Time-dependent viscoelastic properties along rat small intestine

Table 2 Standard linear solid coefficients determined for duodenum, jejunum, and ileum of rat small intestine (mean±SE)

	α	η	λ(s–1)	R2
Duodenum	0.954±0.023	0.710±0.013	1.04×10–3±1.09–04	0.989
Jejunum	0.978±0.017	0.779±0.012	1.29×10–3±1.05–04	0.992
Ileum	1.005±0.013	0.720±0.012	1.63×10–3±1.33–04	0.992

Table 1 Average opening angle at 45 and 60 min and maximal luminal area and wall thickness for rings cut from rat duodenum, jejunum, and ileum from rat intestine (mean±SE)

	Duodenum	Jejunum	Ileum
Angle (45 min)	211.1±17.2	128.5±10.1b	145.9±9.2b
Angle (60 min)	220.8±12.9	143.9±8.9b	151.4±9.3b
Lumen diameter (mm)	0.86±0.03	0.73±0.04a	0.89±0.03
Wall thickness (mm)	0.88±0.03	0.72±0.06a	0.66±0.02b

^aP<0.05,

^bP<0.01 vs duodenum.

Table 3 Comparison of standard linear solid coefficients obtained in this study and from the literature

	Rat duodenum	Rat jejunum	Rat ileum	Pig aorta[22]	Pig coronary artery[23]
α	0.954	0.978	1.005	0.981	0.971
η	0.71	0.779	0.72	0.263b	0.274b
λ (s–1)	1.04×10–3	1.29×10–3	1.63×10–3	3.31×10–3b	1.17×10–3

^bP<0.01 vs rat intestine.