Objective To utilize the PBL method for the teaching reform of pedodontics lesson in Zhengzhou University. Methods Dental students of 2004 grade of Zhengzhou University were divided into 2 groups randomly,one group of which were taught with PBL method while the other group with traditional teaching method. The teaching effect was measured with questionnaire survey and examination. Result The PBL method was welcomed by undergraduate students and there was statistical significant difference between the examination scores of the two groups (P

Objective To investigate the prevalence, clinical characteristics and antibiotic resistance of Haemophilus influenzae (HI) in children with acute respiratory tract infection in Suzhou. Methods Data of sputum culture of 3 167 hospitalized childhood patients with acute respiratory tract infection from January 2006 to December 2007 were collected. The incidence of positive HI and the rate of resistance to different antibiotics were calculated and beta-lactamases of the strains were detected. Results About 4.4% of total 3 167 eases were infected with HI. The infection rate was related with season and sex, more frequent between February and June, more common in boys than girls. Children younger than three years old were likely to be infected by HI, eompared with other age groups. The beta-lactamase positive rate of HI was 31.4%. The resistance rates to ampicillin, SMZ + TMP, chloramphenicol, cefaclor, ceftazidime, tetracycline and ampicillin/sulbactam were 29.6% ～ 31.9%, 66.2% -73.9%, 19.7% ～ 15.9%, 2.8% ～ 14.5%, 2.8% ～0、 28.2% ～ 2.9% and 4.2% ～ 1.4% respectively. Isolates resistance to cefuroxime、 ceftriaxone、 imipenem、azithromycin and ciprofloxacin were not found. Conclusions The infection of HI in children with actue respiratory tract infection is closely related with season and sex in Suzhou. Children younger than three years old are at high risk. The beta-lactamase positive rate of HI was high and increased rapidly. Resistance rate to azithromycin, SMZ + TMP and chloramphenicol was high, some isolates were resistant to the second, third generation of cephalosporin. Monitoring the antibiotic resistance of H! should be emphasized.

Objective To discuss the effective measures for skin allergy caused by hyaline mem-brane after deep venous catheterization. Methods Patients (102 eases) were divided into the control group(50 cases) and the test group(52 cases).3M hyaline membrane was patched on the skin directly to fix the catheter after successful puncture in the control group.While in the test group 3M hyaline membrane was patched on the skin after 3M painless protective membrane was sprayed on the skin. Results The incidence of skin allergy in the test group was lower than that of the control group. Conclusions Spray of 3M painless protective membrane before usage of hyaline membrane to fix the catheter could prevent the incidence of skin allergy after deep venous catheterization.

Objective To construct HaCaT cell lines stably expressing the wild type human GJB6 gene or its mutant by using a Tet-On lentiviral vector, and to lay an experimental foundation for studies on pathogenesis of hidrotic ectodermal dysplasia. Methods The wild-type human GJB6 gene and its mutant (A88V)were amplified by PCR, and then inserted into the Tet-on lentivirus plasmid to construct recombinant lentivirus vectors. The recombinants were identified by gene sequencing and enzymatic digestion. Cultured HaCaT cells were classified into three groups to be transfected with a negative control lentiviral vector (NC group), the lentivirus vector expressing the wild-type human GJB6 gene (WT group), or the lentivirus vector expressing the mutant human GJB6 gene (MU group). Puromycin was used to select HaCaT cell clones stably expressing the GJB6 gene which encodes the connexin 30 (Cx30)protein. The selected HaCaT cell clones were cultured with or without tetracycline for 48 hours, thereafter, real-time PCR(RT-PCR) was performed to detect GJB6 gene mRNA expression, Western-blot analysis to measure expressions of Cx30 and FLAG-tag proteins, and cell counting kit 8 (CCK8)assay to evaluate cellular proliferative activity. Results Enzymatic digestion and gene sequencing showed that recombinant lentivirus plasmids were successfully constructed. RT-PCR showed evidently increased mRNA expression of the GJB6 gene in stably transfected HaCaT cells. Moreover, the expression abundance of the GJB6 gene was 112.369 times higher in the WT group induced by tetracycline than in that without tetracycline treatment (P < 0.05), and 2.249 times higher in the MU group induced by tetracycline than in that without tetracycline treatment (P < 0.05). Western-blot analysis showed that Cx30 and FLAG-tag proteins were stably expressed in the WT group and MU group after induction with tetracycline, while neither of them was observed in the WT group or MU group without tetracycline treatment, or in the NC group. Significant differences were noted in cellular proliferative activity (expressed as the absorbance value at 450 nm)between the MU group with and without tetracycline treatment and between the WT group with and without tetracycline treatment at 4, 8, 12, 24, 36 and 48 hours (all P <0.05), but not between the NC group with and without tetracycline treatment at any of the above time points (all P >0.05). Conclusion HaCaT cell lines which stably express the wild-type GJB6 gene or its mutant(A88V)are successfully constructed.

Because the medical treatment mode is being transformed into 'patients as orientation',our hospital introduces queuing system,transformsand redesigns programs of registration system,outpatient doctor workstation system,outpatient charge system and outpatient dosage system.By using liquid crystal display and automatic phonetic call,the outpatient procedure is optimized with a friendly service environment so as to improve the work efficiency and enhance the overall administration and service quality.

