Objective To find out some parameters to judge the stability of the wrists after four-corner arthrodesis and to explore the strategyfor improving the range of motion (ROM) of the wrist after four-corner arthrodesis. Methods After the simulated four-corner arthrodesis was performed in both wrists of 8 men and 4 women cadaver, the wrists were fixed on the wrist motor simulator; and wrist movement including flexion, extension, radial deviation, ulnar deviation was simulated. The standard posteroanterior and lateral radiographs were taken for measuring the change of capitolunate angle（α）, radiolunate angle（β）, capitolunate posteroanterior angle（θ）, the height（H）and width（W）of the fused four carpal bone bloc. Results There were statistically significant differences in α,β,θ angles (P＜0.01) in the case of 50° flexion or 40° extension, and in H and W values (P＜0.05) in the case of 25° ulnar deviation or 15° radial deviation when compared with before movement. Conclusion Capitolunate angle, radiolunate angle, capitolunate posteroanterior angle, the height and the width of thefused four carpal bone bloc can be used to judge the stability of the wrists after four-corner arthrodesis.
Objective To investigate the improved reduction technique for depression fractures of the lateral tibial plateau and its effectiveness. Methods Between January 2008 and December 2010, 48 patients (48 knees) with depression fractures of the lateral tibial plateau (Schatzker II or III fractures) were treated. There were 32 males and 16 females with an average age of 45.8 years (range, 16-79 years). All fractures were fresh closed fractures, which were caused by traffic accident in 27 cases, by falling from height in 5 cases, by crushing in 8 cases, and by sustained falls in 8 cases. According to Schatzker classification, 29 cases were classified as type II and 19 cases as type III. The lateral cortex was cut off to expose the depression and compacted cancellous bone was elevated to reset the articular surface. After reduction, autologous iliac bone graft and locking plate internal fixation were used. Results Healing of incision by first intention was achieved in all patients, and no complication occurred. All patients were followed up 1.7 years on average (range, 1-3 years). At last follow-up, the knee extension was ( — 0.5 ± 0.3)°, and the knee flexion was (136.9 ± 8.8)°. X-ray films showed that the fracture healing time was 52 weeks and no breakage of internal fixation occurred. According to Rasmussen clinical score, the results were excellent in 35 cases, good in 10 cases, and fair in 3 cases. According to Rasmussen radiographical score, the results were excellent in 41 cases, good in 7 cases; there were 41 excellent scores and 7 good scores of articular reduction; all gained good recovery of coronal and sagittal alignment and condylar width. The articular surface collapse was (1.0 ± 0.7) mm at immediate postoperatively and (1.2 ± 0.7) mm at last follow-up, showing no significant difference (t= — 1.42, P=0.20), but significant differences were found when compared with that at preoperation [(12.2 ± 8.0) mm, P lt; 0.05]. Conclusion This improved technique can provide a satisfactory effectiveness of fracture reduction and can avoid loss of reduction. The short-term effectiveness is good, but futher follow-up is necessary to determine the long-term results.
Transcatheter aortic valve replacement (TAVR) is a reasonable alternative for patients with severe aortic stenosis who are at a medium or high risk from surgery, and it’s gradually extended to low-risk groups. The safety of surgery is confirmed with the advancement of technology and the improvement of surgical instruments, but surgical complications are still common. Cardiovascular collapse is the leading cause of death during the surgery and not rare. This article reported a case of cardiovascular collapse during TAVR who were successfully rescued, while literature review on the causes and treatment of cardiovascular collapse were made.
