Systems and methods for ex vivo lung care

A - Human Necessities – 01 – N

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A01N 1/02 (2006.01) C12M 3/00 (2006.01) G01N 33/48 (2006.01)

Patent

CA 2713443

Methods and systems of maintaining, evaluating, and providing therapy to a lung ex vivo. The methods and systems involve positioning the lung in an ex vivo perfusion circuit; circulating a perfusion fluid through the lung, the fluid entering the lung through a pulmonary artery interface and leaving the lung through a left atrial interface; and ventilating the lung by flowing a ventilation gas through a tracheal interface. Maintaining the lung for extended periods involves causing the lung to rebreath a captive volume of air, and reaching an equilibrium state between the perfusion fluid and the ventilation gas. Evaluating the gas exchange capability of the lung involves deoxygenating the perfusion fluid and measuring a time taken to reoxygenate the perfusion fluid by ventilating the lung with an oxygenation gas.

Cette invention concerne des méthodes et des systèmes de maintien, dévaluation et dadministration dun traitement des poumons ex vivo. Les méthodes et les systèmes impliquent la mise en place des poumons dans un circuit de perfusion ex vivo ; la circulation dun liquide de perfusion dans les poumons, le liquide pénétrant dans les poumons par une interface artère pulmonaire et quittant les poumons par une interface oreillette gauche ; et la ventilation des poumons en faisant circuler un gaz de ventilation par une interface trachée. Le maintien des poumons pendant des durées prolongées implique de forcer les poumons à re-respirer un volume dair captif, et à atteindre un état déquilibre entre le liquide de perfusion et le gaz de ventilation. Lévaluation de la capacité des échanges gazeux des poumons implique la désoxygénation du liquide de perfusion et la mesure dune durée nécessaire pour ré-oxygéner le liquide de perfusion en ventilant les poumons avec un gaz doxygénation.

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