[Objective]To measure the verus inclination of the proximal tibial of young Chinese through radiographs and determine how many degrees should the femoral prothesis be externally rotationed during total knee arthroplasty(TKA).[Method]Standardized anteroposterior radiographs of the entire lower legs of 200 volunteers' were taken. Two angles were measured as followes:Angle PT: angle between tibial articular margins and a line perpendicular to the tibial mechanical axis;Angle FT:angle between the transcondylar tangent anda line perpendicular to the tibial mechanical axis. [Result]Angle PT has a mean value of 4.06? and Angle FT is 5.00?. [Conclusion]When the posterior condylar axis is used during TKA for Chinese, the femoral prothesis should be externally rotationed 5.00? to get the optimum rotational orientation.

Objective:To observe the correlation analysis between the deep-superficial flow-density ratio (DSFR) and treatment response of macular edema secondary to branch retinal vein occlusion (BRVO).Methods:Forty-eight patients (48 eyes) with macular edema secondary to BRVO from December 2018 to December 2019 in the Department of Ophthalmology of Beijing Hospital were enrolled in this study. There were 29 males (29 eyes) and 19 females (19 eyes), with the mean age of 58.77±10.88 years. All eyes were treated with intravitreal injection of ranibizuma once a month for 3 months, and then treated as needed. According to the central retinal thickness (CRT) 12 months after treatment, the patients were divided into good response group (CRT≤250 μm) and refractory group (CRT> 250 μm). The flow density in the superficial capillary plexus (SCP) and deep capillary plexus (DCP) of all subjects was measured by optical coherence tomography angiography. The flow density of DCP and SCP measured at 3 follow-up times was selected and DSFR was calculated. The DSFR was recorded by the Study for the Treatment of Diabetic Retinopathy (ETDRS) -grid and Nine-grid. The flow density of DCP, SCP and DSFR were compared between the two groups by paired t test. At 3 months post-treatment, the efficacy of DSFR in ME treatment response was evaluated according to area under curve (AUC) of receiver operating characteristic. Univariate and multivariate binary logistic regression were used to analyze the factors affecting the response to ME treatment. Results:At 12 months after treatment, there were 27 eyes in good response group and 21 eyes in refractory group. There was no statistical significance in the flow density of DCP ( t=1.804, 1.064, 0.660) and SCP ( t=0.581, 0.641, 0.167) and DSFR ( t=0.393、-0.553、0.474) in all area of response group and refractory group using ETDRS-GRID recording method ( P>0.05). The SCP, DCP and DSFR of the most severe non-perfusion area were (27.10±5.70) %, (28.33±8.95) %, 1.35±0.54 and (27.54±6.70) %, (29.11±0.42) %, 1.01±0.40 in the response group and refractory group, respectively. There was no significant difference in the flow density of DCP and SCP between the two groups ( t=-0.237,-0.340; P>0.05). The difference of DSFR between two groups was statistically significant ( t=2.288, P=0.024). Univariate and multivariate binary logistic regression analysis showed that DSFR in the most severe non-perfusion area was associated with ME response (odds ratio=0.212, 0.085; P=0.027, 0.024). The AUC was used to evaluate the efficacy of DSFR in ME treatment response, the results showed that the AUC was 0.800, P=0.001, Youden index was 1.348, sensitivity was 67.7%, and specificity was 86.7%. Conclusions:DSFR reduction is more common in BRVO secondary to ME patients. DSFR correlates with ME treatment response.

0.05). Conclusion Compared with the Whiteside′s line, the transepicondylar axis seems to be more reliable to determine the rotational alignment of femoral component in total knee arthroplasty. The posterior femoral condylar angle of the Chinese people is larger than that of the Caucasians. If the widely used way of 3? lateral rotational orientation of the femoral component referring to the posterior condylar surfaces of the femur in total knee arthroplasty is adopted, it tends to produce internal malrotation of the femoral prosthesis after operation.

