[Objective]To compare the result of treatment with double bands of Atlas Ti-cable and clavicular hook plate for total acromioclavicular dislocation.[Method]Fifty-two total acromioclavicular dislocation were treated with two different fixation.1)by double bands of Atlas cable(DC group,28 cases) and 2)clavicular hook plate(HP group,24 cases).There were 38 males and 14 females,39 acute and 13 chronic,all unilateral.The mean age of patients was 38.5 years(22~65).A sling of double cable was fixed through the base of the coracoid process and the clavicle at 1.5 cm upper medially above coracoid process.All hook plate were 6 holes.Coracoclavicular ligament was reconstructed routinely.[Result]All patients were available for an average duration of follow-up of 18.8 months(range,6~42 months).The results were evaluated by radiographic measurement and clinical recovery(muscle strength in upper arms,pain in shoulder,range of joint motion) by Lazcano standard.In HP group,14 patients were assessed as good,6 as fair and 4 as poor(good and fair 83%).In DC group,22 patients were assessed as good,5 as fair and 1 as poor(good and fair 96%).There was no statistical difference between the two groups.[Conclusion]In the treatment of acromioclavicular dislocation,fixation of double bands of Atlas cable is believed to be as good as hook plate fixation.Meanwhile,Atlas cable is featured with less pain followed operation,which in favor of early exercise.For it's good biocompatibility,titanium cable can be retained in body and does not need to be removed.

[Objective]To evaluate the outcome of tibiotalocalcaneal fusion in traumatic arthritis patients using the locked retrograde intramedullary nail with graft.[Method]Eighteen ankles underwent this procedure.There were 8 males and 10 females,9 with valgus and 2 with talipes equinovarus,all unilateral.The mean age of patients was 57.5 years(ranged,42~69) and the mean time between the procedure from primary trauma was 7.6 years(5~13 years).Bone graft were picked from distal fibula.The nail was inserted through a plantar approach with locking screws placed both proximally and distally.Patients were evaluated by a standardized follow-up examination using the AOFAS and the fusion outcome were observed radiographically.[Result]All patients were available for an average duration of follow-up of 13.5 months(ranged,6~22 months).All wound healed normally.The mean time of full bearing from operation was 13.6 weeks(ranged,9-16 weeks).One patient was found cerebral thrombosis after operation.One patient had moderate pain while walking on even surface,2 mild to moderate pain on uneven surface,1mild pain while standing and 14 relieved from pain.The average AOFAS score improved from 43.5(ranged,40~52) to 69(ranged,56~84) points.Solid fusion was achieved in 13 ankles(72%) after a mean follow-up of 16.8 months(ranged,12~24 months).Partial union was observed in 3 patients(17%) and non-union in 2 patients(11%).[Conclusion]Locked retrograde intramedullary nail fusion with bone graft is effective for traumatic tibiotalocalcaneal arthritis.

[Objective] To explore the effect of low intensity pulsed ultrasound(LIPUS)on the ability of repairing rabbit radius defect by cell-scaffold complex composed with bone marrow stromal cells(BMCs)and ?-tricalcium phosphate(?-TCP).[Method]Bone marrow of a rabbit was drawn and cultured by differentiation culture medium to harvest BMCs and the third generation BMCs were cultivated on ?-TCP for one week in vitro.Bilateral distal radial defects were made using a 1-mm saw in 20 mature New Zealand white rabbits.The cell-scaffold complexs stimulated by LIPUS were implanted in rabbit radial defects(cell-scaffold complexs without stimulation as control).All the rabbits were killed at 4 or 8 weeks after operation.The defect healing state was observed with X-ray and histological technic.The gray density of CA was analyzed by computer image analysis system.[Result]It was found that the callus in the experimental group grew more quickly and apparently than that in the control group.At 4 weeks after operation,there was significantly statistical difference(P0.05).Histological slices in the experimental group showed that the absorption,organization of hematoma,the formation of trabeculae and matrix preceded those in the control group.There were more fibroblast,osteoblasts and callus in the experimental group.[Conclusion]Cell-scaffold complex composed with BMCs and ?-TCP stimulated by LIPUS can repair bone defect more effectively than that without LIPUS stimulation at the early stage of healing,but the effect tend to decrease at the late stage.

