| Autor: |
Furne, J., Majerus, G., Lenton, P., Springfield, J., Levitt, D. G., Levitt, M. D. |
| Předmět: |
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| Zdroj: |
Journal of Dental Research; Feb2002, Vol. 81 Issue 2, p140-143, 4p, 1 Chart, 3 Graphs |
| Abstrakt: |
The accuracy of the Halimeter®, an inexpensive, simple instrument that measures total breath volatile sulfur compounds (VSCs), has not been adequately tested. We compared Halimeter® measurements with those obtained with a specific and sensitive gas chromatographic (GC) technique. The Halimeter® gave different, biexponential responses to a constant concentration of different VSCs: The relative response rate and sensitivity were hydrogen sulfide > methyl mercaptan > dimethylsulfide. The transient peak VSC concentration of oral samples was reached long before the sulfide detector fully responded. The GC measurement of initial total VSCs in breath samples was 2.7 ± 0.48 times greater than the peak concentration of the Halimeter®. However, the plateau phase measurement of the Halimeter® was 25% greater than that of GC. While GC and Halimeter® measurements positively correlated, appreciable differences were observed. In studies where relatively precise VSC measurements are required, GC is the preferable technique [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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