Graphene and its derivatives have unique physical,chemical and biological properties,such as antibacterial property,promoting osteogenesis,increasing the wear resistance of composite materials,etc.It has broad application prospects in biomedicine and tissue engineering.The application and research progress of graphene and its derivatives in orthopedics were introduced,in order to provide theoretical basis for the future clinical and fundamental research.

Objective To explore the establishment and evaluation of various forms of complementary transfer. Methods The former method using the traditional handover method, the establishment of various forms of complementary shift model improved, including optimized bedside handover, handover of patients′ bedsore image and emotional barometer over emotional changes, establish WeChat group to observe improvement;the first two months (99 cases, monitoring 42 days) and the improvement after the six months (97 cases, monitoring 43 days) score of nurses for the patient to grasp, bedside shift time and transfer the missing information. Concrete research and implementation methods, research objects, sample size, measurement indicators, evaluation methods, etc. Results Both shift mode, there is no information on patients admitted to general statistical difference (P>0.05);under complementary shift mode, nurse the patients′ condition from the master score (80.95 ± 4.30) points increased to (84.88 ± 4.01) points, in which the patients′condition data mastery score from (40.81 ± 2.02) points increased to (44.16 ± 2.88) points, nursing problems and measures of control points value from (13.21 ± 1.54) points increased to (14.44 ± 1.72) points, the difference was statistically significant (t =4.362, 6.209, 3.462, P<0.01);general information master score, treatment information at its disposal no difference scores statistically significant (P>0.05). Bedside nurse shift change time decreased from former improvements (31.21 ± 2.63) minutes to (14.42 ± 2.40) minutes, and the difference was statistically significant (t=30.767, P=0.000). Shift nurse missing information dropped from 16 times to 7 times, the difference was statistically significant (χ2=5.124, P=0.024). Conclusions Complementary model can reduce the insufficiency of current clinical succession work, help nurse master the patients′physical and mental conditions and more comprehensive understanding of the ward, reduce the omission or missing information and improve the working efficiency and responsibility.