ObjectiveTo compare the effectiveness of sequestrum clearance and impacting bone graft via surgical hip dislocation approach and core decompression and bone graft for avascular necrosis of the femoral head (ANFH) at Association Research Circulation Osseous (ARCO) stage Ⅲ.MethodsA clinical data of 60 patients (69 hips) of non-traumatic ANFH at ARCO stage Ⅲ, which met the inclusion criteria between October 2013 and April 2016, was retrospectively analyzed. Among them, 24 patients (28 hips) were treated with sequestrum clearance and impacting bone graft via surgical hip dislocation approach (group A); and 36 patients (41 hips) were treated with core decompression, sequestrum clearance, impacting bone graft, and nonvascular fibular allograft supporting (group B). There was no significant difference in gender, age, disease duration, affected side, type and stage of the ANFH, and preoperative Harris hip score and visual analogue scale (VAS) score between the two groups (P>0.05). After operation, the function of the hip was evaluated by Harris hip score, imaging examination was performed to observe the femoral head shape and evaluate whether the hip preserving success.ResultsThe incisions of two groups healed by first intention. All patients were followed up. The follow-up time was 12-48 month (mean, 25.8 months) in group A and 12-54 months (mean, 26.4 months) in group B. At last follow-up, 5 hips in group A were classified as clinical failure, femoral head survival rate was 82.1%, the median survival time was 43 months. While 19 hips in group B were classified as clinical failure, femoral head survival rate was 53.7%, the median survival time was 42 months. There was significant difference in survival curve distribution between the two groups (χ2= 4.123, P=0.042), and the surgical procedures of group A was superior to group B. In the two groups, the Harris hip scores at last follow-up were significantly higher than preoperative ones (P<0.05), and VAS scores were significantly lower than preoperative ones (P<0.05). There was no significant difference in Harris hip score and VAS score at last follow-up between the two groups (P>0.05). All grafted bones got fusion according to the X-ray films, and there was no significant difference in the fusion time between the two groups (t=0.752, P=0.456). In group A, greater trochanter bone cutting were healed well; and the heterotopic ossification around the hip joint occurred in 1 case.ConclusionThe surgery of impacting bone graft via surgical hip dislocation approach and core decompression and bone graft can be applied to treat ANFH at ARCO stage ⅢA which was mild collapse and satisfactory effectiveness can be obtained. While for the patients of ANFH at ARCO stage Ⅲ B with severe collapse, the hip survival rate of the former is better than that of the latter.
Transcatheter aortic valve replacement (TAVR) is the best treatment for severe aortic stenosis with high surgical risk, and low body weight significantly increased the risk of surgery and postoperative all-cause mortality. A case of elderly female diagnosed with severe aortic valve stenosis and extremely low body weight was presented in this article. Additionally, horizocardia and low located coronary orifice were also found in this patient, which markedly increased the risk and complexity of the TAVR procedure. During the operation, circulatory collapse occurred, and prosthetic valve was quickly released under emergency cardiopulmonary resuscitation. The operation was successful and the patient’s vital signs recovered soon. The follow-up showed that the patient was in good condition.
Objective To improve the knowledge on dynamic benign central airway stenosis through two typical cases. Methods The clinical features, imaging findings, and bronchial morphologic changes of two cases characterized by dynamic benign central airway stenosis were retrospectively analyzed. The etiologies for the two cases were tracheobronchomalacia (TBM) and excessive dynamic airway collapse (EDAC), respectively. Results Central airway stenosis and reversible airway obstruction were common clinical characteristics for the two cases. However, there were identifiable differences on imaging findings and bronchial morphologic changes between the two cases. Multidetector computed tomography showed sabre-sheath trachea and narrowed trachea in coronal position for TBM, while small sized trachea in exhalation phase and narrowed trachea in sagittal position for EDAC. Bronchoscopy displayed narrowed airway, swelling mucosa, and the absence of annular cartilage for TBM, while crescent airway with membranacea part protruding to lumen in inspiration phase, and the integrity of annular cartilage for EDAC. Conclusion Multidetector computed tomography and bronchoscopy examinations are valid methods to distinguish TBM and EDAC, which are both characterized by dynamic benign central airway stenosis.
