Indentation instrument for the measurement of cartilage stiffness under arthroscopic control
| Autor: | Jukka S. Jurvelin, T. Lyyra, Ilkka Kiviranta, U. Väätäinen, P. Pitkänen |
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| Rok vydání: | 1995 |
| Předmět: |
Cartilage
Articular musculoskeletal diseases Materials science Knee Joint Biomedical Engineering Biophysics Shear modulus Arthroscopy Cadaver Indentation medicine Humans medicine.diagnostic_test Cartilage technology industry and agriculture Biomechanics Reproducibility of Results Stiffness Equipment Design Anatomy musculoskeletal system Elasticity Biomechanical Phenomena body regions medicine.anatomical_structure Regression Analysis Stress Mechanical medicine.symptom Arthroscopes Biomedical engineering |
| Zdroj: | Medical Engineering & Physics. 17:395-399 |
| ISSN: | 1350-4533 |
| DOI: | 10.1016/1350-4533(95)97322-g |
| Popis: | Changes in the biomechanical properties of articular cartilage are one of the first signs of the tissue degeneration. We have developed a small size indentation instrument for the quantification of cartilage stiffness under arthroscopic control. During measurement, the indenter imposes a constant deformation on the cartilage and the maximal indenter force, by which the cartilage resists the deformation, is used as a measure for cartilage stiffness. The instrument has been tested in laboratory conditions with elastomer and cadaver knee joint cartilage samples. A linear relationship was found between indenter force and elastomer stiffness (r = 0.990, n = 14) as well as between indenter force and cartilage shear modulus obtained by a reference device (r = 0.879, n = 22). Also, the correlation between two repeated measurements at the measurement sites, used to evaluate the reproducibility, was linear (r = 0.953, n = 16). Quantitative detection of cartilage stiffness is possible with the instrument. |
| Databáze: | OpenAIRE |
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