Effective loading and site-specific delivery of growth factors to regulate the cell growth on scaffold is one of the key issues of tissue engineering. Polymeric nanoparticle is one of the candidate carriers for carrying growth factors. This article attempts to introduce the biological characteristics of growth factors commonly used in tissue engineering, polymer materials for carrying the growth factors and the preparation of the nanoparticles and delivery systems. The advantages and disadvantages of different preparations are also discussed to facilitate the selection of the appropriate methods and materials. Relevant research progress and application potentials are discussed ss well.

The study applied the model of authorized leadership to emergency night nursing in large general hospitals in order to explore the effect of such management. As it turned out, the evaluation of the administrators means of authorization by the three groups of research subjects averaged respectively 20 70,20 62 and 20 05, and the evaluation of the effect of authorization averaged respectively 79 80,78 39 and 83 55. The results indicate that the administrators means of authorization were basically rational and sound and the managerial abilities of those with authorized leadership were appreciated by the emergency night doctors and nurses. Thus management of emergency night nursing by those with authorized leadership may lead to improved efficiency and quality.

Humans ; Interleukin-33 ; Interleukins ; Liver Cirrhosis

A novel ionization enhancer, methylamine formate, was proposed for improving the detection sensitivity of triglyceride in edible oil by reversed phase liquid chromatography electrospray ionization mass spectrometry (LC-ESI-MS).The commonly used isopropanol-acetonitrile-methanol-water and isopropanol-acetonitrile were selected as the mobile phase.By using a reversed phase C18 column, and taking the corn oil in isopropyl alcohol as sample solution, we compared methylamine formate with ammonium formate, as ionization enhancers, for their effect on the detection sensitivity of triglyceride by LC-ESI-MS after screening other different ionization enhancers, such as formic acid, acetic acid, ammonium formate, ammonium acetate, butyl formate, dibutylamine formate, triethylamine formate, diethylamine formate, methylamine formate, and ethylamine formate.The result indicated that, by using methylamine formate, the mass spectral peak response and the signal to noise ratio for trilinoleic glyceride component were 5 times higher than that of ammonium formate.The effect of the concentration of methylamine formate ionization enhancer, the flow rate of the mobile phase and the flow rate of nebulizing gas on the detection of methylamine formate were investigated.The concentration of triglyceride components in corn oil starting to form aggregates was similar in different mobile phases in the electrospray process according to measurement of the relationship between corn oil concentrations and the total ion chromatogram peak area of triglyceride.In particular, the peak area of trilinolein was linear with its concentration in the range of 7×10-7-2×10-4 mol/L (R2=0.9997), but increased slower in the higher concentration range.According to the experimental data, the mechanism for improvement of detection sensitivity of methylamine formate was suggested as that the addition of methylamine mono-charged ions with hydrophobic groups had lower solvation energy, which made the enriched addition ions easily evaporation from the droplet surface, thus improving the electrospray ionization efficiency.This method provided an effective way to improve the detection sensitivity of triglyceride in edible oil by LC-ESI-MS.

OBJECTIVE To investigate the common pathogens and predisposing factors of postoperative pneumonia in patients with chest tumor.METHODS The data of 279 cases of postoperative pneumonia for open chest surgery were analyzed retrospectively.RESULTS The prevalence of postoperative pneumonia for open chest surgery were mainly due to Gram-negative bacteria(41.4%).Gram-positive bacteria and fungis weighed 32.6% and 26%.The risk factors of postoperative pneumonia in chest tumor were aged,severe underlying disease, use of broad-spectrum antibiotics,surgery trauma,mechanical ventilation and invasive treatments patients.CONCLUSIONS It is very important to enforce the preoperative comprehensive management of open chest operation in order to reduce the incidence and mortality of postoperative pneumonia in chest tumor.

Objective To introduce the nursing care of severe asthma patients treated by sedatives and muscle relaxants combined with mechanical ventilation. Methods Nurses with more than 3 years of working experiences in respiratory intensive care unit participated in the nursing care,such as ventilation monitoring,sedative effect assessment and artificial airway management. Results All the 18 patients were treated successfully,and the duration of mechanical ventilation ranged from 6 to 192 hours. The indicators of circulation and arterial gas after weaning were improved significantly (P<0.01). Conclusion Proper nursing care and correct sedative effect assessment is an important point to ensure treatment efficacy and reduce complications for severe asthma patients treated by sedatives and muscle relaxants combined with mechanical ventilation.

