肝素封管是保障置入式输液港通畅的基本条件之一,使用间歇期需每月一次封管保证管道通畅,临床上通常使用0.9%氯化钠注射液冲管,随后用50~100 u·ml-1的普通肝素稀释液封管[1,2]。普通肝素的主要作用是抗血液凝固,体内、体外均有效[3],临床上对普通肝素过敏者少见,对稀释肝素过敏者更为罕见。我院发现1例稀释肝素封管液致输液 Heparin sealing tube is one of the basic conditions to ensure the patency of transfusion port. The use of intermittent need to be sealed once a month to ensure that the pipeline patency, the clinical use of 0.9% sodium chloride injection pipe, followed by 50 ~ 100 u · Ml-1 ordinary heparin dilution tube [1,2]. The main role of unfractionated heparin is anti-blood coagulation, both in vivo and in vitro [3], clinically uncommon on the common heparin allergy, diluted heparin allergy are more rare. In our hospital, 1 case of diluted heparin occlusive fluid was found