BACKGROUND:Alcohol has become pathogenic factors of avascular necrosis, and the alcohol induced
abnormal lipid metabolism in bone marrow may be the important reason for the onset of avascular necrosis, but the mechanism is not clear yet.
OBJECTIVE:To observe the changes of structure and function of fat cel s under the action of alcohol, in order to analyze the pathogenesis of alcoholic femoral head necrosis.
METHODS:Primary adipocytes in vitro culture technique was used to obtain rabbit femoral head intramedul ary adipose tissue, and then the fat cel s were separated, and the phenotype was identified with oil red O staining. The passaged stable intramedul ary fat cel s were col ected. Coverslip was cut into 1 cm × 1 cm in size, and placed in the 24-wel culture plate before planting. The cel s were randomly divided into alcohol group and control group, 24 holes (each hole for a sample) in each group. The control group was without alcohol, while the alcohol group was added with 0.15 mol/L alcohol. At 4, 6, 8 and 10 days, the culture medium was replaced. Medium was changed and no longer adding alcohol, and then cultured for 10 days. When the culture terminated, the coverslip was removed for oil red O staining. Final y, the morphology and the number of the fat cel s were observed under light
microscope.
RESUTLS AND CONCLUSION:With time prolonging, the number of fat cel s in the alcohol group was significantly more than that in the control group (P<0.001). The lipid droplets in the two groups were gradual y increased and enlarged, but more significant in the alcohol group. The number of intramedul ary fat cel s in the alcohol group after cultured for 4, 6, 8 and 10 days was respectively (200.90±24.60), (1 102.30±76.73), (1 160.30±28.37) and (1 199.70±44.74)/cm2;the
number of intramedul ary fat cel s in the control group was respectively (99.80±10.82), (0.40±94.71), (1 000.20± 41.85) and (1 059.80±26.79)/cm2, the number of fat cel s increased with the time of alcohol influence. Alcohol can promote the intramedul ary fat cel s to increase and enlarge, and this may be the main reason for femoral head necrosis, as long-term alcoholism can lead to bone marrow fat tissue increasing, intraosseous pressure increasing and perfusion reducing, thus resulting ischemia.

Objective To explore the operative method and clinical effect of total hip arthroplasty with normal prosthesis in treatment of the advanced stage avascular necrosis of femoral head combined with severe femoral anteversion. Methods There were 15 patients ( 15 hips) including nine males and six females, at age range of 30-42 years (mean 37 years). The femoral anteversion was 40°-50° and Harris score of (59 ± 8) points. Total hip arthroplasty with normal prosthesis was performed to reduce the femoral anteversion for 20°-30° and increase the acetabulum anteversion for 10°-15°so as to recover a good involution relationship of the femoral head and the acetabulum and avoid anterior dislocation. The imaging examination and Harris scoring were performed regularly postoperatively. Results A follow-up for mean 2.9 years (2.5-3.7 years) in 15 patients showed that all patients obtained good range of joint motion and good stability of all the hip prostheses. Harris score was (88±6) points at 2 years post-opera-tively, which was significantly better than preoperation (P < 0.01 ). Conclusions Total hip arthro-plasty with normal prosthesis can obtain good involution of the femoral head and the acetabulum in patients with advanced stage avascular necrosis of femoral head combined with severe femoral anteversion by simul-taneously regulating implant angle of femoral prosthesis and acetabular cup, which helps avoid use of small or specially made femoral stem or subtrochanteric derotational osteotomy.

PURPOSE: The aim of this study was to measure the elasticity of normal placentas using the Virtual Touch quantification (VTQ) technique. METHODS: This study was approved by the Institutional Ethics Committee. Fifty randomly selected, healthy pregnant women in their second trimester and 50 randomly selected, healthy pregnant women in their third trimester with a single fetus were included, and their placentas underwent VTQ through shear wave velocity (SWV) measurements. The measurements were performed at different locations to sample different areas of the placenta. Measurements were performed 3-4 times in each location, the mean shear wave velocities were calculated without the highest and lowest values of measurements in each region, and the results were compared. RESULTS: The SWV of the placenta was 0.983±0.260 m/sec, and the minimal and maximal speed was 0.63 m/sec and 1.84 m/sec, respectively. There was no significant difference between the second and third trimester of VTQ of the placenta in terms of SWV (0.978±0.255 m/sec vs. 0.987±0.266 m/sec, P=0.711). The maternal age between second and third trimester was 27.9±4.3 years and 29.2±4.4 years, respectively; there was no significant difference between them (P=0.159). CONCLUSION: The results of this study show that the SWV of normal placenta tissue is 0.983±0.260 m/sec, it has little variation between the second and third trimesters, and the VTQ technique may potentially play an additional role in placenta evaluation.
Elasticity Imaging Techniques ; Elasticity* ; Ethics Committees ; Female ; Fetus ; Humans ; Maternal Age ; Placenta* ; Pregnancy ; Pregnancy Trimester, Second ; Pregnancy Trimester, Third ; Pregnant Women ; Ultrasonography

