Abstract: In a process for the quantitative detection of a given gas and in a device for the quantitative detection of a given gas, a gas sample (3), which may contain the given gas as a component, is irradiated with a diode laser (1) operating in a single mode and free of mode jumps, the wavelength of which being continuously tuned by varying the laser control current. The laser control current is varied by superimposing a sinus modulation current of a predetermined frequency to a periodically varied d.c. component so that a laser wavelength range is scanned in the area of the absorption line of the given gas. The intensity of the laser radiation after passing through the gas sample is measured by means of a detector. The d.c. component of the detector signal and the second harmonic of the detector signal corresponding to the doubled frequency of the sinus modulation current are determined.

Abstract: A respirator with an inhalation line (5) connected to a gas supply device (2) and with an exhalation line (7) connected to an exhalation device (3), with a Y piece (8) connecting the inhalation line (5) to the exhalation line (7), and with a patient connection (9) going out from the Y piece (8). Partial rebreathing of CO2-containing exhaled air is made possible in a simple manner by providing a switchover device (4) between the inhalation line (5) and the gas supply device (2) as well as between the exhalation line (7) and the exhalation device (3). The switchover device is designed such that the flow connection is established between the inhalation line (5) and the gas supply device (2) as well as the exhalation line (7) and the exhalation device (3) in a first switching position and there is at least a flow connection between the gas supply device (2) and the exhalation line (7) in the second switching position.

Abstract: A device for the noninvasive blood pressure measurement with a cuff and with a corresponding control and evaluating circuit. The device provides improvements in terms of the signal resolution. On the one hand, the cuff (1) is connected via a pressure sensor with pressure transducer (4) to a downstream amplifier (5), which is preferably designed as an operational amplifier, and to an analog-digital converter (6) arranged directly downstream of the amplifier (5) with the computing and control unit (2). On the other hand, the computing and control unit (2) is connected to the cuff (1) via an electronically driven pressure transducer (3).

Abstract: An installation duct for accommodating at least gas outlet couplings shall be improved such that the gas supply lines leading to the gas outlet couplings can be laid and connected in a simple manner. This is accomplished with the features of a connection plate (3), on which the gas outlet couplings (4, 5) are fastened, with a middle part (6) that can be placed on the connection plate (3), and with a cover plate (7), which is fastened to end parts (21, 22) of the side walls (13, 14) of the installation duct (1) pointing away from the connection plate (3).