Chronic catheterization for sampling venous blood from the brain of the sheep.
D000818:Animals; D001800:Blood Specimen Collection; D002404:Catheterization; D002417:Cattle; D002560:Cerebrovascular Circulation; D003392:Cranial Sinuses; D004285:Dogs; D006736:Horses; D008722:Methods; D011817:Rabbits; D012756:Sheep