KINETIC-ENERGY LOSS AND CONVECTIVE ACCELERATION IN RESPIRATORY RESISTANCE MEASUREMENTS

被引:73
作者
LORING, SH
ELLIOTT, EA
DRAZEN, JM
机构
[1] HARVARD UNIV,SCH MED,DEPT MED,BOSTON,MA 02115
[2] PETER BENT BRIGHAM HOSP,DEPT MED,BOSTON,MA 02115
关键词
Airway resistance; Endotracheal tube; methods; Trachea model;
D O I
10.1007/BF02713989
中图分类号
R56 [呼吸系及胸部疾病];
学科分类号
摘要
Endotracheal tube (ETT) resistance measured in isolation may differ from the effective ETT resistance in vivo. Much of this difference results from the dissipation of kinetic energy near regions of abrupt cross-sectional area change at the end of the ETT. Measurements made on an artificial ETT-tracheal model illustrate that effective ETT resistance is variable and dependent on the size of the artificial trachea. These experimental results are consistent with aerodynamic theory and suggest that one cannot assume that ETT resistance measured in isolation will be the same as the effective ETT resistance in vivo. © 1979 Springer-Verlag.
引用
收藏
页码:33 / 42
页数:10
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