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Effect of Sampling Time after Death on Osmolality and Sodium and Chloride Concentrations of Bovine Aqueous Humor¹

Storrs (Conn.) Agricultural Experiment Station, Storrs

ABSTRACT

The possible effects of vitamin A deficiency on some of the inorganic constituents and osmolality of aqueous humor (AH) removed after death from the eyes of male Holstein calves are controversial. In one experiment (2), osmolality and sodium and chloride concentrations in AH of the deficient calves were affected, but in another (3) no effect was observed. It was noted, in re-examining the statistics of these studies, that the average osmolality was considerably greater for the first experiment (2) than for the second (3), 307 versus 290 milliosmols per kilogram of water. In a subsequent study (4) dealing with hypervitaminotic-A calves, an average osmolality of 290 was observed, which agreed with the value of the second study.

Upon searching for possible differences in the conduct of these experiments, it was found that in the initial study (2) less attention was paid to removing the AH as soon as possible after death than in the subsequent ones (3, 4).

¹ Scientific contribution No. 77, Agricultural Experiment Station, University of Connecticut, Storrs. This study was supported in part by grant-in-aid funds provided by PHS research grant, NB-0210803, from the National Institute of Neurological Diseases and Blindness, Public Health Service.