Objective to study the cause of difficult vascular anastomosis in arteriovenous internal fistula formation for uremia patients and various countermeasures.
目的总结尿毒症患者动静脉内瘘术中血管吻合困难的原因，评价针对不同原因所采取的对策。
2
At the tip of the villus, arterioles send out one branch to form an arteriovenousanastomosis with the vein.
微动脉在绒毛顶部与微静脉有交通支，构成动静脉吻合。
3
It was concluded that there were arteriovenousanastomosis in yak's heart.