This paper proposes a falling detection system based on MPU6050 senor. The system consists of a MPU6050 sensor, a STM32 MCU and a set of Bluetooth 4.0 device: collecting and parsing the falling data, transferring the result to a smartphone, the smartphone: receiving the result, alarming the elder's family and hospital. This paper presentes a new judging algorithm based on the threshold of three-axis acceleration and angle deviation of body, in order to differentiate AF and normal daily activity. The result proves that the accuracy of the system is higher than 95%, which strongly highlight the robustness and reliability.
Acceleration ; Accidental Falls ; Activities of Daily Living ; Aged ; Algorithms ; Humans ; Reproducibility of Results ; Smartphone ; Software

OBJECTIVETo investigate the therapeutic effect of alar rotation flap for severe alar retraction.

METHODSPatients with severely retracted alar underwent ala reconstruction using alar rotation flaps and autogenous cartilage batten grafts. First, costal cartilage was used to reshape the nasal tip and nasal dorsum. Then cartilage patch was used to extend and thicken the retracted alar. Then the alar rotation flap was transferred to correct retracted alar.

RESULTSFourteen patients with severe alar retraction underwent alar reconstruction with alar rotation flap and alar batten grafts. The alar retraction was corrected in all cases, with improvements functionally and aesthetically. No recurrence of alar retraction was noted. The incision healed with acceptable cosmetic results, with obvious scar in only one patient (one side).

CONCLUSIONSThe alar rotation flap is an effective and reliable surgical option to correct severe alar retraction. Scar can be kept inconspicuous by precise placement of the incision within the junction of the ala and the nasal dorsum, following principles of the aesthetic nasal subunits.

Cartilage ; transplantation ; Cicatrix ; prevention & control ; Costal Cartilage ; transplantation ; Esthetics ; Humans ; Nose Deformities, Acquired ; surgery ; Rhinoplasty ; methods ; Rotation ; Surgical Flaps

Objective:To study the inhibitory effect of salidroside on the proliferation of fibroblast-like synoviocytes with rheumatoid arthritis in human(HFLS-RA) induced by tomor necrossi factor-α(TNF-α),and to clarify the molecular mechanism of its control effect on rheumatoid arthritis(RA).Methods:The HFLS-RA were cultured in vitro,then treated with TNF-α and different concentrations of salidroside.The cells were divided into normal control group(0 μg·L-1TNF-α),model control group(10.0 μg·L-1TNF-α)and 12.5,25.0,50.0,and 100.0 μmol·L-1 salidroside groups(10.0 μg·L-1TNF-α+salidroside).The proliferation activity was detected by MTT mehthod;the expression levels of β-catenin,matrix metalloproteinase-7(MMP-7),and Cyclin-D1 in supernatant of the cells were detected by ELISA method;the expression level of β-catenin protein in cells was detected by Western blotting method.Results:Compared with normal control group,the proliferation activity of the HFLS-RA in model control group was significantly increased (P<0.05);compared with model control group,the proliferation activities of the HFLS-RA in 12.5 and 25.0 μmol·L-1 salidroside groups were decreased but there were no significant differences(P>0.05),and the proliferation activities of the HFLS-RA in 50.0 and 100.0 μmol·L-1 salidroside groups were significantly decreased (P<0.05).Compared with normal control group,the expression levels of β-catenin,MMP-7,and Cyclin-D1 in the supernatant of the cells in model control group were increased(P<0.05).Compared with model control group,the expression levels of β-catenin,MMP-7,and Cyclin-D1 in the supernatant of the cells in 12.5 and 25.0 μmol·L-1 salidroside groups were decreased,but there were no significant differences(P>0.05);the expression levels of β-catenin,MMP-7,and Cyclin-D1 in the supernatant of the cells in 50.0 and 100.0 μmol·L-1 salidroside groups were decreased(P<0.05).The Western blotting results showed that the expression level of β-catenin protein in the cell in model control group was higher than that in normal control group(P<0.01);the expression levels of β-catenin protein in the cells in 12.5 and 25.0 μmol·L-1 salidroside groups were lower than that in model control group,but there were no significant differences(P>0.05);the expression levels of β-catenin protein in the cells in 50.0 and 100.0 μmol·L-1 salidroside groups were lower than that in model control group(P<0.05).Conclusion:Salidroside could inhibit the proliferation of HFLS-RA,and its control effect might be related to the regulation of Wnt/β-catenin single pathway.

