Category Archives: DLCO

Collins DS-421 Pulmonary Testing System, 1983


Performed spirometry, helium dilution lung volumes and single-breath DLCO. The Microprocessor unit keyboard “groups keys in a logically arranged manner to promote rapid familiarity and simplified keyboard entry of patient data.” It also incorporated “a row of LED’s at the right of the keyboard which illuminates each time an entry is required.  When a key is depressed, the computer answers with a short tone and responds with a longer tone whenever an incorrect entry is made.” Photo is from a sales brochure courtesy of James Sullivan, BA, RPFT, Supervisor, Pulmonary Laboratories, Memorial Sloan Kettering Cancer Center