Barquet A, Massaferro J, Dubra A, Milans C, Castiglioni O
University Clinic, Insurance Bank Medical Center, Montevideo, Uruguay.
Injury. 1992;23(7):461-6. doi: 10.1016/0020-1383(92)90064-y.
The dynamic ASIF-BM external fixator incorporates telescopic tubes for axial dynamization and angled bayonet screws to keep the tubes parallel to the bone axis, that is essential for gliding, and adjustment of rotation. The results after treatment of 70 type II and III open tibial fractures with static ASIF and dynamic ASIF-BM frames were analysed. Of the fractures, 32 were treated with the delta ASIF static frame, the other 38 with delta and uniplanar dynamic ASIF-BM frames. The groups were found to be comparable. The results of the study confirm that tubular external fixation is a safe method for treating the bone and soft tissue lesions in such fractures. The comparative study shows that axial compression, using the ASIF-BM device, with early weight bearing, gave a higher rate of union (97 per cent against 87 per cent with the ASIF frame), a shorter healing time (19 weeks against 29 weeks with the ASIF frame) and a decreased need for bone grafting (21 per cent against 84 per cent with the ASIF frame). The incidence of pin track infection was also decreased in dynamic frames. Thus it seems that the ASIF-BM dynamic fixator has a valuable part to play as a definitive mode of therapy for severe open fractures of the tibial shaft.
动力型ASIF-BM外固定器采用可伸缩的套管进行轴向动力化，并使用成角度的卡口螺钉使套管与骨轴平行，这对于滑动和旋转调整至关重要。分析了使用静态ASIF和动力型ASIF-BM框架治疗70例II型和III型开放性胫骨骨折后的结果。其中32例骨折采用三角ASIF静态框架治疗，另外38例采用三角和单平面动力型ASIF-BM框架治疗。发现两组具有可比性。研究结果证实，管状外固定是治疗此类骨折的骨和软组织损伤的一种安全方法。对比研究表明，使用ASIF-BM装置进行轴向加压并早期负重，愈合率更高（97%，而ASIF框架为87%），愈合时间更短（19周，而ASIF框架为29周），骨移植需求减少（21%，而ASIF框架为84%）。动力型框架的针道感染发生率也有所降低。因此，ASIF-BM动力型固定器似乎作为胫骨干严重开放性骨折的一种确定性治疗方式具有重要作用。
