Versatile microcomputer for medical application: use of the system for ventilatory function testing.
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Computers↗
Biomedical subjects
C J Derrett
Publications and source records attributed to C J Derrett.
A digital computer and a lung function test service: efficiency and costs.
An off-line digital computer used to calculate the results of routine lung function tests saved an average of 20% (9.8 min) of the time required per patient when compared with the use of a simple electronic calculator. This saving would permit an increase in the work-load of the laboratory from 1250 to 1500 patients per year if the same tests were used. The cost of suitable computer equipment, however, would exceed that of employing an additional lung function technician.
Computers↗
Active filters: some simple design methods for biomedical workers.
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Electronics, Medical↗
A system for processing by digital computer spirograms acquired in field surveys.
Instrumentation and techniques are described for recording expiratory spirograms in the field and analysing them with a digital computer in the laboratory. A commercially available spirometer is modified, to give an oscillating electrical output signal which is recorded on a cassette tape recorder. The computer displays the spirogram, calculates the forced vital capacity, one-second forced expiratory volume, maximum mid-expiratory flow, and time to expire 25%, 50%, 75%, and 90% of the vital capacity.
Computers↗