Rhinological diagnostic device
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United States of America Patent
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-
Aug 7, 1990
Grant Date -
N/A
app pub date -
Feb 10, 1989
filing date -
Feb 10, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rhinological diagnostic device in the form of a multi-layer sheet comprising, from top to bottom, a transparent plastic layer, a thermochromic liquid crystal layer, a black coating layer and a support layer. In use, this multi-layer sheet is positioned beneath the nose to cause expired air from the nostrils to impinge on the transparent plastic layer for diagnosing an abnormality in the nasal cavity based on the resulting topographic color pattern in said thermochromic liquid crystal layer.
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