Sistema FMUSP-HC: Faculdade de Medicina da Universidade de São Paulo (FMUSP) e Hospital das Clínicas da FMUSPSANTOS, Maria MercesTANNURI, Ana Cristina AounLACERDA, Adriana VasconcelosGONCALVES, Josiane de OliveiraRICARDI, Luiz Roberto SchlaichTANNURI, Uenis2022-10-262022-10-262022ACTA CIRURGICA BRASILEIRA, v.37, n.6, article ID e370604, 7p, 20220102-8650https://observatorio.fm.usp.br/handle/OPI/49314Purpose: To evaluate the caliber of an arterial micro-anastomosis in the young growing animal using a continuous suture technique. Additionally, late morphological changes and blood flows distal to the anastomosis were evaluated. Methods: Seventy-four Wistar rats were submitted to laparotomy to access the aorta for blood flow measurement. The aorta was sectioned using microsurgery technique and an end-to-end anastomosis with continuous suture. After a period of six months to one year, the anastomosis was checked. Results: Regarding the size of the aortas, comparing the pre- and postoperative values, there was an increase of 13.33% in adult animals and 25% in young animals, without any difference in the blood flows. Conclusion: The arteries of young rats show signs of growth at the site of the anastomosis performed with continuous suture.engopenAccessMicrocirculationAnastomosisSurgicalMicrosurgeryBlood Flow VelocityModelsAnimalpediatric liver-transplantationsuturethrombosispigsarticleCopyright ACTA CIRURGICA BRASILEIRA10.1590/acb370604Surgery1678-2674