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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(1):134-139.
Changes in the Pressure Threshold of Myofascial Trigger Points Following Freezing Cold Air Application.
Hong, Dae Jong , Choi, Ki Sup , Park, Si Bog , Kim, Young Ho
1Department of Rehabilitation Medicine, Hanyang University College of Medicine.
2Department of Medical Engineering, College of Health Science, Yonsei University.
초저온 냉기를 이용한 한냉치료후 동통유발점 압통역치의 변화
홍대종, 최기섭, 박시복, 김영호1
한양대학교 의과대학 재활의학교실 및 1연세대 보건과학대학 의용전자공학과
Abstract

Objective
The purpose of this study is to evaluate the effects of cold air application on the pressure threshold of myofascial trigger points.


Method
The 60 patients with myofascial trigger points in unilateral infraspinatus muscle were divided into 3 groups with equal number and cold air was applied using CRAis (Kyung-won Century, Korea) for 1, 3 and 5 minutes. We examined the changes of pressure threshold in myofascial trigger points before, immediately after and 30 minutes after cold air application. Also we examined the changes of pressure threshold of contralateral infraspinatus muscles.


Results
1) The pressure threshold of trigger point in infraspinatus muscle were increased immediately and 30 minutes after the cold air application as assessed by the pressure algometer (p<0.05).

2) There was no significant correlations in the changes of pressure threshold among 3 groups after the cold air application (p>0.05).

3) There was no significant correlations among the age, the body mass index and the changes of pressure threshold in myofascial trigger points (p>0.05).


Conclusion
We conclude that the cold air application is a effective method for treatment of myofascial trigger points.

Key Words: Cold air application, Myofascial pain syndrome (MPS), Pressure threshold, Trigger point


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