Reed B, Ashikaga T
Department of Physical Therapy, University of Vermont, Burlington 05405, USA.
J Orthop Sports Phys Ther. 1997 Sep;26(3):131-7. doi: 10.2519/jospt.1997.26.3.131.
Heating with continuous wattage ultrasound combined with mobilization procedures is often used to treat ligament "tightness," but the effects of heat on ligament extensibility have not previously been studied in vivo. To address this problem, 25 young adults underwent knee joint displacement tests on a Genucom arthrometer before and after continuous wattage ultrasound (1 MHZ, 1.5 W/cm2 x 8 min). Preultrasound intrarater reliability (ICC; N = 11) was 0.87-0.98 for varus/valgus and recurvatum tests and 0.70-0.73 for anterior-posterior drawer tests.
Continuous wattage ultrasound was associated with small increases in mean varus/valgus excursion at 0 degree and 20 degrees of knee flexion (p < or = .04) and in recurvatum excursion (p < or = .04) but not in anterior-posterior drawer excursion. The magnitude of the changes was 1.3 degrees or less and represented relative changes of 6.1-9.8%.
Continuous wattage ultrasound at common clinical intensities made some knee ligaments slightly more extensible in normal subjects, although the magnitude of the effect was not deemed clinically significant.
连续功率超声联合松动手法加热常用于治疗韧带“紧绷”，但此前尚未在体内研究热对韧带伸展性的影响。为解决这一问题，25名年轻成年人在连续功率超声（1兆赫，1.5瓦/平方厘米×8分钟）前后，在Genucom关节测量仪上进行了膝关节位移测试。超声检查前，内观察者可靠性（ICC；N = 11）在内外翻和后伸试验中为0.87 - 0.98，在前抽屉试验中为0.70 - 0.73。
连续功率超声与膝关节屈曲0度和20度时平均内外翻偏移量（p≤0.04）及后伸偏移量（p≤0.04）的小幅增加有关，但与前抽屉偏移量无关。变化幅度为1.3度或更小，代表相对变化6.1 - 9.8%。
在正常受试者中，常见临床强度的连续功率超声使一些膝关节韧带的伸展性略有增加，尽管这种影响的幅度在临床上不被认为具有显著意义。
