Gastrointestinal benign stricture is one of common diseases in clinics , endoscopic dilation is its preferred treatment . However , for the dilation ineffective refractory strictures , it represents a difficult management problem given the limited therapeutic in-terventions available .Mitomycin-C is an antibiotic which has the dual role of anti-tumor and anti-proliferation.As an anti-proliferative drug, it was first applied in the field of ophthalmology .Local auxiliary application of MMC can be a feasible and safe measurement to improve the efficacy of refractory esophageal strictures .The aim of this study is to perform a systematic review which employs mitomycin C in the treatment of refractory esophageal strictures caused by corrosion , endoscopic submucosal dissection , esophageal atresia repara-tion and radiotherapy .

Objective To compare the clinical application effect of bi -level positive airway pressure ( BiPAP) and nasal continuous positive airway pressure ( CPAP) in the treatment of preterm infants with neonatal respiratory distress syndrome ( NRDS) .Methods 64 neonates with NRDS were divided into the BiPAP group ( n=35) and NCPAP group (n=29) according to the randomized controlled study method.The blood gas index before and after 2,12 hours of treatment,the total time for ventilation,length of stay,and the incidence rate of abdominal disten-sion,gastroesophageal reflux,bronchopulmonary dysplasia,intraventricular hemorrhage,ventilator-associated pneumo-nia in the two groups were compared.Results The levels of pH and PaO2 in the BiPAP group were higher than those in the NCPAP group in noninvasive respiratory support for 2,12h(t=2.391,2.556,2403,2.355,P=0.020,0.013, 0.019,0.022).The incidence rates of hypoxemia,apnea,re-intubation mechanical ventilation rate after 12h in the BiPAP group were lower than those in the NCPAP group(t=5.049,4.988,4.215,P=0.025,0.026,0.040).The length of stay and mechanical ventilation time in the BiPAP group were shorter than those in the NCPAP group( t=-2.096,-2.669,P=0.041,0.010).Conclusion Compared with NCPAP,early application of BiPAP can obviously reduce the invasive respiratory support rate of children with NRDS with intubation.It is worthy of promotion.

Objective To evaluate the feasibi1ity and efficacy of transcatheter closure of perimembranous and muscular ventricular septal defects (VSD) using the new Amplatzer membranous and muscular VSD occluder and observe the effect of membranous VSD occluding procedure on atrioventricular(AV) conductive system.Methods Twelve patients (7 males,5 females) with perimembranous VSD and two patients (1 male,1 female) with muscular VSD underwent an catheter closure using the new Amplatzer membranous and muscular VSD occluder.All patients who were eligible for device closure by means of cardiac Doppler echocardiography were routinely measured the parameters of blood dynamics before catheter closure. Artery-venous track was set up under the X-ray fluoroscopy,transesophageal (TEE) or transthoracic echocardiography (TTE) guidance. Devices were released in the right ventricular side.Twelve patients with perimembranous VSD underwent the cardiac electrophysiologic examination,including atrioventricular conductive time (AV interval) and atrioventricular nodal refractory time,before and after catheter closure.A11 patients were followed up at 2 weeks,1 month,3 months and 6 months after the procedures.Results The devices were deployed successfully in 14 patients.There was complete closure in 12 patients immediately,and tiny (

BACKGROUND:Autologous conditioned serum (ACS) is a new and safe biological therapy method mainly used for osteoarthritis, rheumatoid arthritis and other similar diseases. OBJECTIVE:To explore the purification method and cytokine profile of ACS. METHODS:Blood obtained equipment (containing 3 mm of glass beads) was used to collect peripheral blood samples that were mixed uniformly and then placed in a 37℃ thermostatic incubator for 24 hours, finally filtered to obtain ACS. The quantitative determination of interleukin (IL)-1Ra, IL-6, IL-8, and IL-1β was conducted, and the 36 kinds of cytokines were semi-quantitatively detected by cytokine antibody array. RESULTS AND CONCLUSION: The levels of various cytokines in ACS were obviously increased, among which, IL-1Ra level (important for alleviating osteoarthritis) was increased from 140.25 ng/L to 1125 ng/L(increased by above 8 times); IL-6 level was increased from 389.5 ng/L to 2802 ng/L; IL-8 level was not detected firstly and finally increased to 2822 ng/L. Cytokine antibody array results showed that at least 10 kinds of cytokines in ACS were changed, and most of cytokines were on a rise, and few in decline. These results indicate that the ACS contains IL-1Ra and a variety of cytokines, and some chemokines in the ACS recruit more immune cells to the inflammation sites and accelerate the inflammatory process, further exerting therapeutic effects.

