[Intra-osseous pressure in vascular injuries in femoral neck fractures].
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Pertrochanteric and femoral neck fractures are common in elderly patients. These fractures are mostly caused by domestic accidents. Femoral head necrosis and non-union are severe complications. Even if these fractures are not typical skiing-fractures, 101 fractures of the proximal femor were found to be caused by a skiing-accident. The age of the patients averaged 41 years, only one third were female. More than half of all patients participated in a control examination about one year after the accident. All fractures were operated according to the principles of the ASIF. The results showed twice an infection, in 3% dystrophia of the bone and in 3% mild osteoarthritis. There were no necroses of the femoral head, no non-union and no breaking of the implanted material. In 90% the results were good or excellent from the point of view of the patient as well as the orthopedic surgeon.
Over a long period of time the dislocated and unstable fracture of the femoral neck has been called "the unsolved fracture". Regardless of all technical improvement developed the head- and joint preserving treatment of this fracture seemed to remain an "unsolvable" problem. Fundamental reason for this discrediting judgement was the continuously high rate of complications like segmental collapse of the femoral head and pseudarthrosis of the femoral neck. The invention and speedy acceptance of hip joint replacement made many surgeons hope that the "unsolved" problems of treating femoral neck fractures could be guided to a definite conclusion. This revising discussion is done to bring home being familiar with the experience gained by practising the head- and joint preserving surgery of femoral fractures.
OBJECTIVES: To develop an intraoperative technique to predict the development of avascular necrosis after internal fixation of femoral neck fractures. DESIGN: Prospective study. SETTING: All patients were treated at the same hospital. PATIENTS/PARTICIPANTS: Sixty-four patients who presented for internal fixation of a femoral neck fracture were enrolled in the study. INTERVENTION: A 2.0-millimeter drill was used to assess the presence and character of bleeding from the femoral head at open reduction and internal fixation of a femoral neck fracture. MAIN OUTCOME MEASUREMENTS: Patients were evaluated postoperatively by history, examination, and roentgenography for the development of avascular necrosis of the femoral head fragment. A minimum two-year follow-up with radiography was required for entry into the study, with an average follow-up of 3.2 years. RESULTS: None of the fifty-six patients with bleeding from the drill holes in the femoral head fragment developed avascular necrosis. Eight of eight patients with no bleeding after reduction developed avascular necrosis. There were no infections or nonunions. CONCLUSIONS: Intraoperative drilling of the femoral head is a highly sensitive and specific predictor for the development of avascular necrosis after femoral neck fractures.
BACKGROUND: Cross-match practice for patients with femoral neck fractures continues to cause concern due to a failure of compliance to the existing protocols. To address this issue, a number of studies were conducted over a 3-year period. METHODS: First, the existing cross-match practice for patients admitted with femoral neck fractures was reviewed to demonstrate the deficiencies within the system. Second, the opinion of anaesthetic and orthopaedic trainees was assessed regarding blood requirements for different femoral neck fractures following surgery and the justification of their perceptions. RESULTS: A summation of the studies is reported which demonstrates the reasons for the poor compliance to previous protocols. CONCLUSIONS: A simple and effective protocol is provided that has helped reduce pre-operative cross-matching of femoral neck fractures from 71% to 16.7% when assessed 2 years after its introduction.
Between April 1992 and March 1994 Duo-cup endoprosthesis was inserted in 90 patients (mean age 80 years, 49-99 years) with fractures of the femoral neck, admitted to the Division of Trauma Surgery. University Hospital of Zürich, Switzerland. The purpose of this study was the clinical and radiological evaluation during a follow-up period of 3 to 24 months. The mechanism of trauma, pre-existing morbidity of the patients, operative stress and postoperative complications were analyzed retrospectively. The functional outcome of 75% of the patients was assessed according to a standardized protocol. In the follow-up, 85% of the patients showed good to excellent results. Radiolucent zones around the cement-bone interface were detected by x-ray scan in 7 patients without loosening of the prosthesis. In half of the patient group heterotopic ossifications appeared, but without clinical relevance. Complications appeared as followed: 3.3% superficial infections, 3.3% deep wound infections followed by replacement of the prostheses, 8.8% hematomas, 2.2% extraprothetic luxations. The perioperative lethality was 0%, whereas the lethality during hospitalisation was 2.2% and the average lethality of the first postoperative year 13%. Overall, 93% of the patients returned to their pre-existing housing environment. These results show that good to excellent clinical and functional results can be achieved in the treatment of femoral neck fractures with duo-cup prosthesis in elderly patients which enables the patients to return in their known social environment.
Femoral neck fracture in the case of a previously implanted ipsilateral tumour knee-prosthesis represents a challenging situation because of the long proximal stem of the knee implant. Avoiding total femur replacement, we implanted a femoral neck prosthesis (Eska Cut 2000) in a 65 year old patient to preserve as much of the femur free of implant as possible, minimizing the risk of a periprosthetic or interprosthetic fracture. At 2.5 years postoperatively, there were no signs of loosening, migration or periprosthetic fracture with a good functional result. In our case, the femoral neck prosthesis avoided the implantation of a total femur replacement. Nevertheless, this prosthesis must be considered critically and cannot be recommended as the standard implant for femoral neck fracture in the case of an ipsilateral long stem-knee prosthesis.
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