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目的探讨冠状动脉造影术前超声测量患者主动脉根部内径对术中X线曝光时间、曝光剂量及造影剂用量的影响。方法行冠状动脉造影术患者498例,随机分为观察组261例和对照组237例,观察组冠状动脉造影术前行超声检查,测量主动脉窦内径和升主动脉内径,计算主动脉管壁距对侧冠状动脉间的距离,并根据其结果选择合适造影导管;对照组直接选择5F多功能造影导管。比较2组X线曝光时间、曝光剂量、造影剂用量及更换导管次数。结果观察组X线曝光时间((15.7±6.3)min)、曝光剂量((4 132.7±29.4)mGy)、造影剂用量((80.2±19.5)mL)、更换导管次数(19次)均低于对照组((23.5±4.8)min、(7 365.3±37.9)mGy、(130.1±17.7)mL、56次),2组比较差异有统计学意义(P<0.05)。结论冠状动脉造影术前超声测量患者主动脉根部内径,有助于冠状动脉造影导管的准确选择,减少更换导管次数,缩短X线曝光时间,减少X线辐射量及造影剂用量。
Objective To investigate the effect of aortic root diameter on the intraoperative X-ray exposure time, exposure dose and contrast medium dosage before coronary angiography. Methods 498 patients undergoing coronary angiography were randomly divided into observation group (261 cases) and control group (237 cases). The observation group underwent coronary angiography before ultrasound examination, the diameter of the aortic sinus and the diameter of the ascending aorta were measured, and the aortic wall From the distance between the contralateral coronary artery, and according to the results of the selection of appropriate contrast catheter; control group directly select 5F multi-function imaging catheter. Compare the two groups X-ray exposure time, exposure dose, contrast agent dosage and the number of catheter replacement. Results The X-ray exposure time (15.7 ± 6.3) min, exposure dose (4 132.7 ± 29.4 mGy), contrast medium dose (80.2 ± 19.5) mL and catheter replacement times (19 times) (23.5 ± 4.8) min, (7 365.3 ± 37.9) mGy, (130.1 ± 17.7) mL, 56 times). The difference between the two groups was statistically significant (P <0.05). Conclusion Ultrasound before coronary angiography in patients with aortic root diameter, coronary angiography help guide the accurate choice of catheter to reduce the number of catheter replacement, shorten the X-ray exposure time, reduce the amount of X-ray radiation and contrast agent dosage.