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Time required for the carbon dioxide elimination from residual volume (RV) to the environment.
Author(s) -
Rueda Luis A.,
Cruz Julio C. C,
Caucha Luis J.
Publication year - 2010
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.24.1_supplement.1063.6
Subject(s) - carbon dioxide , zoology , steady state (chemistry) , residual , residual volume , mathematics , anesthesia , chemistry , medicine , biology , lung volumes , organic chemistry , algorithm , lung
After performing apneas at FRC during different times (5s to 45s), the subjects breathed irregularly until they recovered the steady state. The aim of this study was to estimate the time of CO 2 mass movement from RV to the environment. To achieve it, the mass of CO 2 exhaled was plotted as a function of number of respirations (total of 25). Twenty subjects (10 male and 10 female) consented to this study. Capnograms were recorded at steady state (controls) and during the recovery of 5s and 45s of apnea (see Figure, only 10 breaths). The control of CO 2 mass was 0.016 L ± 0.011 (SD), values shown in the graph as horizontal lines. After holding the breath, the mass of CO 2 expired decayed exponentially with the number of respirations. In conclusion, after 5s and 45s breath‐hold, subjects required, on average, two and six breaths (or 7s and 19s, respectively), to reach a new steady‐state.Supported in part by ONG – Centro de Enseñanza Investigación y Servicios