Objective To compared the posterior slop between tibial plateau and meniscus in Chinese population for determining the angle of tibial osteotomy during total knee replacement(TKA).Methods Posterior slop of tibial plateau and meniscus in sixty Chinese volunteers were measured on sagital view of MRI image.Results The values of posterior slop of tibial plateau and meniscus were 9.87??1.56?and 0.96??0.09?,respectively.The two angle revealed remarkable difference (P

Objective To introduce a new classification system for femoral intertrochanteric fractures and propose classification to assist surgical management.Methods A total of 176 cases of femoral intertrochanteric fractures treated from September 2007 to October 2011 were enrolled in the study.X-ray and three-dimensional spiral CT reconstruction were performed to define fracture shape,location,number of major fragments and displaced direction.As combined with the intraoperative findings and cadaveric anatomical study,the femoral intertrochateric fractures was simulated using a three-dimensional entity of normal proximal femur produced by Mimics 11.1 program.A new classification system for femoral intertrochateric fractures was proposed.Results The new system categorized intertrochateric fractures of the femur into five types (Type Ⅰ,Type Ⅱ,Type Ⅲ,Type Ⅳ and Type Ⅴ) based on the integrity or destruction of the medial column,lateral column and posterior column set and divided on the basis of bone connection of femoral head-neck fracture fragments with the bone in intertrochanteric region.Conclusions The new classification system with introduction of three-column concept is brief and practical and has a clear definition of fracture stability.Besides,the new classification-based treatment is recommended.

Objective:To study the effect of BuShen Prescription on metabolism of collagen Ⅰ in ovariectomized rats,which will provide experimental evidence for treating osteoporosis. Methods:50 Ovariectomized SD rats were randomLy divided into 5 groups,including normal control group,model group,positive control (OVX) group,Zuogui Wan group and Yougui Wan group,each group with 10 rats. After 12 weeks' routine feed,normal control group and model group were intragastric administrated with pure water,positive control group was intragastric administrated with conjugated estrogens water-solution,Zuogui Wan group was intragastric administrated with Zuogui Wan decoction,and Yougui Wan group was intragastric administrated with Yougui Wan decoction,then the PINP,DPYD/Cr,NTX/Cr were detected after ovariectomized rats were intragastric administrated with the schedule for 12 weeks. Results :There was statistically significant difference between Zuogui Wan,Yougui Wan group and model group in decreasing the PINP,DPYD/Cr and NTX/Cr (P

The relationship between antiproliferative effect of human IFN-γ-EGF3 fusion protein and the influence of EGF receptor binding activity has been studied on A431 cell line. Antiproliferative activity of human IFN-γ-EGF3 was higher than that of its parent IFN-γ. In the 125 I-EGF receptor competition experiment, the inhibition of EGF receptor binding capacity on the target cells was observed in the treatments of human IFN-γ or IFN-γ-EGF3, but the later was more significant. Our data suggests that the antiproliferative effects by IFN-γ and its fusion protein are closely related to their EGF receptor competitions.

Objective To explore the clinical results of total knee arthroplasty (TKA) in the treatment of knees with bony ankylosis in extension.Methods From June 2000 to June 2007,10 patients had knees with bony ankylosis in extension were treated with TKA,including 4 males and 6 females,with an average age of 49 years (range,29 to 63 years).The primary diseases were as follows:ankylosing spondylitis in 3 cases,rheumatoid arthritis in 2 cases,hemophilic arthritis in 1 care,traumatic arthritis in 3 cases and pyogenic arthritis in 1 case.The range of motion (ROM) was 0° in all knees,and the average HSS (the Hospital for Special Surgery) score before operation was 32.5±10.26.Two patients underwent bilateral TKA,and 8 underwent unilateral TKA.Results All patients were followed up for 3 to 10 years (average,5.3 years).The average HSS score was improved to 87.75±6.45 at the last follow-up,and there was significant difference compared with that before operation (t=18.668,P=0.000).The average ROM was improved to 97.08°±11.57°at the last follow-up,and there was remarkable difference compared with that before operation (t=29.063,P=0.000).The postoperative complications included cutaneous necrosis in 2 cases,deep venous thrombosis of lower limb in 1 case,periprosthetic fracture in 1 case,and deep prosthetic infection in 1 case who underwent revised TKA later.The postopertative X-ray showed no looseness of the prostheses.Conclusion TKA through medial parapatellar approach,with dissection of the rectus femoris,secondary osteotomy and soft tissue balance intraoperatively is effective in the treatment of knees with bony ankylosis in extension,which can correct the ankylosed knee deformitis successfully.Combining with the correct rehabilitation exercise,it is possible to improve significantly the function of knee and life quality in these patients.

