Process and signal processing unit for determining a pneumatic parameter with the use of a lung-mechanical model and of a gradient model

US11890416B2 · kind B2 · utility

Assignee

• DRÄGERWERK AG & CO. KGAA · DE

Inventors

• Marcus Eger · Stade, DE
• Philipp Rostalski · Lübeck, DE
• Eike PETERSEN · Lübeck, DE
• Jan Grasshoff · Lübeck, DE

Key dates

• Filing date: Jan 6, 2021
• Grant date: Feb 6, 2024
• Expiry date: May 30, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G16H20/40
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A process and a signal processing unit determine a pneumatic parameter (Pmus) for the spontaneous breathing of a patient. The patient is ventilated mechanically by a ventilator. A lung-mechanical model (20) and a gradient model (22) are preset. The lung-mechanical model (20) describes a relationship between the pneumatic parameter (Pmus) as well as a volume flow signal (Vol′), a volume signal (Vol) and/or a respiratory signal (Sig), which can be measured. The gradient model (22) describes a value for the pneumatic parameter (Pmus) as a function of N chronologically earlier values of the pneumatic parameter (Pmus) or of a variable correlating with the pneumatic parameter (Pmus). N values for the correlating variable are determined at first. At least one additional value is subsequently determined for the pneumatic parameter (Pmus). N chronologically earlier values of the correlating variable, current signal values, the lung-mechanical model (20) and the gradient model (22) are used for this purpose.