The VMax229 could be used as a metabolic measurement cart (VO2, VCO2, Ve etc) or as a standard pulmonary function testing system (spirometry, N2 washout lung volumes and DLCO). From http://www.ebay.com/itm/SENSORMEDICS-VMAX-229-SPIROMETER-PULMONARY-RESPIRATORY-ANALYZER-769200-101-/290931490837
PFT System, Sensormedics VMax229, circa 2000, Back
The VMax229 could be used as a metabolic measurement cart (VO2, VCO2, Ve etc) or as a standard pulmonary function testing system (spirometry, N2 washout lung volumes and DLCO). From http://www.ebay.com/itm/SENSORMEDICS-VMAX-229-SPIROMETER-PULMONARY-RESPIRATORY-ANALYZER-769200-101-/290931490837
Spirometer, Spirotech S700, circa 1990’s
Model S700. A horizontal, dry, rolling-seal volume displacement spirometer. Manufactured by Graseby-Andersen which marketed it under the brand name Spirotech. From http://www.sensagent.com/ebay/search-item.jsp?iId=350801506121&sId=-1&dl=en
Spirometer, Spirotech S400, circa 1990’s, side view
Model S400. A horizontal, dry, rolling-seal volume displacement spirometer. Manufactured by Graseby-Andersen which later marketed it under the brand name Spirotech. From http://www.sensagent.com/ebay/search-item.jsp?iId=151089920087&sId=-1&dl=en
Spirometer, Spirotech S400, circa 1990’s
Model S400. A horizontal, dry, rolling-seal volume displacement spirometer. Manufactured by Graseby-Andersen which later marketed it under the brand name Spirotech. From http://www.sensagent.com/ebay/search-item.jsp?iId=151089920087&sId=-1&dl=en
Spirometer, Jagielski, 1879
From The London Medical Record, July 15, 1879, page 293. “Dr. Jagielski’s Spirometer. This instrument is made by Messrs. Mayer and Meltzer, surgical instrument makers, 71 Great Portland St. W., and combines all the advantages of correctness, convenient size, simple management and neat appearance. It is cased in Morocco leather with a leather handle at the top, so that the instrument can easily be carried about. The height is 9 inches; width 5 inches; depth 6-3/4; its weight 5 pounds, 14 ounces. The instrument has three horizontal compartments, one above the other. The lowest compartment is open to view having two glass windows, and is divided by a vertical partition, on either side of which there is a round diaphragm, containing a space of 10 cubic inches each when expanded or filled; these two chambers can be seen working alternately during expiration and inspiration, the one contracting when the other expands. The middle horizontal compartment containing the valve apparatus communicating the movements from the lower compartment to the indicating apparatus above. This latter, or recording apparatus, has a visible dial, for which a cut is left open in the movable cover; around the dial there is an open space large enough to hold the elastic breathing tube.”
“This spirometer gives the vital capacity for inspiration as well as expiration, the amount of which may be read on the dial on which there are two hands to be seen in rotation when used. The large one indicates every single cubic inch in inspiration when moving from the left to the right, and, in expiration from right to left; once around it records 100 single cubic inches. The small handle on the small dial from 100 to 150, 200, 300 cubic inches on one rotation, and moves in an opposite direction to that of the large handle. In blowing into the tube it must be done with but a moderate strength, so that the large hand may move on slowly and steadily; that the observer may be able to follow its movements on the register.”
“These instruments, used for several years, show no difference in their accurate registration from the first day of use, and do not require any particular care when put away. Price six guineas each.”
Spirometer, Rattray, 1882
From Lancet, Dec 28 1872, page 915. A combined spirometer, aspiratory and aeroscope”, Alexander Rattray, MD. “For stability and economy of space the cylinders are square; the inner of the thinnest – i.e. lightest – sheet zinc, 6 x 6 in. wide, 13 in. high and accurately counterpoised by weights of lead covered by brass or copper, hanging by 24 in. long silk or catgut cords over two pulley tipped 1/4 in. brass rods, 14 in. long, placed at opposite corners. The breathing tube, 1 in. in diameter and 28 in. long with an ebony or ivory mouth piece, should be attached to the center of the inner cylinder, either by a simple or screw attachment.”
Spirometer, modified Hutchinson, 1800’s
Described as a modified Hutchinson spirometer, presumably from the late 1800’s. Original source unknown. From: http://www.zeno.org/Meyers-1905/B/Atmung
Pneumograph, Marey, 1883
Etienne-Jules Marey’s device is a small diaphragm (tambour) responsive to pressure. The apparatus amplified the motion of the tambour. Respiration was then recorded on a kymograph.
From Experimental Pharmacology. A hand book. Methods for studying the physiological actions of drugs. By Ludimarr Hermann and Robert Meade Smith. Copyright 1883.
Vierordt, Expirator, 1845
Karl von Vierordt used his “expirator” to collect exhaled air and then measured volume by immersing it and seeing the volume change in water.
From http://www.timely-cost.eu/sites/default/files/ppts/tempProcSenses/talks/Wearden.pdf