Hong C Z, Liu H H, Yu J
Department of PM&R, University of California Irvine Medical Center, Orange 92668.
Arch Phys Med Rehabil. 1988 Jun;69(6):410-4.
Bilateral tibial nerves of 18 albino rats were mechanically compressed between knee and ankle. Beginning on the fifth day after compression, ultrasound thermotherapy of 0.5 or 1.0watt/cm2 was applied over the area of nerve compression in one limb for one minute three times per week. The other side (control) was not treated. Motor distal latency (DL), motor nerve conduction velocity (NCV) of the segment with nerve compression, and amplitude of the evoked compound muscle action potential (ACMAP) were measured before and immediately after nerve compression and two or three times per week after compression. The recovery rates of NCV and ACMAP of the tibial nerve treated with ultrasound of 0.5watt/cm2 were significantly faster than those of the control nerve. There was no significant change in the recovery rate of DL. However, if ultrasound of 1.0watt/cm2 was applied, the recovery rate of ACMAP of the treated nerve was slower than that of the control nerve. There were no significant changes in the recovery rates of DL and NCV. Low doses of ultrasound thermotherapy may facilitate recovery of compression neuropathy, but higher doses may induce an adverse effect.
对18只白化大鼠的双侧胫神经在膝关节和踝关节之间进行机械压迫。从压迫后的第五天开始，对一侧肢体神经压迫区域施加0.5或1.0瓦/平方厘米的超声热疗，每周三次，每次一分钟。另一侧（对照）不进行治疗。在神经压迫前、压迫后即刻以及压迫后每周两到三次测量运动远端潜伏期（DL）、神经压迫节段的运动神经传导速度（NCV）以及诱发复合肌肉动作电位（ACMAP）的幅度。用0.5瓦/平方厘米超声治疗的胫神经的NCV和ACMAP恢复率明显快于对照神经。DL的恢复率没有显著变化。然而，如果施加1.0瓦/平方厘米的超声，治疗神经的ACMAP恢复率比对照神经慢。DL和NCV的恢复率没有显著变化。低剂量超声热疗可能促进压迫性神经病变的恢复，但高剂量可能产生不良影响。
