Accession Number : ADA260320
Title : Development of a Multi-Frequency Jet Ventilator for use Under Battlefield Conditions
Descriptive Note : Final rept.
Corporate Author : SCIENTIFIC RESEARCH ASSOCIATES INC GLASTONBURY CT
Personal Author(s) : Weinberg, Bernard C ; Gluck, E H ; McDonald, H
Report Date : 12 Jun 1987
Pagination or Media Count : 64
Abstract : The primary objective of the Phase I study was to investigate the effectiveness of ultra-high frequency jet ventilation in sustaining wounded with penetrating chest injuries. To this effect, an experimental program was undertaken to simulate such injuries on animals by creating a reproducible wound in the laboratory. A bronchopleural cutaneous fistula was surgically induced in ten pigs and their progress with three different modes of ventilation: conventional, conventional jet and ultra-high frequency jet, were monitored. Blood gases and vital signs were taken and the flow through the fistula was measured. The data obtained in these experiments demonstrate a significant benefit in oxygen loading as evidenced by an improved a/A ratio during ultra- high frequency jet ventilation as compared to either conventional jet or conventional ventilation. There was also a marked decrease in the gas flow through the bronchopleural fistula in ultra-high frequency jet ventilation as compared to the other two modes. Statistical analyses confirm that the observed differences were statistically significant. These results indicate that ultra- high frequency jet ventilation offers significant advantages and benefits in ventilating lungs in which a large bronchopleural fistula has formed. A secondary objective was to investigate methods for measuring the resonant frequency of the lung system in conjunction with jet ventilation. Results demonstrated the feasibility of the proposed approach.
Descriptors : *LIFE SUPPORT SYSTEMS , *VENTILATORS , FREQUENCY , RATIOS , HIGH FREQUENCY , BATTLEFIELDS , SECONDARY , VENTILATION , PHASE , OXYGEN , RESONANT FREQUENCY , FISTULAS , SWINE , BLOOD GASES , GAS FLOW , LUNG , ANIMALS , LABORATORIES , WOUNDS AND INJURIES , FLOW , THORAX , BENEFITS
Subject Categories : Medicine and Medical Research
Life Support Systems
Distribution Statement : APPROVED FOR PUBLIC RELEASE