ObjectiveTo design a new type of short femoral intertrochanteric nail (FITN) with anterior curvature (19.5 cm in length and 120 cm in radius) and observe the geometric match with medullary cavity of the femur. MethodsBetween November 2015 and June 2016, 25 geriatric patients with femoral intertrochanteric fractures were treated with the newly designed FITN. There were 7 males and 18 females with an average age of 82.3 years (range, 65-94 years). According to AO/OTA fracture classification, 3 cases were rated as A1.2, 2 cases as A1.3, 5 cases as A2.1, 8 cases as A2.2, and 7 cases as A2.3. The interval between injury and operation was 3.2 days (range, 2-7 days). Postoperatively, the nail entry point position (anterior, central, and posterior) on sagittal plane, the nail tip position (6-grade scale) and the nail tail level (3-grade scale) were measured using fluoroscopy and X-ray films to evaluate the geometric match of the nail with medullary cavity of the femur. ResultsOne patient with Parkinson disease died of asphyxia and pulmonary infection. The other 24 patients were followed up 1-8 months (mean, 4 months). Fracture union time was 6-10 weeks (mean, 8 weeks). The mean Parker-Palmer mobility score was 5.5 (range, 4-8). No patient had hip-thigh pain. The nail entry point was positioned anterior in 2 cases (8%), central in 18 cases (72%), and posterior in 5 cases (20%). The distal nail tip located at the central canal axis (grade 0) in 15 cases (60%), at anterior without contact with the anterior inner cortex (grade 1) in 8 cases (32%), at posterior (grade -1) in 1 case (4%), and at anterior with slight nail-tip impingement with the anterior cortex (grade 2) in 1 case (4%). The proximal nail tail level did not protrude out beyond the greater trochanter (grade 0) in 13 cases (52%), protruded out less than 5 mm (grade 1) in 9 cases (36%), and more than 5 mm (grade 2) in 3 cases (12%). ConclusionThe newly designed FITN has a good geometric match with the femur medullary canal in Chinese population, which may reduce the nail related complications.
ObjectiveTo investigate the application effect of wire reduction technique guided by minimally invasive wire introducer in the treatment of difficult-reducing intertrochanteric fractures.MethodsBetween April 2016 and April 2018, 30 patients with intertrochanteric fractures who had difficulty in closed reduction under the traction bed were treated. There were 17 males and 13 females, aged from 60 to 93 years (mean, 72 years). The causes of injury included falls in 22 cases and traffic accidents in 8 cases. The fractures were classified according to AO/Orthopaedic Trauma Association (AO/OTA) classification: 12 cases of type A1, 12 cases of type A2, and 6 cases of type A3. Intramedullary nail incision and self-made minimally invasive wire introducer were used to assist reduction of intertrochanteric fracture, and then intramedullary nail internal fixation was performed.ResultsThe operation time was 30-70 minutes, with an average of 45 minutes. The intraoperative blood loss was 100-210 mL, with an average of 160 mL. One case died of cerebrovascular accident at 3 months after operation; the remaining 29 cases were followed up 6-18 months, with an average of 8.3 months. Postoperative DR reexamination showed that all patients had a good reduction in the fracture end, no retraction, fracture displacement, hip valgus deformity, and other serious complications occurred. The fracture was completely healed and the healing time was 3-8 months, with an average of 6 months. At 3 months after operation, the visual analogue scale (VAS) score was 1-3, with an averge of 1.7. According to Harris functional score of hip joint, 26 cases were excellent and 3 cases were good.ConclusionFor the difficult-reducing intertrochanteric fractures, minimally invasive wire introducer is used to insert steel wire into the incision of head and neck nail for assisted reduction, which can achieve satisfactory reduction results and improve the effectiveness of intertrochanteric fracture.