Objective To establish model of the chicken embryo transplantation of human colon cancer cells ,and investigate the effect of Solanine、VEGF antibody and Solanine combined with VEGF antibody on human colon cancer cells induce tumor angio‐genesis and tumor proliferation .Methods The model of the chicken embryo transplantation of human colon cancer HT‐29 cells were divided into three experimental group and control group .We added to the chick embryo chorioallantoic membrane with Sola‐nine、VEGF antibody and Solanine+ VEGF antibody mixture ,PBS was added to the control group .Then we analysed picture through the stereomicroscope and IPP 6 .0 image analysis software ,using immunohistochemistry envision method to detect of CD34 antigen and ki‐67 antigen ,and observing effect of Solanine group ,VEGF antibody group ,Solanine+ VEGF antibody group and the effect on the tumor angiogenesis and tumor proliferation .Results The tumor angiogenesis ,CD34 antigen and ki‐67 antigen of Sola‐nine+VEGF antibody group were significantly better than those of VEGF antibody group and Solanine group(P<0 .01);VEGF antibody group had statistical significant difference with Solanine group(P<0 .01);the effect of other three groups were better than that of the control group(P<0 .01) .Conclusion Solanine、VEGF antibody and Solanine combined with VEGF antibody could in‐hibit tumor angiogenesis and tumor proliferation of human colon cancer cell line HT‐29 to induce .It provides a new way for anti‐an‐giogenes .

Objective To investigate the expression level and clinical significance of long non-coding RNA(LncRNA) growth arrest specific gene-antisense 1(GAS8-AS1) in papillary thyroid microcarcinoma(PTMC) patients. Methods We investigated the expression profile of GAS8-AS1 in tissue samples of patients with PTMC as well as nodular goiter(NG) by quantitative real-time polymerase chain reaction(RT-qPCR). Results GAS8-AS1 in cancer tissue was down-regulated in PTMC patients compared with adjacent thyroid tissue and NG samples(P<0.05). Lower level of GAS8-AS1 was also correlated with central cervical lymph node metastasis(CLNM, P<0.05). The area under the ROC curve for GAS8-AS1 was up to 0.717 3 in CLNM prediction(P<0.05). Conclusion GAS8-AS1 may act as a potential biomarker for PTC diagnosis and CLNM prediction.

Objective To establish a risk rating scale for central lymph node metastasis in papillary thyroid carcinoma and make risk stratification.Methods Data of 502 patients with PTC who were treated in Beijing Shijitan Hospital between January 2010 and June 2015 were retrospectively analyzed.The independent predictors for CLNM were found.Then a risk rating scale was established and stratification risk was made.The diagnostic value of the risk rating scale in predicting CLNM was evaluated.Data of 100 patients with PTC who were treated in Beijing Shijitan Hospital between July 2016 and June 2016 were used to validate the risk rating scale.Results A cutoff value of 5 points was found to be the best prediction for CLNM,with the sensitivity and specificity were 73.8％ and 70.2 ％.We definite score ≤ 4.5 as low risk for CLNM,as well as score from 5 to 7 as middle risk,score ≥ 7.5 as high risk.The other data of 100 patients was used to validate the risk rating scale.The sensitivity and specificity were 79.5％ and 78.7 ％ respectively.The positive predictive value and the negative predictive value were 70.5％ and 85.7％ respectively.Conclusions The risk rating scale provide a convenient,intuitive and quantized method to predict CLNM,which is helpful to select suitable surgical strategy and reduce operative complications.

Objective:To evaluate the effect of selective inhibitor of caspase-1 VX-765 on cognitive function in a rat model of hemorrhage shock and resuscitation (HSR).Methods:Forty-eight clean-grade healthy male Sprague-Dawley rats, aged 9-10 weeks, weighing 350-400 g, were divided into 4 groups ( n=12 each) using a random number table method: sham operation group (S group), HSR group (H group), VX-765 group (V group), and solvent control group (C group). The rats in H, V and C groups were subjected to hemorrhage by bleeding from femoral vein to achieve mean arterial pressure of 25-35 mmHg which was maintained at this level for 60 min followed by resuscitation with shed blood within 15 min to restore blood pressure, and normal saline was infused when needed.VX-765 1 mg/kg and 0.4% polyethylene glycol 1 mg/kg were intravenously injected via the femoral vein immediately after the end of resuscitation in V and C groups, respectively.Six rats in each group were selected and sacrificed at 12 h after the end of resuscitation, and the cerebral cortex was removed for determination of neuronal pyroptosis (by immunofluorescence) and degree of cortical edema (using T2-weighted imaging). Cognitive function was measured by open field test on day 7 after resuscitation in the rest 6 rats in each group. Results:Compared with S group, the pyroptosis rate in cortical neurons at 12 h after resuscitation and degree of cortical edema were significantly increased, the distance in the central square and the number of standing on the back legs were decreased on day 7 after resuscitation, and the time spent in the central square was shortened in H, V and C groups ( P<0.05). Compared with H and C groups, the pyroptosis rate in cortical neurons at 12 h after resuscitation and degree of cortical edema were significantly decreased, the distance in the central square and the number of standing on the back legs were increased on day 7 after resuscitation, and the time spent in the central square was prolonged in V group ( P<0.05). Conclusion:VX-765 can improve the cognitive function, and the mechanism may be associated with inhibiting pyroptosis in cortical neurons in a rat model of HSR.

