Automatic high temperature venting for inflatable medical devices
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United States of America Patent
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-
Jan 20, 2004
Grant Date -
Dec 18, 2003
app pub date -
Jul 23, 2002
filing date -
Jun 18, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The disclosed medical device includes an inflatable structure configured for positioning in an airway of a human patient and a valve in fluid communication with the inflatable structure. The valve includes a member that is movable between an open position and a closed position. The valve prevents fluid from escaping the inflatable structure when the member is in the closed position. The valve permits fluid to escape the inflatable structure when the member is in the open position. The valve includes a resilient element. The resilient element provides a first force that biases the member towards the closed position. The valve includes a temperature sensitive element. The temperature sensitive element generates a second force that biases the member towards the open position. The first force is greater than the second force when the ambient temperature is below a first value. The first force is smaller than the second force when the ambient temperature is above a second value.
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