Weisz D, Hamby R I, Aintablian A, Voleti C, Fogel R, Wisoff B G
Ann Thorac Surg. 1979 Nov;28(5):429-35. doi: 10.1016/s0003-4975(10)63150-5.
Quantitative assessment of the flow in 45 saphenous vein aortocoronary bypass grafts in 30 patients was performed by a roentgendensitometric technique. Detalis of the technique are given. Mean graft flow for all grafts measured in the early postoperative period (two weeks) and again in the late postoperative period (six months to 3 years; average, 1.5 years) significantly decreased (72.6 +/- 34.7 to 57.4 +/- 28.6 ml/min; p less than 0.01). Mean graft diameter also significantly decreased over the same period (3.5 +/- 0.6 to 3.0 +/- 0.6 mm; p less than 0.01). Differences could not be related to graft site or to the time interval between early and late recatheterization. Changes in diameter did not correlate with changes in flow. During a 3-year follow-up, saphenous vein grafts significantly decreased in diameter and flow but still functioned adequately; and vein grafts generally remained larger than the recipient arteries. The determinant of adequacy of flow is the native coronary bed.
采用X线密度测定技术对30例患者的45条大隐静脉主动脉冠状动脉旁路移植血管的血流进行了定量评估。文中给出了该技术的详细信息。在术后早期（两周）及术后晚期（六个月至3年；平均1.5年）测量的所有移植血管的平均移植血管血流量显著下降（从72.6±34.7降至57.4±28.6 ml/min；p<0.01）。在同一时期，平均移植血管直径也显著减小（从3.5±0.6降至3.0±0.6 mm；p<0.01）。差异与移植血管部位或早期和晚期再次插管之间的时间间隔无关。直径变化与血流变化不相关。在3年的随访期间，大隐静脉移植血管的直径和血流显著减小，但仍功能良好；而且静脉移植血管通常仍大于受体动脉。血流充足的决定因素是自身冠状动脉床。
