timeout of a session key used for securing communication with an implantable medical device

A cardiac pacing and sensing system includes a body implantable unit for generating tissue stimulation pulses and manipulating information based on sensed signals, and a catheter for transmitting pulses from the unit to a pacing electrode adjacent myocardial tissue. The unit incorporates circuitry for generating response values, one associated with each stimulation pulse, based on a predetermined characteristic or parameter of the signals evoked by the pulses. To evaluate the efficacy of the parameter in distinguishing capture versus non-capture, the stimulation pulses are generated according to a protocol of high energy pulses guaranteed to effect capture interspersed with low energy pulses guaranteed not to effect capture. Data, accumulated and sorted into separate 'capture' and 'non-capture' sets, provides respective capture and non-capture composite values. The ratio of the composite values is compared to a predetermined threshold, to generate an indication either accepting or rejecting the chosen parameter. A parameter, once accepted, can be employed in a self-test that either increments or decrements stimulation of signals to evaluate the capture threshold. Optionally, two or more designated parameters can be screened simultaneously and compared, with the most favorable ratio then being compared to the threshold.

Self-calibration system for capture verification in pacing devices

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Minneapolis, MN, United States of America

Donald L Villalta