Objective To investigate the process of Stark cesarean section (CS) and analyze its key procedures and patients outcomes in order to understand its advantages and promote its standardization. Methods Elective Stark CS cases were divided into two groups according to time sequence and procedure difference. Group A refered to cases underwent modified approaches before standardization (n=362), and group B refered to cases afterward (n= 302). Duration of operation, time interval from incision to delivery, intraoperative hemorrhage, postoperative flatus time, postoperative morbidity, duration of retained urinary catheter, urinary tract irritation, wound infection, and abdominopelvie adhesion in the second operation were compared between the two groups. Results The average duration of the operations and time interval from incision to delivery in group B, which were (27.7± 10. 8) min and (4.92±1.21) min, respectively, were significantly shorter than those in group A, which were (35.6±15.2) min and (7.81±2. 79) min, respectively (P<0. 05). No significant differences was found with regard to average intraoperative hemorrhage between group A and B [(214.34±62. 1) ml vs (201.54-53.1) ml, P>0.05]. Postoperative flatus time in group B was significantly shorter than that in group A [(16.85±11.8) h vs (25.9±12. 7) h, P<0. 05]. Postoperative morbidity in group B was significantly lower than that in group A [1.3%(4/302) vs 4.7%(17/362), P<0.05]. The average duration of retained urinary catheter in group B was significantly shorter than that in group A [(15.6±5.3)h vs (26. 2±6.1)h, P<0. 05], and the urinary tract irritation rate in group B was also lower than that in group A [2. 5%(9/362) vs 0(0/302), P < 0. 05)], No incisional infection or delayed healing was found in either group. Rectus muscles, fascia and peritoneum adhesions were found in three cases with second surgery in group A and none in group B. No omentum, peritoneum and visceral peritoneum adhesion was found in either group. Conclusions Compared to the modified Stark operation, standardized procedure decreases operation associated complications and improves maternal outcomes. Therefore, standardized Stark CS should be promoted for better operative outcomes.

Objective Effect of psychological intervention on functional rehabilitation of femoral supracondylar fractures.Methods 84 type C fracture patients according to AO criteria for the diagnosis were collected,and randomly divided into intervention group(n=42)and control group(n=42)according to patient sex,age,fracture condition,cultural degree balanced matching principle.The control group was given conventional treatment and fracture features of health guidance,the intervention group in addition to conventional treatment and rehabilitation guidance.Comprehensive mental intervention applied 4 times on postoperative 3 days,the 2nd,3rd,4th week.Self-anxiety scale and self-depression scale were used before operation and 6th month after operation.Results The anxiety and depression scores in two groups before intervention showed no significant difference P>0.05).6 months after the operation,the anxiety score(41.6±9.4 vs 48.7±8.5)and depression score(40.6±7.6 vs 47.4±9.2)in intervention group apparently decreased than that in control group(P<0.01).Function restoration of knee joint in different effect showed better than control group(u=-2.0591,P<0.05).Conclusion Psychological intervention can effectively promote the functional recovery of patients with femoral supracondylar fractures and promote anxiety and depression mood.

Objectives To explore the change of interleukin-17 (IL-17) in Kawasaki disease (KD). Methods Fourty KD pediatric patients, among them 12 patients with echocardiographic abnormalities in acute phase, 25 age-matched non-KD patients were enrolled. The level of serum IL-17 was measured by enzyme linked immunosorbent assay in acute and convalescent phase of KD patients and non-KD patients. At the same time, C-reactive protein (CRP), globulin, albumin were detected. Results In acute phase of KD patients, the level of serum IL-17 were signiifcantly higher than that in convalescent phase of KD patients and non-KD patients (P<0.05). The level of serum IL-17 was no signiifcant differences in convalescent phase of KD patients and non-KD patients (P>0.05). In acute phase of KD patients with echocardiography abnormalities, the level of serum IL-17 was signiifcantly higher than that with non-echocardiography abnormalities (P<0.05). The level of serum IL-17 in acute phase of KD patients were positively correlated with CRP and globulin (r=0.750, 0.750, P<0.05), and negatively correlated with albumin (r=-0.779, P<0.05). Conclusions IL-17 may be involved in KD immune pathogenesis. Serum IL-17 is one of the activity index of KD, which associ-ated with cardiovascular damages.

