The changes of carbamide nitrogen, sugar, Na +, K + in plasma and plasma crystal osmotic pressure were observed before treatment.

METHODS Plasma colloid osmotic pressures,routine blood tests and blood pressure were measured in seven allgeric patients.

Objective To explore the effect of different dosage of mannitol on Plasma osmolarity in order to provide the basis for its reasonable use.

Effects of mannitol on plasma osmolality and clinical outcome in patients with brain injury;

Role of plasma osmolality measurement in moderate or severe craniocerebral trauma;

Objective To evaluate the changes and significance of plasma osmolality in 136 patients with moderate and severe craniocerebral trauma.

Objective : To determine the level of plasma osmotic pressure, serum sodium、Glucose and blood urea nitrogen at different time of patients of traumatic brain injury, referring to patient’s GCS age and GOS at time of finishing treatments, We investigate the correlation between patient’s age and plasma osmotic pressure.

By the level of plasma osmotic pressure,the large infarct size group were divided into 10 with hyposmolality and 8 with normal;while the small infarct size group were divided into 10 with hyposmolality and 26 with normal.