Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1995-01-18
1996-10-08
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 60, 128903, A61N 137
Patent
active
055627137
ABSTRACT:
An improved telemetry system for telemetering data from an implantable device such as a heart pacemaker to an external device with minimum energy consumption. The external device first sweeps its receiver across a predetermined frequency band, e.g., the fm broadcast band of 88 MHz to 108 MHz, to determine the particular frequency having the lowest ambient electromagnetic noise level, which it deems the optimum frequency for the telemetry to occur. The external device's transmitter then commands the pacemaker to telemeter a predetermined start signal at a succession of frequencies that sweep across that same frequency band, while the external device's receiver remains tuned to the optimum frequency. Eventually, the external devices receiver will receive the start signal and the external device thereupon will command the pacemaker to thereafter remain at its current frequency for the subsequent telemetry of data. Thus, the pacemaker is effectively tuned to the optimum frequency without the need for the pacemaker to incorporate an elaborate frequency synthesizer and without the need to draw excessive energy from the limited supply available so as to overcome interference at the operating frequency.
REFERENCES:
patent: 5058581 (1991-10-01), Silvian
patent: 5107833 (1992-04-01), Barsness
patent: 5292343 (1994-03-01), Blanchette et al.
patent: 5324315 (1994-06-01), Grevious
patent: 5476488 (1995-12-01), Morgan et al.
Kamm William E.
Pacesetter Inc.
Romano Malcolm J.
Weinberg Lisa P.
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