Transconjunctival oxygen index in healthy awake dogs
Faulkner, J.E.; Hauptman, J.G.
American Journal of Veterinary Research 50(9): 1520-1522
Transconjunctival oxygen tension (PcjO2) has been used clinically in human beings and experimentally in dogs to evaluate tissue perfusion and to estimate arterial O2 tension (PaO2); however, normal values in awake healthy dogs have not been reported. In this study, transconjunctival oxygen tension and arterial oxygen tension were measured once a week in 6 healthy conditioned dogs (15 to 28 kg) for 8 weeks. The conjunctival oxygen index (PcjO2 index = PcjO2/PaO2) was calculated. Mean PcjO2 index for all dogs was 0.47 .+-. 0.08 (.hivin.X .+-. SD). The variablity of repeated measurements on the same dog and between dogs was evaluated. A difference (P < 0.05) in PcjO2 index among dogs was evident, and although there was not a difference in the same dog over time, there was a high coefficient of variability.