BACKGROUND: Mesenchymal stem cells (MSCs) are capable of differentiating into a variety of lineages, including bone, cartilage, or fat, depending on the inducing stimuli, specific growth and differentiation factors.Recombinant human bone morphogenetic protein 2 (rhBMP-2) produced by gene engineering has an obvious osteoinductive activity and can induce undifferentiated mesenchymal cells into cartilage and bone irreversibly, resulting in new bone formation. Basic fibroblast growth factor (bFGF) modulates chondrogenic and osteogenic differentiation of MSCs.OBJECTIVE: To investigate the effect of bFGF and rhBMP-2 on the differentiation and proliferation of cultured rabbit mesenchymal stem cell in order to find out an optimal way of osteogenesis instead of conventional osteogenic supplements (OS).DESIGN: A randomized and controlled trial.SETTING: General Institute of Orthopaedic Oncology, Tangdu Hospital,Fourth Military Medical University of Chinese PLA.MATERIALS: The subjects were rabbit mesenchymal stem cells cultured by the author.METHODS: This experiment was conducted at the Center of Orthopaedic Surgery, General Institute of Orthopaedic Oncology, Tangdu Hospital,Fourth Military Medical University of Chinese PLA from June 2004 to December 2004. ①Rabbit MSCs cultured in vitro were treated with different growth factor (100 μg/L rhBMP-2, 100 μg/L bFGF, 10 μg/L rhBMP-2and 100 μg/L bFGF and OS; ②The proliferation and differentiation of MSCs were observed through activity of MTT, expression of alkaline phosphatase(ALP), and von Kossa staining.MAIN OUTCOME MEASURES: the rate of proliferation and the activity of ALP.RESULTS: ①rhBMP-2 could promote the proliferation and differentiation of MSCs, especially the cell differentiation; ②bFGF could stimulate the proliferation , the cellular proliferation rate increased 100% as compared with control group, and has no effect on differentiation of MSCs , but it could enhance effect on the cell proliferation of rhBMP-2.CONCLUSION: bFGF and rhBMP-2 are effective induction factors for MSCs. Both of them can stimulate the proliferation and differentiation of MSCs in vitro. bFGF and rhBMP-2 exerted a synergetic action in speeding up the pace of osteoinduction and osteogenesis and can be used to differentiate seed cells for tissue engineering bone.

Objective To observe the changing levels of serum sFas before and after intravenous i mmunoglobulin (IVIG) treatment of incomplete Kawasaki disease (IKD),to explore the roles of sFas in the pathogenesis of IKD and IVIG treatment mechanism.Methods Thirty eight cases of IKD children were selected as experimental group and 20 examples of the same age of children as the control group.The IKD children were treated by IVIG in combination with aspirin (ASP) ; and blood test was performed before treatment,3 days after treatment,and 14 days after treatment,respectively.Dual-resistant sandwich enzyme-linked immunosorbent assay (ELISA) was used to detect the levels of serum sFas,plasma Fibrinogen (PT-D),d-dimer (D-D),and c-reactive protein (CRP).Results The levels of serum sFas,PT-D,D-D,and CRP were significantly higher than the control group for IKD children before treatment[(0.55 ± 0.14)ng/L vs (0.24 ±0.04) ng/L,(552.3 ± 147.2) mg/dl vs (277.3 ±82.5)mg/dl,(649.0 ±201.6) μg/L vs (315.4 ±91.8)μg/L,and(72.2 ±28.7)mg/L vs (7.2 ±2.9)mg/L; t' =12.41,9.11,8.64,13.82;All P ＜ 0.05] ;3 days after treatment,compared with those before treatment and control group,the sFas level of IKD children at the third day after treatment was significantly decreased compared to that before treatment and control groups,respectively [(0.43 ± 0.09) ng/L vs (0.55 ± 0.14) ng/L,(0.24 ± 0.04) ng/L,F =47.624,All P ＜0.05] ;For the level of sFas at the 14th day after treatment,no statistical significance was found between IKD children and the control group[(0.24 ±0.05) ng/L vs (0.24 ±0.04) ng/L,t =0.596,P ＞ 0.05].Conclusions The abnormally increased serum sFas level before IVIG treatment suggests that dysfunction of apoptosis be involved in the pathogenesis of the IKD.Intravenous immunoglobulin treatment may be involved in the apoptosis process.

