增强CT高压注射器附加连接管回血影响因素研究

Study on influencing factors of connecting tube on high pressure injector in enhanced CT on blood return

目的研究增强CT高压注射器附加30 cm连接管是否能避免血液回流至螺旋导管及其影响因素。方法收集937份增强CT检查完成后的30 cm连接管,对连接管内液体进行红细胞镜检,判别血液是否回流至螺旋导管。收集检查类型、注射器类型、留置针型号及患者年龄、身高、体质量、收缩压、舒张压、心率、造影剂注射总量、造影剂注射速率的数据,进行Logistic回归分析,探究造成血液回流的影响因素。结果前段连接管(近患者端15 cm)有50份(5.34%)回血阳性样本,后段连接管(近机器端15 cm)没有回血阳性样本;Ⅱ型注射器较Ⅰ型注射器连接管回血风险低(OR=0.393,95%CI:0.188~0.819);造影剂注射总量是保护因素(OR=0.970,95%CI:0.955~0.985);造影剂注射速率是危险因素(OR=3.380,95%CI:1.732~6.598)。结论30 cm连接管可避免血液回流至螺旋导管,其中注射器类型、造影剂注射总量、造影剂注射速率是回血的影响因素。

Objective To study whether 30 cm connecting pipe on high pressure injector in enhanced CT can avoid blood return to spiral tube and its influencing factors.Method Collect 93730 cm connecting tube after enhanced CT examination and test the red blood cell in connecting tube to see whether blood return to the spiral tube.Record the type of test,type of injector,type of indwelling needle,patients’age,height,weight,systolic and diastolic pressure,heart rate,injecting volume and speed of contrast agent to make Logistic regression analysis and study the influencing factors of blood return.Result There are 50 positive samples with blood return(5.34%)in fore part of connecting tube(15 cm near the patient)and no positive sample in end part of connecting pipe(15 cm near the machine).TypeⅡinjector has lower blood return risk of connecting pipe compare to typeⅠinjector(OR=0.393,95%CI:0.188~0.819).Injecting volume of contrast agent is a protective factor(OR=0.970,95%CI:0.955~0.985).Injecting speed of contrast agent is a risk factor(OR=3.380,95%CI:1.732~6.598).Conclusion The 30 cm connecting tube can avoid blood return to spiral tube.Type of injector,injecting volume and speed of contrast agent are influencing factors of blood return.