Other

Dr&auml;ger Medizintechnik Gmbh

Dieter Engel

Claus Bunke

Rainer Kunz

Matthias Witt

G&ouml;tz Kullik

J&uuml;rgen Manigel

Thomas Leyer

A respiratory flow sensor, which is suitable for use near a patient, covers a broad gas volume flow measuring range with a low breathing flow resistance and good, reproducible measured signal quality at the same time. The respiratory flow sensor has a first air resistance body ( ) with a blunt end and with an opposite pointed end. The air resistance body ( ) is arranged between the measuring transducer ( ), of which there is at least one, and the patient-side end (P) of the respiratory flow sensor. The pointed end of the first air resistance body ( ) points toward the measuring transducer ( ). A second air resistance body ( ) with a pointed end is arranged between the measuring transducer ( ), of which there is at least one, and the end of the respiratory flow sensor that is away from the patient. The pointed end of the second air resistance body ( ) also points toward the measuring transducer ( ).

Respiratory flow sensor with flow channel having a measuring transducer and air resistance body

An improved respirator with a breathing circuit ( ) and a corresponding process for operating the respirator are provided. Defined breathing gas volumes can be delivered to the patient and the current operating state can be reliably monitored despite a strong breathing gas volume flow being delivered in the breathing circuit ( ). A gas delivery element ( ) designed as a rotary compressor is connected on the inlet side to a reversible breathing gas reservoir ( ) and on the outlet side to a patient connection piece ( ) for inspiration via a first gas volume flow sensor ( ) with a first nonreturn valve ( ). A second gas volume flow sensor ( ) is located in the connection line between the patient connection piece ( ) and the patient being inspirated. The patient connection piece ( ) is connected for expiration to a second nonreturn valve ( ) via a third gas volume flow sensor ( ) and to the reversible breathing gas reservoir ( ) via a controllable shut-off valve ( ). At least one measuring and control device ( ) is connected to the gas volume flow sensors ( ), it receives their measured signals and sends control signals to the gas delivery element ( ) and to the controllable shut-off valve ( ).

Respirator with a breathing circuit

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Reinfeld, Germany

Dieter Engel