Table 1.

The mechanical constants of saphenous veins (SVs) with or without cross-linking.

Variables	Low-stretch region (σ=a ɛ+b)			High-stretch region (σ=c ɛ+d)
	Parameter	Native SV	Cross-linked SV	Parameter	Native SV	Cross-linked SV
Cross-linking for 5 minutes	A	0.3089	0.5450	c	5.8292	13.8800
	B	-0.3434	-0.6240	d	-7.6862	-18.7300
	R-square	0.8672	0.9217	R-square	0.5505	0.9143

σ=Cauchy stress; ɛ=stretch ratio; a and c=Young’s elastic modulus; R-square=coefficient of determination