At present,the AIDS epidemic situation in college students is becoming more and more serious.In view of the particularity of colleges students and the lack of professional team for AIDS prevention and control in colleges and universities,there exists ethical issues when carry out the prevention and control for AIDS in colleges and universities such as the ethical issue in publicity and education,the ethical issue in AIDS behavioral intervention,the ethical issue in the consultation and detection for AIDS.This paper suggests that it should confront the current situation of AIDS prevention and control,improve the professional level of carrying out AIDS prevention and control,adhere to the necessary principles of AIDS prevention and control,and explore a new mode to construct AIDS prevention and control in colleges and universities.

BACKGROUND: Ankle fracture combined with deltoid ligament rupture and distal tibiofibular syndesmosis injury occurs occasionally. Its treatment with distal tibiofibular syndesmosis screw fixation or deltoid ligament repair remains controversial. The former appears with poor reduction, broken nails, secondary surgery and other problems.OBJECTIVE: To observe the clinical effectiveness of suture anchor repair for ankle fracture combined with deltoid ligament injury.METHODS: Twelve patients with ankle fracture combined with deltoid ligament injury were selected from the First Affiliated Hospital of Guangzhou University of Chinese Medicine between January 2013 and December 2015. All patients were treated with open reduction, internal fixation, and anchor repair, but without distal tibiofibular syndesmosis screw fixation. The curative efficacy and joint stability were observed.RESULTS AND CONCLUSION: (1) All patients were followed-up for more than 12 months. (2) The modified Baird-Jackson scoring system showed excellent in nine cases, good in two cases, average in one case, poor in none case, and the excellent and good rate was 92%. (3) At 1 year after internal fixation, the X-ray examination showed the malleolus gap and talus slope angle of the affect side were (3.47±0.12) mm and (0.45±0.18)°, and the malleolus gap and talus slope angle of the healthy side were (3.44±0.05) mm and (0.43±0.14)°, and there was no significant difference between two sides (P > 0.05). (4) These results indicate that the suture anchor can repair the anatomy and biomechanics of deltoid ligament with stable ankle joint, and secondary surgery is unnecessary.

Objective To detect the early diversification of the bone mineral density in skeletal fluorosis of rabbits by quantitative computed tomography (QCT),and analyze the possible relationship between bone mineral density and bone injury in rabbits with fluorosis.Methods A total of 16 rabbits,half male and half female,were randomly divided into control and experimental groups according to body weight.The two groups of rabbits were given drinking water containing NaF 0 or 300 mg/L,respectively,for 90 days.After the experiment,their bone fluoride content was determined via the fluorine ion-selective electrode method.The alkaline phosphatase (ALP) and osteocalcin (BGP) in serum were measured using enzyme-linked immunosorbent assay (ELISA).Femurl bone mineral density was detected with QCT in vivo.Histopathological changes of femur were observed under light microscope and trabecular acreage was calculated.The results were analyzed with independent-samples t test(t') and partial correlations.Results The bone fluoride content [(3 232.16 ± 927.85) mg/kg],ALP [(42.69 ± 3.28) U/L],BGP concentration [(2 504.19 ± 276.79) μg/L],bone density [(653.49 ± 167.81) g/cm3] and trabecular number [(39.02 ± 3.33)Tb.Ar] of the experimental group were higher than those of control group [(554.01 ± 376.51)mg/kg,(20.50 ± 4.90)U/L,(1 294.60 ± 191.86)μg/L,(540.40 ± 41.99)g/cm3,(8.15 ± 2.34)Tb.Ar],and the differences were statistically significant (t'=7.565,10.641,10.158,2.615,14.494,all P ＜ 0.05).The tissue sclerosis,bone sclerosis and bone texture coarsening were observed through bone mineral density imaging taken by QCT in experimental group.The number of trabeculae increased and the arrangement of tra bec ulae was disorganized.Bone mineral density was positively correlated with bone fluoride,trabeculae,BGP and ALP (r =0.702,0.627,0.614,0.567,all P ＜ 0.05).Conclusions QCT bone density measurement in skeletal fluorosis of rabbits can be used to compute the threedimensional bone density.And it has a good correlation with bone fluoride content,bone histopathological changes and index of bone metabolism in skeletal fluorosis,which suggests that QCT may provide a useful reference for application in patients with skeletal fluorosis.

