Airway Resistance Measurement at Depth.
IBM FEDERAL SYSTEMS DIV GAITHERSBURG MD
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The report discusses the design and development of a whole body plethysmograph system intended for ultimate use as a means of measuring airway resistance under ambient hyperbaric conditions for normal breathing patterns. A customer supplied plenthysmograph was greatly modified towards achieving this goal. At present the plethysmograph can be used to make measurements of airway resistance for any breathing patterns at BTPS conditions. A computer program has been written which provides automatic correction of the data for a pressureflow lag. In addition, the program includes compensation techniques requiring additional validation which should allow data obtained at ambient conditions to be utilized. The hardware design and modifications are discussed with respect to the guidelines used, the approach taken, and the design achieved. The operational use of the system is described in the sections concerning installation and calibration, operating procedures, data analysis techniques and the computer program. Present capabilities, potential error sources, and specific recommendations round out the project description. Author
- Biomedical Instrumentation and Bioengineering
- Life Support Systems