METHOD FOR DETERMINING THE ENERGY REQUIREMENT OF PATIENT IN CRITICAL CONDITION ON SPONTANEOUS BREATHING IN REAL TIME Russian patent published in 2021 - IPC A61B5/83 A61B5/97 A61B5/91 A61M16/00 

FIELD: medical technology.

SUBSTANCE: invention relates to medical technology, and in particular to a method for determining the energy requirement of a patient in a critical condition on spontaneous breathing in real time. The method includes studying the energy demand of a patient in a critical state on spontaneous breathing using a GKMP-02 gas analyzer isolated from the Phaza-5NR apparatus, a Vamos® analyzer isolated from the Fabius® anesthesia apparatus, in which the energy demand is determined on the spontaneous breathing of a patient in a critical state in real time mode, kcal/min. A critically ill patient breathes spontaneously through a face mask with a minimum length of the inspiratory-expiratory line. When inhaling, the air mixture from the atmosphere enters the ventilator, isolated from the Phaza-5NR apparatus, built into the inspiratory line, which fixes the tidal volume on inspiration - Vt_i, ml, and then from the main through the tee to the oxygen sensor of the GKMP-02 gas analyzer, isolated from the apparatus Phaza-5NR, which registers the oxygen content in the air mixture during inhalation - F_iO₂, %. Then the air mixture is fed through the line and the non-reversing valve through the tee into the connector connected to the face mask, and then into the patient's lungs. Then the air mixture is fed through the line and the non-reversing valve through the tee into the connector connected to the face mask, and then into the patient's lungs. When exhaling, air from the patient's lungs enters the face mask, connector, line, tee, expiratory line, and at this time the non-reversing valve closes the inspiratory line. Then the air is directed through the expiratory line to the ventilator, isolated from the Phaza-5NR apparatus, which records the tidal volume on expiration - Vt_e, ml, then the air mixture is fed through the expiratory line through the tee to the oxygen sensor of the GKMP-02 gas analyzer isolated from the Phaza-5NR apparatus, which registers the oxygen content in the air mixture on exhalation - F_eO₂, %. In the connector in front of the face mask there is a built-in sensor for air intake in the side stream, which transfers air through the line to the moisture separator, and from there to the Vamos® analyzer, isolated from the Fabius anesthesia machine, which displays information on the carbon dioxide content in the air mixture during inhalation - F_iCO₂, %, carbon dioxide content in the air mixture in the final portion of exhaled air - F_etCO₂, %. After calibrating the equipment during spontaneous breathing of the patient on the monitors of the GKMP-02 gas analyzers isolated from the Phaza-5NR apparatus, the Vamos® analyzer isolated from the Fabius® anesthesia device, data are obtained that make it possible to determine Vt_i, F_iO₂ and F_iCO₂, Vt_e, F_eO₂ and F_eCO₂ in real time, on the basis of the data obtained, oxygen consumption, elimination of carbon dioxide, and then the energy requirement of a patient in a critical condition on spontaneous breathing are calculated in real time, kcal/min.

EFFECT: determination of the energy requirement of a patient in a critical condition during spontaneous breathing in real time (kcal/min).

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