Objective To investigate the appl ication of anti-rotation screw after dynamic hi p screw (DHS) in treatment of intertrochanteric fracture. Methods Between April 2006 and January 2010, 22 cases of intertrochanteric fractures underwent DHS fixation operation with an anti-rotation screw, including 15 males and 7 females with an average ageof 66.3 years (range, 54-83 years). Fractures were caused by sl ipping in 16 cases, traffic accident in 5 cases, and fall ing from height in 1 case. All cases showed closed fractures, including 13 cases in the left and 9 cases in the right. Eighteen cases were simple intertrochanteric fracture, 4 cases were intertrochanteric fractures compl icated with Colles fractures. According to Evans classification standard, there were 14 cases of type I, 6 cases of type II, 1 case of type III, and 1 case of type IV. The time from wound to operation was 3-7 days (mean, 4.5 days). Results The operation time ranged from 51-95 minutes (mean, 72 minutes). The intraoperative blood loss was 150-350 mL (mean, 270 mL). The hospital ization days were 12-35 days (mean, 16.8 days). Primary heal ing was observed in all cases. All cases were followed up 6-17 months (mean, 14 months). Union of fracture was observed at 12-16 weeks (mean, 13.6 weeks); no fracture or internal fixation loosening occurred. According to HUANG Gongyi’s standard of efficacy assessment, the results were excellent in 19 cases and good in 3 cases. Conclusion Appl ication of an anti-rotation screw can help to improve the strength of the DHS for the internal fixation of intertrochanteric fracture, especially the anti-rotation abil ity, which does not increase the operation time obviously.
Objective To compare the biomechanical characteristics of the less invasive stabilization system (LISS) and the dynamic condylar screw (DCS) in the fixation of subtrochanteric fractures of the femur so as to provide theoretical basis for choosing internal fixator in clinical application. Methods Twelve cadaveric human femurs (35-50 years old) were selected with similar proximal femur, excluding deformities, fractures, and other lesions. The twelve femur specimens were randomly divided into 2 groups, 6 specimens per group. An 1 cm gap of osteotomy model was made in the proximal femur up to 1 cm below the lesser trochanter to simulate a comminuted subtrochanteric fracture of femur, and the distal end was embedded with denture acrylic and liquid for denture acrylic. Fracture was fixed by LISS in group A, and was fixed by DCS in group B. The specimens were fixed on Instron-8874 servo-hydraulic mechanical testing machine in a single-leg standing position, and the axial compression test and dynamic fatigue test were carried out to compare the compressive strength and the strain distribution at both sides of the fracture line. Results Axial compression test: the strain values of the 2 strain gauges in group A were significantly smaller than those in group B (P lt; 0.01); the vertical down displacement of the femoral head in group A was significantly smaller than that in group B (P lt; 0.01) under the same load; when the load was 600 N, the axial rigidity of group A was (209.06 ± 18.63) N/mm, which was significantly higher than that of group B [(65.79 ± 7.26) N/mm] (t=3.787, P=0.004). Dynamic fatigue test: the vertical down displacement of the femoral head in group A was significantly smaller than that in group B in the same cyclic loading cycle (P lt; 0.01); when the vertical down displacement of the femoral head was 0.5 mm, the force and the cyclic loading cycles in group A were significantly larger than those in group B (P lt; 0.01). Conclusion LISS, which has good mechanical stability, can meet the requirements for subtrochanteric fracture of femur fixation in biomechanics and anatomical structures. It can be proven that the LISS internal fixator is firmer than the DCS internal fixator by biomechanical comparison.
