Axial speed of sound for the monitoring of injured equine tendons: A preliminary study

JOURNAL OF BIOMECHANICS

卷:45

Article

Vergari, Claudio^1,2  Pourcelot, Philippe²  Ravary-Plumioen, Berangere²  Dupays, Anne-Gaelle²  Jacquet, Sandrine²  Audigie, Fabrice²  Denoix, Jean-Marie²  Laugier, Pascal³  Mitton, David^4,5,6  Crevier-Denoix, Nathalie² 

[1] Univ Paris Est, Ecole Natl Vet Alfort, USC Biomecan & Pathol Locomotrice Cheval, USC BPLC 957, F-94704 Maisons Alfort, France

[2] INRA, USC BPLC 957, F-94704 Maisons Alfort, France

[3] Univ Paris 06, UMR CNRS7623, LIP, F-75005 Paris, France

[4] Univ Lyon, F-69622 Lyon, France

[5] IFSTTAR, LBMC, UMR T9406, F-69675 Bron, France

[6] Univ Lyon 1, F-69622 Villeurbanne, France

关键词: Tendon;    Quantitative ultrasound;    Speed of sound;    Elastic modulus;    Mechanical properties;   

DOI  :  10.1016/j.jbiomech.2011.10.016

来源: Elsevier

【 摘 要 】

Equine superficial digital flexor tendons (SDFT) are often injured, and they represent an excellent model for human sport tendinopathies. While lesions can be precisely diagnosed by clinical evaluation and ultrasonography, a prognosis is often difficult to establish; the knowledge of the injured tendon's mechanical properties would help in anticipating the outcome. The objectives of the present study were to compare the axial speed of sound (SOS) measured in vivo in normal and injured tendons and to investigate their relationship with the tendons' mechanical parameters, in order to assess the potential of quantitative axial ultrasound to monitor the healing of the injured tendons. SOS was measured in vivo in the right fore SDFTs of 12 horses during walk, before and 3.5 months after the surgical induction of a bilateral core lesion. The 12 horses were then euthanized, their SDFTs isolated and tested in tension to measure their elastic modulus and maximal load (and corresponding stress). SOS significantly decreased from 2179.4 +/- 31.4 m/s in normal tendons to 2065.8 +/- 67.1 m/s 3.5 months after the surgical induction, and the tendons' elastic modulus (0.90 +/- 0.17 GPa) was found lower than what has been reported in normal tendons. While SOS was not correlated to tendon maximal load and corresponding stress, the SOS normalized on its value in normal tendons was correlated to the tendons' elastic modulus. These preliminary results confirm the potential of axial SOS in helping the functional assessment of injured tendon. (C) 2011 Elsevier Ltd. All rights reserved.

【 授权许可】

Free