Assessment of accuracy of the Vacu-Med 17053 calibrator for ventilation, oxygen uptake (V(O(2))), and carbon dioxide production (V(CO(2)))
| Autor: | Jennifer A. Bunn, Jesse Pittsley, J. W. Yates, Scott V Baker |
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| Rok vydání: | 2011 |
| Předmět: |
Pulmonary and Respiratory Medicine
medicine.medical_specialty chemistry.chemical_element Carbon dioxide production Critical Care and Intensive Care Medicine Oxygen Oxygen Consumption Calibration Medicine Humans Syringe Monitoring Physiologic Chromatography business.industry General Medicine Carbon Dioxide Oxygen uptake Surgery chemistry Breathing Room air distribution Linear Models business Pulmonary Ventilation human activities circulatory and respiratory physiology |
| Zdroj: | Respiratory care. 56(4) |
| ISSN: | 0020-1324 |
| Popis: | BACKGROUND: Few have examined the accuracy of mechanical calibrators used to calibrate metabolic monitors. OBJECTIVE: To evaluate the Vacu-Med 17053 motorized syringe calibrator for accuracy against the accepted standard method: the Douglas bag. METHODS: We tested oxygen consumption (VO2) values of 522–3,210 mL/min. We mixed room air and calibration gases in the pumping syringes of the Vacu-Med 17053 and evacuated those gases into a Douglas bag, measured the Douglas bag volumes and concentrations, and converted to pulmonary ventilation, VO2, and carbon dioxide production (VCO2). RESULTS: The Vacu-Med 17053 calibrator overestimated VO2 by a mean 28.6 mL/min (1.3% error), underestimated VCO2 by 6.9 mL/min (−1.7% error), and underestimated pulmonary ventilation by 0.98 L/min (−1.4% error). The VO2 and VCO2 differences between the calibrator and the Douglas bag were larger at higher VO2 levels. CONCLUSIONS: The VO2 and VCO2 differences might be attributable to fluctuations of the calibrator settings. The Vacu-Med 17053 calibrator was accurate with the application of a mathematical correction. |
| Databáze: | OpenAIRE |
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