Objective To compare the efficacy of laparoscopic or open surgery for gastrointestinal stromal tumors (GISTs) and investigate effects of different risk level on prognosis.Methods The retrospective cohort study was adopted.The clinical data of 192 patients with GISTs who were admitted to Zhongshan Hospital of Fudan University from January 2008 to December 2013 were collected.Among the 192 patients,88 undergoing laparoscopic surgeries were allocated into the laparoscopic surgery group,104 patients undergoing open surgeries were allocated into the open surgery group.The following indicators were observed:(1) operative status:surgical procedure,operation time,volume of intraoperative blood loss.(2) Status of postoperative recovery:time of gastrointestinal function recovery,time of drainage tube removal,complications and duration of hospital stay.(3) Follow-up status.(4) Prognosis of patients in different risk level.The follow-up using outpatient examination and telephone interview was performed to assess patients' survival,tumor recurrence and metastasis until June 2015.Measurement data with normal distribution were presented as (x) ± s and comparison between groups was evaluated by the t test.Comparison of count data was analyzed by the chi-square test.The Kaplan-Meier method was used to draw survival curve and calculate the overall survival rate and relapse-free survival rate.Results (1) Operative status:of the 88 patients in the laparoscopic surgery group,1 underwent laparoscopic wedge gastrectomy + cholecystectomy + appendectomy,6 underwent laparoscopic wedge gastrectomy + cholecystectomy,14 underwent laparoscopic assisted partial gastrectomy,67 underwent laparoscopic wedge gastrectomy.Of the 104 patients in the open surgery group,1 underwent partial gastrectomy + splenectomy,2 underwent partial gastrectomy combined with distal pancreatectomy + splenectomy,2 underwent total gastrectomy,7 underwent distal subtotal gastrectomy,7 underwent wedge gastrectomy + partial or total adjacent organ resection,8 underwent proximal subtotal gastrectomy,8 underwent wedge gastrectomy + cholecystectomy,69 underwent wedge gastrectomy.The operation time and volume of intraoperative blood loss were (105 ± 33)minutes and (43 ± 16)mL in the laparoscopic surgery group,(121 ± 52)minutes and (199 ± 81) mL in the open group,respectively,with statistically significant differences between the 2 groups (t =-2.104,2.632,P ＜ 0.05).(2) Status of postoperative recovery:the time of gastrointestinal function recovery,time of drainage tube removal and duration of hospital stay were (4.6 ± 1.8) days,(5.8 ± 2.2) days,(7.1 ± 2.9) days in the laparoscopic surgery group and (5.2 ± 1.6) days,(7.1 ± 2.8) days,(8.7 ± 4.3) days in the open surgery group,respectively,with statistically significant differences between the 2 groups (t =-2.783,-3.891,-3.078,P ＜ 0.05).Wound infection,gastric emptying delay,anastomotic leakage,lung infection and bleeding were detected in 1,3,0,0,0 patients in the laparoscopic surgery group and in 0,2,2,2,1 patients in the open surgery group,respectively,with no statistically significant difference between the 2 groups (x2=0.421,P ＞ 0.05).(3) Follow-up status:Of the 192 patients,149 received follow-ups.Of 88 patients in the laparoscopic surgery group,68 were followed up for an average time of 39 months.Of 104 patients in the open surgery group,81 were followed up for an average time of 51 months.During the follow-up,tumor recurrence rate in the laparoscopic surgery group and open surgery group was respectively 8.8％ (6/68) and 21.0％ (17/81),with no statistically significant difference between the 2 groups (x2=1.888,P ＞0.05).Postoperative 1-,3-,5 year survival rates were 98.5％,92.9％,87.4％ and 91.7％,85.2％,76.9％ in the laparoscopic surgery group and open surgery group,respectively,with no statistically significant difference between the 2 groups (x2 =1.967,P ＞ 0.05).(4) Prognosis of patients in different risk level:of the 149 who received the follow-up,the tumor recurrence rate of patients in low,intermediate and high recurrence risk was 7.0％ (5/71),13.6％ (6/44) and 35.3％ (12/34),respectively,with a statistically significant difference among the above indexes (x2 =14.637,P ＜ 0.05),showing statistically significant differences between low risk and high risk patients and between intermediate risk and high risk patients (x2=13.263,6.279,P ＜ 0.05),while no statistically significant difference between low risk and intermediate risk patients (x2 =0.894,P ＞ 0.05).Five-year relapse-free survival rate of low,intermediate and high risk patients was 94.2％,80.0％ and 61.8％ respectively,with a statistically significant difference (x2=13.547,P ＜ 0.05),showing statistically significant differences between low risk and high risk patients,intermediate risk and high risk patients (x2 =4.357,12.336,P ＜ 0.05),while no statistically significant difference between low risk and intermediate risk patients (x2 =0.696,P ＞ 0.05).Conclusions Compared to open resection,laparoscopic GISTs resection offers better short-term outcomes,however,the two surgical techniques offer equal long-term outcomes.Patients of high risk have poor prognosis.

OBJECTIVE:To optimize base material compositions and preparation technology for compound ciprofloxacin gel.METHODS:4factors,ciprofloxacin,carbomer-940,glycerine,triethanolamine(in formula dosages)were selected as variable factors,the stability of the preparation was taken as the index for investigation and table L 9 (3 4 )was used to conduct the orthogonal experiment.RESULTS:The optimum base material composition and technology were the following,ciprofloxacin0.3%,carbomer-9401%,glycerine7.5%,triethanolamine2%.CONCLUSION:The compound ciprofloxacin gel prepared based on the optimized technology is in conformity with the specification stated in Chinese Pharmacopoeia(2000).

Objective To compare the effect of diversification rehabilitation team mode on function in patients with cerebral infarction. Methods Sixty-six patients with cerebral infarction were divided into diversification rehabilitation team mode group (diversification group) and routine rehabilitation mode (routine group) according to the rehabililation method with 33 cases each. All patients of 2 groups were treated for 2 weeks. Evaluations were made before and after treatment. The simplified Fugl-Meyer motor function rating scale was used to evaluate motor function, modified Barthel index was used to evaluate activities of daily living, and MOS 36-item short form health survey was used to evaluate quality of life;and 0-100 digital simulation assessment was used to evaluate patient satisfaction after treatment. Results The simplified Fugl-Meyer motor function rating scale score, modified Barthel index score, MOS 36-item short form health survey score and patient satisfaction rate after treatment in diversification group were significantly better than those in routine group: (76 ± 4) scores vs. (63 ± 3) scores, (65 ± 3) scores vs. (52 ± 4 ) scores, (57 ± 7) scores vs. (44 ± 6) scores, (92 ± 5) scores vs. (77 ± 3) scores, and there were statistical differences (P<0.05). Conclusions Both kinds of rehabilitation model can promote functional recovery in patients with cerebral infarction, but diversification rehabilitation team model is better than conventional model.

