Anastomosis, Surgical ; adverse effects ; Brachiocephalic Trunk ; pathology ; Hemorrhage ; etiology ; therapy ; Humans ; Larynx ; surgery ; Male ; Middle Aged ; Postoperative Complications ; Trachea ; surgery ; Tracheal Stenosis ; etiology ; surgery ; Tracheotomy ; adverse effects

Objective Obstructive sleep apnea hypopnea syndrome (OSAHS) often causes damage to multiple systems, especially to the central nervous system, inducing cognitive dysfunction.This study aims to explore the possible correlation of the expressions of serum hypoxia-inducible factor-1α (HIF-1α) and brain-derived neurotrophic factor (BDNF) with cognitive impairment in rats under different hypoxia conditions.Methods Twenty-four Wistar rats were equally randomized into a normal control, a chronic intermittent hypoxia (CIH), and a chronic continuous hypoxia (CCH) group.The rats of the CIH group were placed in a hypoxia chamber filled with N2 and air, the oxygen concentration switched from (7±0.5)% to 21%, 1.5 minutes for each state and 4 minutes for each cycle, while those of the CCH group were placed in another hypoxia chamber with the oxygen concentration of (7±0.5)%, 8 hours a day and all for 30 days.Then we recorded the body weight of the rats, detected the expressions of serum HIF-1α and BDNF by ELISA, and observed the changes of behavior by Morris water maze test and those of the hippocampal morphological structure by HE staining.Results At 30 days after modeling, the body weight of the rats was significantly decreased in the CIH and CSH groups as compared with the normal control ([195.75±6.497] and [180.88±12.017] vs [218.63±15.287] g, P<0.05).Positioning navigation showed that the escape latency was significantly longer in the hypoxia models than in the controls (P<0.05), even longer in the CIH than in the CCH group (P<0.05).Spatial exploration test manifested a lower frequency of crossing the platform in the CIH and CCH groups than in the control ([2.63±1.45] and [3.22±1.30] vs [4.97±0.47] times, P<0.05).The expression levels of serum HIF-1α and BDNF were significantly higher in the CIH ([36.14±9.34] and [1625.34±332.44] pg/mL) and CCH ([27.27±6.88] and [1204.07±363.81] pg/mL) than in the normal control group ([14.11±4.06] and [1036.40±124.48] pg/mL) (P<0.05), even higher in the CIH than in the CCH group (P<0.05).HE staining exhibited scattered and disorderly arrangement of hippocampal neurons in the model rats, with unclear nuclear membrane, pyknosis of the nuclei, darkly stained cytoplasm, and some damaged cells.More obvious absence and vacuolization of some cells were observed in the rats of the CIH group.Conclusion Chronic hypoxia inhibits the growth and development of rats and induces cognitive dysfunction.High-level HIF-1α in chronic intermittent hypoxia indicates hypoxia-stress of the body, while compensatory increase of serum BDNF may be involved in neuronal cell damage regulation.

Objective The aim of this study was to evaluate the feasibility of three-dimensional printing (3DP) for the preparation of porous titanium implant and to investigate the impacts on microstructure and mechanical properties with different sintering temperatures.Methods The CAD model of the specimens was designed to be 25 mm in diameter,20 mm in height,and with 0.5 mm pore size mesh.On every cross-section,80％ bonding area was designed.Titanium powder (purity of 98.5％,75 μm diameter) was selected as raw material.Polyvinyl alcohol powder (160 μm diameter) was selected as a binder,and polyvinylpyrrolidone powder was selected as an auxiliary binder.The green porous titanium implants were fabricated by 3DP followed by sintering at 1 200,1 300,1 400 ℃,separately,under the protection of argon gas.After sintering,the properties of porous titanium implants were evaluated,including the porosity,microstructure,microhardness,compressive strength and elastic modulus.Results After sintering,the specimen had uniform contraction and no obvious distortion.The specimen sintered at 1 200,1 300 and 1 400 ℃ sintering temperatures had porosity of (65.01±1.03)％,(46.73±0.73)％ and (41.06±0.31)％,hardness of 115.2±0.6,148.6±1.1 and 182.8±2.1,elastic modulus of (5.9±0.5),(16.2±0.9) and (34.8±1.5) GPa,compressive strength of (81.3±4.3),(135.4±8.5) and (218.6±7.1) MPa,respectively.A porous structure with three-dimensional network of connected pores was observed under scanning electron microscope.Conclusion It is feasible to fabricate porous titanium implants by three dimensional printing technique.The mechanical properties of the porous titanium implants match well with bone tissue which has excellent biomechanical compatibility.

