Surgery – Truss – Pad
Patent
1990-07-09
1991-12-24
Jaworski, Francis
Surgery
Truss
Pad
A61N 100
Patent
active
050743023
ABSTRACT:
A self-adjusting rate-responsive pacemaker includes a conventional programmable pulse generator, a physiological sensor, and a processor, all packaged within an implantable case. The pulse generator generates heart stimulation pulses on demand, or as otherwise programmed, as controlled by a sensor-indicated rate signal. The sensor-indicated rate signal is derived from a raw signal obtained from the physiological sensor, and provides some indication of whether the heart rate should increase or decrease. The processor converts the raw signal to the sensor-indicated rate signal in accordance with a desired relationship (FIGS. 2, 3, 7A, 8). A minimum sensor signal value sets the minimum rate at which the pacemaker generates stimulation pulses, and a maximum sensor signal value sets the maximum rate at which the pacemaker generates stimulation pulses. Both the minimum and maximum sensor signal values may be programmed to automatically be adjusted based on the sensor signals occurring during a prior prescribed time period. In one embodiment, the sensor signals occurring during the prescribed time period are classified into three categories: low, high, and intermediate. The minimum sensor signal value is then computed as the average of the low sensor signals, while the maximum sensor signal is computed as the average of the high sensor signals.
REFERENCES:
patent: 4899752 (1990-02-01), Cohen
patent: 4940052 (1990-07-01), Mann et al.
patent: 4940053 (1990-07-01), Mann et al.
patent: 4972834 (1990-11-01), Begemann et al.
Mann Brian M.
Poore John W.
Gold Bryant R.
Jaworski Francis
Manuel George
Romano Malcolm J.
Siemens-Pacesetter, Inc.
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