Microcomputer-based system to measure, record and process flow-volume curves, respiratory questionnaire data and environmental exposure.

A microcomputer-based system was developed to measure flow-volume curve parameters, record respiratory questionnaire data and analyse the collected data. The hardware of the system consists of two parts which operate independently and are linked together for data transfer. The first part is a microprocessor-based unit to accurately measure flow-volume curve parameters. The second part is a microcomputer unit used to receive flow-volume curve parameters from the first part, to record responses to questionnaires stored in the unit and to perform all statistical analysis. The software included a monitor program controlling system operations, a data base and a powerful statistical package. Two sets of questionnaires are stored in the system, one for adults and the other for children. The user is only required to enter to the system answers to questions displayed on the screen. Flow-volume data can be entered via the keyboard of the microcomputer unit or transmitted from the flow-volume test unit. The developed system is compact, easy to operate and moderately priced.

Microprocessor-based system for on-line analysis of respiratory responses to exercise.

A microprocessor-based system was developed for the measurement and on-line calculation of values and derivatives of expiratory variables and their response to exercise. The system accepts analog signals from gas analysers, ECG electrodes and flow transducer, digitizes these signals, calculates values of required parameters and presents results on a video display. The system offers the user various options of logging and data processing. Plots of the values of calculated parameters versus exercise time and correlation between variables can be easily produced by the system. A mass storage unit was available with the system to enable the storage of calculated variables for off-line analysis. Hardcopy of displayed results and plots can be provided by the system.

An integrated microprocessor-based system enhanced with graphics for the evaluation of slope-ratios and other flow-volume curve parameters.

A microprocessor-based system is developed to measure and analyse flow-volume curves produced from forced expiratory manoeuvres. The system evaluates the slope-ratio parameter and displays it as a scaled plot against fractions of vital capacity together with a scaled plot of the flow-volume curves on a graphic display. Other conventional parameters and their predicted values are also calculated. Freedom is allowed for the operator to select or reject manoeuvres from several runs. The system is easily run and guided even by an operator with no programming knowledge.