ObjectiveTo investigate the classification and treatment strategies of symptomatic severe osteoporotic vertebral fracture and collapse. MethodsBetween August 2010 and January 2014, 42 patients with symptomatic severe osteoporotic vertebral fracture and collapse were treated, and the clinical data were retrospectively analyzed. According to clinical symptom and imaging materials, 23 cases were classified as type I (local pain, limitation of motion, no neurological symptom, and no obvious deformity), 12 cases as type II (slight neurological symptom and kyphotic Cobb angle ≤ 30°), and 7 cases as type III (severe neurological symptom and kyphotic Cobb angle <30°). In 23 type I patients, 17 underwent percutaneous vertebral augmentation, 6 underwent posterior pedicle screw fixation strengthened with bone cement combined with percutaneous vertebral augmentation. In 12 type II patients, they were treated with local spinal decompression and internal fixation strengthened with bone cement. In 7 type III patients, 5 underwent posterior osteotomy, and 2 underwent one stage posterior approach of vertebral resection and reconstruction. The visual analogue scale (VAS), Oswestry disability index (ODI), and local kyphotic Cobb angle were used to evaluate the neurological function. The complications were recorded. ResultsThe operation was successfully completed in all patients. Wound infection and ketoacidosis secondary to stress blood glucose rise occurred in 1 case of type III patients respectively, and were cured after corresponding treatment; primary healing of wound was obtained in the other patients. The patients were followed up from 6 to 36 months (mean, 11.6 months). The nerve function was improved in 17 cases, and micturition disability was observed in 2 cases. Asymptomatic cement leakage occurred in 13 cases (30.95%) (7 cases in type I, 4 cases in type II, and 2 cases in type III). No bone cement dislocation and internal fixation failure were found during follow-up. The VAS score, ODI, and the local kyphotic Cobb angle at 1 week and last follow-up were significantly improved when compared with preoperative ones (P<0.05), but no significant difference was found between at 1 week and last follow-up (P>0.05). ConclusionIn order to improve the effectiveness and reduce the risk and complications of operation, individualized strategies should be performed according to different types of severe osteoporotic vertebral fracture and collapse.
Objective To explore the effectiveness of limited incision, poking reduction, and simple internal fixation in the treatment of collapsed fractures of the posterolateral tibial plateau. Methods Between October 2010 and January 2016, 16 patients with collapsed fractures of the posterolateral tibial plateau underwent posterolateral incision, poking reduction, and simple internal fixation. There were 10 males and 6 females with the age of 22-63 years (mean, 43.5 years). The injury was caused by falling in 5 cases, traffic accident in 7 cases, and falling from height in 4 cases. All cases had closed fractures. The left knee was involved in 9 cases and the right knee in 7 cases. The injury-to-admission time was 2 hours to 3 days (mean, 10 hours). X-ray films showed that the articular surface collapsing was more than 2 mm. According to Schatzker criteria, 6 cases were rated as type II and 10 cases as type III. Twelve cases had fracture of fibular head. The incision length, operation time, intraoperative blood loss, and incision healing were recorded; fracture healing was observed, and tibial plateau angle and posterior slope angle were measured on X-ray films; loss of articular surface reduction was observed by CT scan; and American Hospital for Special Surgery (HSS) score was used to evaluate the knee joint function. Results The incision length was 7-10 cm (mean, 8.6 cm); operation time was 35-55 minutes (mean, 46 minutes); intraoperative blood loss was 10-35 mL (mean, 28 mL). Primary healing of incision was obtained. Skin pain occurred in 1 case at 2 months because Kirschner wire retracted. Fifteen cases were followed up 8-21 months (mean, 13.5 months). The fracture healing time was from 3 to 6 months (mean, 4.8 months). There was no significant difference in tibial plateau angle and posterior slope angle between at immediate after operation and at last follow-up (t=–1.500, P=0.156; t=–1.781, P=0.097). The anatomic reduction rate of articular surface was 93.8% (15/16) at immediate after operation. At last follow-up, the recollapse height of articular surface was 0.1-1.2 mm (mean, 0.36 mm). According to the HSS score system, the results were excellent in 12 cases, good in 2 cases, and fair in 1 case, and the excellent and good rate was 93.3%. Conclusion The limited incision by posterolateral approach, poking reduction, and simple internal fixation have the advantages of small injury, full exposure, and easy operation in the treatment of simple posterolateral tibial plateau fractures; bone graft support and simple internal fixation can prevent recollapse of the articular surface and achieve satisfactory knee function.
