Category Archives: 1960s

Valve_Collins_5_Way_Front_View_circa_1965

Valve_Collins_5_Way_Side_View_circa_1965

Collins 5-way valve.  Used for DLCO testing before automated valves had been developed.  The patient mouthpiece was attached to the opening in the center.  A rubber alveolar sample bag was attached to the small port at the bottom.  The knob on the rear side was used by the technician to step the patient through the different stages of the test. Found on an Ebay listing.