From: Gaseous exchange and physiological requirements for level and grade walking, by Henry Monmouth Smith , 1922, page 22.
Tag Archives: Benedict
Spirometer, Exercise Testing system, 1922
Benedict’s Universal Respiration Apparatus, 1916
From: The respiratory exchange of animals and man, by August Krogh, 1916, page 42.
“The apparatus of Benedict (fig. 16) [1909, 1912] is arranged to measure both carbon dioxide and oxygen, and the recording spirometer has an attachment (a “work adder”) which automatically adds the excursions together and so records the rate of ventilation. The instrument has no valves, but a rapid circulation of air is maintained by the blower. This is necessitated by the great resistance of the water-vapour absorbers. If this resistance were avoided the apparatus could be simplified considerably.”
Spirometer, Benedict, 1942, Portable
From a powerpoint presentation entitled “A la decouverte … du souffle” by Jean-Francois Dessanges. The title translates approximately as “the discovery was breathless”. This spirometer is from a G. Boulitte, Paris catalog dated 1942. It’s portable because it folds and it only weighs 25 kilograms (55 pounds).
Spirometer, Benedict, 1942
From a powerpoint presentation entitled “A la decouverte … du souffle” by Jean-Francois Dessanges. The title translates approximately as “the discovery was breathless”. This spirometer is from a G. Boulitte, Paris catalog dated 1942.