Measuring detector and system for the measurement of gas flow
AssigneeInstrumentarium Corp.
InventorsKurt Weckstrom, Antti Kleemola
Life of this patent
Estimating the term…
Abstract
Measuring transducer and system for the measurement of gas flow, especially for the measurement of the pressure and/or flow of a patient's respiratory gas. The surface of the flow channel (1) wall (2) and/or a restricting element (3) in the flow channel which is directly exposed to the gas flow to be measured is provided with a material retaining water inside it.
Claims39
A measuring transducer for the measurement of gas flow, including the measurement of the pressure and/or flow of a patient's respiratory gas, which measuring transducer comprises:
- a tubular flow channel (1) for conveying the gas flow to be measured, said flow channel being delimited by a wall (2) having an interior surface exposed to the gas flow to be measured;
- a restricting element (3) disposed in the flow channel to restrict gas flow in the flow channel and presenting a surface exposed to the gas flow to be measured;
- and
- measuring channels (4) opening into the flow channel for the measurement of the pressure difference caused by the restricting element,
- at least one of said surface of the flow channel wall (2) and surface of the restricting element (3) being capable of retaining water inside it to remove water drops or drops containing water from said surface.
A system for the measurement of the pressure and/or flow of a respiratory gas of a patient, comprising;
- an incubation tube (I) to be inserted into a patient's windpipe;
- a measuring transducer (D) connected to the incubation tube and comprising a tubular flow channel (1) for conveying the gas flow to be measured, said flow channel being delimited by a wall (2) having an interior surface exposed to the gas flow to be measured;
- a restricting element (3) disposed in the flow channel to restrict gas flow in the flow channel and presenting a surface exposed to the gas flow to be measured;
- a measuring device (8) for measuring the pressure difference caused by the restricting element;
- and
- measuring channels (4) opening into the flow channel for passing the pressure from the flow channel to the measuring device, at least one of said surface of the flow channel wall (2) and surface of the restricting element (3) being capable of retaining water inside it to remove water drops or drops containing water from said surface.
Dependencies are inferred from the claim text.