公开(公告)号：US20230330377A1

公开(公告)日：2023-10-19

申请号：US18028947

申请日：2021-09-27

Applicant: UNIVERSITEIT TWENTE

Inventor： Rob HAGMEIJER ,  Rutger Hendrik Johan HEBBINK

IPC: A61M16/06

CPC classification number: A61M16/0672 ,  A61M2016/0027

Abstract: A method for monitoring a system for injecting heated air into a patient. The system includes a source of air, a device for heating the air, a cannula for insertion into nostrils of the patient, a first conduit interconnecting the source and the device, and a second conduit interconnecting the device and the cannula. The method includes deriving pressure in the cannula from pressure of the air between the source and the cannula. The method includes measuring a pressure of the air at between the source and the cannula, determining a flow rate of the air in the system, deriving a first function representative of a respiratory flow rate of the patient from the measured pressure and the system air flow rate, deriving a second function representative of a respiratory volume of the patient from the measured pressure and the system air flow rate, and graphically displaying the functions.

公开(公告)号：US20230363666A1

公开(公告)日：2023-11-16

申请号：US18028998

申请日：2021-09-27

Applicant: UNIVERSITEIT TWENTE

Inventor： Rob HAGMEIJER ,  Rutger Hendrik Johan HEBBINK

IPC: A61B5/087 ,  A61B5/091

CPC classification number: A61B5/087 ,  A61B5/091 ,  A61B2562/0247 ,  A61B5/742

Abstract: A method for determining a scaled respiratory flow rate and volume during respiration of a patient includes a) successively determining a plurality of values for a difference between a pressure in at least a first location in an upper respiratory tract of the patient and a reference pressure, b) deriving the scaled respiratory flow rate from the plurality of values for the pressure difference by using a first relationship, c) deriving the scaled respiratory volume from the plurality of values for the pressure difference by using a second relationship, and d) displaying the scaled respiratory flow rate derived in step b) and the scaled respiratory volume derived in step c) or a further variable derived from the scaled respiratory flow rate and volume in a graphical representation. Step a) is performed during tidal breathing of the patient. A system for performing the aforementioned method.