Objective To summarize the new research progress in distal interlocking screws of cephalomedullary nails for the treatment of intertrochanteric fractures. Methods Relevant domestic and foreign literature was extensively reviewed to summarize the static/dynamic types of distal interlocking screw holes, biomechanical studies, clinical studies and application principles, effects on toggling in the cavity, and related complications of distal interlocking screws.ResultsThe mode of the distal interlocking screw holes can be divided into static and dynamic. Distal interlocking screws play the role of anti-rotation, maintaining femur length, resisting compression stress, increasing torque stiffness, resisting varus stress, etc. The number of the screws directly affects the toggling of the main nail in the cavity. At present, regardless of whether long or short nails are used, distal interlocking screws are routinely inserted in clinical practice. However, using distal interlocking screws can significantly increase the duration of anesthesia and operation, increase fluoroscopy exposure time, surgical blood loss, and incision length. There is a trend of trying not to use distal interlocking screws in recent years. No significant difference is found in some studies between the effectiveness of dynamic and static interlocking for AO/Orthopaedic Trauma Association (AO/OTA) 31-A1/2 fractures. At present, the selection of the number and mode of distal interlocking screws is still controversial. When inserting distal interlocking screws, orthopedists should endeavor to minimize the occurrence of complications concerning miss shot, vascular injuries, local stress stimulation, and peri-implant fractures. Conclusion Distal interlocking screws are mainly used to prevent rotation. For stable fractures with intact lateral walls, long cephalomedullary nails can be used without distal interlocking screws. For any type of intertrochanteric fractures, distal interlocking screws are required when using short cephalomedullary nails for fixation. Different interlocking modes, the number of interlocking screws, and the application prospects of absorbable interlocking screws may be future research directions.
Objective To study the effectiveness of anterolateral C-shaped approach in the treatment of intertrochanteric fracture of the femur in elderly patient by comparing with traditional anterolateral approach. Methods Between April 2010 and November 2011, 66 patients with intertrochanteric fracture of the femur were analyzed retrospectively. Of 66 patients, 37 underwent improved anterolateral C-shaped approach combined with fixation of dynamic hip screw (DHS) (improved group), and 29 underwent traditional anterolateral approach combined with fixation of DHS (conventional group). There was no significant difference in gender, age, injury cause, side, disease duration, fracture type, and complication between 2 groups (P gt; 0.05). The operation time, intraoperative blood loss, postoperative drainage volume, and hospitalization time were recorded; and X-ray films were taken to observe the fracture healing. The hip function was evaluated according to self-established criterion. Results The operation was successfully completed in all patients, and primary healing of incision was achieved. All patients were followed up 12-24 months (mean, 17.8 months). Bone union was achieved in both groups; the fracture healing time was 3-6 months (mean, 4.8 months). No loosening or breaking of internal fixation was observed during follow-up period. The operation time and postoperative drainage volume of improved group were significantly less than those of conventional group (P lt; 0.05); no significant difference was found in intraoperative blood loss and hospitalization days between 2 groups (P gt; 0.05). According to self-established criterion, improved group was significantly better than conventional group in recovery of hip joint motion and function at 6 and 12 months after operation (P lt; 0.05). Conclusion Anterolateral C-shaped approach combined with DHS could minimize muscle injury and scar formation, which is beneficial to surgical exposure and early postoperative rehabilitation.
ObjectiveTo explore the effectiveness of minimally invasive clamp reduction technique via anterior approach in treatment of irreducible intertrochanteric femoral fractures.MethodsBetween January 2015 and January 2019, 59 patients with irreducible intertrochanteric femoral fractures were treated with minimally invasive clamp reduction technique via anterior approach. There were 29 males and 30 females with an average age of 77.9 years (range, 45-100 years). The causes of injury included falling in 46 cases, traffic accident in 6 cases, smashing in 2 cases, and falling from height in 5 cases. The time from injury to operation was 1-14 days (mean, 3.8 days). The fractures were classified as AO type 31-A1 in 12 cases, type 31-A2 in 25 cases, type 31-A3 in 22 cases.ResultsAll fractures were reduced well and the fracture reduction took 10 to 30 minutes, with an average of 19 minutes. All patients were followed up 13-25 months, with an average of 17.6 months. Among them, 2 cases of pronation displacement of proximal fracture segment died for infection or falling pneumonia after internal fixation failed. Six patients with reversed intertrochanteric femoral fractures experienced re-pronation and abduction displacement of the lateral wall after internal fixation, but the fractures all healed. The rest of the patients had no fracture reduction loss, and the fractures healed with an average healing time of 5.9 months (range, 3-9 months). Except for 2 patients who died, the Harris score of hip joint function of the remaining 57 patients was excellent in 49 cases and good in 8 cases at last follow-up.ConclusionThe minimally invasive clamp reduction technique via anterior approach for irreducible intertrochanteric femoral fractures is simple and effective. For irreducible intertrochanteric femoral fractures related to lateral wall displacement, after clamp reduction and intramedullary nail fixation, the lateral wall should be reinforced in order to avoid reduction loss and internal fixation failure.
