Determination of metabolic monitor errors and precision under clinical conditions Journal Article
| Authors: | Melendez, J. A.; Veronesi, M.; Barrera, R.; Ferri, E.; Miodownik, S. |
| Article Title: | Determination of metabolic monitor errors and precision under clinical conditions |
| Abstract: | Background & Aims: Metabolic monitoring devices used in the critical care setting are subject to a range of conditions that may compromise their accuracy. We sought to investigate the error and precision of the Deltatrac metabolic monitor under these conditions. Methods: A modified version of the funnel burner, described by Miodownik et al. (8), was ventilated by a mechanical ventilator. This was used to examine the performance of the Deltatrac metabolic monitor over a wide range of inspired oxygen concentrations, minute ventilation, and positive end expiratory pressure at different levels of oxygen consumption and carbon dioxide production. Results: The Deltatrac measured VO2 with a mean error ± precision of 9.4% ± 19.5% (range, 9.3% ± 1.9%-72.6% ± 13.6%). The mean VCO2 error ± precision was 1.2% ± 3.1% (range-2.0% ± 1.2%-5.4% ± 3.1%). Error was significantly affected by oxygen concentration and minute ventilation but was largely independent of positive and expiratory pressure. Conclusions: The methodology of Miodownik et al. permits the expression of metabolic device errors over a wide range of simulated clinical conditions. © 2001 Harcourt Publishers Ltd. |
| Keywords: | controlled study; methodology; sensitivity and specificity; nutritional status; accuracy; reproducibility of results; oxygen; patient monitoring; intensive care; simulation; device; oxygen consumption; validation; critical care; analytical error; carbon dioxide; methanol; monitoring, physiologic; positive end expiratory pressure; lung ventilation; oxygen concentration; ventilator; humans; article; funnel burner; indirect calorimetry; metabolic monitor; calorimetry, indirect; ventilators, mechanical |
| Journal Title: | Clinical Nutrition |
| Volume: | 20 |
| Issue: | 6 |
| ISSN: | 0261-5614 |
| Publisher: | Elsevier B.V. |
| Date Published: | 2001-12-01 |
| Start Page: | 547 |
| End Page: | 551 |
| Language: | English |
| DOI: | 10.1054/clnu.2001.0473 |
| PUBMED: | 11884004 |
| PROVIDER: | scopus |
| DOI/URL: | |
| Notes: | Export Date: 21 May 2015 -- Source: Scopus |
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