Objective:To study the eExecutive fFunctions Characteristics of Cchildren with Aattention dDeficit hHyperactivity Ddisorder in Cclock Ddrawing Ttest. Methods: 60 ADHD children and 60 normal children awere tested by CDT. Then analyze the data to detect the difference of Executive Functions of two growps. Results:ADHD group geot significant lower scores than control group on both time total score (data) and clock face structure score. (3.23?1.40/4.15?0.78,11.2?1.48/11.90?0.76,t=7.742、5.073,P0.05). Conclusions: the lower score in CDT showed that ADHD child have some weaknesses in planning , in attention regulating and in working memory. The core of these weaknesses is failing of execute function.

Objective To identify the necessity to carry out optimization procedure in routine digital radiography (DR) by evaluating changes of patient radiation dose and image waste ratio before and after optimization.Methods Two hundred patients with near-standard body build were enrolled in the study.Half of them undertook routine examination,and the others undertook the examination with bestlyoptimized protocol.The dose-area product (DAP) and entrance surface dose (ESD) were recorded.The image waste ratios in 2 groups were calculated and the reasons for image waste were analyzed.The radiation dose and image waste ratio before and after optimization were compared.Results The ESD,DAP and image waste ratio in bestly-optimized radiography were significantly lower than those in non-optimized radiography (z =9.31,16.22,P＜0.05; x2 =36.5,P ＜ 0.05).Conclusion Using the bestlyoptimized digital radiography,the patient radiation dose and image waste ratio are effectively reduced.

Objective: To investigate the relation between ser um hyaluronic acid (HA) concentration and cryopreservation-reperfusion injury. Methods: The animals were randomly assigned to 3 groups: (1 ) group A: the control; (2) group B: liver allografts were stored in lactated R inger's solution (0℃) for 2 h before implantation; (3) group C:liver allografts were stored in lactated Ringer's solution (0℃) for 4 h before implantation. Th e serum sample and liver specimen were taken up at 2 h and 4 h after transplanta tion to detect the concentration of HA, AST and LDH, and to get pathologic obser vation. Results: Serum HA increased earlier and decreased more s hortly than AST and LDH after transplantation in group A. Serum HA increased sig nificantly in group B and C, much higher than that in group A(P<0.01). The i njury of vascular endothelium and the disorder of hepatic sinuses and hepatic lo b ules were observed in group B and C. In the specimen of 4 h in group C, evident infiltration of inflammatory cell was present. Conclusion: Cryopreservation leads to injury of endothelial cell and reperfusion aggravat es this injury. The serum HA concentration indicates the degree of cold ischemia -reperfusion injury.

Objective To study the role of KRX-725,a specific agonist of Sphingosin-1 phosphate receptor 3,S1PR3),in the function and mechanism of S1PR3 in respect of bacterial clearance.Methods Twenty healthy male C57BL/6 mice were randomly (random number) divided into two groups:KRX-725 group and control group.Septic mice model were established by intraperitoneal injection of E.coli (3 × 106),then KRX-725 (10 mg/kg) or the vehicle was administered intratracheally.Forty-eight-hour survival rate (n =12),bacterial colony numbers in peritoneal cavity and blood (n =5),and lung injury (n =3)were compared between two groups.In vitro,the peritoneal macrophages were stimulated by E.coli (cell∶E.coli=1∶10) with KRX-725 or the vehicle treatment.The reactive oxygen species (ROS) levels were detected by CM-H2DCFDA in macrophages.The bacteria clearance function of KRX-725 was observed by gentamicin protection test.Survival rates were analyzed with the Log-rank test.A 2-tailed student's t test was used to compare difference between two independent groups.Results Compared with the control group,the 48-hour survival rate of KRX-725 group was significantly higher (P ＜ 0.05).Bacterialload in the blood and the peritoneal lavage fluid (PLF) was greatly decreased in the KRX-725 group (blood:t =3.17,P ＜0.05;PLF:t =4.07,P ＜0.01).The lung tissues injury was also obviously reduced in the KRX-725 group of 24 hours after the injection of E.coli (lung injury score:KRX-725 group 1.4 ± 0.25;control group 2.4 ± 0.25) (t =2.89,P ＜ 0.05).In vitro,KRX-725 could up-regulate the ROS levels in macrophage at 20 min and 30 min after E.coli injected intra-peritoneally (20 min fluorescent intensity:KRX-725 group 522.9 ± 38.76,control group 385.9 ± 15.90,P ＜ 0.05;30 min fluorescent intensity:KRX-725 group 519.7 ±25.02,control group 384.5 ± 15.28,P ＜0.01).The bacterial load in the KRX-725 treated macrophage were significantly decreased at 3 h and 6 h after E.coli injected intra-peritoneally (3 h:KRX-725 group 286.5 ±98.35,control group 710.8 ± 107.8,P ＜0.05;6 h:KRX-725 group 72.5 ±6.45,control group 205.8 ±66.76,P ＜0.01).Conclusion In vivo,KRX-725 could improve the survival rate of septic mice,decrease the bacterial lioad in the blood and PLF,and reduce the lung injury.In vitro,KRX-725 could up-regulate the ROS level in macrophages and accelerate the bacterial clearance.

