title: Transconjunctival oxygen index in healthy awake dogs.
abstract: 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 (X +/- SD). The variability of repeated measurements on the same dog and between dogs was evaluated. A difference (P less than 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.
authors: Department of Small Animal Clinical Sciences, Michigan State University, East Lansing 48824-1314.
authors: J E
authors: JE
authors: Faulkner
authors: J G
authors: JG
authors: Hauptman
mesh_terms: D000818:Animals; D002196:Capillaries; D003228:Conjunctiva / Q000098:blood supply*; D004285:Dogs / Q000097:blood*; D010100:Oxygen / Q000097:blood*; D012016:Reference Values
chemical_list: D010100:Oxygen