Objective To investigate the clinical application of wave intensity (WI) technique in assessing the short-term effects of cardiac resynchronization therapy(CRT). Methods Sixteen patients with congestive heart failure treated with CRT were chosen. Before the implantation of CRT pacemaker and 1 week, 1 month,3 month after it,the diameters and volumes of left ventricle(LV) in the end-diastole and the end-systole were measured by echocardiography. LV ejection fractions(LVEF) were calculated by Simpson's way,and the variation ratio of left ventricular end-systolic volume(△ESV) was assessed each time after the CRT. The maximal rate of LV pressure rise (LVdP/dtmax) was assessed in the continuous-wave Doppler spectrum of mitral regurgitation. The magnitude of W1, and the length of R-W1 interval as well as W1-W2interval were recorded by WI technique applied on the left carotid artery of each patient. Results Compared to the data before CRT,W1 and W1-W2 interval were significantly higher in different period after CRT (P ＜0. 01). This result was conformed with echocardiographic remodeling data and LV systolic function.Conclusions WI provides a potential usage in conveniently and effectively assessing the CRT effects in short-term.

Objective To study the expression levels of N-terminal pro-brain natriuretic peptide (NT-proBNP),serum albumin of Kawasaki' s disease (KD),incomplete Kawasaki' s disease (IKD),and children whose fever were unexplained and to explore the clinical significance of the levels of NT-proBNP and serum albumin in the early diagnosis of IKD.Methods The levels of NT-proBNP of 246 cases of KD (KD group),61 cases of IKD (IKD group) and 301 cases of children with unexplained fever (fever group)were measured by the enzyme-linked fluorescence analysis (ELFA) at the day of admission,meanwhile,the levels of albumin were tested in KD,and IKD children were underwent ECG and echocardiography.Based on the test results,patients were further divided into the group with cardiovascular damage and the group without cardiovascular damage.SPSS 19.0 was used for statistical analysis.The t test was used to compare the parameters between each group,the variance analysis and association analysis were carried out with Pearson's correlation analysis.The ROC curve analysis was done to identify the cardiovascular damage threshold.Results ① The level of plasma NT-proBNP of the KD group,the IKD group was significantly h igher than the fever group [(789.1±4.7) ng/L,(824.8±4.4) ng/L vs (92.5±2.3) ng/L,F=230.736,all P＜0.05];② The level of albumin of the KD group and the IKD group was significantly lower than that of the fever group [(33.9±2.8) g/L,(33.8±3.1) g/L vs (40.8±3.6) g/L,F=355.648,all P＜0.05]; ③ The levels of NT-proBNPs between the cardiovascular damage group and the groups without cardiovascular damage among the KD group,and those of the IKD groups were compared.In the KD group,the NT-proBNPs level of the two subgroups was (2948±3) g/L (n=103) vs (305±3) g/L,n=143; while in the IKD group,the NT-proBNPs of the two subgroups was (1454±4) g/L (n=38) vs (323±4) g/L (n=23).The dif-ferences were statistically significant (t=16.464,4.356,all P＜0.05).④ The plasma NT-proBNP level higher than 933.5 ng/L was identify as the indicator for cardiovascular damage in both KD and IKD children.Its sensi-tivity was 88.1％,and its specificity was 89％.⑤ When the level of NT-proBNP was higher than 250 ng/L,the sensitivity for diagnosis in the KD,the IKD was 80.9％,85.2％ respec-tively,and the specificity was 85.7％.When the level of NT-proBNP was higher than 250 ng/L and that of albumin was lower than 35 g/L,the sensitivity for diagnosis of KD,IKD was 67.5％,70.5％ respectively,the specificity was 99.7％.Conclusion The level of plasma NT-proBNP (＞250 ng/L) accompanied by decreased albumin (＜35 g/L) may be specific markers for early diagnosis of IKD.In addition,the level of NT-proBNP ≥933.5 ng/L can be used as a diagnostic threshold,which has good sensitivity and specificity for identifica-tion of cardiovascular damage in the KD and IKD in children.

