Critical care medicine
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Critical care medicine · Nov 1991
Comparative StudyComparison of oxygen consumption measurements: indirect calorimetry versus the reversed Fick method.
To compare measurement of oxygen consumption (VO2) by spirometry and the reversed Fick method. ⋯ The repeatability of the spirometric method was four times better than the reversed Fick method. The latter gave a significantly lower value that probably, in part, reflects the VO2 of the lung, which is included in the spirometric method but not in the reversed Fick measurement.
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Critical care medicine · Nov 1991
Effect of vasoactive treatment on the relationship between mixed venous and regional oxygen saturation.
To evaluate the relationship between the mixed venous (SvO2), hepatic, and femoral venous oxygen saturations before and during sympathomimetic drug infusions. ⋯ The individual values of SvO2 have no predictive value concerning regional oxygen transport. The parallel increase in SvO2 and hepatic venous oxygen saturation suggests that the vasoactive treatment did not compromise splanchnic oxygenation.
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Critical care medicine · Nov 1991
Experience with phenylephrine as a component of the pharmacologic support of septic shock.
To evaluate the use of the selective alpha 1-adrenergic receptor agonist phenylephrine in the hemodynamic support of patients with septic shock. ⋯ Treatment with phenylephrine was associated with beneficial hemodynamic effects when used to maintain perfusion, while increasing DO2 and VO2 in patients with septic shock.
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Critical care medicine · Nov 1991
Perfusion of the interventricular septum during ventilation with positive end-expiratory pressure.
To determine whether regional hypoperfusion of the interventricular septum occurs during ventilation with positive end-expiratory pressure. ⋯ The decrease in cardiac output during positive end-expiratory pressure is not caused by impaired interventricular septum blood supply. The preferential perfusion of the right ventricular interventricular septum indicates increased local right ventricular interventricular septum oxygen-demand and suggests that during positive end-expiratory pressure, this part of the interventricular septum functionally dissociates from the left ventricular interventricular septum and the left ventricular free wall to support the stressed right ventricle.