[Experimental study on biomechanical properties of porcine trachea]

This is a study to evaluate the biomechanical properties of porcine trachea; the intention is to provide experimental methods as well as evidence for further studies on human trachea and artificial trachea. In the current study, the biomechanical indices such as bending stiffness, radial pedestal and stress-straining, bursting strength, and residual stress were adopted. The findings were as follows: there is residual stress in the trachea; when the 50mm trachea is compressed 50%, the force of radial pedestal is about 10N; the force of break from cricoid to eminence is from 180mmHg to 110mmHg. Meanwhile, the data of bent are gained and the curve of stress-straining is depicted. Rresidual stress exists in porcine trachea, and trachea membrane disrupts with the increasing of endotracheal pressure; meanwhile, the porcine trachea possesses fine properties such as radial pedestal, bending and elongation.