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Medicines 2018, 5(1), 24; https://doi.org/10.3390/medicines5010024

Gender Differences in Laser Acupuncture—Results of a Crossover Study with Green and Yellow Laser at the Ear Point Shenmen

1
TCM Research Center Graz, Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, and Research Unit for Complementary and Integrative Laser Medicine, Medical University of Graz, 8036 Graz, Austria
2
Institute of Acupuncture-Moxibustion, China Academy of Chinese Medical Sciences, 100700 Beijing, China
3
Donders Institute for Brain, Cognition and Behaviour, Radboud University, 6525 Nijmegen, The Netherlands
4
Research Group of Pain and Neuroscience, Kyung Hee University, 02447 Seoul, Korea
*
Author to whom correspondence should be addressed.
Received: 25 January 2018 / Revised: 12 March 2018 / Accepted: 15 March 2018 / Published: 15 March 2018
(This article belongs to the Special Issue Auricular Medicine: Gateway to the Brain in Healing)
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Abstract

Background: One of the most commonly used auricular acupuncture points selected for different pain treatment regimens is Shenmen. This point on the ear has been recognized as having a wide number of applications, as found by scientific investigation. Methods: Within this crossover study, the ear acupoint Shenmen was stimulated with two different kinds of laser (green, 532 nm and yellow, 589 nm) in 22 healthy volunteers (13 female, 9 male; mean age ± SD = 25.3 ± 4.1 years; range 21–36 years). Both green and yellow lasers were used for 15 min in the same volunteers in two different sessions. Results: The most prominent finding was that systolic blood pressure decreased significantly (p = 0.048) after yellow laser stimulation. Heart rate also decreased significantly (p < 0.001), whereas heart rate variability ratio low frequency (LF)/high frequency (HF) (p < 0.001) increased. The effects were significantly more pronounced in females than in males. In addition, the temperature was measured, and temperature increases were demonstrated at different locations on the ear using imaging methods. Conclusions: This study shows evidence of the effect of auricular laser acupuncture. However, a comparison with other publications was impossible because this is the first study using green and yellow laser stimulation on the ear. View Full-Text
Keywords: acupuncture; green laser; yellow laser; ear acupuncture; Shenmen; gender; blood pressure; heart rate; heart rate variability; temperature acupuncture; green laser; yellow laser; ear acupuncture; Shenmen; gender; blood pressure; heart rate; heart rate variability; temperature
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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 (CC BY 4.0).
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Litscher, D.; Wang, J.; Litscher, G.; Li, G.; Bosch, P.; van den Noort, M.; Wang, L. Gender Differences in Laser Acupuncture—Results of a Crossover Study with Green and Yellow Laser at the Ear Point Shenmen. Medicines 2018, 5, 24.

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