EXHALED GAS MEASUREMENT COMPENSATION DURING HIGH FLOW RESPIRATORY THERAPY

• Main Authors: HERMEZ, Laith Adeeb, GULLIVER, Laurence, KEOGH, Geraldine, EVANS, Alicia Jerram Hunter, OLDFIELD, Samantha Dale, ASSI, Milanjot Singh, SPENCE, Callum James Thomas, WHITE, Craig Karl, PAYTON, Matthew Jon
• Format: Patent
• Language: English; Lithuanian
• Published: 10.04.2024
• Subjects: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY; DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEDICAL OR VETERINARY SCIENCE; SURGERY

The present disclosure relates to determining a corrected exhaled gas measurement during high flow respiratory therapy. Measuring exhaled gas concentration during high flow respiratory therapy is difficult and inaccurate due to a phenomenon known as flushing. The high flows delivered to the patient flush the dead space in the conducting airways, which causes a dilution effect that results in underestimated or overestimated exhaled gas measurement depending on the gas composition delivered by the high flow system. This can lead to incorrect clinical measurements and diagnoses. Various algorithms are disclosed herein to account for the dilution effect caused by flushing, allowing for the method of measuring gas concentrations to still be used accurately for clinical measurements.