In order to check out the cortical EEG signals of conscious and/or anesthetized rats, a 16-channel analog signals preprocessor is developed. This preprocessor can amplify and filter the primal EEG signals to transform them into ones with proper altitudes and high SNRs, and then they will be sent to the A.D converter. Some measures are taken in view of the signals' low frequencies, low SNRs and background with strong interference. When high gain made, such performances of the circuit are emphasized as low noise, low offset voltage, low gain error and heightened CMRR.

Objective To investigate the protective effect and the possible mechanism of intravenous infusion with perfluorocarbon pretreatment and posttreatment on acute lung injury in rats on LPS-induced acute lung injury in rats.Methods A total of 24 Wistar rats were randomly divided into 4 groups:control group(NS group),LPS group,Pre group and Post group.Normal saline was given to NS group as a control.Rats were treated with LPS by intratracheal instillation in LPS group,rats received PFC through femoral vein.prior to LPS instillation in Pre group and rats received PFC through femoral vein after LPS instillation in Post group.NS group were sacrificed at 6 h after being injected with NS,LPS group,Pre group and Post group were sacrificed at 6h after being given LPS.Pathological changes of king,PaO2,lung wet to dry weight ratio (W/D),expression of myeloperoxidase (MPO) and intercellular adhesion molecule-1 (ICAM-1) of lung were assessed.Results Intravenous.infusion with perfluorocarbons increased PaO2,decreased W/D,MPO and ICAM-1 significantly (P＜0.05),and this effect is more remarkable in Pre group.Conclusion Intravenous infusion of PFC significantly protects lung from acute lung injury,especially by pretreatment forms,probably by down-regulate the expression of ICAM-1.

Objective To determine serum concentration of methotrexate in children with acute lymphoblastic leukemia by HPLC and explore the application practice.Methods The separation was performed in a Wondasil C18-WR column (4.6 mm ×150 mm, 5 μm) with a mobile phase of methanol-0.15%phosphoric acid solution(21:79 ) and determined at 306 nm.The sample of serum was centrifuged after protein precipitation with perchloric acid.Detected results for children to establish monitoring files.ResuIts The linearity was well at 0.02 ~50 μg/mL of methotrexate ( r =0.9990,n=6).The average recovery was 96.50%, RSD of within day and between days were less than 15%.Established monitoring files for six children and after 3 courses of treatment, the blood concentration of methotrexate in 4 children were small and they were in a safe range , which could reduce the frequency of monitoring.ConcIusion This method is simple, sensitive and accurate for methotrexate detection in serum.The children with stable concentration and within safety range, can reduce monitioring frequency.It could bring the children less pain and relieve the burden of family.

Objective To investigate effect of glucose and lipid metabolism on acute cerebral infarction patients by Rhodiola injection. Methods 201 cases of acute cerebral infarction patients were selected,and divided into experiment group and control group.The control group of 101 cases were treated by clinical routine therapy,the experiment group 100 cases were treated with Rhodiola injection.The clinical efficacy, blood rheology and blood lipids, blood glucose index were compared before and after treatment.Results After 2 weeks of treatment, the total effective rate in experimental group was significantly higher than the control group(χ2 =12.596, P<0.05), with statistical difference.Patients in the experimental group,FBG was significantly lower than the control group, the difference was statistically significant (t=8.830, P<0.05).Patients in the experimental group TG, TC, LDL-C were significantly lower than that of control group, HDL-C was significantly higher than control group (P<0.05).Blood rheology indexes decreased significantly better than the control group ( P<0.05 ) .Conclusion Rhodiola injection on patients with acute cerebral infarction has good clinical curative effect, and can effectively improve the blood lipid, blood glucose level, reduce blood viscosity, is of great significance to the clinical treatment of cerebral infarction.

