A case of arteriosclerosis obliterans treated with skin temperature biofeedback method

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In the present study we have performed a skin thermal biofeedback therapy (hereafter abbreviated to BF therapy) in the treatment of chilling sensation remaining in the lower extremity as a postoperative sequel of arteriosclerosis obliterans. Once a week at our outpatient clinic, the skin temperature of the right index finger and the right first toe were measured and electromyography of the forehead was carried out. A single session was made up of 15 segments, each of which was 2 minutes ; 5 segments for baseline and 10 segments for BF. For assessment of therapeutic effect, 24 sessions in total were performed using the parameters of (1) subjective symptoms, (2) peripheral skin temperature and (3) finger plethysmography. As a result, the following were observed : (1) improvement of the subjective symptoms, (2) increased skin temperature on application of BF therapy, and (3) increased amplitude of the pulse wave on finger plethysmograph. There are very few reports on BF therapy for organic vascular dysfunctions, particularly for the arteriosclerosis obliterans : to my knowledge, this is the first report ever published. We report here the improvements in clinical symptoms observed in present study, where we have intended to maintain the blood flow volume, which tended to decrease due to central blood vessels narrowed by arteriosclerotic change, by controlling the movements of peripheral blood vessels intentionally.
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