Medical oxygen and accessories deliver medical-grade oxygen to treat people in respiratory distress. Medical oxygen and cylinders supply high-purity, medical-grade oxygen for treating breathing difficulties and low oxygen levels (hypoxia). Medical oxygen tubing, adapters, and regulators manage the flow of oxygen from cylinders. Medical oxygen face masks and bags fit over the nose and mouth to deliver oxygen or aerosol medications. Nasal cannulas insert into the nostrils to deliver oxygen for treatments that don't require the higher concentrations supplied by masks. Medical oxygen kits and storage keep oxygen cylinders and supplies organized and ready for use. Ventilator test lungs simulate the function of human lungs to check for proper operation of medical ventilators before use on patients.