[Stereoselective pharmacokinetics of tetrahydropalmatine in rats].

Aim: To investigate the stereoselective pharmacokinetic process of tetrahydropalmatine (THP) in rats.

Methods: The concentrations of tetrahydropalmatine enantiomers in rat plasma were determined by coupled achiral and chiral HPLC method. The differences in plasma concentrations and pharmacokinetic parameters between the two enantiomers were compared by paired t-test.

[Enteral nutrition in the severely head injured patients].

This study evaluated the effect of modified element diet as early nutritional support in 20 severe head-injured patients. The study group (20 cases) was fed gastrically with the element diet of dextrin as glycogen by a nasal feeding tube, and the control group (20 cases) was nutritional supported with common method. The enteral nutrition (EN) was started within 5.