Objective To understand the gene carrying rate ,gene mutation types and distribution characteristics of thalassemia in the northeast area of Chongqing .Methods 28 633 specimens collected from the patients and individuals with physical examina‐tion in our hospital from January to December 2013 were performed the RBC parameters detection and hemoglobin electrophoresis screening .The specimens with phenotype positive were definitely verified the thalassemia type by using Gap‐PCR and reverse dot blot(RDB) .Results Among 28 633 specimens ,1 358 specimens were finally diagnosed as thalassemia with the thalassemia carrying rate of 4 .74% ,including 589 cases(2 .06% ) of α‐thalassemia and 741 cases (2 .59% ) of β‐thalassemia cases .Among the α‐thalasse‐mia genotypes ,‐αα/‐‐SEA genotype(1 .38% ) was most common ,the next was ‐αα/‐α3 .7 genotype (0 .37% ) and αα/‐α4 .2 genotype (0 .20% ) .Among the β‐thalassemia genotypes ,CD41‐42 genotype (1 .27% ) had the highest constituent ratio ,followed by IVS‐2‐654 genotype(1 .27% ) and CD17 genotype(0 .30% ) .28 cases were found to be the double heterozygote with α‐thalassemia and β‐thalassemia .Conclusion The northeast area of Chongqing is a region with the high incidence rate of thalassemia and complicated heredity .Therefore this research provides the reference information for the prevention of thalassemia ,genetic counseling and prena‐tal diagnosis .

Objective To study the influence of cholangiocarcinoma cells on endothelial cells in a co-culture system. Methods A co-culture system of eholangioeareinoma cell line QBC939> and endothelial cells was established in vitro (co-culture group). Endothelial cells were cultured individually during the same time (control group). The mixed supematant of cholangiecareinoma cells and endothelial cells was in the mixed group. Light microscopy and transmission electron micrescopy were used to observe the morphology of the endothelial cells. Changes in expression of ppI25FAK, MMP-2, MMP-9 and uPA of the endothelial cells were detected by mmunofluorescence, and the activities of MMP-2 and MMP-9 were detected by gelatin zymography. All the data were analyzed by paired t test. Results The intercellular space between endothelial cells in co-cuhure group was wider than in the control group. The expression of pp125FAK, MMP-2, MMP-9 and uPA was 394 ±51,455±82, 377±48,422±55 in control group, and was 1096±128,931±72,815±76,801±56 in the eo-euhure group. The difference between the 2 groups had statistical significance (t = 6.53,4.32, 3.61,3.45, P < 0. 05). The values of gray-scale scanning of MMP-2 and MMP-9 in the mixed group were 240.2±15.2 and 2.4±0.8, respectively. The values of gray-scale scanning of MMP-2 and MMP-9 in the co-culture group were significantly increased, they were 687.4 ± 43.6 and 150.9 ± 13.2, respectively (t = 4.89, 5.43, P < 0.05). Conclusions The intercellular space between endothelial ceils and the expression of the proteolytie enzymes are increased after co-culturing endothelial cells with eholangiocarcinoma cells. Proteolytie enzymes may be involved in the process of degradation of subendothelial matrix, and promotes the metastasis of cholangiocarcinoma.

Objective To investigate the accuracy of three dimensional facial measurement system based on structured light projection, and explore the methods to reduce noise of the output images. Methods The known object for calibration was measured by the measurement system to correct the parameters of the system and enhance the measurement accuracy. The mechanism of noise was analysed, and the noise and sundry of the images were eliminated. Results The parameters of each assembly of system were obtained by calculation and calibrated, and the measurement accuracy (0.028 mm) of three dimensional facial measurement system based on structured light projection was increased. Application of image processing technology reduced the noise and sundry of output images. Conclusion The accuracy of three dimensional facial measurement system based on structured light projection is high. The image output is reliable, and can be clinically used in facial scanning and three dimensional reconstruction.

