Objective To appraise the safety and validity of early enteral nutrition on the course on treating severe acute pancreatitis(SAP).Methods The clinical data of 71 patients with SAP were analyzed retrospectively. The album, prealbumin, TNF-β,CD4/CD8,IgG were observed. All the patients were randomly divided into two groups: enteral nutrition(EN)group for 36 patients and total parenteral nutrition(TPN)group for 35 patients. Results Fourteen days after treatment,CD4/CD8 and IgG in EN group were significantly increased than those in TPN group(P＜0.05),and prealbumin level in EN group significantly elevated(P＜0.05)and was higher than that in TPN group(P＜0.05).After treatment,TNF-α level in EN group significantly depressed(P＜0.05)and was lower than that in TPN group(P＜0.05).Conclusion Early enteral nutrition is safe and valid, and can promote albumin synthesis and prealbumin levels to improve their nutrition in patients with SAP, and may build-up the barrier of enteric mucosa to prevent bacterial shift, reduce systemic inflammatory reaction and improve its prognosis.

Objective To design a new method of posterior wall reconstruction for severely corn-minuted and obsolete fracture of the posterior wall of the aeetabulum. Methods (1) Biomechanical study (from two perspectives: the stability and the stress distribution on the femoral head and the acetabu-lure) : six fresh adult' s pelvis and femur specimens were collected and divided into experimental group ( consisted of the left sides) and control group ( consisted of the right sides). After the defects of the pos-terior wall were made, the defects were anatomically reconstructed with the harvested ilium by acetabular tridimentional memory fixation system (ATMFS) in the experimental group, whereas the acetabular frag-ments were repositioned to the defect sites and fixated by the plates and screws in the control group. Lon-gitudinal and latitudinal displacement, stability of the anatomically reconstructed posterior wall of the ace-tabulum, the fitness of femoral head to the acetabulum after anatomical reconstruction and mean and maxi-mum pressure of anterior wall, posterior and cupuh of the acetabuhm were analysed and compared. (2) Cinical study: The posterior wall defect on the harvested ilium piece was repaired with 3-directional loc-king of ATMFS in 10 male patients (at age of 16-50 years, mean 36.4 years) from January 2000 to June 2002. There were seven patients with flesh acetabular fractures and three with old acetabular fractures.The period from fracture to reconstruction for the patients with old fractures was 58-251 days ( 137.7 days an average). The patients were foUowed up for 5.8 years (average 5.2-7.1 years). Results (1) Biomechanical study showed no statistical difference upon stability and fitness of femoral head to acetabu-lum after reconstruction in experimental and control groups. (2) Clinical study: postoperative X-ray film showed no repeated displacement of the fracture and the patients began out-of-bed movement with weight bearing after 1.6 months (1.2-2.1 months). Heterotopic ossification was found in two patients, with no influence on the joint function. According to the elinieal ranking standard of Modified d' Aubigne and Postal, the excellence rate was 93%. Conclusions Anatomical reconstruction of posterior wall of the acetabulum by using serf ilium with ATMS has good stability and stress distribution of the femoral head and the reconstructed acetabulum in clinical application and offers a new method for treatment of severely comminuted and obsolete fracture of posterior wall of acetabulum.

Purpose/Significance To put forward strategies for the open sharing of biomedical scientific data and provide theoretical support for the sustainable development of scientific data in China.Method/Process The paper adopts the multiple-case study method to analyze open sharing practices of four international typical biomedical scientific data platforms,including UK Biobank,National Center for Biotechnology Information(NCBI),Global Initiative on Sharing All Influenza Data(GISAID)and Cortellis Drug Discovery Intelli-gence(CDDI).Result/Conclusion Suggestions are proposed based on three processes of before,during and after data sharing.In the construction of data resources,the division of data rights and rights subjects should be determined.The open use of data should be differ-entiated according to data attributes.In terms of data ecology construction,mechanisms and measures to promote data value-added should be formulated.

Objective:To explore the feasibility of preparing an iodine-coated titanium plate with potassium iodide and verify its antibacterial performance.Methods:Iodine was coated onto the surface of a titanium plate in electrolyte of potassium iodide using the electrophoretic deposition method. The signs and composition of the surface of the iodine-coated titanium plate were observed by scanning electron microscopy and energy dispersive spectroscopy. The experiment was conducted in a control group and 3 antibacterial test groups. The control group consisted of 10 titanium plates which had been pretreated but not loaded with iodine; the 3 experimental groups also had in each 10 titanium plates which had been pretreated and loaded with iodine in the electrolytes of concentrations of 1,000 mg/L, 2,000 mg/L and 4,000 mg/L, respectively. The antimicrobial tests in vitro were conducted with standard strains of staphylococcus aureus [1×10 6 Colony-Forming Units (CFU)/mL ATCC25923] to determine the antibacterial property of the plates. Results:The iodine-coated titanium plates appeared grey and their surface was evenly covered with a flat coating with no collapse. The scanning electron microscopy observed on the surface of the iodine-coated titanium plates an iodine coating with scattered irregular collapses in different sizes. The iodine content was 0 mass%, 5.10 mass%, 10.32 mass% and 15.05 mass%, respectively, in the control, 1,000 mg/L, 2,000 mg/L and 4 000 mg/L groups under the energy dispersive spectroscopy. Their counts of in vitro antibacterial colony were 56.00±5.09, 21.40±2.76, 9.10±2.51, and 2.00±1.88, respectively, showing significant differences between groups ( P< 0.05). Conclusions:A titanium plate with a steady and even iodine coating can be prepared by virtue of the electrophoretic deposition method in electrolyte of potassium iodide. The antibacterial property of an iodine-coated titanium plate is superior to that of a titanium plate without iodine coating.

Objective:By reviewing the new requirements of NIH Policy for Data Management and Sharing (DMS Policy) issued by the National Institutes of Health in 2020 and summarizing the trends of scientific data management and sharing in the future, this study provided enlightenment and reference for China to improve the construction of scientific data management policy system and promote the practice of biomedical scientific data sharing.Methods:Using a comparative historical approach, this study compared the two editions of DMS policy published in 2003 and 2020 from the aspects of policy structure and policy contents.Results:The new DMS policy presented the following trends: mandatory data sharing, high-quality data submission, prospective data management, and intensified privacy protection.Conclusions:According to the national conditions of China, this paper put forward the following suggestions: promoting mandatory data sharing led by research funders, improving the quality evaluation system for scientific data submission; forming a prepositioned data management and sharing mode; and developing guidelines for secure sharing and use of data derived from human participants.