Atrion Corporation, together with its subsidiaries, develops and manufactures fluid delivery devices, and ophthalmic and cardiovascular products primarily for medical applications in the United States, Canada, and internationally. The company's fluid delivery products comprise luer syringe check valves and one-way valves; tubing clamps; and specialized intravenous sets for use in anesthesia and oncology applications. Its cardiovascular products include MPS2 Myocardial Protection System that delivers essential fluids and medications to the heart during open-heart surgery; cardiac surgery vacuum relief valves; silicone vessel loops for retracting and occluding vessels in minimally invasive surgical procedures; and inflation devices for balloon catheter dilation, stent deployment, and fluid dispensing, as well as products used in heart bypass surgery to make a precision opening in the heart for attachment of the bypass vessels. The company's ophthalmic products comprise contact lens disinfection cases; and a line of balloon catheters used in the treatment of nasolacrimal duct obstruction in children and adults. It also manufactures inflation systems and valves used in marine and aviation safety products; one-way and two-way pressure relief valves for use on electronics cases, munitions cases, pressure vessels, transportation container cases, escape slides, and other medical and non-medical applications; instrumentation and associated disposables used to measure the activated clotting time of blood; and a line of products designed for safe needle and scalpel blade containment. Atrion Corporation sells its products to physicians, hospitals, clinics, and other treatment centers, as well as other equipment manufacturers through direct sales personnel, independent sales representatives, and distributors. The company was founded in 1944 and is headquartered in Allen, Texas.