[
Abstract]
[
Full Text PDF] （in Japanese / 2112KB）
[Members Only And Two Factor Auth.] J.Jpn. Surg. Soc.. 92(6): 722-726, 1991
Original article
BLOOD FLOW ANALYSIS OF AORTO-CORONARY BYPASS GRAFT USING A DOPPLER CATHETER
―WITH SPECIAL REFERENCE TO COMPARISON OF SVG WITH IMAG―
Since June to December, 1988, 46 patients had aorto-coronary bypass grafting (CABG) to the left anterior descending artery. Fifteen patients among them were subjected to this study. In 8 cases the internal mammary artery (IMAG group) was used and in 7 cases the saphenous vein graft was chosen as a bypass material (SVG group). Mean peripherary anastomostic portion was 2.3±0.5 places for each group. Within two months after operation, intra-graft flow velocity was measured using a Doppler catheter. Mean cross sectional areas of the graft were 13.3±8.4mm
2 in the SVG group and 6.0±1.2mm
2 in the IMAG group. Peak How velocity in diastole in SVG group and IMAG group were 9,9±2.7cm/sec and 15.9±8.9cm/sec, respectively (p＜0.05). Also flow velocity in SVG (6.7±1.8cm/sec) was significantly (p＜0.05) lower than that in IMAG (12,1±6.4cm/sec) in systole. There were no significant differences in peak, mean and integrated D/S ratio between SVG and IMAG as follows, peak D/S ratio : 1.6±0.3 in SVG, 1.4±0.4 in IMAG, mean D/S ratio : 1.5±0.3 in SVG, 1.4±0.4 in IMAG, integrated D/S ratio : 2.0±0.4 in SVG, 2.7±0.9 in IMAG. It is concluded that no significant differences were demonstrated between SVG and IMAG as to the intra-graft flow velocity profile at least in 2 months after operation.
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