An implantable hydraulic needle for sampling blood or infusion of the portal vein in calves.
D000818:Animals; D001800:Blood Specimen Collection / Q000295:instrumentation*; D002417:Cattle; D005465:Fluorocarbon Polymers; D007275:Injections, Intravenous / Q000295:instrumentation*; D011169:Portal Vein / Q000601:surgery*; D013193:Stainless Steel
D005465:Fluorocarbon Polymers; D013193:Stainless Steel