the joining together of two small blood vessels by side-to-side elliptic anastomosis to create a single larger stoma for subsequent end-to-end anastomosis.
con·joined an·as·to·mo·sis
(kŏn-joynd ă-nas'tŏ-mō'sis) The joining together of two small blood vessels by side-to-side elliptic anastomosis to create a single larger stoma for subsequent end-to-end anastomosis.