Heparin infusion to lose closure at the end of the infusion tube method directly in liquid in the infusion, the infusion controller to the big, liquid into 3 ~ 4 ml, for 60 s [1]. In the process of liquid level continues to fall, both hands should be extended to the rear of the indwelling needle tube after two folding clip into the closed clamp, the extension of extruding needles on one side of the tube should be avoided at the same time, reduce the chance of regurgitation (backflow of blood), finally pulling head skin needle.

　　Infusion extrusion tube sealing method that is at the end of the infusion, the infusion of the regulator to maximum, will Pierce heparin cap in the infusion scalp needle to pull out two-thirds, and then fixed needle handle, ready to pull out the needle, the other will infusion mau thin dropper upper impreaaion nip, and extrusion mau thin dropper, make the liquid quickly into the blood vessels of the bottom of alum thin dropper about 3 ~ 5 ml, extend the iv tube on the small clip near the interface end Y clip, and then pull out the scalp needle.

　　Heparin syringe direct seal tube method when the infusion is finished, close the infusion of regulator, separate the needles and heparin cap, disinfection heparin cap, with smoke tube sealing fluid within the syringe to Pierce the heparin cap directly to slowly push note 5 ~ 8 ml tube sealing fluid, and then quickly stop pushing 2 ~ 3 ml 1 s, 2 ~ 3 times repeatedly, finally pushed residue while cant refund needles to heparin cap, another note 1 ~ 2 ml of liquid seal tube, make it full of the lumen and heparin cap cavity, and then extend the iv tube on the small clip near the interface end Y clip, pull the needle.

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