Method and apparatus for measuring pulmonary blood flow by pulmonary exchange of oxygen and an inert gas with the blood
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United States of America Patent
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Dec 9, 2003
Grant Date -
Feb 27, 2003
app pub date -
May 1, 2002
filing date -
Oct 25, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for measuring pulmonary blood flow in a subject by pulmonary exchange of oxygen and an inert gas with the blood using a divided respiratory system. One method of isolating two or more divisions of the respiratory system uses a multi-lumen cuffed endobronchial catheter. In one embodiment, a triple-lumen cuffed endobronchial catheter is provided. In another embodiment, gas mixtures are supplied to each lumen using a bag-in-a-box type ventilator for each breathing system for synchronizing the rate and pressure of mixed gas supplied to the lumens.
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