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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(1):46-53.
Effect of Cold Air Therapy in Relieving Spasticity.
Kim, Jin Ho , Han, Tai Ryoon , Lee, Shi Uk
Department of Rehabilitation Medicine, Seoul National University College of Medicine.
냉공기 치료의 경직성 완화 효과에 관한 연구
김진호, 한태륜, 이시욱
서울대학교 의과대학 재활의학교실
Abstract

Objective
To determine the effect of cold air therapy on relieving spasticity, the optimal intramuscular temperature, and the duration of spasticity relief.


Method
Twenty-three 4 months old Korean white rabbits weighing 2 to 3 kg were used. After posterior laminectomy at thoracolumbar junction, the spinal cord was completely transected. After spasticity occurred, cold air was applied to the triceps surae muscles for 30 minutes at three different intramuscular temperatures (32.5, 30, and 25oC). Spasticity was measured pre-treatment, immediately following treatment, after 30 minutes, and after 60 minutes. Clinical parameters (muscle tone, deep tendon reflex, ankle clonus, and Babinski's sign) and electrophysiologic parameters (F/M ratio and H/M ratio) were measured.

Result: Muscle tone and Babinski's sign significantly decreased immediately following treatment in the 32.5oC group, immediately following treatment and after 30 minutes in the 30oC and 25oC group. Deep tendon reflex and ankle clonus significantly decreased immediately following treatment in the 32.5oC group, immdiately following treatment, after 30 minutes in the 30oC group, immediately following treatment, after 30 minutes and after 60 minutes in the 25oC group. The F/M ratio and H/M ratio were not significantly affected in the 32.5oC group but decrease immediately following treatment in the 30oC and 25oC groups. Compound motor unit action potentials were not evoked in 6 out of 16 cases (37.5%) in the 25oC group, resulting in blockage of conduction.


Conclusion
To relieve spasticity with cold air therapy, the intramuscular temperature should be maintained at 30oC. The duration of spasticity relief lasted from 30 minutes to one hour after cold air therapy.

Key Words: Cold air therapy, Spasticity, Spinal cord injury


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