Spectrophotometric seawater pH measurement system is an urgent need of device due to its quick speed and high precision. Based on spectrophotometric method and flow injection analysis technique, an automated system for pH measurement of seawater was developed by integrating pump and valve flow path, LED light source, flow cell and spectrophotometer. This measurement system effectively avoided bubbles. The indicator of concentration gradient in the seawater sample was used to correct for the pH perturbation caused by the indicator, thus the operation of system was simple and convenient. with this system, only 1. 5 min was needed for a sample measurement with a precision of 0. 0013 pH units and an offset of 0. 0059 pH units. This system could be used for the rapid determination of pH of seawater collected by laboratory or research ship with high precision pH values.

Objective To assess the myocardial function with early insulin treatment by velocity vector imaging (VVI) combined with dipyridamole stress in diabetic rats.Methods The 30 rats comprised 20 diabetic rats and 10 normal rats in the study.The 20 diabetic rats were divided into the diabetes mellitus(DM) group and the treatment group.Every rat in the treatment group was hypodermic injected with protamime biosynthetic human insulin after the diabetic model established.The control group was including 10 normal rats of the same age.After 8 weeks,each rat was performed with VVI at baseline and after dipyridamole stress.Results At baseline VVI,the parameters in the DM and the treatment groups were reduced compared with those in the control group.The systolic velocity,circumferential strain,systolic and diastolic circumferential strain rate in the treatment group were increased significantly compared with those in the DM group.After stress,the VVI reserve parameters in the treatment group were higher than those in the DM group.Conclusions The myocardial function are improved with early insulin treatment in the diabetic rats.

Objective:To explore the effect of SBAR (situation, background, assessment, recommendation) communication model combined with scenario simulation in clinical teaching of blood purification center.Methods:Sixty interns in the blood purification center from March 2019 to March 2020 were collected in the study, and randomly divided into experimental group ( n=30) and control group ( n=30). The two groups of students studied in two different treatment groups in the blood purification center. The control group used the method of traditional teaching, while the experimental group used SBAR communication combined with situational simulation for teaching on the basis of traditional teaching, with a total clinical practice time of two months. All trainees underwent theoretical examination, clinical operation examination, self-efficacy evaluation and teaching satisfaction survey after training. SPSS 22.0 was performed for t test. Results:Through SBAR communication model combined with situational simulation teaching, the scores of theoretical examination [(88.13±3.22) vs. (85.51±3.17)], clinical operation assessment [(91.31±3.48) vs. (84.17±4.94)], self-efficacy evaluation [(11.13±1.08) vs. (9.21±1.89)], teaching satisfaction [(95.71±2.87) vs. (91.18±3.08)], and communication ability [(12.27±1.13) vs. (8.63±1.45)] in the experimental group were higher than those in the control group; while there was no significant difference in the scores of theoretical assessment between the two groups ( P<0.05). Conclusion:SBAR communication model combined with situational simulation teaching can improve the learning ability, operation ability and comprehensive application ability of special training trainees, especially in communication ability, which is worthy of popularization and application in clinical teaching.