临床上许多药物对血管的刺激性较强,常常出现药液外渗及血栓性静脉炎的发生,表现为:红肿、压痛,并影响局部的血液循环、为了预防血栓性静脉炎的发生,采用小剂量肝素静脉滴注。1 材料方法 70例静脉滴注红霉素的患儿分为两组:A 组34例;B 组36例(不加肝素),将 Clinically many drugs on the vascular irritation, and often the emergence of liquid extravasation and thrombophlebitis, manifested as: swelling, tenderness and affect local blood circulation, in order to prevent the occurrence of thrombophlebitis, the use of Low-dose heparin intravenous infusion. Materials and Methods 70 cases of patients with intravenous infusion of erythromycin divided into two groups: A group of 34 patients; B group of 36 patients (without heparin), will