Effects of therapeutic ultrasound on the activity of the mononuclear phagocyte system in vivo |
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| Authors: | A H Saad A R Williams |
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| Affiliation: | 1. Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY;2. Department of Orthopaedics and Rehabilitation, University of Rochester Medical Center, Rochester, NY;1. Institute of Food, Nutrition and Human Health, Massey University, Palmerston North 4442, New Zealand;1. Department of Orthopaedic Surgery, Kyungpook National University Hospital, Daegu, Republic of Korea;2. Department of Radiology, Kyungpook National University Hospital, Daegu, Republic of Korea;3. Department of Orthopaedic Surgery, Konkuk University School of Medicine, Seoul, Republic of Korea;4. Department of Orthopaedic Surgery, Asan Medical Center, Seoul, Republic of Korea |
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| Abstract: | Therapeutic intensities of continuous wave ultrasound applied over the umbilical area of female rats resulted in a decrease in the rate of removal of 99mtechnetium radio-labelled sulphur colloid by the mononuclear phagocyte system. The magnitude of this effect increased both with increasing intensity of ultrasound and with the duration of exposure, and was found to be dependent upon the total amount of energy deposited within the umbilical area. This effect appeared to be initiated by an effect of ultrasound upon circulating lymphocytes since isolated lymphocytes sonicated in vitro at therapeutic intensities and then injected intravenously resulted in a decrease in the rate of colloid removal in vivo similar to that observed when the umbilical area had been sonicated in vivo. The mechanism by which this is thought to occur is discussed. |
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