Methodology for estimation of undeformed thickness of arterial tissues

Schwarz, David; Fleisman, Jiri; Vitásek, Radek; Polzer, Stanislav

doi:10.1038/s41598-023-28871-y

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…However, these methods are also prone to errors and were not considered to be suitable alternatives. A new method described by Schwarz et al [41] could probably be adapted and used for reliable and swift determination of specimen thickness. The technique involves using transverse force loading to measure a pressure-thickness response.…”

Section: Limitationsmentioning

confidence: 99%

Approach to standardized material characterization of the human lumbopelvic system – Testing and evaluation

Gebhardt,

Kurz,

Grundmann

et al. 2024

Preprint

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The osseo-ligamentous lumbopelvic complex is a crucial component of the human musculoskeletal system and has been increasingly the focus of medical research and treatment planning. Numerical simulations can play a key role in better understanding the load-carrying behavior of this system, but material data in this arena remain rare. In addition, the literature lacks standardized and reproducible methods for determining biomechanical material parameters.To address these shortcomings, we obtained bone and soft tissue samples from three female and two male cadavers (average age: 77.3 years) for testing and evaluation. The elastic modulus of cortical bone averaged at 1750 MPa with a mean ultimate strength of 28.2 MPa. Whereas for trabecular bone the evaluation yields to 32.7 MPa and 1.26 MPa. Furthermore, the soft tissue specimens exhibited a mean elastic modulus of 148 MPa and an ultimate strength of 14.3 MPa for fascial tissue, in contrast to ligamentous tissue with 103 MPa and 10.7 MPa.Knowledge of these material parameters of the human pelvis, which differ from those of long bones, could, in combination with the revealed dependence on harvesting location and density, lead to more precise mechanical simulations. Such simulations might in turn promote the development of better suited implants.Together with a previous publication dealing with sample preparation, this work is intended to contribute to the standardization of mechanical testing of human tissue. Easy-to-conduct bending tests as well as direct tension and compression tests are recommended, and the proposed mechanical boundary conditions are explained and documented. These technical recommendations allow for better comparability and reproducibility in future biomechanical studies. This protocol, developed for the human pelvis, could easily be transferred to other anatomical regions.

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Section: Limitationsmentioning

confidence: 99%

Approach to standardized material characterization of the human lumbopelvic system – Testing and evaluation

Gebhardt,

Kurz,

Grundmann

et al. 2024

Preprint

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Optimizing Arterial Tissue Thickness Measurement Protocols: Digital Vernier Caliper Versus Digital Thickness Gauge

Ion,

Asztalos,

Ciucanu

et al. 2024

MPs

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Background: The aim of this study is to analyze the reproducibility of sample thickness measurements taken by a non-experienced user by comparing a standard digital vernier caliper, with four different protocols, to a specialized thickness gauge. Methods: The current study is a methodological study where we examined the thickness of the porcine arterial wall in the thoracic aorta of six pigs. Two adjacent samples of 10 × 10 mm from each aorta were excised longitudinally from the anterior wall, resulting in twelve specimens. Five protocols were employed to measure the thickness of each sample. In four of these protocols, digital vernier calipers (Multicomp PRO MP012475) were utilized, while the fifth protocol utilized a specialized digital thickness gauge (Mitutoyo 547-500S, Mitutoyo Corp., Kawasaki, Japan). Results: We observed a higher average thickness of the samples during the initial measurement compared to the second measurement (1.11 ± 0.16 vs. 0.94 ± 0.17, p = 0.0319) with the first protocol and smaller values than those determined at the last measurement (0.93 ± 0.15 vs. 1.10 ± 0.15, p = 0.0135) for the third protocol. Further, with the digital vernier calipers, we recorded lower values for all four protocols than for the digital thickness gauge determinations. In addition, we computed the ratio of the thicknesses measured during the first, second, and third measurements to analyze how consistent the values were across the three consecutive measurements, with no difference regarding the third, fourth, and control protocols. Conclusions: The digital thickness gauge offers dependable measurements, regardless of the user’s expertise in assessing tissue thickness, and demonstrates a substantially higher reproducibility when compared to the digital vernier. We also found that taking an average of the thickness measurements from four specific points on each half of the sides or on each diagonal of each corner yielded consistently reliable results over time when using a standard digital vernier caliper instead of a specialized one.

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Methodology for estimation of undeformed thickness of arterial tissues

Cited by 2 publications

References 28 publications

Approach to standardized material characterization of the human lumbopelvic system – Testing and evaluation

Approach to standardized material characterization of the human lumbopelvic system – Testing and evaluation

Optimizing Arterial Tissue Thickness Measurement Protocols: Digital Vernier Caliper Versus Digital Thickness Gauge

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