Objective To solve the problem that traditional electronic medical records(EMR) system could not be extended to patients' bedside because of the wired network connection restrictions.Methods Based on wireless transmission and data synchronization technologies in PDA,a mobile nursing station was developed.Results Such functions were realized as patient identity verification,implementation of doctor's orders and vital signs collection beside patients' bed.Conclusion Technical support is provided for closing EMR information chain and improving medical quality.[Chinese Medical Equipment Journal,2008,29(2):53-54]

Objective To explore the epidemiologic and clinical features of hand, foot and mouth disease (HFMD) caused by Coxsackie virus A16 (CA16) in Suzhou from 2010 to 2014, and analyze the relationship between the SNPs of oligoadenylate synthetase 1 (OAS1) and HFMD caused by CA16 infection.MethodsThe clinical data of children diagnosed with HFMD caused by CA16 during 2010 and 2014 were collected. The epidemiological characteristics were analyzed. Among them, 167 cases were selected to make comparison of the clinical features with 166 cases of HFMD caused by EV71 infection in the same period. The genotyping ofOAS1 rs10774671 was detected by TaqMan probe technique in 167 cases of CA16 infection children, 166 cases of EV71 infection children with HFMD and 163 healthy children. The relationship between polymorphism of gene and infection of CA 16 was analyzed.ResultsA total of 9 016 children with HFMD were included. CA16 nucleic acid detected to be positive in 762 cases. The detection rate was 8.45%. CA16 infection was most commonly in summer. Children under 5 years old accounted for 94.62% infected. Compared with EV71 infected children, CA16 infected children had shorter fever time, severer oral herpes, ulcer, and rash in hand, foot and hip, lesser nervous system involvement, fewer cases of high lactate dehydrogenase, high C reactive protein, high IgM or IgG, and signiifcant changes in the percentage of CD3+, CD3+CD4+, CD3+CD8+ and CD3-CD19+ (P all?

BACKGROUND: As a new radiotherapy for malignant tumor, brachytherapy of radioactive seed implantation enables the inter-tissue implantation of radioactive seeds to be applied further with the appearance of seed implantation treatment planning system (TPS), and the gradual consummation of ultrasound and CT-guided precise positioning system.OBJECTIVE: To evaluate the methods, feasibility, safety and efficacy of CT-guided iodine-125 (125I) implantation for malignant tumors.DESIGN: A controlled observation before and after implantation.SETTING: The First People's Hospital of Hefei City.PARTICIPANTS: Twenty-one patients with malignant tumors, who were not suitable for surgical treatments of operation,were selected from the First People's Hospital of Hefei City from January 2004 to March 2005. There were 26 lesions, including 9 lesions of primary unresectable carcinoma and 17 lesions of metastasis tumors.METHODS: Under CT guidance, 125I seeds were implanted into malignant tumor according to TPS, the radioactivity quantum were 22, 26, 30 and 33 MBq per granule. Larger radiation 125I wes suitable for the implantation in the center of a lesion and smaller ones were for the margin of the lesion and the peripheral region of some important organisms such as vessels and nerves. The interval between larger seeds was about 1.5 cm whereas the interval between smaller ones was about 1.0 cm.MAIN OUTCOME MEASURES: The seed distribution, existence of complication and changes of the size of lesion after implantation were observed.RESULTS: ① The seeds were implanted successfully in all the 21 cases. No complication was observed. The practical distribution of the implanted seeds was basically the same as the scheduled scheme before implantation. All the 21 patients were involved in the analysis of results. ② The number of seeds implanted in one lesion was 5 to 40 (mean 14).Pain relief was obtained in all 10 cases of malignant tumors of bone after implantation. Follow-up CT reexamination demonstrated that 18 lesions were obviously diminished, necrosis was found in 4 lesions and remaining 4 lesions had no significant changes in size. ③ The average sizes of 14 lesions in 11 patients at 5-7 months after implantation were obviously smaller than those before implantation (1.84 cm vs 3.41 cm, t =5.7237, P ＜ 0.001). The average sizes of 12 lesions in 10 patients at 8-10 months after implantation were also obviously smaller than those before implantation (1.96 cm vs 3.43 cm, t =5.577 8, P ＜ 0.002).CONCLUSION: CT-guided 125I implantation is a safe, effective and feasible method for the treatment of malignant tumor.

