Objective: To establish medical equipment rental center, not only can reduce the duplication of medical equipment purchase, and can reduce equipment maintenance cost, and improve utilization and good rates of medical equipment. Methods: Emergency rescue equipment rental center is established, which is managed by the Equipment Division with responsible for managing shared management mode, and in which the equipment is leased by Clinical departments. Results: The establishment of emergency rescue equipment rental centers, on the one hand, optimized the allocation of resources hospitals, and saved investment and maintenance expenses for the hospital; on the other hand improved the utilization of medical equipment, and protected the integrity of the rate of the device, and provided the most reliable service for clinical departments. Conclusion:By establishing emergency rescue medical equipment rental centers and improving of management mode of medical devices, sharing of resources has been achieved, and the utilization of the equipment has been improved, and equipment performance has been guaranteed.

Articular cartilage repair is one of the most challenging issues which remains to be resolved in clinic work. Discovering of bone marrow stromal cells (BMSC) and its application in tissue engineering provide new methods for the treatment of cartilage defects. High seeding density, appropriate cytokines and three-dimensional culture play important roles in the process of inducing BMSC differentiating into chondrocytes, suitable scaffold is also essential in reconstructing cartilage in vitro by methods of tissue engineering.

Objective To investigate the correlation between infertility and TORCH infections ,analyse the possible influence factors .Methods TORCH infections of 2343 cases of pregnant women and 1356 cases of infertility women were detected by chemi‐luminescence method ,the positive rates of TORCH‐IgM ,IgG were compared .Results RV ,HSV infections of infertility women were higher ,mainly in 30 -34 years group .TORCH infections of infertility women among seasons were of significant difference (P<0 .05) .TORCH infections of infertility women have correlations with schooling levels ,source of family ,and history of expo‐sure to animals (P<0 .05) .Conclusion The less education ,rural aera ,and history of exposure to animals were high risk factors of TORCH infections ,so screening for TORCH infections of infertility women is very necessary .

Objective:To estimate the safety and feasibility of flexible laryngeal mask airway (FLMA) for lumbar vertebral surgery in prone position.Methods: In the study,120 adult patients scheduled for lumbar vertebral surgery under intravenous general anesthesia were divided into group FLMA and reinforced tracheal tube (RTT) group at random.Heart rate (HR),systolic blood pressure (SBP) and diastolic blood pressure (DBP) were recorded at the beginning of anesthesia induction (T0) and on the time of artificial airway intubation (T1),1 min after intubation (T2),extubation (T3),1 min after extubation (T4) as well.The number and time required for intubation were recorded.Peak airway pressure (PPEAK),airway sealing pressure (PAS) in group FLMA and fiberoptic bronchoscopy scale (FBS) were recorded after artificial airway intubation,turned over into prone position and after the operation started,as well as on the time of 1 hour after the operation started,2 hours after operation started and when the operation stopped.Finally,respiratory complications after extubation,including hypoxemia,laryngospasm,coughing,vomiting,hoarseness,and pharyngalgia,were observed and whether there was blood or sewage inside and outside the artificial airway was recorded.Results: There was no difference in the number and time required for intubation between the two groups (P>0.05).There was no difference in PPEAK and FBS between the two groups,and also the same at the different time points in each group (P>0.05).PAS in group FLMA was the same at the diverse time points during anesthesia (P>0.05) and always higher than PPEAK in the perioperative period.In group FLMA,there was no difference in HR,SBP and DBP between the time points of T2 and T1,also of T4 and T3 (P>0.05).In group RTT,HR,SBP and DBP were significantly higher between the time points of T2 and T1 (P<0.01);SBP was significantly higher between the time points of T4 and T3 (P<0.01),DBP and HR were higher between the time points of T4 and T3 (P<0.05).SBP in group FLMA was significantly lower than in group RTT at T2 (P<0.01),HR and DBP were lower than those in group RTT simultaneously (P<0.05).On the time point of T4,SBP,DBP and HR in group FLMA were lower than those in group RTT (P<0.05).The incidence of coughing and pharyngalgia after extubation was significantly lower in group FLMA than in group RTT (P<0.01),with the incidence of hoarseness was lower in group FLMA than in group RTT (P<0.05).There was no difference in the incidence of hypoxemia,vomiting and blood seen outside the cuff between the two groups (P>0.05) while no laryngospasm and sewage seen outside the artificial airway in each group.Conclusion: For suitable patients,FLMA can be used in mechanical ventilation forlumbar vertebral surgery in prone position with more stable circulation and less respiratory complications than RTT.Further clinical validation is needed for the safety of FLMA.

A large real-time processing of ultrasonic signals is a very important part in the ultrasound diagnosis system,especially with digital hardware processing.A key part of the signal processing is the filter design which will affect the performance of ultrasound diagnostic equipment.In this paper,the classification of digital filters is introduced briefly,and a number of hardware implementation methods of digital filter in recent years,especially the realization of FIR filters which belongs to the classical filter based on Distributed Algorithms are discussed.Then a number of advantages and problems of digital filter in recent years are analyzed.On this basis,the paper forecasts its developing trends in the future.

0.05). CONCLUSIONS The pathogenic bacteria from VAP subglottic secretion are mostly Gram-negative rods, in which the dominant bacteria are A. baumannii, P. aeruginosa, S. maltophilia, K. pneumoniae and Escherichia coli. Most of them are multi-drug resistant. The kinds of pathogenic bacterial strains in subglottic secretion and lower respiratory tract secretion are not only consistent but also similar to each other in terms of composition and drug resistance.

