Cannula for the separation of inhaled and exhaled gases
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United States of America Patent
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Oct 5, 2004
Grant Date -
N/A
app pub date -
Apr 20, 2002
filing date -
Apr 21, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved nasal cannula for isolating, monitoring and measuring the content of a patients exhaled gases. The cannula includes an integral connector that is attached to the wall of a hollow nare to create a gas-tight interface. The other end of the connector is attached to tubing that forms an integral seal with the cannula port to create a continuous, gas-tight flow channel that is separated from the hollow cannula body. The integral connector provides a direct, isolated flow channel that eliminates the undesirable dead space in which exhaled gases from a patient can be entrapped and stagnate, resulting in cross contamination.
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