Domres B, Neugebauer W
Aktuelle Traumatol. 1980 Dec;10(6):307-10.
Bone fractures treated with an external fixator tend to heal more slowly than with an internal fixator, since the tension of the fixator gradually relaxes and this decrease in pressure is not counteracted on any way. A dynamometer makes possible an exact measurement of effective compressive forces and an adjustment of the tension of the fixator. A special feature of the apparatus is an elastic metal ring. The apparatus is mounted on the free ends of both tubes of the fixator for measuring and adjusting the tension. This should be done once a week. Supported fractures are put under an axial compression of 50 kp. In the case of comminuted and defect fractures, an axial compression of 5 kp should be begun after 5 weeks, and this dosage should be increased every week.
与使用内固定器治疗的骨折相比，使用外固定器治疗的骨折愈合往往更慢，因为固定器的张力会逐渐松弛，且这种压力降低无法以任何方式得到抵消。测力计能够精确测量有效压缩力并调整固定器的张力。该仪器的一个特殊部件是一个弹性金属环。该仪器安装在固定器两根管子的自由端，用于测量和调整张力。此操作应每周进行一次。支撑性骨折施加50千帕的轴向压缩力。对于粉碎性骨折和有缺损的骨折，5周后应开始施加5千帕的轴向压缩力，且该剂量应每周增加。
