Objective: The aim of this study is to estimate and compare the effects of low-level laser therapy and interferential current therapy in patients with complex regional pain syndrome type I. Material and Methods: Prospective randomized clinical research, including 45 patients with post-traumatic unilateral complex regional pain syndrome type I, treated at the Clinical Center Nis from December 2004 to January 2007. Low-level laser therapy and kinesitherapy were applied in group A (n=20), whereas group B (n=25) was treated with interferential current and kinesitherapy. For assessment of the therapeutic effect, the following parameters were tested: pain intensity was determined by visual analog scale, figure-of-eight measurement was used to determine the circumference of the affected part of the extremity, and range of motion of the affected joint was measured by a standard goniometer. Results: Statistically significant differences were obtained for all tested parameters in both groups, but the difference was greater in group A compared to group B (p<0.05). Conclusion:The results of this study show that both physical procedures are effective in the treatment of complex regional pain syndrome type I, but the efficiency of laser therapy is statistically significantly higher compared to interferential current therapy.

In this paper the realization and optimization of two coreless open-loop bus bar current transducers based on a Hall effect sensor are presented. Two types of bus bar are evaluated: flat rectangular and rectangular with a restrictive region in the middle. Both realized transducers are capable of measuring AC and DC currents up to 300 A and 10 kHz frequency with nonlinearity less than 0.3% in the entire range. Several methods for resolving issues with the skin effect and stray magnetic fields are presented along with the experimental test results. Some of the presented methods are novel and have never been evaluated.

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By the use of the infrared thermovision we showed that in the treatment of CRPS I both physical medicine methods were effective, but the effectiveness of laser therapy was statistically significantly higher compared to that of the interferential current therapy.

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