Objective To analyze genetic and clinical features of 14 children with ?-thalassemia intermedia in Guangxi area.Methods ?-thalassemia genes,?-thalassemia genes,single nucleotide polymorphism(SNP) at position-158 of()~G?-globin gene,AT repeats polymorphisms of DNase I-hypersensitive site 2 of the ?-globin gene cluster locus control region(?-LCR-HS2) were detected by PCR techniques.Clinical data were analyzed.Results Genotype:1.Seven cases were homozygous or compound heterozygous for nt-28(A→G).Among them,2 cases′ genotypes were nt-28/nt-28,1 case was ?~E/ nt-28,2 cases were ?~0/nt-28,1 case(?~0/nt-28) co-inherited()~G?158(T) and 1 case(?~0/nt-28) co-inherited simultaneously()~G?-158(T) and——SEA ?-thalassemia-1 genes.2.Three cases with ?~0/?~0 presented()~G?-158(T),and other 3 cases co-inherited——SEA ?-thalassemia-1 genes.3.One patient with ?~0/?~0 co-inherited()~G?-158(T) and——SEA ?-thalassemia-1 genes.4.Six cases carrying()~G?-158(T) had(AT)_9 N_(12)(AT)_(10) sequences in ?-LCR-HS2.Phenotype:The values of Hb,MCV,HbF of 14 patients were(75.9?9.7) g/L,(68.9?5.9) fL,66.9%?16.3%,respectively.Except for 2 cases with genotypes of nt-28/nt-28 and 1 case with ?~E/nt-28 who had never been transfused,the others had more severe symptoms and required irregularly transfusion.Conclusions In the 14 children with ?-thalassemia intermedia from Guangxi area,nt-28(A→G),()~G?-158(T) and——SEA ?-thalassemia-1 gene are main alleviating gene factors.Incidence of(AT)_9 N_(12)(AT)_(10) sequence in ?-LCR-HS2 in these patients is high.Patients who are homozygous for nt-28 or compound heterozygous for ?~E have milder phenotypes.

AIM: To evaluate the protective effects of mycophenolate mofetil on the kidneys of type 2 diabetic rats and discover their mechanisms. METHODS: Wistar rats were divided into three groups, such as normal control rats, diabetic rats, and diabetic rats in the treatment with mycophenolate mofetil (MMF, 15 mg?kg -1 ?d -1 ). Thirteen weeks later, urinary albumin excretory rate (UAE), creatine clearance (Ccr), blood glucose, blood insulin and blood lipid were measured, and kidney pathology was observed. Inmmunohistochemistry was used to analyze the expression of CTGF, ColI and ColⅢ. RESULTS: Mycophenolate mofetil decreased UAE, Ccr and reduced glomerular volume. The expression of CTGF and deposition of ECM decreased after diabetic rats received mycophenolate mofetil. CONCLUSION: Mycophenolate mofetil can protect the kidney of diabetic rats. Its mechanism may be related to the decrease of CTGF expression and extracellular matrix deposition in renal tissue.

To systematically evaluate the clinical efficacy and safety of compound Danshen injection in treating hypoxic-ischemic encephalopathy (HIE) of newborns. Computer retrievals were made in PubMed, Embase, Cochrane Library, CBM, CNKI, VIP and China info (before May 2014) and relevant literature references, and manual retrievals were made for journals and conference papers, in order to collect randomized or semi-randomized controlled trials concerning compound Danshen injection in the treatment of neonatal HIE. The quality of included references was evaluated according to literatures recommended by Cochrane Handbook. RevMan 5. 3 software was applied in the statistical treatment. Finally, a total of 13 randomized controlled trials were included, covering 1,211 patients (including 639 patients in the compound Danshen injection-treated group and 572 patients in the control group). Meta-analysis results showed that the routine treatment combined with compound Danshen injection can improve the treatment efficiency of neonatal HIE [RR = 1.28; 95% CI (1.21-1.36)], reduce the mortality rate [RR = 0.42; 95% CI (0.23-0.75)] and the incidence of long-term neurological sequelae [RR = 0.48; 95% CI (0.35-0.65)], with statistical differences. No fatal side effect was observed in all of included trials. So far, limited evidences in this study proved that the application of compound Danshen injection in the treatment of neonatal HIE can enhance the clinical efficiency. However, because of the low quality of the included trials, more well-designed and large-scale multi-center randomized controlled trials shall be made in the future.
Drugs, Chinese Herbal ; administration & dosage ; Humans ; Hypoxia-Ischemia, Brain ; drug therapy ; Infant, Newborn ; Infant, Newborn, Diseases ; drug therapy ; Injections ; Randomized Controlled Trials as Topic

Objective To measure the financial burden incurred by hypertension to urban patients in Beijing, Nanjing and Hangzhou cities. Methods Two communities were sampled from the three cities randomly, and 300 hypertension patients were sampled randomly from hypertension control files in each community for questionnaire survey. Results Health expenditure of the families with hypertension patients accounts for 14. 4% of the family's income, and 18. 2% of the family's expenditure, a ratio far beyond the national average (10.6 %). However, the majority of them report the burden as affordable.The basic medical insurance for urban residents helps alleviate the financial burden of hypertension patients and the extent of such burden has a close bearing on the outcome of hypertension treatment and prevention. Conclusion Effective community-based blood-pressure monitoring and control system is key to reducing the financial burden of hypertension. The reimbursement policy for hypertensive patients within the basic medical insurance is expected to be further improved.