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KMID : 0377519840090010103
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Chung-Ang Journal of Medicine
1984 Volume.9 No. 1 p.103 ~ p.112
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An Experimental Study of Transtracheal Controlled Ventilation
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Koo Gill-Hoi
Cho Hyung-Sang
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Abstract
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Sudden obstructive changes in diameter of upper respiratory tract may affect the usual process of gas exchanges in the pulmonary system with mild to severe changes in arterial blood gases and the another organ functions. Therefore immediate restoration of an adequate airway in these patients may be lifesaving. It is possible to measure regional tissue oxygen and carbon dioxide tension, and other gas tensions simultaneously and continuously because mass spectrometer has been applied to the measurement of gas tension in tissue recently. So we can understand the organ perfusion status and metabolism better than before. Eight mongrel dogs were ventilated with 100% of oxygen by volume ventilator through inlet diameter 9㎜, 4.5㎜, 3㎜ and 1.8㎜ endotracheal tubes and physiologic responses were examined. The following results were obtained. 1. Blood gas determinations showed the animal to be adequately ventilated even in narrow constriction to 1/3 of normal airway size(9㎜). 2. Controlled values of intracerebral oxygen and carbon dioxide tension were 39.50±3.97(34∼45)mmHg and 58.38±5.21(39∼62)mmHg, and those of intramyocardial were 79.38±7.02(68∼90)mmHg and 49.38±8.46(39∼74)mmHg respectively. 3. There was no statistically significant changes in intracerebral and intramyocardial gas tensions with 1/2 and 1/3 size of normal airway.
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