ObjectiveTo investigate the morphology of coronal femoral intertrochanteric fracture and its effect on reduction and internal fixation.MethodsThe clinical and imaging data of 46 patients with femoral intertrochanteric fracture who met the selection criteria between August 2017 and October 2018 were reviewed. There were 15 males and 31 females; the age ranged from 62 to 91 years, with an average of 72.8 years. The causes of injury included walking falls in 35 cases, falling out of bed in 4 cases, and traffic accidents in 7 cases. The AO/Orthopaedic Trauma Association classification was type 31-A1 in 11 cases and type 31-A2 in 35 cases. All patients underwent closed reduction and internal fixation with intramedullary nails. During the operation, fracture reduction and fixation were performed according to the preoperative evaluation results. According to the patients’ preoperative X-ray film and CT three-dimensional reconstruction images, the direction of the coronal fracture line of the femoral intertrochanter and the morphological characteristics of the fracture block were observed; and the coronal fracture discrimination analysis was carried out for the fractures of different AO/OTA types. The percentages of coronal femoral intertrochanteric fractures diagnosed by preoperative X-ray film and CT three-dimensional reconstruction were calculated and statistically analyzed. The fracture reduction, the position of internal fixation [measurement of tip-apex distance (TAD)]. and the reliability of internal fixation were observed after operation.ResultsX-ray film was not easy to identify coronary fracture, and the coronal fracture line and the shape of the fracture piece weree clearly visible in CT three-dimensional reconstruction images. The morphological characteristics of the coronary fracture block: in AO/OTA 31-A1 type, the fracture line extended obliquely backward from the anterior tip of the large rotor, above the small rotor with or without small rotor fracture; in AO/OTA 31-A2 type, fracture line extended obliquely backward from the anterior tip of the large rotor to below the small rotor. Thirteen cases (28.3%) of coronal fractures were found on preoperative X-ray films, and 35 cases (76.1%) were found by CT three-dimensional reconstruction, showing significant difference (χ2=21.083, P=0.000). In AO/OTA 31-A1 type patients, the proportion of coronal fractures found by X-ray film and CT three-dimensional reconstruction was 18.2% (2/11) and 54.5% (6/11), respectively, and that in AO/OTA 31-A2 type patients was 31.4% (11/35) and 82.9% (29/35), respectively, showing significant differences (χ2=3.143, P=0.000; χ2=20.902, P=0.000). Among the 35 patients with coronal fractures, 6 cases (17.1%) of AO/OTA 31-A1 type, 29 cases (82.9%) of AO/OTA 31-A2 type. The operation time of the patient was 80-112 minutes, with an average of 95 minutes; the intraoperative blood loss was 180-450 mL, with an average of 360 mL. There was no complication such as infection, falling pneumonia, and deep vein thrombosis of the lower extremities. At 3 days after operation, the internal fixators were all in the proper position. The TAD was 0.9-1.8 cm, with an average of 1.4 cm. All patients were followed up 14-18 months, with an average of 16 months. All the fractures healed osseously, and there was no complication such as nonunion and loosening of internal fixation.ConclusionCT three-dimensional reconstruction can better identify coronal femoral intertrochanteric fractures than X-ray films, and accurately recognize and analyze the incidence and morphological characteristics of coronal fractures, which can help formulate more effective surgical strategies to promote patient recovery.
