This paper develops a USB signal acquisition card to introduce ECG signal into the computer for display, storagee and analysis. Such aspects get involved in as the acquisition, amplification, filter and AD conversion as well as the principle and structure of USB transmission circuit. MSP430 series of SCMs of TI Corp and SPCP825 chip of SunPlus Corp are adopted as the micro-controller and USB transmission chip respectively.

A system adapted for depot management in hospital based on RFID technology is introduced. With resolution of RFID from PHILIPS and RF transmission from Nordic VLSI Norway, the storage of medical materials and medical equipments can be identified, labeled and statistically controlled accurately and expediently. The system can not only save a mass of work force, but also improve work efficiency.

Objective: To analyze the current status of latent tuberculosis infection (LTBI) among freshmen in boarding middle schools in Longgang District, Shenzhen, so as to provide reference for formulating tuberculosis prevention and control strategies in the next stage. Methods: Data for tuberculosis health examination conducted among primary and secondary school students in Longgang District of Shenzhen in September 2022 to May 2023 were utilized to analyze the latent tuberculosis infection rate, and to explore the differences in latent tuberculosis infection rate among different grades, school nature, school categories and school levels. Results: The latent tuberculosis infection rate among freshmen in boarding secondary schools in Longgang District, Shenzhen in 2022 was 2.45%. The infection rate among full middle school (6.45%) and high school (3.37%) were higher than that in boarding junior high school (0.28%), nine year education school (0) and twelve year education school (1.00%) ( P <0.01). Moreover, the infection rate of high school freshmen (2.68%) was higher than that of bording junior high school (0.33%), and the rate of public schools (2.87%) and municipal schools (3.24%) were higher than those of private schools (1.78%) and distric-level schools (2.13%) respectively, with statistical significance observed for all differences( χ 2=43.58, 25.15, 22.69, P <0.01). Conclusions The latent tuberculosis infection rate among new boarding secondary students is relatively low in Longgang District of Shenzhen. However, the infection rate is higher in high school, public and municipal school. School should fully guarantee sports participation of students, enhance students awareness of tuberculosis through health knowledge lectures, and reduce the incidence of tuberculosis among students.

Objective To evaluate the value of color flow angio(CFA)in judging the status of thyroid function by analyzing the ultrasonographic features and quantitatively measuring the blood flow signals in patients with thyroid diffuse lesions.Methods Totally 100 patients with thyroid diffuse lesions diagnosed by ultrasonography between Oct.2016 and Jun.2017 were divided into three groups:hyperthyroidism group(n=30),hypothyroidism group(n=34)and euthyroid group(n=36).Moreover,30 cases of healthy volunteers were chosen as control group.The blood flow index including vascularity index(VI)value and Vascularity value of region of interest from all cases was measured through CFA imaging technique.The differences of VI and Vascularity from above 4 groups were compared using one-way analysis of variance.Comparison among groups was carried out by SNK-q test.The subjects' work curves(ROC curves)were plotted and analyzed using clinical diagnosis as gold standard.At the same time,the correlation between VI and thyroid function in hyperthyroid group and hypothyroidism group was analyzed through Pearson correlation coefficient.Results The levels of VI and Vascularity in hyperthyroid group,hypothyroid group,euthyroid group and control group were decreased gradually with significant differences between every two groups.VI : control vs hyperthyroid,hypothyroid and euthyroid group: q=13.67,7.00 and 3.93,all P＜0.01.Euthyroid vs hyperthyroidism and hypothyroid group: q=10.35,P＜0.01 and q=3.27,P＜0.05.Hyperthyroidism vs hypothyroid group: q=7.09,P＜0.01.Vascularity: control vs hyperthyroid,hypothyroid and euthyroid group: q=15.23,10.16 and 6.58,all P＜0.01.Euthyroid vs hyperthyroidism and hypothyroid group: q=9.33 and 3.83,both P＜0.01.Hyperthyroidism vs hypothyroid group: q=5.55,P＜0.01.The area under the curve of hyperthyroidism group and hypothyroidism group was 0.733,with 9.526%as the diagnostic cutoff point.The sensitivity and specificity were 70.0%and 76.5%respectively.The area under the curve of the abnormal group and normal group was 0.768,with 7.404%as the diagnostic cutoff point.The sensitivity and specificity were 62.5%and 88.9%,respectively.The VI value of hyperthyroidism group was positively correlated with FT3 and FT4(r=0.584,0.499,both P＜0.05),and negatively correlated with TSH(r=-0.447,P＜0.05).The VI value of hypothyroidism group was negatively correlated with FT4(r=-0.342,P＜0.05),and had no significant correlation with FT3 and TSH(r=0.121,-0.007,P＞0.05).Conclusion CFA imaging technology can quantitatively measure the blood flow signals of thyroid parenchyma and evaluate the thyroid function in patients with thyroid diffuse lesions.