Objective To explore the specific brain regions involved in Chinese character radicals visualspatial processing,as well as to explore the relationship between visual-spatial identification and Chinese characters radicals identification.To provide an evidence for understanding the underlying neural mechanism of developmental dyslexic.Methods Twelve healthy Chinese fourth and fifth grade children(7 boys and 2 girls,aged from 10 to 11 years old)were chosen from a primary school in Guangzhou.The children were native Chinese speakers and right handed.The subjects participated in two fMRI experiments on a 3.0 T Siemens MR scanner.Two separate block-designed cognitive tasks were devised,one was figure directions judgement task and the other was Chinese characters radical identification task.A single-shot GE-EPI scan sequence were used for fMRI scans.The BOLD fMRI data were collected and were preprocessed and analyzed in SPM2.Results The subjects had longer reaction time during the two experiments tasks than in control states((879±127)ms vs(805±124)ms,P=0.029;(917±144)ms vs(750±101)ms,P＜0.01),and had same response accuracy in both tasks and control states((96±5)% vs(95±8)%,P=0.515;(89±10)% vs(96±6)%,P=0.130).In figure direction judgement experiment,activations were found in bilateral occipital,right superior parietal,right precuneus and right middle frontal cortices.However,different and more extensive regions including left superior parietal,left precuneus,left hippocampus,right thalamus,right caudate cortices and bilateral occipital cortices were involved in identifying the radicals of Chinese characters.Conclusion Right hemisphere was dominant in judging the figure direction,and left hemisphere is dominant in identifying radicals of Chinese characters.These fMRI results show light on underlying partial similar neurophysiological mechanism between judging figure directions and identifying Chinese character radicals.The visual-spatial ability may be essential for Chinese character radical identification.

Objective To get the maximum information from computed radiography (CR) output images by changing post-processing parameters. Methods Six experimental photos of polypropylene balls of 2.0 mm in diameter were taken by means of one time X-ray exposing on an imaging plate (IP) with different post-processing parameters including rotation amount (GA), gray gradation type (GT), rotation center (GC), shifting amount (GS), frequency rank (RN), frequency type (RT), and degree of enhancement (RE). 6 photos were viewed by three students and one radiologist on a 6 000 lx illuminance viewbox. Receiver operating characteristic (ROC) curves were made by means of 5-value-differentiation method. Results The largest mean area value (Az) below ROC curves of a low contrast experimental photo with post-processing parameters GA=1.0,GT=A, GC=1.6, GS=0.3, RN=4.0, RT=R and RE=3.0 was 0.96, and the maximum information was obtained. The smallest mean area value (Az) was 0.78 with changed post-processing parameters GA=0.8, GS=-0.2 and RE=0.5 while other parameters were not changed. The minimum information was obtained from this photo. Conclusion In order to get the maximum information from a CR output image, the post-processing parameters should be suitably selected.

Objective:To explore the changes of disease burden and risk factors of chronic kidney disease (CKD) due to type 1 and type 2 diabetes mellitus in China from 1990 to 2019, and to provide reference data for the prevention and control of diabetic kidney disease (DKD).Methods:The Chinese DKD data were obtained from the 2019 Global Burden of Disease (GBD) database. The morbidity, prevalence, mortality, years lived with disability (YLD), years of life lost (YLL), and disability-adjusted life year (DALY) were used to compare the disease burden of CKD due to type 1 and type 2 diabetes mellitus from 1990 to 2019. In addition, the risk factors of DKD were analyzed.Results:The numbers of CKD patients due to type 1 and type 2 diabetes mellitus in China were 574 (95% UI 495-665) and 31 076 (95% UI 28 152-33 909) thousand, and the numbers of new cases were 9 (95% UI 8-11) and 434 (95% UI 390-481) thousand in 2019, respectively. The numbers of death were 13 (95% UI 8-18) and 63 (95% UI 50-77) thousand, respectively. The age groups with the largest number of patients and new cases of CKD due to type 1 diabetes mellitus were 30-34 years old and <5 years old, respectively. The age group with the largest number of patients and new cases of CKD due to type 2 diabetes mellitus were 50-54 years old and 70-74 years old, respectively. From 1990 to 2019, the age-standardized prevalence rate of DKD patients in China was relatively stable, but the age-standardized incidence rate and YLD rate showed an upward trend, while the age-standardized mortality rate, YLL rate, and DALY rate showed a downward trend. The main risk factors associated with DKD death were high fasting plasma glucose, kidney dysfunction, high systolic blood pressure, high body mass index, high sodium diet, and lead exposure. The proportions of DKD death caused by high systolic blood pressure and high body mass index in the Chinese population were still increasing. Conclusions:From 1990 to 2019, the age-standardized incidence and YLD rate of DKD in China shows an upward trend, while the age-standardized prevalence rate is relatively stable, and the age-standardized mortality rate, YLL rate, and DALY rate show a decreasing trend. High fasting glucose, renal failure, high systolic blood pressure, high body mass index, high sodium diet, and lead exposure are risk factors associated with death in DKD patients. With the progress of aging, the disease burden of DKD in China will continuously increase. Future work should be focused on population-specific interventions, taking into consideration the risk factors identified within the study.

