科研之友
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摘要
Objective To (1) determine the temperature change in equine tendon and muscle during therapeutic ultrasound and (2) develop guidelines for treating horses for muscular or tendinous injury using therapeutic ultrasound. Study Design Experimental, in vivo study. Animals Adult horses (n=10). Methods Thermistors were inserted in the superficial and deep digital flexor tendons (SDFT and DDFT) of the thoracic limbs of 10 adult horses. On the left, 3.3MHz therapeutic continuous ultrasound was done for 10minutes at an intensity of 1.0W/cm2 and for the right thoracic limb at 1.5W/cm2. Thermistors were placed at 1cm, 4cm, and 8cm depths in the epaxial muscles of the same 10 horses, for a 20-minute treatment at a frequency of 3.3MHz and intensity of 1.5W/cm2. Temperature was recorded before, during, and after treatment. Data were statistically analyzed. Results Mean temperature rise was 3.5 degrees C in the SDFT and 2.5 degrees C in the DDFT at the end of the 1.0W/cm2 treatment (P=.94) and 5.2 degrees C in the SDFT and 3.0 degrees C in the DDFT at the end of the 1.5-W/cm2 treatment (P=.48). Mean temperature rise in epaxial musculature was 1.3 degrees C at a depth of 1.0cm, 0.7 degrees C at 4.0cm, and 0.7 degrees C at 8cm. Conclusions The SDFT and DDFT are heated to a therapeutic temperature using a frequency of 3.3MHz and intensity of 1.0W/cm2. The epaxial muscles are not heated to a therapeutic temperature using a frequency of 3.3MHz and an intensity of 1.5W/cm2.
- 出版日期2013-4
