Elastic properties of collapsing and expanding trachea.
The compliance of the canine trachea under positive and negative transmural pressures was measured in an in-vivo preparation. The average compliance values found in eight animals were 11.7 X 10(-6) (dynes/cm2)-1 at zero transmural pressure and 4.9 and 6.9 X 10(-6) (dynes/cm2)-1 at -20 and +20 X 10(3) dynes/cm2 transmural pressure, respectively. These compliances were significantly lower than those measured by others in excised preparations. Stress relaxation was noted at all pressure levels.
D000818:Animals; D001696:Biomechanical Phenomena; D001698:Biomedical Engineering; D004285:Dogs; D004548:Elasticity; D011312:Pressure; D014132:Trachea / Q000502:physiology*