Objective To establish a feasible evaluation index and method to identify composition of re-maining metal particles on ferrochrome kitchen knife. Methods The small samples of remaining metal particles were rubbed fromthe knives using filter paper. The composition of remaining metal particles was detected by scanning electron microscopy and energy dispersive X-ray spectrometer (SE m-EDX ) and GSR particle analysis function, using mathematical methods to calculate the ratio (relative amount) of Fe and Cr in remaining metal particles. Results The ratio (relative amount) of Fe and Cr of remain-ing metal particles had significant differences among most ferrochrome kitchen knives (P<0.05). Conclu-sion U sing GSR particle analysis function to quantitatively detect the ratio (relative amount) of Fe and Cr of remaining metal particles on ferrochrome kitchen knife, which can establish the feasible evaluation method to estimate such injury tool.

Objective To study the curative effect of continuous alternant drainage surgery on improved central venous catheter cerebellomedullary cistern and continuous alternative drainage of ventricle in treating cerebroventricular hemorrhage.Methods 118 cases of patients with cerebroventricular hemorrhage were randomly divided into two groups:the improve group(n=59)was applied with continuous alternative drainage of ventricle and improved central venous catheter cerebellomedullary cistern,and the control group(n=59)was applied with traditional drainage of ventricle combined with lumbar centesis.Results In the improved group 3 cases(5.1%)died,and 7 cases(11.9%)developped with obstructive waterhead.In control group 8 cases(13.6%)died,and 15 cases(25.4%)developped with obstructive waterhead.The cleanup speed of cerebroventricular hemorrhage for patients in the improved group was much faster than that in the control group(P＜0.01).The curative effect of the improved group was distinctly better than that of the control group(P＜0.05).Conclusion Cerebroventricular hemorrhage treated by continuous alternative drainage of ventricle and the improved central venous catheter cerebellomedullary cistern and and continuous alternative drainage of ventricle can distinctly reduce mortality,deformity,complication and sequelae.