Abstract: Particularly for diabetes therapy, it is desirable to continuously infuse insulin in varying installments into the body of the patient. A control device serves as a program transmitter for a microdosing unit. The physician should be able to pre-program the daily profile of the infusion and, if necessary, to change it. According to the disclosure, at least the control device for the microdosing unit has memory means for a prescribable control program allocated to it, whereby the control program is pre-programmable in discrete time steps by an external programming device corresponding with a 24 hour daily sequence. The control device is detachably connected directly with the programming device or is coupled therewith by means of a program carrier or a programmed memory chip solely for a rapid transfer of the pre-programmed control program into the internal memory means of the control device.

Abstract: Respiratory flow rate is measured independent of gas type by establishing a supplementary flow component of the respiratory medium via a supplementary sensor modeled according to flow rate ratio after the primary respiratory flow sensor such that the sensors are subject to respective corresponding errors in dependence on the same parameter of any of the respective respiratory media. The respiratory flow signal is continuously corrected in dependency on the currently existent composition of the respiratory medium by forming the quotient of the respiratory flow signal and the supplementary signal from the supplementary sensor. In a second disclosed embodiment, the supplementary flow component is coupled to the primary respiratory flow sensor so that similitude is automatically provided. Either embodiment may be utilized to provide an inverse of the supplementary signal as a measure of a composition-dependent parameter such as viscosity, density or temperature coefficient of the respiratory gases.

Abstract: In the illustrated embodiments, medication is stored in an implantable housing in solid form, and solvent is supplied to the solid medication to form the infusion fluid as needed for maintaining the desired dosage rate. The rate of supply of solvent may be controlled to insure a saturated solution of the medication under all operating conditions. The solvent may be the local bodily fluid which enters the housing via a semipermeable membrane, or a sealed solvent reservoir may be provided within the housing.

Abstract: An apparatus for infusion of liquids into human or animal bodies which comprises a liquid reservoir having a reduced-pressure generating means associated therewith and an active delivery-dosing means, such as a roller pump, operationally coupled with the reservoir and with an outflow catheter having outflow opening within the body being infused. The reduced-pressure generating means, such as a volatile fluid, for example, a halogenated hydrocarbon, maintains a pressure at the point of connection between the reservoir and the active delivery-dosing means at a reference value which is lower than the pressure prevailing at the outflow opening of the outflow catheter.

Abstract: Respiratory flow rate is measured independent of gas type by establishing a supplementary flow component of the respiratory medium via a supplementary sensor modeled according to flow rate ratio after the primary respiratory flow sensor such that the sensors are subject to respective corresponding errors in dependence on the same parameter of any of the respective respiratory media. The respiratory flow signal is continuously corrected in dependency on the currently existent composition of the respiratory medium by forming the quotient of the respiratory flow signal and the supplementary signal from the supplementary sensor. In a second disclosed embodiment, the supplementary flow component is coupled to the primary respiratory flow sensor so that similitude is automatically provided. Either embodiment may be utilized to provide an inverse of the supplementary signal as a measure of a composition-dependent parameter such as viscosity, density or temperature coefficient of the respiratory gases.

Abstract: An apparatus for the determination of the respiratory passageways resistance, including a flow resistance in the breathing or respiratory flow passageway, whose resistance value is periodically varied by a frequency which lies above the breathing frequency, and including as well a pressure and/or, as occasioned, a flow measurement gauge. In conjunction with the flow resistance, the resistance value thereof is varied in an essential sinusoidal manner, and the pressure and/or flow measurement gauge incorporates two measuring passageways, there being detected in the first passageway only the pressure and/or occasioned flow components in the respiratory passageway due to the lower frequencied breathing, and in the second passageway the higher frequencied resistance variations.

Abstract: An apparatus for the determination of the respiratory passageway resistance, including a breathing tube which incorporates a flow resistance and a pulse generator for subjecting the breath flow to higher frequency pressure or, respectively, current pulsations, as well as a pressure gauge for measuring the pressure in the breathing tube. The pressure gauge is constituted of an alternating pressure gauge coordinated with the pulsating frequency of a pulse generator. As alternating pressure gauge there may be utilized a common mechanical-electrical transducer which, for detection of the alternating pressure, has an electrical frequency filter connected thereto.

Abstract: An apparatus for the determination of the respiratory passageway resistance. Apparatus of that type in general evidence a flow resistance located in the respiratory passageway, whose resistance value is periodically varied at a frequency which is located above the breathing frequency, or a breathing tube with a flow resistance and a pulse generator for subjecting the breath flow with higher-frequencied pressure- or, respectively flow pulsations.

Abstract: An apparatus for the determination of the respiratory passageways resistance, including a flow resistance in the breathing or respiratory flow passageway, whose resistance value is periodically varied by a frequency which lies above the breathing frequency, and including as well a pressure and/or, as occasioned, a flow measurement gauge. In conjunction with the flow resistance, the resistance value thereof is varied in an essential sinusoidal manner, and the pressure and/or flow measurement gauge incorporates two measuring passageways, there being detected in the first passageway only the pressure and/or occasioned flow components in the respiratory passageway due to the lower frequencied breathing, and in the second passageway the higher frequencied resistance variations.

Abstract: A flow measuring device, particularly a breathing flow receiver for the diagnosis of lung functioning has a flow pipe with a built in diaphragm, from which pressure difference produced by blowing is measured. The device is particularly characterized in that an elastic body, for example, a membrane, is used as the diaphragm, the opening of which changes within the operating range of the pipe by elastic deformation corresponding to flow pressure.