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光量子血疗是目前治疗缺血性心脑血管疾病的有效方法之一。在治疗过程中，静脉穿刺针头内回血凝集，使针头不畅、采血受阻的现象时有发生。本文通过采取拔针重刺，观察及检测了１６例针头内回血凝集后血块形成的大小变化，结合患者在心脑血管方面的病变，运用血液流变学等方面的理论，分析及阐明了血块再回输体内可能引起的一系列危害，提出凡静脉穿刺遇有针头阻塞现象时，护士严禁采取加压推注、挤压回输器等方法，防止血栓进入体内引起栓塞。
Light quantum blood therapy is currently one of the effective methods to treat ischemic cardiovascular and cerebrovascular diseases. In the course of treatment, blood agglutination in the venipuncture needle causes the needle to be sluggish and the blood to be blocked. In this paper, the size change of blood clot formation after internal aspiration of 16 needles was observed and detected by taking acupuncturing needles. Combined with the patient’s cardiovascular and cerebrovascular diseases, the theory of hemorheology was used to analyze and clarify. A series of hazards that the blood clot can inflict in the body can be caused. It is proposed that when there is a needle obstruction phenomenon in the vein puncture, the nurse is forbidden to take pressure bolus injection, squeezing the returning device and other methods to prevent the thrombus from entering the body and causing embolism.