ObjectiveTo evaluate the effectiveness of Othofix pertrochanteric fixator for fixation of intertrochanteric fracture. MethodA retrospective analysis was made on the clinical data from 36 cases of intertrochanteric fracture treated with Othofix pertrochanteric fixator (OPF group) and 47 cases treated with Gamma nail (Gamma group) between October 2012 and March 2015. There was no significant difference in gender, age, cause of injury, side, AO fracture classification, combined medical disease, and injury to operation time between 2 groups (P>0.05) . The operation time, intraoperative blood loss, hospitalization time, fracture union time, and complication rate were recorded and compared between 2 groups. Hip function was evaluated with Sanders post-trauma criteria. ResultsThe operation time, intraoperative blood loss, and hospitalization time of the OPF group were significantly less than those of the Gamma group (P<0.05) . All the cases were followed up 6-12 months (mean, 8.8 months) in 2 groups. Healing of incision by first intention was obtained. Bone union was achieved in 2 groups, and the fracture union time of the OPF group was significantly shorter than that of the Gamma group (t=14.780, P=0.000) . There was no deep wound or pin track infection in 2 groups. Superficial skin reactions developed around the screw and the pins in 14 cases (38.9%) of the OPF group, but no incision infection in the Gamma group, showing significant difference (χ2=22.010, P=0.001) . Mild varus of the hip and pin cutting-out occurred in 3 cases (8.3%) and 2 cases (5.6%) of the OPF group, and in 4 cases (8.5%) and 3 cases (6.4%) of Gamma group, showing no significant difference (χ2=0.001, P=0.960; χ2=0.025, P=0.830) . According to Sanders post-trauma criteria, the results were excellent in 16 cases, good in 15 cases, fair in 3 cases, and poor in 2 cases, with an excellent and good rate of 86.1% in the OPF group; the results were excellent in 22 cases, good in 20 cases, fair in 4 cases, and poor in 1 case, with an excellent and good rate of 89.4% in the Gamma group; and there was no significant difference (χ2=0.200, P=0.610) . ConclusionsThe Othofix pertrochanteric fixator has good effectiveness in the treatment of intertrochanteric fracture, which has the advantages of simple operation, less operation time, little bleeding, and early functional recovery.
摘要:目的:探討老年人股骨粗隆間骨折不同手術方式的選擇。方法:我院2004年1月至2007年12月間應用不同術式治療老年股骨粗隆間骨折110例,其中動力髖螺釘(DHS)25例, 股骨近端髓內釘(PFN)41例,人工股骨頭置換44例。術后所有患者均獲隨訪,平均12.6個月。對術后并發癥和按照Kuderna 改良 Merli D’Aubigne標準得到的髖關節功能恢復優良數(率)進行評價。結果:術后出現并發癥3例,其中PFN術式2例;人工股骨頭置換術式1例。圍手術期內無傷口感染,無死亡病例。三種術式總體優良數(率)為:107(97.3%)。結論:三種手術方式各有其優缺點,沒有一種術式能普遍適用于各種類型粗隆間骨折,臨床上,為了最大限度降低手術風險,我們沒有必要專注或偏好于某一種手術方式,要根據患者的個體差異及每種術式的優缺點,靈活地為每例股骨粗隆間骨折患者制定出其最適宜的手術方式,大都能取得滿意的療效。Abstract: Objective: To investigate the chosen of 3 different surgical methods in the treatment of intertrochanteric femoral fractures in the elderly. Methods:From January, 2004 to December, 2007, 110 cases with the femoral intertrochanteric fractures in the elderly were treated with the followed 3 kinds of operations respectively:dynamic hip screw (25 cases), proximal femoral nail (41 cases), hip hemiarthroplasty (44 cases). After surgery all patients were followed up; Followedup period range from 6 months to 18 months(average 12.6 months). The good and excellent number (rate) of 3 surgical methods with Merli D’Aubigne evaluation criteria were evaluated, and compared in the postoperative complications. Results: 3 complications occurred postoperatively ( 2 with PFN,1 with hip hemiarthroplasty), none wound infection or died in Perioperatie. The total good successful number (rate) was 107(97.3%). Conclusion:Each has its advantages and its disadvantages. None of three kinds of surgical methods can be used generally all kinds of the femoral intertrochanter fracture. In clinical work, we don not need to focus on or prefer to the only one of them in order to minimize the risk. The good response to treatment will be get if we can choose the appropriate method according to the individual differences of the advantages and disadvantages of each method.