Use of Pain Vision, a Device for Quantitatively Analyzing Perceived Pain, in Pain Assessment during Fasting Therapy for a Case of Pain Disorder

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  • 慢性疼痛の疼痛評価への知覚疼痛定量分析装置Pain Vision^<TM>の有用性 : 絶食療法を施行した疼痛性障害の使用経験より
  • 症例研究 慢性疼痛の疼痛評価への知覚疼痛定量分析装置Pain Visionの有用性 : 絶食療法を施行した疼痛性障害の使用経験より
  • ショウレイ ケンキュウ マンセイ トウツウ ノ トウツウ ヒョウカ エ ノ チカク トウツウ テイリョウ ブンセキ ソウチ Pain Vision ノ ユウヨウセイ : ゼッショク リョウホウ オ シコウ シタ トウツウセイ ショウガイ ノ シヨウ ケイケン ヨリ

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Abstract

Fasting therapy (FT) has been indicated for the patients with chronic pain of psychosomatic origin. However, pain assessment in FT has heretofore been limited to subjective assessment by patients. We herein report our experience with a patient for whom pain was assessed by using Pain Vision (NIPRO Corporation), a device for quantitatively analyzing perceived pain, to record changes in the degree of pain during FT. Case : The patient was a 53-year-old man who developed persistent lower back pain, headache, and leg pain without any clear organic factors in three years. He was diagnosed with somatoform pain disorder and advised and encouraged to undergo FT as a psychosomatic approach. The patient subsequently underwent FT, which comprised a 10-day fasting period followed by a 5-day refeeding period. Pain assessment using Pain Vision was performed prior to FT, the 4^<th> and 9^<th> days of FT, and four days after the conclusion of FT. In addition, pain was also assessed using an autonomic function test (heart rate monitor SA3000P) as well as a pain scale. Results : The minimum current, which indicates the threshold value for perceived pain in assessment using Pain Vision, did not change during the study. However, the corresponding degree of pain increased from 89.2 to 614, 899, and 1607 from the beginning of FT. As for autonomic function, which was simultaneously measured, the low frequency/high frequency ratio increased from 1.127 to 2.427, 3.438, and 15.729. Scores on the pain scale for each measurement point were 7/10, 2/10, 2/10, and 5/10, respectively. Conclusion : These findings suggest that the effects of autonomic function were involved in the mechanism of the present disorder. In addition, Pain Vision enabled objective measurement of changes in the degree of pain during FT, and may be applied in the future in various assessments of chronic pain, including in combination with pain scales.

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