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| Usefulness of Diagnostic Ultrasound for Detecting Myofascial Change of the Hamstring Muscles due to Immobilization: Experimental Study with Caged Rabbits |
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| Yoon Kyoo Kang, M.D, PhD. Joo Hyun Kim, M.D., Chang Hyung Lee, M.D., Jung Ryul Kim, M.D.*, and Han Kyum Kim, M.D.*, PhD. |
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| Department of Physical Medicine and Rehabilitation Medicine, College of Medicine, Korea University *Department of Pathology, College of Medicine, Korea University |
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| PURPOSE : To evaluate the usefulness of diagnostic ultrasound in the localization of soft tissue changes in the region
of clinically suspected myofascial pain syndrome and to investigate the ultrasonographic and pathologic differences
of the hamstring muscles between caged and freely mobile rabbits.
MATERIALS and METHODS : A total of eight caged rabbits were used in this study. Four rabbits (age: two were 3-4
months, and the other two were 8-9 months) were raised in a small cage (40×50×30 cm), and the other four
rabbits (age: two were 3-4 months while the other two were 8-9 months) raised in a yard where they were free
to move around. First, clinically identified myofascial trigger point-taut band or nodule was identified followed
by diagnostic ultrasound examination of the hamstring and gluteus muscles and injection of Indian ink of the
band or nodule. Biopsies were performed to include the hyperechoic regions as well as clinically identified myofascial
trigger points, and the obtained specimens were stained with hematoxylin-eosin and masson-trichrome.
RESULTS : The analysis of the results of the ultrasound study and pathologic study found correlation between the
pathologic identification of myofascial trigger point and diagnostic ultrasound, where palpable nodules of caged
animal, older more than younger one showed greater extent of increment of echogenecity and degenerative
pathologic changes such as fatty changes and appearance of hyaline fibers.
CONCLUSION : Diagnostic ultrasound could be applied to identify or observe soft tissue changes in the regions of
clinically identified myofascial trigger points. A pattern has emerged where soft tissue changes were more likely
to be observed in the caged animal where their movements were restricted and prone to fixed position. Further study
to investigate the reversibility of pathologic changes of caged animal should be carried out. |
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| Keyword : Muscles, diseases Ultrasound(US), experimental |
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pdf파일 : 65-73강윤규.pdf 
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> Journal > Journal Search 
Journal of Korean Society of Ultrasound in Medicine 2002 ; 21 (1) : p.65-73
