Automatic shock lead gain adjuster
AssigneeCardiac Pacemakers, Inc.
InventorsJason W. Eberle, LeAnne Marie Mackey
Life of this patent
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Abstract
A system and method for automatically adjusting the gain for a shock lead system in an implantable medical device is provided. The system and method operate when, after a pre-selected period of time, the gain has not been programmed. The system and method then automatically produce and set the gain for the shock lead system. The system and method poll and determine a maximum value for the output of the shock lead system amplifier and produce a new gain value to scale the output to facilitate providing useful data that is large enough to separate signal from noise but small enough to avoid clipping.
Claims14
An implantable medical device comprising:
- a shock lead system including at least one shock lead;
- an automatic gain adjusting system coupled to the shock lead system;
- and
- wherein the automatic gain adjusting system includes a detector which detects that a gain value for the shock lead system was not set on exiting storage mode and a gain determining module which produces and stores the gain value:
A method of automatic gain adjusting for an implantable medical device comprising:
- determining if a shock lead system has been programmed within a first period of time;
- enabling an amplifier for the shock lead system;
- setting a first gain for the amplifier to a predetermined value;
- waiting for a second period of time for the amplifier to stabilize;
- clearing a data storage of all old values;
- collecting output data from the amplifier in the data storage for a third period of time;
- determining a peak value for the data collected in the data storage;
- producing a second gain based on the peak value;
- and
- setting the first gain to the value of the second gain.
An implantable medical device comprising:
- a shock lead system including at least one shock lead;
- gain adjuster means for automatically adjusting a gain value for the shock lead system comprising:
- a sensing means for sensing cardiovascular activity;
- an amplifying means for amplifying the output of the sensing means;
- a data storage means for storing data output from the amplifying means;
- and
- a threshold determining means for producing a gain based on the data stored in the data storage means;
- and
- wherein a gain for the shock lead system is automatically adjusted by the gain adjuster means if the gain has not been set within a first period of time.
Dependencies are inferred from the claim text.