AIM: To investigate the differentiation of human bone marrow mesenchymal stem cells (MSC) into chondrocytes in vitro and determine factors involving in the differentiation process. METHODS: MSC were separated from iliac bone marrow with lymphocyte separating medium using density centrifugation. Cells were cultured and expanded in medium until reaching required number. MSC was induced to differentiate into chondrocytes by adopting high cell density, supplying growth factor and using micromass culture. Cells were observed by HE staining. Matrix of cartilage was detected by alcian blue and toludine blue and cartilage specific collagen II was detected by immunohistochemistry. RESULTS: The structure of the micromass assumed that of cellular cartilage, alcian blue staining were uniformly positive and toludine blue detected diffuse metachromasia substance, cells uniformly expressed collagen Ⅱ. CONCLUSION: High cell density, growth factor and appropriate culture conditions are critical to induce differentiation of MSC into chondrocytes. [

Objective To analyse the correlation between cytotoxic T-lymphocyte antigen-4(CTLA-4)gene polymorphism-318 T/C ,CT60 G/A and the susceptibility of hepatocellular carcinoma (HCC) .Methods Totally 277 cases of HCC and 306 healthy controls in our hospital from September 2012 to September 2014 were selected as the research subjects ,all subjects were Han nationality .The peripheral blood (5 mL) in each case was collected for separating serum ,the AFP level was detected by chemilunescent method ,the serum IL-2 ,IL-4 and TGF-β levels were detected by ELISA .Genomic DNA was extracted ,after PCR amplification ,the CTLA-4-318 T/C ,CT60 G/A gene polymorphism distributions were detected by the direct sequencing method . Results The CTLA-4-318 CC and CT60 AA genotypes all conformed to the Hardy-Weinberg equilibrium(P> 0 .05) .CTLA-4-318 CC and CT60 AA were related with the HCC risk decrease ,different genotypes of CTLA-4 CT60 G/A had obvious relation with serum AFP level(χ2 =12 .779 ,P=0 .012) .The serum IL-2 and IL-4 levels in the HCC patients carrying CTLA-4-318 T and CT60 G allele were significantly decreased ,while the TGF-βlevel was significantly increased ,moreover CTLA-4-318 had obvious relation with the HCC grading .Conclusion CTLA-4-318 TT could promote the occurrence and progression of HCC ,which might be related with the down-regulation of Th1/Th2 type cytokines ,and up-regulation of Th3 type cytokine .

Objective:To investigate the value of serum miR-214-5p level in predicting acute kidney injury(AKI)after cardiac surgery in children.Methods:From January 2015 to December 2019, 102 children with congenital heart disease underwent extracorporeal circulation in Haikou Maternal and Child Health Hospital were selected.The children were divided into AKI group( n=28)and non-AKI group( n=74). The levels of serum miR-214-5p, serum creatinine(Scr), cystatin C(Cys-C)and kidney injury molecule-1(KIM-1)were measured three hours after operation in both groups.Multivariate logistic regression was used to analyze the risk factors of AKI after cardiac surgery in children.The values of miR-214-5p, Scr, Cys-C and KIM-1 levels in predicting AKI in children after cardiac surgery were analyzed by receiver operating characteristic(ROC)curve. Results:The levels of serum miR-214-5p[(3.14±1.36)vs.(0.95±0.47)], Scr[(490.35±93.62)μmol/L vs.(108.26±22.40)μmol/L], Cys-C [(3.27±0.85)mg/L vs.(0.86±0.24)mg/L] and KIM-1 [(26.83±8.70)μg/L vs.(6.42±1.18)μg/L] in AKI group were significantly higher than those in non-AKI group(all P<0.05). Multivariate logistic regression analysis showed that serum miR-214-5p, Scr, Cys-C and KIM-1 levels were independent risk factors for AKI in children after cardiac surgery( OR=2.518, P<0.001; OR=1.630, P=0.035; OR=1.974, P<0.001; OR=2.902, P<0.001). ROC curve analysis showed that the area under the curve(0.958, 95% CI: 0.905-0.996)of miR-214-5p, Scr, Cys-C and KIM-1 combined prediction of AKI were the largest, and its sensitivity and specificity were 98.5% and 86.3%, respectively. Conclusion:The level of serum miR-214-5p is significantly higher in children with AKI after cardiac surgery, which is an independent risk factor for AKI after cardiac surgery, and the combination of Scr, Cys-C and KIM-1 levels can better predict the occurrence of AKI.

Objective To predict the length of peripherally inserted central venous catheters(PICC) with electronic chest radiograph scale measurement techniques, and observe its clinical effect. Methods A total of 185 breast cancer patients from October 2012 to December 2013 who were treated by PICC combined with MST guided by ultrasonic technology were as control group. A total of 192 breast cancer patients from January to November 2014 were as observation group. Control group adopted from the puncture point to right sternoclavicular joints impreaaion nip down again to the third floor of PICC in vitro measurement method. Observation group used to right sternoclavicular joints from the puncture point plus right sternoclavicular joints to subcarinal 1 vertebral body length, right sternoclavicular joints to subcarinal 1 vertebral body length measurement by electronic chest radiograph scale technology directly measured from the electronic chest radiographs. The accuracy rates and complications between the two measurement methods were compared. Results The accuracy rate in observation group was 97.92%(188/192), which was higher than that in control group (68.11%,126/185 ),and there was significant differencek,χ2=60.15, P<0.01. The complication rate in observation group was 6.77%(13/192), which was lower than that in control group (20.54%, 38/185) ,and there was significant difference,χ2=9.58, P<0.01. Conclusions The electronic chest radiograph scale measurement techniques could effectively improve the accuracy of PICC catheter placed, improve the quality of venipuncture, decrease the complications .