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Figure 2


Fig. 2. Changes in venous PO2 (A) and O2 content (B) with time into apnea. Individual data points (see Table 2 for labels of seals) from each of the three venous compartments are indicated by color: extradural vein (EDV; red), central veins (CV; green) and pulmonary artery (PA; blue); curve fits indicating compartmental trends are shown in the same respective colors. (A) Equation, from all data pooled (black line), for exponential rate of PO2 decline: y=43.7e(–x/4.30)+15.8 (r2=0.71, N=163). (B) Equation from pooled data (black line) for linear depletion rate of O2 content: y=–2.01x+26.0 (r2=0.54, P<0.0001, N=163).





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