Portwood M M, Lieberman J S, Taylor R G
Arch Phys Med Rehabil. 1987 Feb;68(2):116-8.
Three cases of lower extremity reflex sympathetic dystrophy (RSD) responded dramatically to a daily low dose ultrasound (0.5 watts/cm2 X 5 minutes) therapy to the tarsal tunnel and plantar nerve distribution, and the use of a shoe insert. Two of the three cases had been refractory to more standard therapy for RSD, including pharmacologic agents. All three patients preferred a conservative approach to surgical sympathectomy. No complications were observed, and all three cases are now symptom free. Daily ultrasound treatments are time-consuming and costly but are safe and may be useful for patients who refuse surgical sympathectomy. We hypothesize that ultrasound may have affected peripheral sympathetic nerve fibers. However, more indirect effects of ultrasound, such as increased blood flow to the limb, may be part of the action mechanism as well.
三例下肢反射性交感神经营养不良（RSD）患者，经每日低剂量超声（0.5瓦/平方厘米×5分钟）治疗跗管和足底神经分布区域，并使用鞋垫后，症状显著改善。三例患者中有两例对包括药物治疗在内的更标准的RSD治疗方法无效。所有三名患者均倾向于采用保守方法而非手术交感神经切除术。未观察到并发症，且所有三例患者目前均无症状。每日超声治疗耗时且费用高昂，但安全，对于拒绝手术交感神经切除术的患者可能有用。我们推测超声可能影响了外周交感神经纤维。然而，超声的更多间接作用，如增加肢体血流量，也可能是作用机制的一部分。
