Implantable device with optical telemetry
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United States of America Patent
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-
Feb 19, 2002
Issued Date -
N/A
app pub date -
Mar 26, 2001
filing date -
Jun 12, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system is provided for optically communicating with an implantable device. In one embodiment, the system includes an implantable device having a large memory and an external unit which downloads information from the memory for analysis and display. The implantable device includes a light-emitting diode (LED) and a modulator for driving the LED. Although various frequencies can be used, frequencies which experience relatively little attenuation through body tissue are presently preferred. The external device includes a photo-multiplier tube (PMT) and a demodulator for equalizing and demodulating the detection signal produced by the PMT in response to detected light. A high bandwidth channel (perhaps as much as 500 Mbits/sec) is created by these components. This channel advantageously allows for a substantially reduced download time.
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