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International Journal of Photoenergy
Volume 2012, Article ID 238468, 6 pages
Research Article

Inhibitory Effects of Far-Infrared Ray-Emitting Belts on Primary Dysmenorrhea

1Department of Biomedical Engineering, Hungkuang University, 34 Chung-Chie road, Shalu, Taichung 443, Taiwan
2Department of Diagnostic Radiology, Taipei Medical University Hospital & Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei 110, Taiwan
3Department of Applied Cosmetology and Master Program of Cosmetic Science, Hungkuang University, 34 Chung-Chie road, Shalu, Taichung 443, Taiwan

Received 1 December 2011; Revised 21 May 2012; Accepted 5 June 2012

Academic Editor: Timon Cheng-Yi Liu

Copyright © 2012 Ben-Yi Liau et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study investigated the therapeutic effect of the far-infrared ray-emitting belt (FIRB) in the management of primary dysmenorrhea in female patients. Forty adolescent females with primary dysmenorrhea were enrolled in the study. Quantitative measurements were taken during the menstruation. Several parameters were measured and compared, including temperature, abdominal blood flow, heart rate variability, and pain assessment. Statistical analysis shows that treatment with FIRB had significant efficiency in increasing regional surface temperature and abdominal blood flow, widening standard deviation of normal-to-normal RR intervals, and reducing VRS and NRS pain scores. The application of an FIRB appears to alleviate dysmenorrhea.