血浆渗透压是由晶体和胶体渗透压组成。晶体渗透压的变化,能迅速引起细胞内外体液平衡紊乱。多种原因可以导致低渗血症(血浆渗透压<280mosm/L),如呕吐、腹泻、肺心病、肝硬化、脑炎等,若不及时发现与纠正,往往可造成误诊误治甚或危及生命。现报道1例在重度乐果中毒抢救过程中发生的重 Plasma osmotic pressure is composed of crystal and colloid osmotic pressure. Crystal changes in osmotic pressure, can rapidly cause imbalance of fluid balance inside and outside the cell. A variety of causes can lead to hypoglycaemia (plasma osmolality <280 mosm / L) such as vomiting, diarrhea, cor pulmonale, cirrhosis, encephalitis, etc. Failure to detect and correct in time can often result in misdiagnosis or life-threatening . It is reported in 1 case of severe dimethoate poisoning occurred in the process of weight