Bazylev V V, Rosseĭkin E V, Mikuliak A I, Karpun'kin O A
Angiol Sosud Khir. 2014;20(1):45-50.
According to the findings of many authors, occlusion of bypass grafts may develop as early as during surgery in 4-12% of patients. At discharge from hospital this index may reach 5-20%, increasing to 30% within the first year. Incompetence of bypass grafts is in many cases a consequence of errors in surgical technique and may therefore be decreased by means of improving the control over quality of coronary bypass grafting. Using the method of ultrasound Doppler flowmetry in the conditions of artificial circulation and clamped artery, we assessed a total of 64 composite bypass grafts. Blood flow was assessed by such parameters as the pulsatility index (PI), mean volumetric blood flow velocity (Qmean), and percentage of diastolic volumetric filling (DF). The obtained results were statistically processed. The mean values of blood flow parameters were obtained, followed by determining dependence between peripheral resistance (PI) prior to removal of the clamp from the aorta and peripheral resistance (PI) measured after termination of extracorporeal circulation.
根据许多作者的研究结果，旁路移植血管闭塞可能早在手术期间就会在4%至12%的患者中出现。在出院时，这一指标可能达到5%至20%，在第一年内增至30%。旁路移植血管功能不全在很多情况下是手术技术失误的结果，因此可通过加强对冠状动脉旁路移植术质量的控制来降低。在人工循环和动脉夹闭的条件下，我们使用超声多普勒血流仪方法，共评估了64条复合旁路移植血管。通过诸如搏动指数（PI）、平均容积血流速度（Qmean）和舒张期容积充盈百分比（DF）等参数评估血流。对获得的结果进行了统计学处理。得出了血流参数的平均值，随后确定了从主动脉移除动脉夹之前的外周阻力（PI）与体外循环结束后测量的外周阻力（PI）之间的相关性。