Objective:To explore the effect of coronary injection of recombinant human prourokinase (rhPro-UK) during PCI for ST-segment elevation acute myocardial infarction (STEMI) patients.Methods:A total of 124 STEMI patients treated in Tangshan Gongren Hospital, Hebei Province from November 2018 to November 2019 were selected as the research objects.They were simply randomized by random number table method into the observation group(63 cases) and the control group(61 cases). Thrombus aspiration was used.The control group was treated with 25 μg/kg tirofiban, and the observation group was injected with 20 mg rhPro-UK into the coronary arteries.After that, both groups underwent emergency PCI treatment.The bleeding degree, myocardial microcirculation indexes, plasma fibrinolytic factor changes, vascular recanalization, ST segment fall of electrocardiogram and changes in left ventricular end diastolic diameter (LVEDD), left ventricular end systolic diameter (LVESD), left ventricular ejection fraction (LVEF), cardiac index (CI) were recorded.Results:The peak value of creatine kinase isoenzymes MB (CK-MB) (184.64±21.47) U/L and the peak time of CK-MB (14.32±2.02) h in the observation group were significantly lower than those in the control group((258.94±31.64) U/L, (16.58±2.09) h), the differences were statistically significant ( t=15.345 and 6.123, all P<0.001). After treatment, human tissue plasminogen activator (t-PA) (0.85±0.28) kU/L in the observation group was significantly higher than that in the control group (0.74±0.24) kU/L, human plasminogen activator inhibitor (PAI-1) (0.16±0.05) kU/L.compared with the control group (0.32±0.08) kU/L significantly decreased ( t=2.345, P=0.021; t=13.401, P<0.001); 77.78% (49/63) of the ST-segment complete fall in observation group was significantly higher than 54.10% (33/61) of the control group ( Z=7.758; P=0.005), and 4.76% (3/63) in the observation group without a fall in ST segment was significantly lower than 19.67% (12/61) of the control group ( Z=6.480; P=0.011). The LVEDD at 7 days, 14 days and the LVESD at 7 days and 14 days in the observation group were (49.37±3.14) mm, (48.34±3.03) mm, (33.19±2.23) mm and (32.05±2.23) mm respectively, which were significantly lower than those in the control group at 7 days, (50.64±3.03) mm, (49.66±2.83) mm, (34.86±1.73) mm and 14 days, (33.74±1.97) mm respectively ( P<0.05 or P<0.001). The LVEF of 7 days and 14 days after treatment were (56.32±4.97)% and (59.23±5.11)%, which were significantly higher than those of the control group (54.46±4.87)% and (57.18±4.33)% ( P<0.05 or P<0.001). CI at 7 days and 14 days after treatment were (3.65±0.22) L/ (min·m 2) and (3.76±0.21) L/(min·m 2), which were significantly higher than those of the control group (3.48±0.25) L/(min·m 2) and (3.56±0.24) L/(min·m 2)( P<0.05 or P<0.001). Conclusion:STEMI patients treated by intraoperative coronary injection of Rhpro-UK versus tirofeban, can further improve the total bleeding rate and the vascular recanalculation rate, and also significantly improve plasma fibrinolysis factor, myocardial microcirculation and cardiac function.This provides an alternative to the treatment of myocardial infarction in patients with STEMI.

Objective:To evaluate the effect of paclitaxel on the mast cell-CCL2-macrophage axis in rats with pulmonary hypertension.Methods:Thirty SPF-grade healthy male Sprague-Dawley rats, aged 8-10 weeks, weighing 180-220 g, were divided into 3 groups ( n=10 each) using a random number table method: control group (group C), pulmonary hypertension group (group PH), and paclitaxel group (group PTX). The model of pulmonary hypertension was established by subcutaneous injection of monocrotaline 60 mg/kg in rats.At 25 days after establishing the models, paclitaxel 2 mg/kg was injected via the tail vein once every four days, for 4 times in total in group PTX.The equal volume of normal saline was injected in the remaining 2 groups.The mean pulmonary artery pressure (mPAP) was performed at 40 days after establishing the model.The heart was removed and dried, the right ventricle (RV) and left ventricle plus ventricular septum (LV+ S) was weighed, and the Fulton index [RV/(LV+ S)] was calculated.The inferior lobe of left lung was taken, the ratio of media wall thickness of pulmonary vessels was calculated by HE staining, the number of Tryptase + , CD68 + , CD163 + , and Ki67 + cells was recorded by immunohistochemistry, the mean value was calculated, the percentage of Ki67-positive cells in blood vessels was recorded, and the proportion of muscularized blood vessels was calculated.The content of CCL2 was measured by enzyme-linked immunosorbent assay, and the expression of cleaved caspase-3 and Cyclin D1 was detected by Western blot. Results:Compared with group C, the mPAP, Fulton index, ratio of media wall thickness, proportion of muscularized blood vessels, the number of Tryptase + , CD68 + and CD163 + cells and percentage of Ki67 + cells were significantly increased, and the expression of cleaved caspase-3 was down-regulated in PH and PTX groups ( P<0.05), the expression of Cyclin D1 was significantly up-regulated in group PH ( P<0.05), and no significant change was found in group PTX ( P>0.05). Compared with group PH, the mPAP, Fulton index, ratio of media wall thickness, percentage of muscularized blood vessels, the number of Tryptase + , CD68 + and CD163 + cells and percentage of Ki67 + cells were significantly decreased, the expression of CCL2 and Cyclin D1 was down-regulated, and the expression of cleaved caspase-3 was up-regulated in group PTX ( P<0.05). Conclusion:The mechanism by which paclitaxel alleviates pulmonary hypertension is related to inhibiting the mast cell-CCL2-macrophage axis in rats.