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In vitro evaluation of a compact metabolic measurement instrument
Author(s) -
Weissman C,
Sardar A,
Kemper M
Publication year - 1990
Publication title -
journal of parenteral and enteral nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.935
H-Index - 98
eISSN - 1941-2444
pISSN - 0148-6071
DOI - 10.1177/0148607190014002216
Subject(s) - respiratory quotient , carbon dioxide , methanol , respirator , dilution , combustion , chemistry , oxygen , analytical chemistry (journal) , biomedical engineering , materials science , chromatography , medicine , thermodynamics , biochemistry , organic chemistry , physics
The ability of the Datex Deltatrac (Sensor‐Medics, Anaheim, CA) to accurately measure oxygen consumption (VO2v) and carbon dioxide production (VCO2) was examined in vitro using the carbon dioxide addition and nitrogen dilution methods. The accuracy of respiratory quotient (RQ = VCO2/VO2) measurements was assessed using methanol combustion (RQ = 0.67). Both in the canopy (blow‐by) and respirator (FiO2: 0.21–0.6, PEEP: 0–12 cm H2O) modes the Deltatrac's measurements of VO2 and VCO2 were within +/‐ 7% of values predicted from CO2 and N2 simulations. Similar results were obtained with methanol combustion. In vitro testing revealed that the Deltatrac accurately measures VO2 and VCO2 under a variety of simulated clinical conditions.