1040 
ANIMAL RESOURCES 
PO2 mmHg±S.E. 
180- 
120- 
80- 
40- 
— ARTERIAL 
— VENOUS 
I I 
5 15 30 60 90 
MINUTES 
Figure 4. — PO2 values in calves perfused with bubble 
oxygenator. 
PCO2 mmHg±S.E. 
— ARTERIAL 
— VENOUS 
60-1 
50 
40- 
30- 
20-4 
5 15 30 60 
MINUTES 
90 
Figure 5. — PCO2 values in calves perfused with bubble 
oxygenators. 
these studies in which the disc speed was 
115-120 rpm with oxygen flows of 15 liters per 
minute. 
Figures 4, 5 and 6 depict the mean blood gas 
and pH values observed in a series of 18 calves 
having a mean body weight ± S.E. of 113.4 ± 
1.7 kg perfused with bubble oxygenators at a 
mean perfusion flow ±: S.E. of 4.78 ± 0.19 
liters/min. In this series of studies the oxygen 
flow to blood flow ratio was generally 2:1. Note 
that blood gases and pH were within acceptable 
limits. The Travenol bubble oxygenators were 
capable of transferring 300 to 350 ml/min of 
oxygen during these perfusions. Even greater 
oxygen transfer could be obtained by specially 
extending by 6 inches the venous oxygenating 
column of Travenol bubble oxygenators, 
thereby increasing transit time of blood 
through thusly modified columns. 
Figure 7 illustrates the mean blood gas and 
pH ±S.E. 
7.5 
7.4- 
7.3- 
7.2 
ARTERIAL 
VENOUS 
5 15 30 60 
MINUTES 
90 
Figure 6.— pH values in calves perfused with bubble I 
oxygenators. 
