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| Content Provider | Springer Nature Link |
|---|---|
| Author | Heller, H. Schuster, K. D. |
| Copyright Year | 2000 |
| Abstract | Nitric oxide (NO) is a novel indicator gas for investigating alveolar capillary gas exchange conditions. In clinical practice, pulmonary gas uptake is determined by measuring the single-breath diffusing capacity (D L,NO). Different algorithms are employed to calculate D L,NO. To compare the accuracy of those most commonly used, we performed single-breath experiments on 12 artificially ventilated rabbits. In each animal four manoeuvres, executing breath-holds of 2, 4, 6 and 8 s, were carried out. In each case we administered 55 ml of an indicator gas mixture containing 0.05% NO. Alveolar gas was analysed by respiratory mass spectrometry. The two algorithms for calculating D L,NO based on the conventional solution of the breath-holding equation [Ogilvie et al. (1957) J Clin Invest 36:1–17 and Jones and Meade (1961) Q J Exp Physiol 46:131–143], were compared with the three-equation technique [Graham et al. (1980) IEEE Trans Biomed Eng 27:221–227] as the reference. The deviation between D L,NO calculated from the conventional methods and the reference decreased linearly with increasing duration of NO uptake (Δt). The mean deviations declined from 16.6% (Jones and Meade) or 7.7% (Ogilvie) at Δt=4 s to 5.7% (Jones and Meade) or 2.4% (Ogilvie) at Δt=10 s. The larger mean values are due to the conventional solution where three-tenths of the inflation time is subtracted from Δt. These findings qualify the common prediction that the latter method yields D L,NO values of the highest accuracy. We therefore recommend Ogilvie's procedure if the three-equation technique cannot be employed. |
| Starting Page | 313 |
| Ending Page | 316 |
| Page Count | 4 |
| File Format | |
| ISSN | 00316768 |
| Journal | Pflügers Archiv |
| Volume Number | 441 |
| Issue Number | 2-3 |
| e-ISSN | 14322013 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2000-11-03 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Physiology (medical) Clinical Biochemistry |
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