Probe and system for detecting probe dislodgement
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United States of America Patent
Stats
-
Oct 20, 1981
Grant Date -
N/A
app pub date -
Oct 26, 1979
filing date -
Oct 26, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A contact probe arranged to detect dislodgement of the probe from a body to which it has been attached. Probe dislodgement is detected by sensing an increased radiation level falling on a main sensor (14) located in the contact surface (10a) of the probe. The main sensor cooperates with a reference sensor (16) located in another surface (10b) of the probe which receives radiation reflected from the skin of the body to which the probe is attached. The reference sensor (16) provides a floating reference for the main sensor (14). In addition to providing an indication of probe dislodgement, the two sensors cooperate to develop an indication when they are shielded from the radiation source, thereby rendering the probe inoperative to sense probe dislodgement.
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