血氨测定主要是测血循环中的氨浓度(以NH_4为主)。其来源主要为蛋白质在体内代谢时的脫氨作用产生了相当量的氨,不断从组织进入血液,在消化道内特别是大肠内由于微生物繁殖的结果也产生大量的氨。此外,肾脏本身也是氨的内生因素。血液自门静脉入肝,其中的氨在肝内大将被综合为尿素,使机体免受氨的毒素作用,因此 Determination of blood ammonia is mainly measured in the circulating blood ammonia concentration (mainly NH_4). The main source for the protein metabolism in vivo deamination produced a considerable amount of ammonia, continue to enter the blood from the tissue, in the digestive tract, especially the large intestine as a result of microbial growth also produces large amounts of ammonia. In addition, the kidney itself is also an endogenous factor of ammonia. Blood from the portal vein into the liver, which ammonia in the liver will be integrated into urea, the body from ammonia toxins, so