Elastic modulus of small intestinal submucosa
Leng, Y.; Ding, Z.; Gong, L.
Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 20(3): 292-294
2006
ISSN/ISBN: 1002-1892 PMID: 16579245 Document Number: 597475
to determine the modulus of elasticity (E) of small intestinal submucosa (SIS), a new biological graft material. The longitudinal tensile testing was performed on 21 specimens of canine jejunum with the electronic material test machine. Stress (sigma)-strain (epsilon) data were obtained. It was found that the stress (sigma)-strain (epsilon) data fitted the expression sigma = Kiepsilon(alpha) very well, the mean correlation coefficients R2 was 0. 991 6. Then the expression of the modulus of elasticity (E) of SIS was E=K(1/alpha)sigma(1-1/alpha). The mean values of alpha and K were 3.966 9 and 374.55, so E = 4.3992sigma(0.75). The modulus of elasticity was found to increase with increasing stress. The variations law is similar to that of the vessels. Furthermore when sigma is 0.01333 MPa (100 mmHg), E is about 0.16 MPa, which is similar to that of the vessels.