【摘 要】
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Low-power laser therapy has been used for the non-surgical treatment of mild to moderate carpal tunnel syndrome, although its efifca-cy has been a long-standing
【机 构】
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Department of Neurology, Tongji Hospital, Tongji University School of Medicine, Shanghai, China“,”Sh
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Low-power laser therapy has been used for the non-surgical treatment of mild to moderate carpal tunnel syndrome, although its efifca-cy has been a long-standing controversy. The laser parameters in low-power laser therapy are closely related to the laser effect on human tissue. To evaluate the efifcacy of low-power laser therapy, laser parameters should be accurately measured and controlled, which has been ignored in previous clinical trials. Here, we report the measurement of the effective optical power of low-power laser therapy for carpal tunnel syndrome. By monitoring the backside relfection and scattering laser power from human skin at the wrist, the effective laser power can be inferred. Using clinical measurements from 30 cases, we found that the effective laser power differed signiifcantly among cases, with the measured laser relfection coefifcient ranging from 1.8%to 54%. The relfection coefifcient for 36.7%of these 30 cases was in the range of 10–20%, but for 16.7%of cases, it was higher than 40%. Consequently, monitoring the effective optical power during laser irradiation is necessary for the laser therapy of carpal tunnel syndrome.
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