Objective: To observe the time required for anastomosis and the reliability for pressure tolerance after internal mammay artery (IMA) -coronary artery anastomosis. Method: Eight sheep underwent thoracotomy and left IMA harvest. In group I (T) the IMA were anastomosed to left anterior descending artery (LAD) with 7-0 prolene suture (n=4) and in group II (LA) IMA were anastomosed to LAD with laser. Result: The time required for laser technique was shorter than that required in suturing technique [117.5?9.48min (total) and 38.25?.23 min vs 62.5?7.83 min (total) and 20?.53 min respectively ] (p<0.01). Prior to closing thoracotomy both two groups endured the impact of pharmacologic vasopressor. No leakage at the anastomosed site was observed in both groups. After the closure of thoracotomy, well tolerance for both adrenalin and thoracic negative pressure was observed in the two groups. The peak systolic pressure induced by pharmacologic agent was similar in both groups. Neither stenosis nor thrombus or embolism was observed and immediate patency rate in both groups was 100%. Conclusion: Laser assisted technique seems to be favorable for patency rate and could lead to better result after coronary artery bypass grafting（CABG）.
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机译：目的：观察吻合术所需的时间和内部Mammay动脉（IMA）后的压力耐受性的可靠性 - 可以吻合。方法：八只羊接受了胸廓切开术和留下了IMA收获。 I组（T）的IMA分别吻合左前降支（LAD）用7-0聚丙烯纺织纤维缝合线（N = 4），并在第II组（LA）IMA被吻合LAD用激光。结果：激光技术所需的时间短于缝合技术中所需的时间[117.5？9.48min（总计）和38.25〜.23 min vs 62.5？7.83 min（总计）和20？.53分钟，P <0.01 ）。在关闭胸廓切开术之前，两组两组都忍受了药理学血管加压剂的影响。在两组中观察到吻合部位不泄漏。在胸廓切开术后，在两组中观察到肾上腺素和胸腔负压的耐受性。两组中药物剂诱导的峰收缩压相似。观察到狭窄或血栓或栓塞，两组的立即通畅率为100％。结论：激光辅助技术似乎有利于通畅率，可能导致冠状动脉旁路移植（CABG）后更好的结果。
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