DEVICE AND METHOD FOR GAS MIXING CONTROL Russian patent published in 2015 - IPC A61M16/12 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medical equipment. A pressure fluid fan into patient's airways comprises a first gas supply line and a second gas supply line with the second gas mixed with the first gas to prepare the mixed gas having a certain ratio of the second gas. A pipe line is used to supply the mixed gas from the first and second lines into an inlet during the phase of inhalation and to supply the exhaled gas from the inlet into the first line during the phase of exhalation. The regulator aims at delaying the second gas supply from the second line by a time of delay to maintain a certain ratio of the second gas in the mixed gas supplied into the inlet during the following phase of inhalation. The regulator is configured to determine a time of delay on the basis of an amount of exhaled gas supplied into the first line during the phase of exhalation. What is disclosed is an alternative version for implementing the fan involving mixed gas supply units.

EFFECT: avoiding the oxygen contamination of the air lines by a simple method.

15 cl, 3 dwg