Ndd Medizintechnik Ag

Ndd Medizintechnik Gmbh

Ndd Medzintechnik Gmbh

Christian Buess

Felix Daners

Karl Harnoncourt

Erich Kleinhappl

Walter Guggenbuhl

Dieter Patzold

Martin Sengel

Rolf M Schlegelmilch

David Renggli

Fabian FRÖHLICHER

Georg Harnoncourt

Tube for a breath analysis device

The invention relates to a method for verifying a calibration of an ultrasonic spirometer, the method comprising determining an actual value of a distance between a first ultrasonic transducer and a second ultrasonic transducer of a spirometer, determining a difference between the actual value of the distance and a nominal value of the distance that is assigned to the spirometer, and accepting an actual calibration of the spirometer if an absolute value of the difference is smaller than or equal to a first threshold value, or refusing the actual calibration of the spirometer if the absolute value of the difference is bigger than the first threshold value, wherein the first threshold value is 5% of the nominal value of the distance. The invention further relates to a spirometer that is adapted to carry out this method as well as to a method for calibrating a spirometer.

Method for verifying a calibration of a spirometer

A holding device for a breathing tube for use in lung function diagnostics is disclosed. This holding device consists of a material that is transparent for light having a wavelength in a first wavelength range but nontransparent for light having a wavelength in a second wavelength range. In other aspects, a lung function diagnostics device comprising such a holding device and a method for reading out a coding on a surface of a breathing tube for use in lung function diagnostics are disclosed.

Holding device for a breathing tube and method for reading out a coding on a surface of a breathing tube

A method for conditioning a breathing tube for use in lung function diagnostics and a breathing tube made by such a method. This method is characterized by heating at least a section of a fully assembled breathing tube by a heating source to a temperature of at least 40&#xb0; C., wherein heating is performed during a first time period, the first time period lasting between 0.1 seconds and 5 seconds wherein the section includes at least one window covered by a mesh.

Method for conditioning a breathing tube

This invention relates to a breathing tube for use in ultrasonic flow measurement systems for determining the volume flow and/or the molar mass of the respiration of humans and animals. According to the invention, the breathing tube at least partly has a polygonal cross-section. Furthermore at least one indicator is formed on the breathing tube, which can be read out via an external optical device.

Breathing tube for use in ultrasonic flow measurement systems

Breathing tube for lung diagnostics

The invention describes a method that is used to determine the linearization curve of a sensor for specific gas components by combining this sensor with an ultrasonic molar mass sensor. The described method uses the fact that the molar mass sensor exhibits a completely linear response when two gas compositions of differing molar mass values are mixed. Using this feature a non linear-response of a sensor for specific gas components can be determined and a linearization curve can be computed.

Method for the signal linearization of a gas sensor output signal

A method and device are provided for measuring state of lung function of a patient using ultrasonic flow and molar mass measurement. Flow and molar mass signals are recorded during tidal breathing without requiring patient cooperation. Statistical analysis of the recorded data in combination with anthropometirc data and/or data form a questionnaire can be used to diagnose various pulmonary ailments or diseases.

Method for non-cooperative lung function diagnosis using ultrasound

Method for the measurement of the molar mass of gases or gas mixtures

The invention relates to an apparatus for measuring the parameters of respiratory gases comprising a respiratory tube, ultrasonic sensors and pre-amplifier electronic circuitry arranged in a separate housing. In order to prevent dangerous cross infections between patients following repeated utilization of the such measuring apparatus the ultrasonic sensors are permanently integrated in the respiratory tube so that they constitute a single part therewith and in that at least the respiratory tube together with the integrated ultrasonic sensors is designed in the form of an interchangeable part for use once only.

Growing community of inventors

Horgen, Switzerland

Christian Buess