Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1992-05-01
1994-07-19
Cohen, Lee S.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 17, A61N 500
Patent
active
053305132
ABSTRACT:
An implantable physiologic device, e.g., a multi-programmable, microprocessor based cardiac pacemaker, is provided with data storage and transmission capabilities for transmitting out certain current operating parameters and sensed events and for storing counted events for transmission of counts, histograms and real-time clock data out on command. The device preferably comprises a rate responsive cardiac pacemaker for providing an optimized pacing rate of stimulation pulses as a function of at least one selected rate control parameter. Each rate control parameter has a value which varies as a function of changes in a patient's physiologic demand and includes a sensor system for sensing the rate control parameter value and for providing a sensor output representative thereof. The cardiac pacemaker also includes control circuitry which includes a rate response defining means for deriving desired pacing rates as a function of the sensor output signal(s) modified by sensor gain and selective weighting coefficient values. An achievement monitoring means that has a predetermined achievement criterion monitors the relationship between the derived pacing rates and the achievement criterion over an optimization period. Output circuitry providing optimized pacing rates as a function of optimization is accomplished by adjusting the rate response gain for each sensor as a function of the monitored achievement relationship. Another optimization function is provided by adjusting a sensor weighting coefficient value which weights or regulates the relative contribution each sensor's derived desired pacing rates will contribute toward the pacemaker-derived optimized pacing rate.
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Bennett Tom D.
Nichols Lucy M.
Roline Glenn M.
Thompson David L.
Cohen Lee S.
Gadson Gregory P.
Medtronic Inc.
Parker Marianne
Patton Harold R.
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