Objective To construct pEGFP-C1-HSP27 recombinant eukaryotic expression vector and establish human pancreatic cancer SW1990 cell line stably expressing HSP27.Methods RT-PCR was applied to amplify human HSP27 cDNA from human pancreatic cancer SW1990 cells with a pair of specific primers carrying a restriction enzyme site BamH Ⅰ or Hind Ⅲ on each 5' end.HSP27 cDNA was inserted into pEGFP-C1 vector and then identified by restriction enzyme digestion and sequencing.Successful constructed pEGFP-C1-HSP27 or empty vector was transfected into SW1990 cells by lipofectamine 2000,respectively.The location of HSP72 was determined by fluoroscopy,RT-PCR and Western blot was used to detect the expression of HSP27 in transfected cell.Results The DNA sequence of pEGFP-C1-HSP27 recombinant plasmid was completely correct,and it was successfully transfected into SW1990 cell lines and stably transfected SW1990 cell lines were obtained,which were confirmed by restriction enzyme and sequencing.The expression of EGFP was distributed in cytoplasm,the HSP27mRNA expression was significantly increased (1.458 ± 0.160vs0.897 ±0.051,P ＜0.05).In addition,it was showed that EGFP-HSP27 fusion protein was expressed.Conclusions The eukaryotic expression vector pEGFP-C1-HSP27 was constructed successfully and stably transfected SW1990 cell line expressing HSP27 was obtained.

Objective A discussion of practical models for auditing the prescription of parenteral nutrition by clinical pharmacists of nutrition.Methods A three-dimensional approach to prescription audit of parenteral nutrition by clinical pharmacists,focusing on the stability of the nutritional solution,its pharmacological rationality and the patient's individual need.Results Establishment of this three-dimensional approach.Conclusion This three-dimensional approach ensures the safety and rationality of parenteral nutrition and gives play to clinical pharmacists.

A novel system is proposed to control the liquid nitrogen cooling and radio frequency heating of tissue to achieve effective thermal ablation in the treatment using fuzzy logic controller and fuzzy logic PID type controller separately. Results of ex-vivo pig liver experiments demonstrate that this system is useful and could p control the desired treatment procedure.
Algorithms ; Animals ; Computer Simulation ; Cryotherapy ; instrumentation ; methods ; Electrocoagulation ; instrumentation ; methods ; Equipment Design ; Fuzzy Logic ; Liver ; Swine

Objective To investigate the efficacy and safety of the 12-week regimen with sofosbuvir and coblopasvir hydrochloride in the treatment of chronic hepatitis C (CHC) in northwest China. Methods This study enrolled 101 patients with CHC of any genotype who received sofosbuvir (400 mg) combined with coblopasvir hydrochloride (60 mg) for 12 weeks in The First Affiliated Hospital of Air Force Medical University, The Second Affiliated Hospital of Air Force Medical University, The Second Affiliated Hospital of Xi'an Jiaotong University, and Baoji Central Hospital from July 1 to December 31, 2021, among whom 13 had liver cirrhosis and 88 did not have live cirrhosis. Other antiviral drugs such as ribavirin were not added regardless of the presence or absence of liver cirrhosis or the genotype of CHC. Related clinical data ere extracted, including HCV RNA quantification and liver biochemical parameters at baseline, at week 12 of treatment, and at 12 weeks after drug withdrawal. The primary endpoints were sustained virologic response at 12 weeks after the end of treatment (SVR12) and safety at week 12 of treatment, and the secondary endpoint was the effect of the 12-week treatment on liver biochemical parameters. The non-normally distributed continuous data were expressed as M ( P 25 - P 75 ), and the Mann-Whitney U test was used for comparison between groups. Results A total of 101 patients were included in the analysis, among whom there were 55 male patients (54.5%) and 46 female patients, and the median age was 53 years. Among these patients, 12.8% had liver cirrhosis, 1.0% had liver cancer, 3.0% were treatment-experienced patients, and 3.0% had type 2 diabetes. As for genotype distribution, 8% had CHC genotype 1, 60% had CHC genotype 2, 19% had CHC genotype 3, and 6% had CHC genotype 6, and genotype was not tested for 7% of the patients. After 12 weeks of treatment, all 101 patients had a HCV RNA level of below the lower limit of detection and an SVR12 rate of 100%, with a significant reduction in the serum level of alanine aminotransferase (ALT) from baseline to week 12 of treatment ( P < 0.05). Among these patients, 22.7% had concomitant medications such as atorvastatin calcium, aspirin, metformin, nifedipine, bicyclol, and compound glycyrrhizin. The incidence rate of adverse events was 16.8%, and fatigue (12.9%) was the most common adverse event. Conclusion The 12-week treatment with sofosbuvir and coblopasvir hydrochloride can obtain high SVR12 in CHC patients in northwest China and has good antiviral safety, with a significant improvement in abnormal serum ALT at week 12 of treatment.