Abstract: The invention relates to a method for determining the proportion of molecular oxygen in a respiratory gas, for example in lung function diagnostics, comprising the introduction of the respiratory gas into a measurement tube, transmitting a sound signal by means of a sound transmitter and receiving the sound signal by means of a sound receiver, defining a sound measurement zone by means of the sound transmitter and the sound receiver, determining the average molar mass of the respiratory gas by means of a sound propagation time measured over the measurement zone, and determination of the carbon dioxide content of the respiratory gas with a carbon dioxide gas sensor. The invention also relates to a device for performing the method.

Abstract: A method for determining anatomical dead space in a respiratory tract of a living organizm, include the steps of continuously and simultaneously measuring flow (F) and respiratory air density (D) during exhalation (EX) over time (T). The time is measured from the start of exhalation, in which the flow is greater than zero, until the dead space point at which, after significant decreases following the start, the respiratory air density merges to an approximately constant value. The integral of the flow is formed from the start point until the dead space end point, the measurements of the respiratory air density and the flow from the start until the dead space end point and during the short time, as that time span in which the respiratory air density assumes an approximately constant value, taken place multiple times in each case.

Abstract: A method for determining anatomical dead space in a respiratory tract of a living organism, include the steps of continuously and simultaneously measuring flow (F) and respiratory air density (D) during exhalation (EX) over time (T). The time is measured from the start of exhalation, in which the flow is greater than zero, until the dead space point at which, after significant decreases following the start, the respiratory air density merges to an approximately constant value. The integral of the flow is formed from the start point until the dead space end point, the measurements of the respiratory air density and the flow from the start until the dead space end point and during the short time, as that time span in which the respiratory air density assumes an approximately constant value, taken place multiple times in each case.

Abstract: A lung diagnosis apparatus for measuring the flow, the flow rate, the respiratory air density and the molar mass of a living organism, includes a respiration tube through which respiratory air flows. On the outer surface of the respiration tube, on mutually opposite sides thereof, there are mounted two tube nozzles, of which the longitudinal axis thereof, or the nozzle axis, extends in an inclined manner relative to the longitudinal axis of the respiration tube, or tube axis. In the two tube nozzles, either a first ultrasound transmitter or a first ultrasound receiver is fixed. An electronic module, which actuates the first ultrasound transmitter and the first ultrasound receiver, evaluates their signals. A third tube nozzle and a fourth tube nozzle are arranged on mutually opposite sides of the respiration tube. The longitudinal axes of the third tube nozzle and the fourth tube nozzle define cross-nozzle axes, and extend orthogonally to the tube axis.

Abstract: A lung diagnosis apparatus for measuring the flow rate and molar mass of the respiratory air of a living organism includes a respiration tube, through which respiratory air can flow. On the outer surface of the respiration tube there are mounted two tube nozzles for which the longitudinal axis, or nozzle axis, extends in an inclined manner relative to the longitudinal axis, or tube axis, of the respiration tube, and in which a first ultrasound transmitter or a first ultrasound receiver is fixed. An electronic module, which actuates the ultrasound transmitter and the ultrasound receiver also evaluates their ultra-sound signals. The nozzle axis for each tube nozzle pass through a reflection point on the inner surface of the respiration tube.

Abstract: An apparatus for determining the impedance (Zaw) of a patient's respiratory tract, by measuring the alternating pressure (dp) in the region of the patient's mouth after producing an oscillating air pressure signal, includes a mouthpiece, an electroacoustic transducer having a mechanical oscillation system for generating the oscillating air pressure signal, a tube for connecting the electroacoustic transducer to the mouthpiece, a reference resistance for determining the reference impedance (Zref), and a computing device for calculating the impedance (Zaw) of the respiratory tract on the basis of the reference impedance (Zref) of the reference resistance, the entire impedance (Zges) and the entire phase angle (Phi). The change in the deflection of the mechanical oscillation system on the electroacoustic transducer, caused by the alternating pressure (dp) of the breathing of the patient, can be measured in a contactless manner using at least one measuring device.