Objective To investigate the pattern of nodal recurrence after curative resection in adenocarcinoma of the gastroesophageal junction ( AGE ) , and to provide a basis for delineation of the radiation range in the high-risk lymphatic drainage area.Methods A retrospective analysis was performed in 78 patients with locally advanced AGE who were newly treated in our hospital from January 2009 to December 2013 and had complete clinical data.All patients received curative resection and were pathologically diagnosed with stage T3/T4 or N (+) AGE.Those patients were also diagnosed with SiewertⅡor Ⅲ AGE by endoscopy, upper gastroenterography, macroscopic examination during operation, and pathological specimens.None of the patients received preoperative or postoperative radiotherapy.All patients were diagnosed by imaging with postoperative nodal recurrence.The computed tomography images of those
patients were accessible and had all the recurrence sites clearly and fully displayed.Results The median time to recurrence was 10 months ( 1-48 months) , and 90%of the recurrence occurred within 2 years after surgery.The lymph nodes with the highest risk of recurrence were No.16b1( 39%) , No.16a2( 37%) , No.9 (30%), and No.11p (26%), respectively.There was no significant difference in the recurrence rate within each lymphatic drainage area between patients with SiewertⅡandⅢAGE ( P=0.090-1.000) .The lymph nodes with the most frequent recurrence were No.16b1, No.16a2, No.9, No.16b2, No.11p, and No.7 in patients with stage N3 AGE and No.11p, No.16b1, No.16a2, No.9, No.8, and No.7 in patients with stage non-N3 AGE.Patients with stage N3 AGE had a significantly higher recurrence rate in the para-aortic regions (No.16a2-b2) than those with stage non-N3 AGE (67%vs.33%, P=0.004, OR=4.00, 95% CI=1.54-10.37) .Conclusions The lymph nodes with the highest risk of recurrence are located in the celiac artery, proximal splenic artery, and retroperitoneal areas ( No.16a2 and No.16b1) in patients with SiewertⅡorⅢlocally advanced AEG.Moreover, patients with stage N3 AGE have a higher risk of retroperitoneal recurrence.The above areas should be involved in target volume delineation for postoperative radiotherapy.

Objective:To investigate the radiation field and dose selection of patients with isolated chest wall recurrence (ICWR) after modified radical mastectomy, and analyze the prognostic factors related to subsequent chest wall recurrence.Methods:Clinical data of 201 patients with ICWR after mastectomy admitted to the Fifth Medical Center, Chinese PLA General Hospital from 1998 to 2018 were retrospectively analyzed. None of the patients received postoperative adjuvant radiotherapy. After ICWR, 48 patients (73.6%) underwent surgery and 155 patients (77.1%) received radiotherapy. Kaplan-Meier method was used to calculate the post-recurrence progression-free survival (PFS) rates and the difference was compared by log-rank test. Multivariate analysis was performed using Cox regression model. Competing risk model was adopted to estimate the subsequent local recurrence (sLR) rates after ICWR and the difference was compared with Gray test. Multivariate analysis was conducted using F&G analysis. Results:With a median follow up of 92.8 months after ICWR, the 5-year PFS rate was 23.2%, and the 5-year sLR rate was 35.7%. Multivariate analysis showed that patients with surgery plus radiotherapy and recurrence interval o F>12 months had a lower sLR rate. Patients with recurrence interval o F>48 months, local plus systemic treatment and surgery plus radiotherapy had a higher PFS rate. Among the 155 patients who received chest wall radiotherapy after ICWR, total chest wall irradiation plus local boost could improve the 5-year PFS rate compared with total chest wall irradiation alone (34.0% vs. 15.4%, P=0.004). Chest wall radiation dose (≤60 Gy vs.>60 Gy) exerted no significant effect upon the sLR and PFS rates (both P>0.05). In the 53 patients without surgery, the 5-year PFS rates were 9.1% and 20.5%( P=0.061) with tumor bed dose ≤60 Gy and>60 Gy, respectively. Conclusions:Local radiotherapy is recommended for patients with ICWR after modified radical mastectomy of breast cancer, including total chest wall radiation plus local boost. The radiation dose for recurrence should be increased to 60 Gy, and it should be above 60 Gy for those who have not undergone surgical resection. In addition, patients with ICWR still have a high risk of sLR, and more effective treatments need to be explored.

