US 12,465,707 B2
System for ventilation of a being
Peter Kremeier, Karlsruhe (DE); and Christian Woll, Oetigheim (DE)
Assigned to LOEWENSTEIN MEDICAL TECHNOLOGY S.A., Luxembourg (LU)
Filed by Loewenstein Medical Technology S.A., Luxembourg (LU)
Filed on Dec. 3, 2021, as Appl. No. 17/457,455.
Claims priority of application No. 102020007506.1 (DE), filed on Dec. 7, 2020; and application No. 102020007492.8 (DE), filed on Dec. 8, 2020.
Prior Publication US 2022/0176052 A1, Jun. 9, 2022
Int. Cl. A61M 16/00 (2006.01); G16H 20/40 (2018.01)
CPC A61M 16/024 (2017.08) [G16H 20/40 (2018.01); A61M 2230/42 (2013.01); A61M 2230/65 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system for ventilation of a being, wherein the system comprises at least one ventilator and at least one electro impedance tomography (EIT) measuring device, the ventilator comprising at least one controllable respiratory gas source and a programmable control unit for controlling the respiratory gas source, and the EIT measuring device comprising at least one sensor apparatus for measuring impedance values of at least one lung of the being and at least one calculation and evaluation unit, the system assigning impedance values measured by the at least one sensor apparatus to pixels n, and the programmable control unit being configured
a. to specify ventilation settings in a reference phase (R) of the respiratory gas source, impedance values being recorded at at least one point in time in the reference phase (R) and a first characteristic CR,n being calculated from the recorded impedance values for each pixel n, and
b. to specify ventilation settings in at least one test phase (T1) of the respiratory gas source following the reference phase (R), the ventilation settings differing from the ventilation settings of the reference phase (R) with respect to at least one ventilation setting, and impedance values being recorded at at least one point in time in the test phase (T1) and a second characteristic CT1,n being calculated from the recorded impedance values for each pixel n;
and wherein an end-expiratory hold maneuver (EH1, EH2) and an end-inspiratory hold maneuver (IH1, IH2) are carried out during a measurement phase (M1, M2), the measurement phase (M1, M2) comprising at least two breaths and the end-expiratory hold maneuver (EH1, EH2) being carried out during an expiration phase of a second-to-last breath and the end-inspiratory hold maneuver (IH1, IH2) being carried out during an inspiration phase of a last breath.