From a publicity photo. Undated but likely around 1995.
Category Archives: Metabolic Cart
Sensormedics MMC Horizon, 1986
From “A computer program for the interpretation of exercise tolerance tests” by Michael B. Jaffe, Computer Methods and Programs in Biomedicine, 1986; 23: page 135.
Metabolic system, PULMOSPORT, Fenyves & Gut, circa 1970
From a Fenyves & Gut sales brochure kindly provided by Emanuele Isnardi.
“One possible extension of the S basic unit is designed to determine the gas exchange or G or perform ergospirography, respectively, this representing a SG assembly. Unlike rival products this unit operates without valves, i.e. under optimum physiological conditions. For it should be noted that there are still systems on the market which require the subject to inhaled through a mask fitted with inspiration valves and exhale through a hose fitted to the mask. Of course such systems cannot work satisfactorily since they involve inspiration valves and because dead-space air is re-inhaled from the expiration hose. Our system has overcome these drawbacks.
Principle of measurement: the expired gases are continuously drawn off while changes in concentration levels occur. However, the average values necessary for further processing (e.g. O2 uptake) are drawn off in proportion to the expiratory flow rate by a special pump of our own design which can be modulated very rapidly. The expirate is then stored in a small collecting vessel. The resulting weighted samples are then analyzed in on-line analyzers for their O2 and CO2 concentrations (ΔFO2 and ΔFCO2 respectively).
Essentially the G apparatus consists of a slide-in unit for extraction proportionate to the flow of respiratory gases during expiratory phases. A device for averaging and converting the pulsating gas flow to a steady state required by the analyzers is included. The necessary equipment comprises O2 and CO2 and, optional, N2 analyzers (see under A), as well as a multi-channel compensated direct recorder (see under R). We recommend our slide-unit for determining the MV directly (unnecessarily if the assembly includes a computer) because it no only reduces working time, but also compensated for the time-lag occuring between the ΔFO2 and respectively, ΔFCO2 quantities on the one hand, and the minute volume on the other.”
Exercise Analogue Computer, Fenyves & Gut, circa 1970
From a Fenyves & Gut sales brochure kindly provided by Emanuele Isnardi.
“We supply an economical analogue computer with permanent wiring for the automatic computation of parameters if immediate interest to the physician (MVBTPS, VO2STPD, VCO2STPD, RQ, respiratory equivalent RE, VO2/PR, f, caloric production). This computer which may be acquired in three stages processes all data provided by the S and G assemblies according to the exact formulae reduced to the usual gas conditions and taking into account atmospheric pressures and the time-lag between sensing ventilatory activity and the determination of gas exchange values.
Data output by printer and/or 12 channel point plotter.”
Quinton Q-Plex I, Metabolic Cart, 1991
Found in Respiratory Care, 1991, Volume 36, No.1, page 13.
Cybermedic MetaScope, Metabolic Cart, 1990, Advertisement
Found in Respiratory Care, 1990, July Issue, page 635.
Beckman Metabolic Cart, 1986
From a 1986 doctoral thesis on the Maximal Acceptable Weight of Lift by J.E. Fernandes
Beckman Metabolic Cart, 1988
From a doctoral dissertation “The Effects of Rigid Container Height and Shape on Maximum Acceptable Weight of Lift” by Lee Thomas Olstrom, BS, MS. December 1988. Page 52.
Sensormedics 2900 Metabolic Cart, 1980’s
From a Pemed listing. A mixing-chamber metabolic cart, probably from the late 1980’s.