Author: Mak, Chi-hang
Title: The influence of Monochromatic Infrared Energy (MIRE) on microcirculation in lower limb
Degree: M.Sc.
Year: 2010
Subject: Hong Kong Polytechnic University -- Dissertations
Infrared radiation in medicine
Microcirculation -- Measurement.
Leg -- Abnormalities -- Patients -- Rehabilitation.
Department: Department of Rehabilitation Sciences
Pages: xiv, 68 leaves : ill. ; 30 cm.
Language: English
Abstract: Monochromatic Infrared Energy (MIRE) is a photo therapy which has approved by the Food and Drug Administration in America for increasing circulation and reducing pain. Clinically. it is used to promote wound healing and improve diabetic sensory neuropathy. It is known that an increase in microcirculation is an important factor that enhances tissue healing by providing a positive healing environment and promoting the different processes during healing. Previously, there was only a case study demonstrated an increase in microcirculation in human after receiving MIRE treatment without any control group. There is a lack of randomized controlled trial to study on the influence of MIRE on the microcirculation of the skin surface of feet in healthy subjects. A randomized placebo-controlled trial was carried out. Thirty healthy volunteers were recruited by convenience sampling in the study. They were randomly assigned either to receive either active MIRE treatment with the dosage set at 1.3 J/cm²/min (active MIRE group); sham MIRE treatment (placebo group); or hot packs (control group) on the left feet for 30 minutes. The reason of applying the hot packs in the control group was to mimick the warm sensation produced by active MIRE to the subjects during the operation. The main outcome measures including capillary blood cell velocity (CBV), superficial skin blood flow (Flux) and skin temperature (°C) over the feet of subjects were recorded by using a video capillaroscopy and a laser Doppler flowmetry before and after the intervention. The difference of both the changes in CBV and Flux recorded among the three groups reached significance (both p < 0.05). Post-hoc comparisons showed that the active MIRE group had a significantly greater increase in both the CBV and Flux as compared with the placebo group and control group (all p < 0.05). No significant difference in the changes of skin temperature was found between the three groups (all p-values > 0.05). In conclusion, a 30-minute MIRE treatment significantly increased the CBV and Flux of the feet as compared with a sham MIRE group and a control group. The skin temperature for all groups remained stable during the study, so the increase in blood circulation by active MIRE was not due to the mild heating effects produced by MIRE. Since the increase of microcircu1ation is an important factor that enhances tissue healing, MIRE could be used to enhance the tissue healing process by increasing the microcirculation.
Rights: All rights reserved
Access: restricted access

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