Use of the Hoffmann external fixator in the treatment of femoral fractures.

The Hoffmann external fixator has proved to be an effective means of stabilizing complex femoral fractures in patients in whom prolonged traction or internal fixation is not advisable. It provides for the prompt mobilization of multiple-trauma victims and assists in the evaluation of the "floating knee." Pin tract infections and lack of stability or adaptability of the frame are not major problems. Increased risks of delayed union or nonunion are often attributed to this mode of therapy. Within the limits of the present study these difficulties could not be directly related to the use of the fixator. In four patients nonunions were not unexpected and could have occurred with any form of therapy. Improved results may be achieved by earlier recognition of situations in which healing potential is compromised so that bone grafts may be applied at an early stage for prevention of nonunion.