Mannitol is a single sugar in the body are not metabolized by the renal tubules after glomerular filtration is re-absorbed within a few have played the role of infiltration diuretic.

• 甘露醇为单糖，在体内不被代谢，经肾小球滤过后在肾小管内甚少被重吸收，起到渗透利尿作用。