Objective To investigate the effects of proanthocyanidins on depressant-like behaviors and the structure of adrenal gland in chronic unpredictable mild stress (CUMS) rats. Methods Rats were randomly divided into 6 groups:control group, stressed group (CUMS + vehicle), three treatment groups (CUMS + proanthocyanidins 25,50,100 mg·kg-1,respectively) ,and imipramine group (CUMS + imipramine 10 mg·kg-1). Used the CUMS model in rats to investigate the effects of chronic oral administration (21 days) of proanthocyanidins and imipramine (ip) on the open-field;and forced swimming and sucrose consumption tests and the ratio of adrenal gland/body weight,and its thickness were examined by HE stain. Results Compared with control group, rats subjected to CUMS exhibited increased ratio of adrenal gland /body weight ( P < 0. 01), less sucrose consumption( P<0.01) and inhibited in the open-field test( P<0.01) as well as more despair time in the forced swimming test( P<0.01). While compared with stressed group,treatments with proanthocyanidins (25,50,100 mg·kg-1, po ,21 days) could significantly improve the activities in open-field test ((39.6±3.4) vs (49±4.5), (52.6±3.7),(54.1±1.8) ;all P<0.01) and sucrose consumption( (5.8±2.5)ml vs (8.1±3.3)ml,(8.5±4.1) ml, (9.2±2.6) ml; P < 0.05, P < 0.05, P < 0.01 respectively); Meanwhile, it could reduce the duration time in forced swimming test significantly( (103.5±10.2)s vs (83.7±8.8)s,(75.8±5.9)s,(67.2±6.5)s; all P<0.01) as well as thickness of the adrenal gland(P<0.05, P<0.01).Conclusions This study suggests that the proanthocyanidins (25,50,100 mg·kg-1) has an antidepressant-like effects in CUMS rats. The antidepressant actions of proanthocyanidins, in some degrees, may be related with the regulation of the adrenal gland's structure.

Objective To evaluate the feasibility and accuracy of three-dimensional (3D) printed left atrial appendage (LAA) models based on 3D transesophageal echocardiography (3D-TEE) data and the application value for treating special anatomic LAA.Methods Data of 18 patients of atrial fibrillation who were underwent LAA occlusion were retrospectively analyzed,including 3D-TEE and CT volume data of the patients.The 3D-TEE data of the LAA were post-processed and a flexible material was used to print the LAA model by 3D printer.The morphological classification and lobulated classifications of LAAs were assessed by the 3D printed models.The measurements of long axis,short axis and depth of LAAs were also performed.And the measurement and classification results were compared with those based on 3D-TEE and CT volume images.A occluder release test was performed on the 3D printed models for patients with challenging LAA morphology.Results For all 18 patients,3D-TEE full volume data of the LAA were successfully reprocessed and printed as 3D LAA models.The consistency of morphological classifications and lobulated classifications of LAAs based on 3D printed models and cardiac CT were 0.92 and 0.83,respectively.No significant differences of LAA ostium dimensions (long axis and short axis) and depth were found between the measurement results based on 3D printed models and 3D-TEE (all P＞0.05).A simulation of LAA occlusion rehearsal was successfully performed on 3D models of two challenging cases.Conclusion The echocardiographic 3D printing technique has high feasibility and accuracy,and can be promising for personalized planning in cases of transcatheter special morphological LAA occlusion.

Objective To investigate the effect of total flavones of Rhizoma Drynariae on femur distraction osteogenesis in the rabbits. Methods Thirty-two healthy rabbits were randomly divided into treatment group and control group, 16 rabbits in each group. The femoral fracture was treated with unilateral femoral distraction and was fixed with a self-made distraction instrument. After 7-day intermittent period, the fractured femur was distracted at a rate of 1 mm/d, twice a day for 10 continuous days. The treatment group was fed with total flavones of Rhizoma Drynariae from the first post-operative day to the end of the experiment. And then all of the animals were sacrificed after fixation for 28 days. The bone specimens were used for histological observation and immunohistochemical detection. Results The area of mature bone in the newborn bone tissue of the treatment group was increased, and osteoblasts number and the percentage of trabecular bone area were significantly higher than those of the control group . The bone morphogenetic protein-2 (BMP-2) and transforming growth factor-β1 (TGF-β1) were stained brown deeply, the staining degree being stronger than that of the control group. Conclusion Rhizoma Drynariae total flavones can effectively accelerate the formation and maturation of newborn bone tissue during bone distraction.