Abstract
Although animals housed for research purposes are strictly monitored for lighting, temperature, and humidity, the acoustic environment receives less attention. In a retrospective study, we investigated the effect of construction-induced noise on coagulation using thromboelastography in a group of healthy control rats. Animals were unintentionally exposed to noise due to construction in the vicinity of the animal care facility where these rats were housed. We compared the results to those of age-, gender-matched nonexposed rats. There was a significant shortening of the reaction (R) time (P = .009) and a trend toward an increase in coagulation index (CI; P = .09), indicating hypercoagulability. The short R time and increase in CI were correlated with an elevated plasma cortisol and corticosterone, indicating that the hypercoagulability seen in these rats is stress induced. Noise is a stress factor for which animals need to be monitored, particularly if those animals are selected as controls for hemostasis studies.
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