Objective:To analyze the prognosis of patients with isolated regional recurrence (RR) after mastectomy, and evaluate the efficacy of radiotherapy and identify the optimal radiation target volumes.Methods:Clinical data of 144 patients with first isolated RR after mastectomy between 2001 and 2018 were retrospectively analyzed. All patients had not received post-mastectomy radiotherapy. The primary endpoints consisted of the subsequent locoregional recurrence (sLRR), distant metastasis (DM), progression-free survival (PFS) and overall survival (OS).Results:With a median follow-up of 82.5 months after RR, the 5-year sLRR, DM, PFS and OS rates for the entire group were 42.1%, 71.9%, 22.9% and 62.6%, respectively. Local plus systemic therapy was an independent favorable prognostic factor for sLRR ( P<0.001) and PFS ( P=0.013). The sLRR rate in the surgery plus radiotherapy group was the lowest ( P<0.001). Surgery plus radiotherapy significantly reduced the 5-year risk of recurrence within the initially involved nodal regions ( P<0.001). Patients with chest wall irradiation obtained the 5-year subsequent chest wall recurrence rate of 12.1% compared to 14.8%( P=0.873) for those without chest wall irradiation. The subsequent supraclavicular recurrence rate was lower in patients with prophylactic supraclavicular irradiation than that without prophylactic supraclavicular irradiation (9.9% vs. 23.8%, P=0.206). The incidence rates of initially uninvolved axillary and internal mammary nodal recurrence were below 10% regardless of prophylactic irradiation or not. Conclusions:Patients with RR alone have an optimistic 5-year OS in the contemporary era. Comprehensive locoregional treatment including surgery and radiotherapy combined with systemic therapy is recommended. The chest wall, axillary and internal mammary nodal prophylactic irradiation should not be routinely performed for all patients with RR. The value of supraclavicular prophylactic irradiation remains to be evaluated.

【Objective】 To evaluate and analyze the impact of COVID-19 epidemic on inventory of red blood cells (RBCs)in local and municipal blood stations in China, and to provide reference for the management of public health emergencies. 【Methods】 Relevant data from 2018 to 2021 were collected, and the differences in the volume of qualified RBCs, the usage efficiency of inventory RBCs, the average daily distribution of RBCs,the blood distribution rate of RBCs prepared by 400 mL whole blood, the difference in the average storage days of RBCs at the time of distribution, the average daily inventory of RBCs and the time of the average daily inventory of RBCs to maintain the distribution in 24 local and municipal blood stations in China during the COVID-19 epidemic and non-epidemic periods were retrospectively analyzed. 【Results】 Compared with non-epidemic periods, the volume of qualified RBCs [(117 525.979 ±52 203.175)U] and the average daily distribution of RBCs [( 156. 468 ± 70. 186) U ] increased significantly, but the usage efficiency of inventory RBCs decreased(97.24%±0.51%) significantly (P<0.05).There was no significant difference in the blood distribution rate of RBCs prepared by 400 mL whole blood(73.88%±20.30%), the average storage days of RBCs distribution(13.040 ±3.486), the average daily stock quantity of RBCs[(2 280.542 ±1 446.538) U ] and the time of the average daily inventory of RBCs to maintain the distribution[(15.062 ±7.453) d] (P>0.5). 【Conclusion】 During the COVID-19 epidemic, the inventory management of RBCs operated well, the overall inventory remained relatively stable, the stock composition and storage period showed no significant change.