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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2021, Vol. 18 ›› Issue (07): 696-700. doi: 10.3877/cma.j.issn.1672-6448.2021.07.015

• Musculoskeletal Ultrasound • Previous Articles     Next Articles

Quantification of passive muscle stiffness in Parkinson's disease by dynamic shear wave elastography

Yuanzi Li1, Lu Yin1, Wen He1, Yang Xiao2, Yongjin Zhou2, Yumeng Wang1, Jing Yang1, Wenyan Huang1, Huiqin Zhang1, Huizi Ma3(), Lijuan Du1()   

  1. 1. Department of Ultrasound, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
    2. Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences, Shenzhen 518055, China
    3. Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
  • Received:2020-03-12 Online:2021-07-01 Published:2021-07-16
  • Contact: Huizi Ma, Lijuan Du

Abstract:

Objective

To investigate the clinical value of dynamic shear wave elastography in the evaluation of muscular rigidity in Parkinson's disease.

Methods

From January to September 2019, 28 patients confirmed with Parkinson's disease and 10 healthy controls at Beijing Tiantan Hospital, Capital Medical University were recruited. Dynamic shear wave elastography was used to record the elastic modulus of the medial gastrocnemius during the ankle joint passive dorsiflexion, the curves of elastic modulus-ankle joint angles were described, and the differences of curve parameters, muscle elastic modulus in relaxation (E0), and slack angle (beyond which the muscle begins to develop passive tension) between the two groups were compared by t-test.

Results

The mean E0 in the Parkinson's disease group was significantly lower than that in the healthy control group [(10.30±2.75) kPa vs (11.64±1.26) kPa; t=-2.704, P=0.009). The slack angle in the Parkinson's disease group was significantly smaller than that of the healthy control group (-27.49±5.23)° vs (-21.77±4.58)°; t=-4.168, P<0.001). There was no significant difference in gastrocnemius muscle thickness or muscle length between the two groups (P>0.05).

Conclusion

Dynamic shear wave elastography can be used to detect the biomechanical characteristics of Parkinson's disease, such as the state of muscle rigidity.

Key words: Parkinson's disease, Ultrasound, Shear wave, Elastography, Slack angle

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