Atrion Corp. engages in the manufacture and development of products for medical applications. Its products include cardiac surgery vacuum relief valves, silicone vessel loops, inflation devices, stent deployment, fluid dispensing and products used in heart bypass surgery. Read More The company involves in the fluid delivery as well as ophthalmic and cardiovascular devices. It offers pressure relief valves and inflation systems to the aviation and marine industries. Atrion was founded in 1944 and is headquartered in Allen, TX.