Objective To analyze and summarize the risk factors of failed internal fixation for intertrochanteric fracture.Methods From April 2008 to April 2011,267 patients with intertrochanteric fractures in 4 hospitals were treated with internal fixation.The relationship between the failure of internal failure and possible factors as age,gender,hypertension,diabetes,the abuse of alcohol and tobacco,use of glucocorticoid,the degree of osteoporosis and fractures type were studied.According to the surgical risk assessment table,the patients were divided into low-risk,mid-risk,and high-risk group.The rate of internal fixation failure was compared in the 3 groups.Results We found 42 cases which showed radiographic failures.The internal fixation failure directly related with advanced age,diabetes,severe osteoporosis,unstable type fracture,but not gender,hypertension,the abuse of alcohol and tobacco,use of glucocorticoid.Risk factors of internal fixation failure included diabetes,osteoporosis degree,and fracture stability.Failed intertrochanteric fracture fixation mainly occurred in the mid-risk and high-risk groups.Conclusion Severe osteoporosis,unstable fracture,diabetes are risk factors of failure of intertrochanteric fracture fixation.These factors will affect the quality of surgery.For the patient with intertrochanteric fractures in the low-risk groups,internal fixation should be the first choice for treatment.For the patients in the mid-risk and high-risk group,internal fixation should be applied cautiously.For the aged patients in high-risk groups,hip arthroplasty is a wise option.

Objective To evaluate the effect of fast-track TKA upon the recovery time and degree of satisfaction of the patients.Methods 208 patients with primary osteoarthritis between 2013 and March 2015 were randomly divided into 2 groups.In fast-track TKA group was established in peri-operative analgesia,blood management,postoperative anticoagulation,surgical skill and mitigation of perioperative stress.In TKA group,conventional surgical management mode was followed.Identical discharge standards were established for patients in 2 groups to evaluate the recovery time.The patients' degree of satisfaction at postoperative 2 weeks was assessed by numerical rating scale (NRS).The degree of satisfaction about acquisition of preoperative information,degree of satisfaction about postoperative analgesia and postoperative function were statistically compared between 2 groups.Postoperative complication,blood transfusion rate,infectious events within postoperative 3 months,thrombosis-related events,re-operation and death were recorded.Results In fast-track TKA group,the mean discharge time was (2.3±1.2) d,significantly shorter compared with (4.7±5.1) d in TKA group.The mean NRS score in fast-track TKA group was 9.8±0.5 and 9.1±1.4 in TKA group.In fast-track TKA group,the mean scores of the degree of satisfaction about acquisition of preoperative information,degree of satisfaction about postoperative analgesia and postoperative function were 27.7±7.3,9.8± 1.7 and 9.6± 1.3,significantly higher than 15.5±10.1,9.2±2.2 and 8.7±1.8 in the TKA group.In fast-track TKA group,postoperative blood transfusion rate was 3.9％,considerably lower than 11.4％ in TKA group.Conclusion Fast-track TKA can shorten the length of hospital stay,not increase the mortality rate and postoperative complication,accelerate the recovery of daily activity and effectively enhance the degree of satisfaction of the patients.