All posts by Richard Johnston

McKesson Metabolor, Model 185, circa 1950

From the NIH Office of History Website.  Described as:

“Black enameled metal cart with single drawer which holds small accessories. Metabolor is tan enameled metal with chrome accents. Display dial on back. The left side has an oxygen fill line and knob; the front has a canister, stainless steel hose bracketed to torn black rubber hoses; gauges; and recording area with paper.”

Sanborn Metabolator, circa 1950, Top Panel View

From The Doctors of BC Medical Museum website.   Described as:

“A Sanborn Metabulator, model 10, serial number 1845, volts 115, cycles 60, amps 0.5 with an inbuilt recording compartment with paper roll to print paper chart, a barometer and thermometer dial, a carbon dioxide absorption chamber filled with soda lime granules and an oxygen gas cylinder B.P. Oxygen. The metabulator is on casters making it easily portable, with a protective hood cover. A right-hand side door opens to reveal the oxygen tank and a storage area which contains a scoop tool, a jar holder and a lever tool. An engraved metal plaque attached to the metabulator reads MADE FOR S. KATHLEEN GRAHAM M.D. BY SANBORN COMPANY CAMBRIDGE. MASS. U.S.A.”

Sanborn Metabulator, circa 1950

Found on the Skinner Auction website.  Described as:

Mahogany Cased Metabulator by Sanborn Company, Cambridge, Massachusetts, circa 1950, recording compartment with paper roll, barometer and thermometer dial, carbon dioxide absorption chamber and oxygen tank, metal plaque stating Made for George Danis, MD by Sanborn Company, Cambridge, Mass., USA, all in a mahogany cabinet with draw on wheels and instruction manual, ht. 41 in. “

Valve, Armstrong-Mohler, 1969, Diagram

From Journal of Applied Physiology, 1969 27(5): page 765.

“O2 deficit and debt.  A collection bag is connect to each outlet (A, B, C, D).  Initially when the valve is in the position shown, exhaled gas flows from the mouthpiece and into the bag on the outlet which is in position A.  When this collection period ends the outer rim is rotated so that outlet A is in position B, and an empty bag is in position A. When the next collection period begins a third empty bag is in position A, the second collection bag is in position B and the first bag is in position C and ready for sampling. When the fourth collection period begins the above sequence is repeated, and the first bag is rotated into position D and emptied into the Tissot. The first bag is ready to be refilled when turned to position A at the beginning of the 5th gas collection.