Chinese Journal of Tissue Engineering Research ›› 2023, Vol. 27 ›› Issue (23): 3742-3746.doi: 10.12307/2023.578

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Quantifying the elastic characteristics of the median nerve in healthy subjects: reliability of real-time shear-wave elastography

Chen Chao, Geng Fengqin, Shen Suhong   

  1. Luoyang Orthopedic Hospital of Henan Province (Orthopedic Hospital of Henan Province), Luoyang 471000, Henan Province, China
  • Received:2022-09-07 Accepted:2022-10-26 Online:2023-08-18 Published:2023-01-16
  • Contact: Shen Suhong, Master, Chief physician, Luoyang Orthopedic Hospital of Henan Province (Orthopedic Hospital of Henan Province), Luoyang 471000, Henan Province, China
  • About author:Chen Chao, Attending physician, Luoyang Orthopedic Hospital of Henan Province (Orthopedic Hospital of Henan Province), Luoyang 471000, Henan Province, China
  • Supported by:
    Henan Provincial Special Research Project of Traditional Chinese Medicine , No. 2016ZY2076 (to SSH)

Abstract: BACKGROUND: Real-time shear-wave elastography can display tissue elasticity noninvasively, At present, it is mostly used in the study of soft tissue diseases such as thyroid gland and mammary gland, but rarely used in the study of peripheral nerves and their lesions.
OBJECTIVE: To calculate the test-retest and inter-operator reliability of assessing median nerve elasticity by real-time shear-wave elastography and to explore the relationship between the elastic modulus of macroaxis and minor axis of the median nerve at the same measurement site.
METHODS: A total of 20 healthy subjects, including 10 men and 10 women, were randomly recruited in this study. In the reliability test, two operators A and B assessed elastic modulus of the long axis of the median nerve on the handed and unhanded sides using the real-time shear-wave elastography, respectively. Five days later, operator A quantified the median nerve elasticity repeatedly using the same measurement method. In addition, real-time shear-wave elastography was used to measure the elastic modulus of the macroaxis and minor axis of the median nerve at the rasceta. 
RESULTS AND CONCLUSION: In the reliability test, the inter-operator and test-retest reliabilities of the median nerve elastic modulus on the handed side were excellent with the intraclass correlation coefficient of 0.98 and 0.96, respectively. The intra-operator and test-retest reliabilities on the unhanded side were also excellent with the intraclass correlation coefficient of 0.78 and 0.86, respectively. There was no correlation between the elastic modulus of the macroaxis and minor axis of the median nerve (r=0.039, P=0.87). These findings indicate that real-time shear-wave elastography can quantitatively evaluate the elastic characteristics of the median nerve in healthy subjects on the handed or unhanded side with a high reliability. In addition, it can be inferred that the elastic modulus of the minor axis of the median nerve is not reliable in the correlation test, relative to that of the macroaxis of the median nerve that can act as a routine reference index in clinical practice.

Key words: shear-wave elastography, median nerve, elastic modulus, reliability, correlation

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