Objective: To propose a method for making organ-on-a-chip based on 3D printing, and study the relationship between cell growth on the chips and various factors. Methods: Through 3D printing technology and surface microstructure transfer method, ulcer-like and ridge-like mi-crostructures of the tumor surface and the intestinal villi were fabricated on a polydimethylsiloxane (PDMS) chip. Combined with fluorescence imaging, the effects of surface modification, shapes and heights of microstructures, and culture time on the surface coverage and density of Caco-2 cells on the chip were measured. Results:The PDMS chip was more likely to induce cell adhesion and growth rather than the 3D printing resin chip. On the surface of three-dimensional structure, cell surface coverage and cell density increased after the surface was treated with rat tail collagen (P<0.05). The height of surface structure of the chip affected the cell density (P=0.000). After surface modification, there was no significant difference in cell density at the same height of different steric structure (P>0.05). Conclusion: The intestinal villi and tumor topological organ chips can be fabricated by 3D printing technology and surface microstructure transfer method. The surface modification and microstructure height affect the cell growth on the surface.

Objective To compare the effects of short- term high- intensity interval training (HIT) and moderate continuous training (MCT) on inflammatory mediators for healthy young males. Methods 19 healthy young male volunteers were randomized into HIT group (n=6), MCT group (n=7) and no training control (CON, n=6) group. The groups of HIT and MCT accepted treadmill exercise once per 2 days to 6 times (2 weeks), and the CON group did not accepted treadmill exercise. The levels of high-sensitive C-reactive protein (hs-CRP), interleukin (IL) -1α, IL-6 and tumor necrosis factor α (TNF-α) were detected 3 days before exercise, immediately after the first exercise, 3 days after the course. Results There was no difference among groups in the level of hs-CRP, IL-1α, IL-6 and TNF-α in all the time (P>0.05). The concentration of IL-1α increased in the MCT group after the first exercise (P<0.01), and also the concentration of IL-6 in the CON group after the course (P<0.05). Conclusion It needs further srudy for the significance of HIT and MCT in the levels of inflammatory media.

Objective: To explore the risk factors of postoperative complications after radical gastrectomy + D2 lymphadenectomy and establish a predictive nomogram model. Methods: From July 2016 to June 2019, 1 705 patients who received radical gastrectomy + D2 lymphadenectomy in the Department of Gastrointestinal Surgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine were collected. According to Clavien-Dindo grading system, the postoperative complications were graded, and the risk factors of postoperative complications ≥grade Ⅱ were analyzed by χ2 test. Multivariate Logistic regression was used to analyze the independent risk factors of postoperative complications ≥grade Ⅱ. According to the selected independent risk factors, the nomogram model was established. For verification, above patients were used as the training set, and 612 patients undergoing the same operation in this department from July to December 2019 were used as the validation set. Results: A total of 416 (24.4%) gastric cancer patients had postoperative complications. Multivariate Logistic regression analysis showed that male (OR=1.507, P=0.002), age ≥60 years old (OR=1.962, P=0.001), maximum diameter of tumor ≥5 cm (OR=1.456, P=0.002) and total gastrectomy (OR=1.313, P=0.026) were independent risk factors for postoperative complications ≥ grade Ⅱ. Based on these independent risk factors, the nomogram was established and presented good discrimination and predictive consistency in training set and validation set. Conclusion: The nomogram based on these four independent risk factors has a good predictive performance in predicting postoperative complications after radical gastrectomy for gastric cancer, and has a certain clinical application and reference value.

Objective To assess and compare the difference in image quality and exposure dose between single-sided reading image plate(IP)and dual-sided reading IP.Methods A contrast-detail phantom CDRAD 2.0 was exposed by single-sided and dual-sided reading IP with different mAs sets.The entrance surface doses were recorded for all images.Images were then presented to two radiologists on a high resolution monitor of diagnosis workstation.The image quality figure(IQF)was measured for each image. Statistical analysis was performed using Spearman's correlation test and Wilcoxon signed-rank test to compare the difference in image quality and exposure dose between single-sided IP and dual-sided reading IP. Results With different tube current dosage of 5.6,12.0,20.0,25.0,and 40.0 mAs,IQF values of single-sided reading IP were 47.95,37.68,34.31,28.61,and 24.65,respectively,while those of dual- sided reading IP were 38.83,29.81,29.65,25.16,and 21.43,respectively.The IQF difference between them showed statistical significance(P

Aged ; Chondrosarcoma ; surgery ; Female ; Fracture Fixation, Internal ; methods ; Humans ; Sternum ; surgery ; Titanium