Objective: To investigate the prevalence of sleep problems and influencing factors among preschoolers, so as to provide a reference for healthy sleep behaviors among preschoolers. Methods: From December 2017 to June 2018, a questionnaires study was administered to parents of 8 456 preschoolers from kindergartens in Yangzhou, Zhenjiang and Xuzhou by using random cluster sampling method. Demographic characteristics, screen time, sleep patterns and the Children s Sleep Habits Questionnaire (CSHQ) were colleted. Results: The average night sleep duration was (9.91±0.64)h, the rate of sleep deprivation was 51.7%, which increased with age ( χ 2 trend =34.19, P <0.01). The total scores of CSHQ were (49.46±5.02), and the prevalence of sleep problems was 95.0%, with the prevalence of specific sleep problems ranged from 2.3% to 76.4%. Multivariate Logistic regression analysis showed that only child, mothers age, parental education, and household economic status was significantly associated the sleep problems ( P <0.05). Conclusion The prevalence of sleep problems among preschool children is more prominent, varies by only child, parental education and household economic status. Parents and society should raise awareness of sleep problems.

Objective: To explore the correlation between screen time, exposure time to different screens and psychology behaviors of preschool children. Methods: A total of 2 582 children from kindergartens in urban Xuzhou areas were recruited to perform the physical examination, a cluster sampling method being explored. Parent questionnaires were performed to understand the time of screens and children’s psychology behaviors. Multi-linear regression and Logistic regression models were also used to analyze the correlation between them in preschool children. Results: The prevalence of abnormal internalization behavior of preschool children in Xuzhou City was 3.8%, the detection rate of abnormal externalization behavior was 22.4%, and the detection rate of prosocial behavior abnormality was 20.9%. The time spent by the preschool boys on TV time, learning day screen time and one-week video time is significantly higher than the girls (P<0.05). After adjusting for age and gender, the results of multiple linear regression analysis showed that the longer the average screen time, the more serious the problem of internalizing and externalizing problems; and the longer the average screen time of the weekend and the week, the worse the prosocial behavior of children (P<0.05). After correcting multiple covariates, it was found that the average screen time was positively correlated with children’s internal and external behavioral problems (P<0.05). Logistic regression analysis showed that after adjusting for age and gender, the average screen time of study day, weekend and week was a risk factor for preschool children’s internal and external behavior problems, and the average weekly screen time was a protective factor for prosocial behavior (P<0.05). After adjusting for multiple covariates, the learning day and the average weekly screen time were risk factors for children’s internal and external behavior (P<0.05). In addition, the results of association analysis between different types of video time exposure and psychological behavior showed that after adjusting for age and gender, all types of video exposures affected the internal and external behaviors of patients (P<0.05); after correcting multiple covariates The association was still statistically significant (P<0.05). Logistic regression analysis showed that after adjusting for age and gender, the exposure time of each type of video screen was a risk factor for children’s internal and external behavior problems (P<0.05). After correcting multiple covariates, all types of video exposure were internalized behavior problems. The risk factors, and the video time of other electronic products were risk factors for externalization behavior problems (P<0.05). Conclusion Average screen time has a significant positive correlation with psychological behavior, and the exposure time of screens such as TV and mobile phone could increase the incidence of psychological behaviors in preschool children.

Objective To summarize the etiology,diagnosis and treatment of three cases of duodenal perforation. Methods The data of 3 cases of children with duodenal perforation in our hospital from September 14,2016 to June 20,2017 were retrospectively analyzed. The causes,clinical features and treatment of children's duodenal perforation were summarized. Results A total of 2 males and 1 females aged 2 years,3 years and 5 years were included in the 3 cases. All 3 cases had fever history of upper respiratory tract infection before onset. Acute abdominal pain occurred after oral administration of ibuprofen several times,and all the abdominal plain films prompted pneumoperitoneum. Three cases of perforation sites were duodenal anterior wall,diameter were 0. 5-1 cm. Two cases of small amount of pneumoperitoneum were explored and repaired the duodenal perforation by 3D laparoscopic,1 case underwent laparotomy to repair the duodenal perforation due to a large number of liquid pneumoperitoneum and severe shock. Repair of 3 cases were covered with omentum. Three cases were all cured without anastomotic fistula, ulcer, adhesive intestinal obstruction or other complications. Followed-up in the department of gastroenterology,3 cases had no Helico-bacter pylori infection. Conclusion Repeatedly oral administration of ibuprofen can cause duodenal perfora-tion in children in the short term. Once the digestive tract perforation confirmed,emergency surgical explora-tion is needed. Laparoscopic repair of duodenum perforation is safe and effective and may have a faster recov-ery. We can choose exploratory laparotomy if conditions are not allowed.