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Lasers in Medical Science

, Volume 29, Issue 5, pp 1585–1591 | Cite as

Development of the theragnostic optical system for a high-intensity laser therapy (HILT)

  • Sangkwan Lee
  • Tae-Hoon Kim
  • Jong-In Youn
Original Article

Abstract

Recently, high-intensity laser therapy (HILT) has been introduced for muscle disorders, but its efficacy has not been confirmed due to the absence of quantitative assessments and treatment feedback data in real-time. In this clinical study, a theragnostic optical system comprised of a high-intensity laser and a non-invasive optical monitoring system was developed to assess spasticity. To avoid interference between the two different light sources, the therapeutic wavelength for HILT was selected at 808 nm, one of the isosbestic points. The monitoring system based on a near-infrared spectroscopy (NIRS) was utilized for measuring hemoglobin concentrations according to a modified Beer-Lambert’s law. The transitory HILT effect was evaluated from patients experiencing spasticity after stroke. Our results showed the proportionate relationship between manual muscle testing grades and the HILT effect on hemiplegic patients. The developed system proved to be useful for the simultaneous assessment and treatment of spasticity, and it holds promise for real-time monitoring of hemoglobin concentrations during laser therapy.

Keywords

High-intensity laser therapy Hemiplegic patients Near-infrared spectroscopy Muscle spasticity Spasticity Theragnostic optical system 

Notes

Acknowledgments

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010–0008977, 2010–0029468) and a grant of the Traditional Korean Medicine R&D Project, Ministry for Health & Welfare & Family Affairs, Republic of Korea (B110010).

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Copyright information

© Springer-Verlag London 2014

Authors and Affiliations

  1. 1.Department of Internal Medicine and Neuroscience, College of Oriental MedicineWonkwang UniversityIksanSouth Korea
  2. 2.Department of Biomedical Engineering, College of Medical ScienceCatholic University of DaeguGyeongsanSouth Korea

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