摘要
Objective: To explore the alleviation of arterial intimal hyperplasia and improvement of outflow by inserting an autogenous vein cuff between poly tetraflu oroethylene (PTFE) graft and arteri al an astomosis. Methods: Twenty-four hindlimbs of 12 mongrel dogs were randomly divided into control group and experimental group. Sole PTFE bypasses were made in the control group, an autologous vein cuff was inserted in the distal anastomosis in the experimental group. Eight weeks after operation, angiography was made and specimens were harvested, histomorphological studies under microscope and picture analysis with computer were carried out, scanning electromicroscopy on the vein cuff was made. Results: Angiography demonstrated the patency of control and experimental group was 16. 7% and 66. 7%, respectively; Computer gave the intimal thickness: (483. 5 ± 67. 3) μm and (147. 4 ± 38. 6) μm, respectively; no obvious change was seen in medial thickness; area of intimal hyperplasia was (5217 ± 1 123) (pixel) and (31 17 ± 890) (pixel), respectively, accounting (80. 9 ± 17. 2)% and (47. 7 ± 13. 7)% of the sectional area of vessel lumen. The interpositional vein was arteriolization. Conclusion: The interpositional autologous vein cuff can obviously mitigate the arterial intimal hyperplasia after PTFE bypasses, improving postoperative patency of vascular surgery.
Objective: To explore the alleviation of arterial intimal hyperplasia and improvement of outflow by inserting an autogenous vein cuff between poly tetraflu oroethylene (PTFE) graft and arteri al an astomosis. Methods: Twenty-four hindlimbs of 12 mongrel dogs were randomly divided into control group and experimental group. Sole PTFE bypasses were made in the control group, an autologous vein cuff was inserted in the distal anastomosis in the experimental group. Eight weeks after operation, angiography was made and specimens were harvested, histomorphological studies under microscope and picture analysis with computer were carried out, scanning electromicroscopy on the vein cuff was made. Results: Angiography demonstrated the patency of control and experimental group was 16. 7% and 66. 7%, respectively; Computer gave the intimal thickness: (483. 5 ± 67. 3) μm and (147. 4 ± 38. 6) μm, respectively; no obvious change was seen in medial thickness; area of intimal hyperplasia was (5217 ± 1 123) (pixel) and (31 17 ± 890) (pixel), respectively, accounting (80. 9 ± 17. 2)% and (47. 7 ± 13. 7)% of the sectional area of vessel lumen. The interpositional vein was arteriolization. Conclusion: The interpositional autologous vein cuff can obviously mitigate the arterial intimal hyperplasia after PTFE bypasses, improving postoperative patency of vascular surgery.
