Key result
Indirect microwave diathermy fails to alter autonomic nervous system parameters versus sham in healthy adults.
Why the study?
The effect of the physical therapy treatment room environment using microwave diathermy on the autonomic nervous system of the human body was not well understood.
Does microwave diathermy irradiation affect autonomic nervous system parameters in healthy adults?
RCT (n=24)
Single-blind
Counterbalanced crossover
No
Does microwave diathermy irradiation affect autonomic nervous system parameters in healthy adults?
Absolute Event Rate: 55.83% vs 53.1%
p-value: p=0.60
Microwave diathermy in a physical therapy environment does not significantly affect autonomic nervous system parameters in healthy adults.
Small study in healthy adults leaves open whether microwave diathermy alters HRV in clinical settings; prospective patient trials needed.
PURPOSE: The purpose of this study is to investigate the effect of the physical therapy treatment room environment using microwave diathermy on the autonomic nervous system of human body. METHODS: Participants were 24 healthy adults. Standard deviation of all normal R-R intervals(SDNN), root mean square of successive differences(RMSSD), low frequency(LF), high frequency(HF), LF/HF ratio were compared in microwave irradiation and non-irradiation group. Data were analyzed in Wilcoxon's signed-ranks test and Mann-Whitney U test. RESULTS: Standard deviation of all normal R-R intervals (SDNN), root mean square of successive differences (RMSSD), low frequency(LF), high frequency(HF), LF/HF ratio were not significantly different in microwave irradiation group. Standard deviation of all normal R-R intervals(SDNN), root mean square of successive differences (RMSSD), low frequency(LF), high frequency(HF), LF/HF ratio were not significantly different in microwave non-irradiation group. Standard deviation of all normal R-R intervals(SDNN), root mean square of successive differences (RMSSD), low frequency(LF), high frequency(HF), LF/HF ratio were not significantly different between two groups. CONCLUSION: There was no significant change in the sympathetic nervous system and parasympathetic nervous system regardless of the presence of microwave irradiation. There was no significant change in the autonomic nervous system adaptability regardless of the presence of microwave irradiation.According to this study, microwave diathermy does not have significant effect on the autonomic nervous system.Future study is necessary to investigate the long term effect of the physical therapy treatment room environment using microwave diathermy on the autonomic nervous system of the human body.
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Shin et al. (2015) conducted an RCT in Healthy adults (n=24). Microwave diathermy (indirect exposure) vs. Sham exposure (0W) was evaluated on Standard deviation of all normal R-R intervals (SDNN) post-exposure (p=0.60). Indirect exposure to microwave diathermy did not significantly alter autonomic nervous system parameters, including SDNN (p=0.60), compared to sham exposure in healthy adults.
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