静脉套管针型号对头颈部CTA的影响  

Impact of intravenous trocar on image quality and safety in head and neck CT angiography

作　　者：王慧霞[1] 沈俊林[1] 李倩文[1] 杜祥颖[1] 李坤成[1] 

机构地区：[1]首都医科大学宣武医院放射科,北京100053

出　　处：《中国介入影像与治疗学》2013年第12期755-758,共4页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的比较采用20G、22G静脉套管针行头颈部CTA(HNCTA)的压力值和图像质量,探讨利用团注试验预测HNCTA扫描的安全性和成像效果的方法。方法将102例接受HNCTA检查患者平均分为两组,A组留置20G静脉套管针,B组留置22G静脉套管针。测定团注试验、HNCTA图像的CT值;分别记录两次扫描的压力值。比较A、B两组间HNCTA扫描的CT值和压力值;对团注试验与HNCTA扫描间的CT值和压力值行线性回归分析。结果两组HNCTA扫描CT值差异无统计学意义[A组(488.9±121.5)HU,B组(512.2±94.3)HU,P=0.281]。B组HNCTA扫描压力值[(233.2±26.5)PSI]高于A组[(153.3±23.5)PSI]差异有统计学意义(P<0.001)。A组团注试验扫描与HNCTA扫描间CT值、压力值回归方程分别为Y=306.815+0.922 X、Y=100.031+0.448 X,B组分别为Y=320.853+0.804 X、Y=93.914+0.853 X。结论 HNCTA检查中,采用22G静脉套管针,图像质量可满足诊断要求。团注试验的压力值和CT值测定对保证成像效果及检查的安全性具有指导意义。Objective To compare the pressure and image quality of two types of intravenous trocar in head and neck CT angiography （HNCTA）, and to propose a method to predict image quality and pressure value of HNCTA using test bolus scan. Methods Totally 102 patients underwent HNCTA were equally divided into two groups. Patients in Group A were embedded with 20G intravenous trocar, while patients in Group B with 22G intravenous trocar. CT value was measured, and pressure was recorded from test bolus and HNCTA image, respectively. CT value and the pressure of HNCTA scan were compared between Group A and Group B. Linear regression analysis was made between test bolus scan and HNCTA scan regarding CT value and pressure, respectively. Results No statistical difference was found between Group A （[488.9± 121.5] HU） and Group B （[512.2 ± 94.3] HU） regarding CT value of HNCTA. Statistical difference was found between Group A （[153.3±23.5]PSI） and Group B （[-233.2±26.5]PSI） regarding pressure of HNCTA. The regression equation between test bolus scan and HNCTA in Group A was Y=306. 815 ± 0. 922X for CT value and Y = 100. 031 ＋ 0. 448X for pressure valre, respectively, and in Group B, it was Y= 320. 853 ＋ 0. 804X for CT value and Y： 93. 914 ＋ 0. 853X for pressure value, respectively. Conclusion Diagnostic image quality can be obtained using 22G venous trocar in HNCTA. Pressure and CT value of test bolus may have guideline value to safety and image quality of HNCTA.

关 键 词：头颈血管 体层摄影术 X线计算机 静脉套管针 

分 类 号：R814.42[医药卫生—影像医学与核医学] R816[医药卫生—放射医学]