Partial pressure of oxygen in arterial blood

Figure 9.15. In vivo partial pressure of oxygen in arterial blood of dogs over the period of 10 h. The solid lines represent the analyses monitor by the instrument. Two different polymer solutions are shown. The dots represent the batch gas analysis measured with a Nova Biomedical blood gas analyzer. (From Ref. 21 with permission.)...

The symbols used throughout the text are consistent with the recommendations of the Pappenheimer Committee [Federation Proc. 0, 602-605 (1950)]. Pio, should be read as the inspired partial pressure of oxygen. Pb should be read as the barometric pressure. P should be read as the partial pressure of oxygen in arterial blood. Paoj should be read as the partial pressure of oxygen in the alveoli. 

Abbreviations-. FEVl, forced expiratory volume in 1 second Pa02, partial pressure of oxygen in arterial blood Sa02, saturation of oxygen in arterial blood. 

If the patient anesthetized with halothane is allowed to breathe spontaneously, an increased partial pressure of carbon dioxide in the arterial blood is common and is indicative of ventilatory depression. There also is an increased difference between the partial pressure of oxygen in the alveolar gas and in the arterial blood, indicating less efficient exchange of gas. Halothane thus influences both ventilatory control and the efficiency of oxygen transfer. To compensate for these effects, ventilation frequently is assisted or controlled by manual or mechanical means, and the concentration of inspired oxygen is increased. 

Cardiopulmonary parameters and rectal body temperature are determined while the rabbit is in the sling and also at 15 min intervals following induction of anesthesia with the rabbit in lateral recumbency. Heart rate, mean arterial blood pressure, respiratory rate and respiratory pattern are calculated from tracings from the physiological recorder. Arterial blood pH, partial pressure of oxygen (PaQz), and partial pressure of... 

Pa02 Partial pressure of oxygen present in arterial blood normal level for adults is 80-100 mm Hg normal level... 

After it was determined that changing the linear velocity of the maternal or fetal blood stream did not affect the equilibration pressure, it was possible to determine the maternal to fetal volumetric flow rate ratio that would result in an equilibration pressure which matched experimentally determined values of umbilical vein and artery oxygen partial pressures (37). As the maternal to fetal volumetric flow rate ratio is increased, the partial pressure of oxygen at which equilibration... 

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