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 11.7×10−6 (dynes/cm2)−1 at zero transmural pressure and 4.9 and 6.9×10−6 (dynes/cm2)−1 at −20 and +20×103 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.

This content is only available via PDF.
You do not currently have access to this content.