Medical devices, namely, anesthesia machines, medical respirators, medical ventilators, lung ventilators, anesthesia ventilators, purification units for purifying air or gas that patients receive through respiratory devices, breathing air compressors, oxygen booster pumps, humidification apparatus for humidifying breathing air, and vaporizers; medical instruments, namely, patient monitors for critical care, anesthesia, and ventilating, breathing filters, heat and moisture exchangers; pressure reducers as parts of medical devices in the nature of medical, lung, and anesthesia ventilators, anesthesia machines, respirators, breathing air compressors, oxygen booster pumps, humidification apparatus for humidifying breathing air, and vaporizers; pressure reducers as parts of anesthesia devices in the nature of anesthesia masks, oxygen masks; pressure reducers as parts of medical ventilators; pressure reducer devices for medical purposes, namely, pressure reducers for relieving oxygen/air pressure before reaching a patient, which devices are affixed to a healthcare facility wall near a patient's bed