Technische Universitaet Dresden

Other

Dräger Medical Ag & Co Kgaa

Detlev Michael Albrecht

Marcelo Gama De Abreu

The invention relates to a device to determine effective pulmonary blood flow (PBF) by means of partial COrebreathing. The device is characterized in that it comprises an endotracheal tube whose conduit leading from the patient to the respirator is divided up into two lines between a controllabe three-way valve () and a Y-piece; one line forms a larger dead area () for COrebreathing whereby, in order to measure COelimination and end expiratory partial COpressure, a COsensor () and a respiration flow sensor () are provided on the endotracheal tube of the patient. The calculation of effective pulmonary blood flow is provided by a microprocessor/controller () which also controls the three-way valve () which provides the switching between both lines.

Arrangement for the determination of the effective pulmonary blood flow

A breathing gas mixture is provided for the treatment of lung diseases, containing an amount of perfluorocarbon and oxygen containing 5 vol. % to 40 vol. % of perfluorocarbon relative to the amount of perfluorocarbon and oxygen. The amount of perfluorocarbon and oxygen in the breathing gas mixture ranges from about 20 vol. % to a maximum of 100 vol. % of the breathing gas mixture, and the remaining amount of up to about 80 vol. % contains one or more of the gases nitrogen, nitrogen monoxide and/or one or more anesthesia gases or noble gases, especially xenon. Perfluorohexane is an especially preferred perfluorocarbon.

Breathing gas mixture containing perfluorocarbons

The invention relates to a device to determine effective pulmonary blood flow (PBF) by means of partial CO rebreathing. The device is characterized in that it comprises an endotracheal tube whose conduit leading from the patient to the respirator is divided up into two lanes between a controllable three-way valve ( ) and a Y-piece; one lane builds a larger dead area ( ) for CO rebreathing whereby, in order to measure CO elimination and end expiratory partial CO pressure a CO sensor ( ) and a respiration flow sensor ( ) are provided on the endotracheal tube of the patient. The calculation of effective pulmonary blood flow is provided by a microprocessor/controller ( ) which also controls the three-way valve ( ) which provides the switching between both lanes.

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Dresden, Germany

Detlev Michael Albrecht