We previously reported that bone union rate for LIPUS therapy of humerus and femur was inferior as compared with that of tibia and radius/ulna. One of the reasons of this discrepancy may be affected on the distance from skin to the fracture site. We hypothesized that the ideal site and direction for application of LIPUS could be determined by ultrasonogram.
The aim of our study was to report outcomes of treatment for femoral and humerus fresh fracture with LIPUS by targeting method using ultrasonography to detect the fracture location and to determine the direction of LIPUS treatment.
Thirteen fresh fractures of humerus (n = 2) or femur (n = 11) for which LIPUS treatment were performed at Southern TOHOKU General Hospital between April 2015 and June 2018. Seven bones were women, 6 bones were men. Average age was 61.7 years (19–92 years old). Two bones were treated conservative, 4 bones were fixed by intramedullary nailing and 7 bones were by plating.
In all cases, the treatment site and direction were determined by targeting using ultrasonography and LIPUS treatment was performed.
Results: In all bone, radiographic bone union was obtained, and bone union rate was 100%. The average depth from skin to the fracture site was 38.0 mm (22.5–61.9 mm), and the average gap of the fracture site was 3.9 mm (0.6–7.7 mm). The average period of callus formation was 1.2 months and the average fusion period was 3.7 months (2.00–6.00 months).
The targeting technique based on ultrasonographic examination can improve LIPUS treatment results of delayed union for humerus and femurs.
*Department of Traumatology, FUKUSHIMA Medical University (Trauma & Reconstruction Center, Southern TOHOKU General Hospital);
†Department of Orthopaedic Surgery, Teikyo University School of Medicine (Trauma & Recon-struction Center, Southern TOHOKU General Hospital); and
‡Department of Traumatology, FUKUSHIMA Medical University (Trauma & Reconstruction Centre, Southern TOHOKU General Hospital).
Accepted June 13, 2019