Methods for strengthening quality management of medical equipment is discussed. Facing so many management methods, medical engineering department should strengthen the support and management by setting standard management rules for medical equipment with the total cost control as the core. The concept of green service is proposed and discussed.

Protein transduction is an emerging technique in biological fields in recent years. Through the medium of protein transduction domain(PTD) composed by a small number of alkaline peptides, the functional proteins linked covalently with DNA, peptides, proteins or other macromolecules can across the membranes of mammalian cells, even the blood-brain barrier and transfer unconventionally that isn't like classical pathway. The distinct property of PTD that can take along fused protein entering into cells unconventionally offers a new vehicle to gene therapy for some diseases and has dulcet applied perspective.

Objective To observe the characteristics and onset time of seizures caused by kindling of bilateral amygdale, and to discuss its mechanism.Methods 40 adult Wistar rats were randomly assigned into bilateral amygdala kindling group and unilateral amygdala kindling group. The models were made according to Goddard's method. Results All the rats in bilateral amygdala kindling group developed stage Ⅴ convulsions after a mean of 20.9 stimulations.12 rats of which showed spontaneous seizure discharges. But in unilateral amygdala kindling group, the successful kindling rate was 60% after a mean of 8.9 stimulations. Comparing with unilateral kindling, bilateral amygdala kindling significantly increased the successful rate of kindling (P

Objective To study the liver X receptor(LXR)and the gene expression of cholesterol ester transfer protein(CETP),cyclooxygenase-2(COX2)in obstructive sleep apnea hypopnea syndrome(OSAHS)patients.Methods Macrophages were separated from the blood drawn in 30 cases of OSAHS patients and 30 healthy control subjects in the morning,RT-PCR gel eletrophoresis was used to determine the patterns of gene expression.Results OSAHS patients had higher LXR,COX2,CETP expression(P

Purpose　To explore the effects of antibiotics and herbs with removing pathogenic heat from blood on ovarian granulosa cell morphological and functions in female rats.　Methods　The granulosa cell of 30 d age SD female rats was collected,several drugs were added to the culture fluid.The culture fluid were collected to measure the sex hormone by radioimmunoassay.The cell organs of granulosa cell were measured by transmission electron microscope.　Results　Organs of the granulosa cell almost disappeared and perinuclear vesicle were founded in Amikacin sulfate group and Rhizoma zedoariae group.The progesterone levels were lower than in salline group (P<0.05).The estrogen levels of Amikacin group were lower than in saline group (P<0.05).　Conclusions　Ovarian function were obstructed in female rats when Amikacin,Rhizoma zedoariae were directly used.

Objective To strengthen and improve the information-based management of medical consumables.Methods Supported by No.1 Military Medical Project and based on computer technology and LAN,the self-developed Medical Consumables Supermarket-style Management System was utilized.Results The Medical Material Management System of No.1 Military Medical Project was improved and the working procedures were simplified with higher working efficiency.Conclusion Mistakes are reduced,the management of warehouse is improved and the accuracy of the data accuracy is ensured.

Objective To investigate the stabilization of betaine on the enzyme activity of ALT in human serum at different temperatures, and to evaluate the matrix effects of human serum with betaine among different analytical systems. Methods The enzyme activity of ALT in human serums with l mol/L betaine stored at 37 ℃, 25 ℃, 4 ℃ and - 20 ℃ respectively were measured. The matrix effect experiment was carried out according to the procedures specified in Clinical and Laboratory Standards Institute (CLSI)document EP14-A. Four analytical systems were the candidates for evaluation, and Roche Diagnostics (Roche)-Hitachi analytical system served as the reference system. The enzyme activity of ALT of 40 patient specimens and 3-level specimens ( high, medium and low) with 1 mol/L betaine were measured using the evaluated methods and the reference method respectively. The linear regression analysis was performed to compare the mean y value of 3-level specimens with the statistically defined limits ( the two-tailed 95% prediction interval) derived from 40 patient specimen data. Results The enzyme activity of ALT could be stabilized with betaine in serum, which remained to be 99% for 48 h at 37 ℃, 98% for4 d at 25 ℃, 97%for 4 weeks at 4 ℃, and 99% for 4 months at - 20 ℃. The enzyme activity of control serum decreased to 42%, 86%, 71%, 79% respectively. The mean y values of three specimens with the betaine were within the 95% prediction interval of the estimated mean y values, which suggested no obvious matrix effects in serum. Conclusion Betaine can be used in the development of enzyme ALT calibrator as its stabilizer.

