MRI-compatible medical device with passive generation of optical sensing signals
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United States of America Patent
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Mar 23, 2004
Grant Date -
Oct 16, 2003
app pub date -
Apr 11, 2002
filing date -
Apr 11, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical sense signal generator for medical device's having a photonic catheter containing optical conductors conducting light energy in two directions between electronics at a catheter proximal end and electrical stimulation and sensing components at a catheter distal end. An optical unit receives light delivered from the catheter proximal end and transmits a first portion of the light while diverting a second portion of the light. The transmitted light is fed to an opto-electrical converter for conversion into electrical stimulation signals. The diverted light is directed to one or more optical modulators that modulate the diverted light output under an applied electrical signal. An electrical circuit generates electrical sense signals corresponding to one or more sensed physiological conditions and provides the signals to the optical modulator(s). This results in modulation of the diverted light output into optical sense signals that are transmitted to the catheter proximal end.
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