To probe into the safe and effective way of puncture of internal jugnlar vein for child through comparing the technique of puncture of internal jugular vein apposition by clavicle micro-incisura with that by met-elevation anterior pathway.

Several questions of raising the successful rate of the superficial vein puncture;

Practice and building of vein puncture training base

Objective To study the method and results in improving the vein puncture success rate.

The Investigation and Nursing of Venipuncture;

Study of Methods in Alleviate Pain of Venipuncture at Aged Patients;

Study on the two methods of venipuncture in elderly patients;