In order to improve health management efficiency and decision-making level, regional health decision support system is constructed based on regional health information platform and business intelligence ideas.Technical plan, construction contents and ap-plication examples in health management are introduced in the paper.

Objective:To explore the closed fog mirror in evaluation of velopharyngeal incompetence. Methods:A self-developed closed fog mirror was and used to evaluate for the velopharyngeal compentence and to determine the extent of velopharyngeal compentence according to the map on the fog mirror from nasal air emission and to grade the velopharyngeal compentence from the shape and size of the fog on the mirror. Then choose the right treatment method: speech therapy or pharyngoplasty. Results:The closed-fog-mirror determined different types of velopharyngeal compentence. Conclusion:The closed fog mirror is simple and objective in evaluation of velopharyngeal incompetence.

Objective To analyze the relationship among HIF-1α, ERCC1 gene polymorphisms and the effects of platinum-based chemotherapy for the treatment of advanced non-small cell lung cancer (NSCLC) Methods HIF-1α C1772T and ERCC1 C118T loci were genotyped with PCR-RFLP method. The relationship between genotypes and the outcome of treatment as well as TTP was investigated. Results HIF-1α and ERCC1 of 102 patients were under the Hardy-Weinberg equilibrium. Patients with HIF-1α CT+TT genotype showed a significantly higher chemotherapeutic efficiency compared with patients with CC genotype; Patients with ERCC1 CC genotype showed a significantly higher chemotherapeutic efficiency compared with patients with CT+TT genotype. The median TTP was 7.0 months for the 98 patients followed-up; 7.0 months for HIF-1α CT+TT genotype, and 6.0 months for CC genotype, and the difference showed no significance; The median TTP was 7.0 months for ERCC1 CC genotype, and 6.0 months for CT+TT genotype, and the difference was statistically significant. Conclusions Patients with HIF-1α CT+TT genotype or ERCC1 CC genotype have showed higher chemotherapeutic efficiency, and patients with ERCC1 CC genotype show longer median TTP.

Objective: To compare the different therapeutic effects of acupuncture and Phenolphthalein for constipation due to intestinal qi stagnation. Methods:A total of 50 patients with constipation due to intestinal qi stagnation were randomly divided into an acupuncture group and a medication group by the random digital table, 25 cases in each group. The patients in the acupuncture group were treated by puncturing Gongsun (SP 4), Sanyinjiao (SP 6), Taichong (LR 3), Zusanli (ST 36), Shangjuxu (ST 37), Hegu (LI 4), Lieque (LU 7), and Tianshu (ST 25), once every day, and 7 d as one course, for continuous 3 courses; while the patients in the medication group were given Phenolphthalein, 7 d as one course, for continuous 3 courses. Compared the Cleveland clinic constipation score (CCS) between the two groups after one course, 3 courses and 3 months after the treatment, as well as the frequency of defecation within one week. Results:After one week of treatment, CCS scores and frequency of defecation per week were significantly changed in both groups compared with those before treatment (P<0.05), and CCS scores and frequency of defecation per week were improved more significantly in the patients of the medication group than in those of the acupuncture group (P<0.01). After 3 weeks of treatment, CCS scores and frequency of defecation per week were significantly changed in both groups compared with those before treatment (P<0.05), and CCS scores and frequency of defecation per week were improved more significant in the patients of the acupuncture group than in those of the medication group (P<0.05). Three months after the end of treatment, CCS scores and frequency of defecation per week were significantly changed in both groups compared with those before treatment (P<0.05), and CCS scores and frequency of defecation per week were improved more significantly in the patients of the acupuncture group than in those of the medication group (P<0.05). Conclusion:Acupuncture and medication are effective in the treatment of constipation due to intestinal qi stagnation. Their short-term therapeutic effect is similar, but the long-term therapeutic effect is better in the acupuncture group than in the medication group.