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Table 3 Studies examining mechanical properties of ILT tissue

From: Micromechanical and Ultrastructural Properties of Abdominal Aortic Aneurysms

Study Year Patients (specimens) Testing method Stress Strain Relation Description of specimens (number) Strength mean (SD) Stiffness mean (SD)
Measure Result (KPa) Measure Result (KPa)
Di Martino et al. [69] 1998 6 (21) UTT Engineering Engineering Linear Circumferential (21) Ultimate Stress 85 (47) Young’s Modulus 131 (64)
Wang et al. [63] 2001 14 (50) UTT Cauchy Engineering Hyperelastic Luminal (28)
Longitudinal (14)
Circumferential (14)
Ultimate Stress 520 (70)
540 (70)
Maximum Tangential Modulus 540 (70)
570 (70)
Medial (22)
Longitudinal (11)
Circumferential (11)
300 (70)
220 (50)
330 (70)
270 (40)
Vande Geest et al. [93] 2006 9 (9) BTT Second Piola–Kirchhoff Green Linear Luminal (9)
Longitudinal (9)
Circumferential (9)
NA—authors measured peak stretch at 40 N/m Maximum Tangential Modulus 231 (29)
201 (16)
Hinnen et al. [87] 2007 6 (10) DMA compression NA NA Linear All (10)
Luminal (4)
Lateral (4)
NA Young’s Modulus  ~ 38 (15)
 ~ 31 (15)
 ~ 41 (15)
Gasser et al. [62] 2008 8 (112) UTT Cauchy Linear Circumferential (24)
Luminal
Medial
Abluminal
Ultimate Stress 156.5 (57.9)
92 (37.5)
47.7 (22.9)
Young’s Modulus 62.9 (19.2)
47.5 (14.9)
41.5 (15.4)
Tong at el. [67] 2011 43 (67) BTT Cauchy Cauchy Luminal ‘Anisotropic’ (10)
Circumferential
Longitudinal
Engineering stress causing rupture 60.5 (6.2) Tangential Modulus at 20 kPa 208 (55)
291 (69)
Luminal ‘Isotropic’ (23)
Circumferential
Longitudinal
189 (48)
206 (71)
Medial (22)
Circumferential
Longitudinal
41.2 (6.5) 137 (39)
145 (47)
Abluminal (12)
Circumferential
Longitudinal
27.9 (4.5) 108 (31)
102 (23)
O’Leary et al. [64] 2014 19 (356) BTT Cauchy Cauchy Nonlinear Type 1 ILT (10) Luminal
Circumferential
Longitudinal
Cauchy stress at strain 1.14 8.34 (2.10)
9.31 (2.53)
Tangential Modulus at strain 1.14 100.27 (27.85)
120.91 (41.61)
Medial
Circumferential
Longitudinal
8.11 (3.92)
8.21 (2.38)
94.56 (29.34)
94.67 (23.31)
Medial/Abluminal
Circumferential
Longitudinal
6.35 (2.47)
6.47 (2.64)
65.13 (27.22)
67.65 (28.54)
Type 2 ILT (6) Luminal
Circumferential
Longitudinal
11.21 (2.69)
12.78 (3.13)
134.81 (39.86)
147.52 (29.62)
Medial
Circumferential
Longitudinal
3.92 (1.98)
5.78 (3.24)
39.06 (19.49)
60.58 (33.92)
Type 3 ILT (3) Luminal
Circumferential
Longitudinal
3.20 (1.49)
3.34 (1.41)
43.65 (30.83)
37.95 (17.72)
  1. UTT indicates uniaxial tensile testing, BTT biaxial tensile testing, DMA dynamic mechanical analysis, NA not applicable, no data