To develop a simple and easy promotion risk score to identify individuals with undiagnosed papillary thyroid carcinoma (PTC), and further to compare the diagnostic efficiency of PTC risk sore with fine needle aspiration cytodiagnosis (FNAC). in order to optimize the screening process of PTC. A sample of 1003 individuals aged 11-82 years underwent a surgical treatment of thyroid nodule participated in the study. The risk score was developed by stepwise backward multiple logistic regression. And using the receiver operating characteristic (ROC) curve to evaluate the diagnostic efficacy, the best diagnostic cut-off point and the risk stratification of malignant. Compare the sensitivity, specificity, accuracy, and area under curve ( AUC) of PTC risk score, FNAC and their combined diagnosis to judge their diagnostic efficiency. The risk score included age, TSH, nodule morphology and boundary by palpation, nodule characteristics, shape, boundary, calcification and blood flow signal by ultrasound. Its AUC= 0. 815, 6 point was the best cutoff point to differentiate benign from malignant thyroid nodules, and risk stratification of thyroid carcinoma were divided into four levels: very high risk group (score ≥ 9 points), high risk group ( score were 5-8 points), moderate risk group ( score were 3 ~ 4 points), low risk group ( score ≤ 2 points). The sensitivity, specificity, and accuracy of FNAC were 86. 3% , 90. 0% , and 87. 0% respectively, AUC=0. 891, while the sensitivity, specificity, and accuracy of PTC risk rating scale were 83. 8% , 70. 0% , and 81. 0%respectively, AUC = 0. 822. The sensitivity, specificity, and accuracy of their combined diagnosis were 97. 5% , 85. 0% , and 95. 0% , AUC=0. 965. This risk score can be used as a screening method before FNAC. If combined with FNAC, it may improve the diagnostic efficacy of PTC, and thereby possibly minimizing the unnecessary invasive examination and surgical treatment for patients with thyroid nodules and reducing personal costs.

Objective: To understand the epidemic trend of tobacco use among junior middle school students in Shunyi District of Beijing in recent 5 years, and to provide scientific basis for formulating adolescent tobacco control strategies and intervention measures. Methods: The two stage sampling method was used to survey 3 junior middle school schools randomly selected from Shunyi District, Beijing, in November 2013, December 2015 and November 2017. The number of students surveyed each year was 1 520, 1 404 and 1 467 respectively. Results: A total of 4 500 questionnaires were distributed and 4 391 questionnaires were valid, with an effective rate of 97.6%. The current smoking rate and the attempting smoking rate in Shunyi District junior high school students increased substantially, the difference was statistically significant(χ2=9.15, 11.54, P<0.01). The exposure rate of second-hand smoke among junior high school students in Shunyi District is increasing year by year. The current smoking rate and the attempting smoking rate of second-hand smoke at home and in public places were higher than those of non-exposed ones. The differences in the current smoking rates of junior high school students (χ2=25.86, 37.61, P<0.01) and the attempting smoking rate (χ2=49.51, 63-86, P<0.01) were statistically significant. The influence of Shunyi District junior high school students through different tobacco information access channels on the current smoking rate of junior high school students increased year by year. Different tobacco information access channels have significant difference in the influence of the junior middle school students’ attempting smoking rate(P<0.05). Conclusion The overall tobacco use of junior high school students in Shunyi District of Beijing is increasing by year. The exposure of second-hand smoke is not optimistic, and the supervision of tobacco information acquisition channels is urgent to be strengthened.

Objective:To explore the correlation between blood glucose level and parental education level in children with type 1 diabetes mellitus (T1DM) based on mobile health APP.Methods:The data of T1DM children enrolled in China′s T1DM registration management program and registered to use TangTangquan ? were collected, as well as the blood glucose monitoring information uploaded quarterly after registration. Children were divided into low education group (middle school or below) and high education group (junior college or above) according to their parents′ education level. Blood glucose levels were compared between the two groups at different time points. Spearman correlation analysis and multivariate logistic regression analysis were used to evaluate the correlation between blood glucose level and parents′ education level in children with T1DM. Results:A total of 2 263 eligible children with T1DM were included and 1 246 were female (55.1%). The median age was 7.9(4.4, 11.4)years and T1DM duration was 0.07(0.02, 0.46)years. Among them, 1 513 cases were in the low-education group while 750 cases were in the high-education group. Within three years after registration, the glucose levels of each interval in the low-education group were increasing gradually (all P<0.05 except post-breakfast glucose). The glucose levels of each interval in the high-education group in the third year were lower than those in the low-education group (all P<0.05 except nocturnal glucose). The result of multivariate logistic regression analysis showed that after the adjustment of factors including T1DM duration and treatment, parental educational levels were still the separate related factors of premeal glucose, bedtime glucose and nocturnal glucose (premeal glucose: OR=0.385, 95% CI: 0.164-0.874, P=0.025; bedtime glucose: OR=0.444, 95% CI: 0.204-0.949, P=0.038; nocturnal glucose: OR=0.226, 95% CI: 0.582-0.747, P=0.020). Conclusions:The blood glucose levels of children with T1DM were negatively associated with parental educational levels. It is suggested that parental educational levels should be taken into consideration in the management of T1DM for children.