Linked Life Data

10971551

Source:http://linkedlifedata.com/resource/pubmed/id/10971551

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SubjectPredicateObjectContext
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pubmed-article:10971551pubmed:abstractTextThe partial CO2 rebreathing technique has been shown to be a reliable non-invasive method for measurement of pulmonary capillary blood flow (Qc), but experience with this technique has been limited to controlled mechanical ventilation. In this study, we evaluated this technique during spontaneous and oriented ventilation in nine subjects without known cardiopulmonary disease. Subjects underwent 10 consecutive (Qc) measurements with both spontaneous and oriented ventilation. Breath-by-breath gas exchange was measured and (Qc) was calculated from changes in CO2 elimination and PETCO2, which were achieved by sudden increase of the apparatus deadspace (rebreathing period). An exponential curve was fitted to the PETCO2 values in the rebreathing period in order to estimate PETCO2 at equilibrium. We found that mean (Qc) values were not influenced by the ventilation pattern (P=0.51), but that the intra-individual variability with oriented ventilation (median=16.0%) was significantly lower than with spontaneous ventilation (median=31.8%, P=0.039). Accordingly, the curve fitting for rebreathing PETCO2 rise failed in 4.4% of measurements with oriented ventilation vs. 18.9% of measurements with spontaneous ventilation (P=0.039). Our results suggest that the performance of the partial CO2 rebreathing technique is adversely affected by spontaneous ventilation and, consequently, that this method should be reserved for patients with regular respiratory patterns.lld:pubmed
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pubmed-article:10971551pubmed:pagination388-98lld:pubmed
pubmed-article:10971551pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:10971551pubmed:articleTitlePulmonary capillary blood flow by partial CO2 rebreathing: importance of the regularity of the respiratory pattern.lld:pubmed
pubmed-article:10971551pubmed:affiliationClinic of Anesthesiology and Intensive Care Medicine, University Clinic Carl Gustav Carus, Technical University Dresden, Dresden, Germany.lld:pubmed
pubmed-article:10971551pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10971551pubmed:publicationTypeClinical Triallld:pubmed
pubmed-article:10971551pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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