Photo and description are kindly provided by Dr. David Chinn, for an upcoming ARTP article.
“Image showing the bellows expanded vertically.”
Photo and description are kindly provided by Dr. David Chinn, for an upcoming ARTP article.
“Image showing the bellows expanded vertically.”
Photo and description are kindly provided by Dr. David Chinn, for an upcoming ARTP article.
“Spirometer display showing tumblers for program setting (upper one), setting the time interval for the FEV (lower left hand) and BTPS temperature correction (lower right hand). The socket below the upper tumbler links to an XY plotter to print the flow-volume curve in delayed time. The jack plug socket marked ‘record’ provides an output to the cassette recorder.”
Photo and description are kindly provided by Dr. David Chinn, for an upcoming ARTP article.
“McDermott, dry bellows, digital spirometer with calibrating weight and orifice, 1980 Garw Electronic Instruments, Glamorgan, South Wales
This 6V, battery operated, low resistance dry bellows spirometer was used extensively in epidemiological field studies from the 1970s to the 1990s. The example shown is a rigid frame model but another model with collapsible legs was available to increase its portability. The initial models of the spirometer displayed the FEV1 (or FEV0.75) and FVC. A later, digital version was developed that recorded volume expired in 10ms increments and displayed additionally the PEF, MEF50 and MEF75. The data could be processed to replay the flow-volume curve at a reduced speed on any cheap, slow responding XY printer. In addition, the increments could be stored digitally on a magnetic cassette tape for later processing in the laboratory. The spirometer was excellent for recording Helium-Oxygen flow volume curves and for generating off-line moments analysis applied to the spirogram (Mean Transit Time, Moments Ratio etc).”
From ‘Computer applications for patient care”, by Joseph D. Bronzino, published by Addison-Wesley, 1982, page 275.
From ‘Computer applications for patient care”, by Joseph D. Bronzino, published by Addison-Wesley, 1982, page 274.
From ‘Computer applications for patient care”, by Joseph D. Bronzino, published by Addison-Wesley, 1982, page 276.
A version of the Vanguard Spirometer using a disposable pneumotach. From ‘Biomedical Instrumentation and Measurements’, by Cromwell L, Weibell FJ, Pfeiffer EA. Published by Prentice-Hall, 1980, page 226.
Computerized spirometry system. From ‘Biomedical Instrumentation and Measurements’, by Cromwell L, Weibell FJ, Pfeiffer EA. Published by Prentice-Hall, 1980, page 228.
An ingenious valve that used inspiratory and expiratory pressures to fill a small sampling balloon (yes, a condom) with end-tidal gas for steady-state DLCO tests. Valve is pictured upside down. In use the sampling balloon extended below, not above, the mouthpiece. From the 1982 Collins Supply Catalog.
From the 1982 Collins Supply Catalog.