System for detecting air
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United States of America Patent
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Apr 15, 2008
Grant Date -
Mar 8, 2007
app pub date -
Nov 8, 2006
filing date -
Apr 20, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dual port syringe has an upper port for connection to a fluid reservoir and a lower port for delivery of the medical fluid under pressure to a patient. A first valve is connected between the fluid reservoir and the upper port, and second valve is connected between the lower port and the patient. During a fill operation, a piston is moved within the syringe to drawn fluid from the reservoir into the syringe through the upper port. During injection operation, the piston moves in an opposite direction to force fluid out of the syringe through the lower port.
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