Host: The Japanese Society of Toxicology
Name : The 47th Annual Meeting of the Japanese Society of Toxicology
Date : 2020 -
【Introduction】We compared body temperature (BT) in non-rodents between a temperature-sensing microchip (IPTT-300, BMDS) and traditional rectal thermometer (RT) or telemetry devices. We also compared the BT changes in several implantation sites to seek the optimal implantation site for microchips.
【Methods】Microchips were implanted subcutaneously at 3 sites (chest, thigh, and interscapular region) in telemetered monkeys (4 males), and at 3 sites (chest, neck, and interscapular region) in dogs (2 males and 2 females). Animals were dosed intramuscularly with medetomidine (α2 adrenergic agonist) at 0.15 mg/kg (monkeys) and 0.2 mg/kg (dogs) , and BT was measured predose and at 15 min intervals postdose until recovery using the microchips, RT, and telemetry devices (monkeys only).
【Results】All three methods recorded decreases in BTs with medetomidine. In monkeys, The interscapular microchips BTs were similar to the rectal and telemetry temperatures, and other 2 sites were lower than them. In dogs, there were no clear differences in BTs in the 3 sites, and degree of changes in BT by microchips was similar to the RT.
【Conclusion】Microchips are useful tools for BT measurement. The advantage of microchips include that there are quick and less invasive compared to a RT. The best implantation site of microchips was interscapular subcutis in both dogs and monkeys.
