Experimental studies on the alteration of NPN (non-protein nitrogen) with cold / 日本温泉気候物理医学会雑誌

ABSTRACT

Experiments to determine the relationship between the exposure time following death from cold and the amount of residual NPN in blood and organs.<br>Sixty rabbits weighing about 2500 grams were used in these experiments. Their whole bodies except the head and face were immersed in water at a temperature of 2 to 10°C and fastened by tight binding. Their rectal temperatures were measured five minutes apart using a thermocouple thermometer. The measured amount of residual NPN in tissues and blood with each experiment group by the Kjeldahl method after the death are as follows<br>1) The amount of residual NPN in organs and blood differed depnding on aggressiveness and the length of time until death.<br>2) When the length of time until death was relatively short, the amount of NPN in organs decreased and that in blood increased.<br>3) When the length of time until death was relatively long, the amount of NPN inorgans increased extremely and that in blood also increased.<br>4) The amount of residual NPN in organs and blood starts to change at the initial stage of aggression.