Effect of coupling medium temperature on rate of intra-muscular temperature rise using continuous ultrasound
- UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
- David H. Perrin, Former Provost and Executive Vice Chancellor (Creator)
- Sandra J. Shultz, Professor and Chair (Creator)
- Institution
- The University of North Carolina at Greensboro (UNCG )
- Web Site: http://library.uncg.edu/
Abstract: Objective: We determined the effects of coupling medium temperature on the rate of intramuscular temperature rise (RTR) during continuous ultrasound.
Design and Setting: Ultrasound was applied in a continuous mode at a frequency of 1 MHz and intensity of 1.5 W/cm^sup 2^. Each subject received 3 treatments, using water-based coupling gel at temperatures of 18 deg C, 25 deg C, and 39 deg C. All treatments were performed in an athletic training room under controlled environmental conditions.
Subjects: Eighteen healthy male subjects (mean age = 23.6 +/- 3.5 years; height = 177.8 +/- 6.9 cm; weight = 76.6 +/- 8.2 kg; calf size = 37.6 +/- 2.4 cm) participated in this study.
Measurements: A thermistor was inserted into the left medial triceps surae at a depth of 5 cm, and baseline tissue temperatures were recorded before treatment. Intramuscular temperature was recorded every 30 seconds until the temperature rose 4 deg C above baseline or until discomfort was felt. RTR was calculated by dividing the absolute temperature change by treatment time.
Results: A 1-way, repeated-measures analysis of variance revealed a significant difference in RTR among gel temperatures. RTR was significantly faster using the 25 deg C gel compared with the 18 deg C and 39 deg C gels. There was no difference between the 18 deg C and 39 deg C gel treatments.
Conclusions: These results suggest that the use of a cooled or heated gel may be counterproductive when maximal thermal effects are desired within a given time frame.
Effect of coupling medium temperature on rate of intra-muscular temperature rise using continuous ultrasound
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Created on 1/1/2000
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Additional Information
- Publication
- Journal of Athletic Training, 35:417-421
- Language: English
- Date: 2000
- Keywords
- Modalities, Thermal, Water-based gel