Objective To summarize surgical procedures of hip-preservation based on peri-collapse stage of osteonecrosis of the femoral head (ONFH). Methods The basic points of peri-collapse stage theory was expounded. The related literature on surgical procedures was summarized and analyzed based on the theory. Results Surgical procedures of hip-preservation tend to emphasize on mechanical repair, giving consideration to biological repair. It is consistent with the essence of peri-collapse stage theory, which attaches great importance to biomechanical stability. Conclusion Peri-collapse stage theory has a guiding significance to the choice of surgical timing and approach, and it is one of the important theoretical basis for hip-preservation treatment.
ObjectiveTo explore the predictive effect of the femoral neck strength composite indexes on femoral head collapse in non-traumatic osteonecrosis of the femoral head (ONFH) compared with bone turnover marker.MethodsThe non-traumatic ONFH patients who were admitted and received non-surgical treatment between January 2010 and December 2016 as the research object. And 96 cases (139 hips) met the selection criteria and were included in the study. There were 54 males (79 hips) and 42 females (60 hips), with an average age of 40.2 years (range, 22-60 years). According to whether the femoral head collapsed during follow-up, the patients were divided into collapsed group and non-collapsed group. The femoral neck width, hip axis length, height, body weight, and bone mineral density of femoral neck were measured. The femoral neck strength composite indexes, including the compressive strength index (CSI), bending strength index (BSI), and impact strength index (ISI), were calculated. The bone turnover marker, including the total typeⅠcollagen amino terminal elongation peptide (t-P1NP), β-crosslaps (β-CTx), alkaline phosphatase (ALP), 25 hydroxyvitamin D [25(OH)D], and N-terminal osteocalcin (N-MID), were measured. The age, gender, height, body weight, body mass index (BMI), bone mineral density of femoral neck, etiology, Japanese Osteonecrosis Investigation Committee (JIC) classification, femoral neck strength composite indexes, and bone turnover marker were compared between the two groups, and the influencing factors of the occurrence of femoral head collapse were initially screened. Then the significant variables in the femoral neck strength composite indexes and bone turnover marker were used for logistic regression analysis to screen risk factors; and the receiver operating characteristic (ROC) curve was used to determine the significant variables’ impact on non-traumatic ONFH. ResultsAll patients were followed up 3.2 years on average (range, 2-4 years). During follow-up, 46 cases (64 hips) had femoral head collapse (collapsed group), and the remaining 50 cases (75 hips) did not experience femoral head collapse (non-collapsed group). Univariate analysis showed that the difference in JIC classification between the two groups was significant (Z=–7.090, P=0.000); however, the differences in age, gender, height, body weight, BMI, bone mineral density of femoral neck, and etiology were not significant (P>0.05). In the femoral neck strength composite indexes, the CSI, BSI, and ISI of the collapsed group were significantly lower than those of the non-collapsed group (P<0.05); in the bone turnover marker, the t-P1NP and β-CTx of the collapsed group were significantly lower than those of the non-collapsed group (P<0.05); there was no significant difference in N-MID, 25(OH)D or ALP between groups (P>0.05). Multivariate analysis showed that the CSI, ISI, and t-P1NP were risk factors for femoral collapse in patients with non-traumatic ONFH (P<0.05). ROC curve analysis showed that the cut-off points of CSI, BSI, ISI, t-P1NP, and β-CTx were 6.172, 2.435, 0.465, 57.193, and 0.503, respectively, and the area under the ROC curve (AUC) were 0.753, 0.642, 0.903, 0.626, and 0.599, respectively. ConclusionThe femoral neck strength composite indexes can predict the femoral head collapse in non-traumatic ONFH better than the bone turnover marker. ISI of 0.465 is a potential cut-off point below which future collapse of early non-traumatic ONFH can be predicted.