Survivin-D53A (SVV-D53A) is a dominant-negative mutant survivin, which represents a potential promising target for cancer gene therapy. The present study was designed to determine whether SVV-D53A plasmid encapsuled by DOTAP: Chol liposome would have the anti-tumor activity against SPC-A1 lung adenocarcinoma, and to detect the possible mechanisms. In our experiment, SPC-A1 cells were transfected in vitro with SVV-D53A plasmid and examined for protein expression by Western blot, then flow cytometric analysis was used to detect apoptosis. SPC-A1 lung adenocarcinoma xenografts were established in vivo in the nude mice, which received the i. v. administrations of SVV-D53A plasmid/liposome complexes. After mice were sacrificed, the paraffin-embedded tumor tissue sections were used for proliferating cell nuclear antigen (PCNA) expression and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. Compared with the control group, the mice treated with SVV-D53A plasmid had an obviously reduced tumor volume, with high level of apoptosis and decreased cell proliferation in tumor tissue. The research results proved that the administration of SVV-D53A plasmid resulted in significant inhibition of SPC-A1 cells both in vitro and in vivo. The functional mechanism is that the anti-tumor response causes and induces tumor cell apoptosis.
Adenocarcinoma ; pathology ; Animals ; Apoptosis ; Apoptosis Regulatory Proteins ; metabolism ; Cell Line, Tumor ; Cell Proliferation ; Heterografts ; Humans ; Inhibitor of Apoptosis Proteins ; metabolism ; Liposomes ; Lung Neoplasms ; pathology ; Mice ; Mice, Nude ; Neoplasm Proteins ; metabolism ; Neoplasm Transplantation ; Plasmids ; Transfection ; Tumor Burden

Objective To investigate the effect of gender factors on the reduction of ischemia-reperfusion (I/R) injury by sevoflurane postconditioning in isolated rat cardiomyocytes. Methods Sixty 2-month-old SD rats (30 male, 30 female) were used in this study. Male rats were randomly assigned into 2 groups (n = 15 each):control group (group MC) and sevoflurane postconditioning group (group MS). Female rats were also randomly assigned into 2 groups (n= 15 each): control group (group FC) and sevoflurane postconditioning group (group FS).The rats were anesthetized with intraperitoneal pentobarbital 60 mg/kg. Their hearts were excised and perfused in a Langendorff apparatus with K-H solution saturated with 95% O2-5% CO2 at 37 ℃. I/R was produced by 40 min of global ischemia followed by 120 min of reperfusion. Control groups received perfusion with K-H solution saturated with O2 . Sevofiurane postconditioning groups received 10 min of perfusion with K-H solution saturated with 3%sevoflurane and O2 and then 110 min of perfusion with K-H solution saturated with O2 . HR, left ventricular enddiastolic pressure (LVEDP) and left ventricular developed pressure (LVDP) were measured before ischemia and during reperfusion. Coronary effluent was collected at 5 min of reperfusion for determination of LDH activity and infarct size. The total Akt (t-Akt) and phosphorylated Akt (p-Akt) expression in cardiomyocytes was detected. The ratio of p-Akt to t-Akt (p-Akt/t-Akt) was calculated. Results LVDP, p-Akt expression and p-Akt/t-Akt were significantly higher, LVEDP and LDH activity were significantly lower, and the infarct size was smaller in group MS and FC than in group MC (P ＜ 0.05). LVDP was significantly lower, LVEDP and LDH activity were significantly higher, and the infarct size was larger in group FS than in group MS. There was no significant difference in LVDP and LVEDP between group FC and FS (P ＞ 0.05). Conclusion There are gender differences in the reduction of I/R injury by sevoflurane postconditioning in isolated rat cardiomyocyes, the protective effect is stronger in male rats than in female rats, and the differences may be related to the activation of Akt.

Objective To understand the levels of plasma endothelin (ET) and calcitonin gene-related peptide (CGRP) in cough variant asthma(CVA) patients, and to investigate their correlation and clinical implications. Methods Thirty CVA patients,30 typical bronchial asthma patients and 25 healthy controls were recruited. Three milliliter limosis venous blood were drawn from each patient to measure the levels of plasma ET and CGRP by radioimmanity. Results ①The levels of ET in the CVA group and typical bronchial asthma group were higher than that in healthy controls (P < 0.01). Their values were (103.58±28.66) ng/L, (129.37±27.28) ng/L and (72.63±21.52)ng/L, respectively. The levels of CGRP in the CVA group and typical bronchial asthma group were (7.62±2.56) ng/L and(6.63±2.09)ng/L The level of CGRP in the healthy controls group was (21.60±3.29) ng/L. The first two groups were lower than the latter(P < 0.01). However, there was no significant difference between the CVA group and typical bronchial asthma group(P >0.05). ②ET and CGRP were negatively correlated in both CVA group(r= -0.819,P<0.05) and typical bronchial asthma group(r= -0.738,P<0.05). Conclusions ET and CGRP were negatively correlated in both CVA group and typical bronchial asthma group, which means that ET and CGRP were a couple of antagonistic factors participated in the regulation of CVA, and may play an important role in the process of CVA.