Abstract:
Un dispositivo para detectar uno o más componentes en el aire de exhalacion incluye un elemento tubular en cuyo extremo se introduce aire de exhalacion y en cuyo otro extremo está unida una placa absorbente que absorbe el(los) componente(s), en donde la placa puede ser desmontada para determinar los componentes en un aparato de medicion.
Abstract:
Una curva de correccion se prepara graficando concentrados de 12CO2 y relaciones de concentracion 13CO2/12CO2 que son determinados en base a una curva de calibracion y absorbencias de 13CO2 y 12CO2 de muestras gaseosas que tienen la misma relacion de concentracion 13CO2/12CO2 pero diferentes concentraciones conocidas de 12CO2; una muestra gaseosa que contiene 13CO2 y 12CO2 como gases componentes se introduce en una celda y se mide espectrométricamente; una concentracion de 12CO2 de la muestra de ensayo gaseoso se determina mediante una medicion espectrométrica; se obtiene un valor de correccion de relacion de concentracion en base a la curva de correccion y la concentracion de 12CO2 de la muestra gaseosa de ensayo determina de este modo; una relacion de concentracion 13CO2/12CO2 se divide por el valor de correccion de relacion de concentracion obtenido de esta forma para corregir la relacion de concentracion 13CO2/12CO2; de este modo, se puede mejorar la precision de la medicion de las relaciones de concentracion de los gases componentes.
Abstract:
An apparatus for continuous monitoring of the respiration of a subject (2), which comprises an elastic or flexible leader-element (1) being adapted to be located around the body of the subject to receive respiration-movements and to transform these to electric signals to be received by a sensing-device connected to said leader-element. The sensing-device is connected to an alarm-device (7,8) which preferably is activated by a micro-processor not until a predetermined time has elapsed since a ceasing or strong weakening of the electric signals.
Abstract:
In a spirometer including an expansible chamber (22) of the piston type there is provided an arrangement for producing an electrical signal which is related to the volume of the chamber (22), said arrangement comprising: an indicia strip (82) associated with the piston (14) of the chamber (22) and including two columns (76, 78) of alternating light and dark bars, the columns (76, 78) being offset from one another by one-half the thickness of a bar; and two photodetectors (72, 74) associated with a fixed member (70) of the spirometer and arranged to respectively observe the columns (76, 78), the photodetectors (72, 74) generating signals which are shifted 90° from one another as the columns (76, 78) pass through their respective field of view and which are continuously sampled as digital words, the consecutive words being compared and the comparison result processed to produce said electrical signal.
Abstract:
A mouthpiece apparatus for a pulmonary function tester, e.g., a spirometer, has a housing with a woven fabric diaphragm positioned across a passage through the housing. The woven fabric diaphragm provides a known differential pressure as a function of air flow, which is substantially the same from unit to unit. A port, capable of being connected to a pressure transducer, is in fluid communication with the passage, and the woven fabric resistance is located downstream of the port. The material used for the woven resistance element is one that is resistant to absorption of moisture and is formed as a monofilament.
Abstract:
Le dispositif comporte un orifice (20) traversé par un flux de gaz allant d'une chambre amont où règne une pres sion P₁ à une chambre aval où la pression est de P₂. Une vanne mobile (21) commandée électriquement laisse ouvert un passage triangulaire de surface déterminée par la posi tion (h) de la vanne, mesurée par un potentiomètre (V.). A partir de cette mesure et de celle de la chute de pression P₂-P₁, un circuit électrique fournit un signal correspondant au débit du gaz. Ce signal peut être comparé à un signal de consigne, et la vanne commandée en rétroaction de ma nière a délivrer un débit prédéterminé, variant au besoin en fonction du temps.
Abstract:
A method and apparatus is disclosed for determining the energy requirements of premature newborns. The method includes identifying a series of groups of newborns in which the age and weight of each newborn within each group are within defined ranges. A characteristic mathematical relationship is generated for each group and relates the mean heart rate to the man energy expenditure over the group. The mean heart rate of a subject newborn is determined and the energy expenditure which is to be determined is measured and applied to the mathematical relationship appropriate to the group into which the subject falls, so as to determine the mean energy expenditure appropriate to that mean heart rate, said expenditure indicating the energy requirement of the subject.
Abstract:
A method and a device for measuring mechanical property parameters of the pulmonary system of a patient which comprises - inflating and deflating the lung with a predetermined gas volume with a pump (13) - measuring the pressure changes generated in the lung during inflation and deflation with a pressure sensor (26) - transforming the volume and the measured pressure data into digital form - calculating typical or clinically significant volume to pressure ratios in a data processor (37) and - displaying the result of the calculation.
Abstract:
An optimum exercise loading apparatus is disclosed which is capable of automatically and real-timely determining optimum exercise load for an individual patient and permitting the patient to carry out loading exercise under the optimum conditions, to thereby accomplish both the satisfied risk management and positive exercise cure of the patient. The optimum exercise loading apparatus comprises a load section (A) for causing a patient to carry out exercise under load, a measuring and analyzing section (B) for carrying out the measuring and analyzing of oxygen intake or VO 2 of the patient during the exercise, and a control section (C) for carrying out the comparison between a measured value of VO 2 and a target value thereof to judge the propriety of load applied to the patient to carry out the feedback control of the load, to thereby place the patient under appropriate load.