Abstract: An apparatus for determining the impedance (Zaw) of a patient's respiratory tract, by measuring the alternating pressure (dp) in the region of the patient's mouth after producing an oscillating air pressure signal, includes a mouthpiece, an electroacoustic transducer having a mechanical oscillation system for generating the oscillating air pressure signal, a tube for connecting the electroacoustic transducer to the mouthpiece, a reference resistance for determining the reference impedance (Zref), and a computing device for calculating the impedance (Zaw) of the respiratory tract on the basis of the reference impedance (Zref) of the reference resistance, the entire impedance (Zges) and the entire phase angle (Phi). The change in the deflection of the mechanical oscillation system on the electroacoustic transducer, caused by the alternating pressure (dp) of the breathing of the patient, can be measured in a contactless manner using at least one measuring device.

Abstract: The invention concerns a method for creating an individual movement and load profile, where the absolute altitude is measured continuously, the movement and/or acceleration is recorded in all three directions in space, and the physiological load upon the test subject is calculated from the path and altitude profile and the cardial and pulmonary measured variables.

Abstract: Method for determining the flow rate and/or the molecular mass of liquid or gaseous media in flow measuring instruments, especially pneumotachographs, with the aid of the measurement of the transit time of ultrasonic pulses in the medium between two ultrasonic transmitters/receivers, especially piezoelectric transmitters/receivers, where an ultrasonic impulse is emitted from a transmitter (1), and simultaneously the run of a time duration starts which is slightly shorter than the transit time in the static medium, after the end of the time duration the discharge of a capacitor, to which a voltage is applied, commences with a constant current intensity, the discharge is terminated with the registration of the ultrasonic pulse in the receiver (2), the voltage still applied to the capacitor is measured and the discharge time is determined, the transit time from the time duration and the discharge is added up, the measurement of the transit time is repeated in the opposite direction, and the flow rate and/or the

Abstract: Whole body plethysmograph for medical lung examinations having a pressure gauge (8) that responds to the interior pressure of cubicle (1), a pneumo-tachometer (5) which is disposed in cubicle (1) and is provided with a mouthpiece (4), a signal transmitter for the temperature difference between the inspired and the expired air, an output device (28) and an evaluation unit (7) with signal inputs (10, 18, 20, 25), to which are connected signal lines (6) from pressure gauge (8), from pneumo-tachometer (5) and from the signal transmitter for the temperature difference, having a signal output (11 ) for the respiratory flow rate measured by pneumo-tachometer (5) and a signal output (27) for the interior pressure measured by pressure gauge (8), which is at least partially corrected for temperature-caused pressure fluctuations by evaluation unit (7), whereby the two signal outputs (11, 27) are connected to output device (28) via signal lines (6), whereby the signal transmitter for the temperature difference is an ultr

Abstract: A whole-body plethysmograph having a calibration of the pressure gauge is provided, which includes an air tight, lockable cubicle for the reception of a person to be examined, a cubicle-pressure pressure gauge that responds to the interior pressure of the cubicle. A mouthpiece is provided with a valve, by means of which the respiratory air flow can be barred, and a closure-pressure pressure gauge is connected to the mouthpiece for measuring the pressure in the mouth of a person, as well as an evaluation unit connected to both the cubicle-pressure pressure gauge and the closure-pressure pressure gauge. A piston pump is connected to said cubicle, so as to be air tight. The piston pump is surrounded by the air tight box, to which the closure-pressure pressure gauge is, at times, connected for calibration and the pressure fluctuations generated by the piston pump are used to calibrate the cubicle-pressure pressure gauge and the closure-pressure pressure gauge.

Abstract: A vessel is disclosed for receiving exhaled air in order to measure lung function. The vessel includes a container with two facing inlets which admit exhaled air alternatively. The container houses: either a piston which can slide in the direction of the inlets, and switches which are actuated when the position reaches the wall of the container, whereupon air is admitted through the other inlet; or, two contiguous bags to each of which air is admitted by one inlet so that they move alternately, and a switch which when actuated causes air to be admitted through the other inlet.