Objective: To comb the development of transitional care, analyze and compare the research hotspots and frontiers at home and abroad. Methods: CNKI Database and Web of Science Core Collection were taken as data sources to retrieve the relevant literature published from 2000 to 2019; CiteSpace software was used to construct scientific knowledge maps for visualization analysis. Results: A total of 285 Chinese and 1 179 English documents were retrieved, and the annual publications showed an upward trend from 2012. The high-yield institutions and authors were relatively scattered. Chinese papers focused on subjective indicators such as quality of life, and most of which were literature review. While English papers tended to focus on objective indicators, such as readmission and mortality rate, and the research type was mainly intervention study. The Chinese keywords "WeChat" and English "palliative care" were with the strongest citation bursts in recent years. Conclusions The domestic development of transitional care is relatively lagging; cooperation between institutions and authors should be strengthened. Future researches on palliative care or combined with WeChat platform may become hotspots in this field.

This paper describes the development and validation of a liquid chromatography-mass spectrometric assay for propafenone and its application to a pharmacokinetic study of propafenone administered as a new propafenone hydrochloride sustained-release capsule (SR-test), as an instant-release tablet (IR-reference) and as the market leader sustained-release capsule (Rythmol, SR-reference) in male beagle dogs (n=8). In Study A comparing SR-test with IR-reference in a crossover design T max and t 1/2 of propafenone for SR-test were significantly higher than those for IR-reference while C max and AUC were lower demonstrating the sustained release properties of the new formulation. In Study B comparing SR-test with SR-reference the observed C max and AUC of propafenone for SR-test (124.5±140.0 ng/mL and 612.0±699.2 ng·h/mL, respectively) were higher than for SR-reference (78.52±72.92 ng/mL and 423.6±431.6 ng·h/mL, respectively) although the differences were not significant. Overall, the new formulation has as good if not better sustained release characteristics to the market leader formulation.

OBJECTIVE To investigate the effect and mechanism of Panax notoginseng saponins （PNS） on wound healing after anal fistula surgery in rats by regulating the hypoxia-inducible factor-1α （HIF-1α）/vascular endothelial growth factor （VEGF）/ vascular endothelial growth factor receptor-2 （VEGFR2） signaling pathway. METHODS SD rats were selected to establish a postoperative rat model of anal fistula by infecting wound with Escherichia coli. The model rats were randomly grouped into model group， PNS low-dose and high-dose groups （15， 30 mg/cm2）， high-dose of PNS+2-methoxyestradiol （2ME2） group （PNS 30 mg/cm2+HIF-1α inhibitor 2ME2 4 mg/kg）， with 10 rats in each group. Another 10 normal rats were selected for back hair removal treatment as the control group. Each drug group was injected with the corresponding drug solution intramuscularly or （and） intraperitoneally， once a day， for 3 weeks. After the last administration， the wound healing rate （excluding the control group）， microvascular density （MVD）， the expression of collagen Ⅰ and fibronectin （FN） in the wound tissue were detected in each group； the levels of angiogenic factors [VEGF， E-mail：842710813@qq.com angiopoietin-Ⅰ （Ang-Ⅰ）， Ang-Ⅱ] in serum， the levels of inflammatory factors [interleukin-6 （IL-6） and IL-2] in serum binggui7183@163.com and wound tissue as well as the expressions of the related proteins of HIF-1α/VEGF/VEGFR2 signaling pathway in the wound tissue of rats were also detected in each group. RESULTS The MVD， the expression of collagen Ⅰ and FN in the wound tissue， and the levels of IL-6 and IL-2 in serum and wound tissue of rats increased significantly in the model group， compared to the control group （P＜0.05）， while the serum levels of VEGF， Ang- Ⅰ and Ang-Ⅱ decreased significantly （P＜0.05）. The wound healing rate， the MVD in wound tissue， the serum levels of VEGF， Ang-Ⅰ and Ang-Ⅱ， the expressions of collagen Ⅰ and FN in the wound tissue， and protein expressions of HIF-1α， VEGF and VEGFR2 in the PNS low-dose and high-dose groups increased significantly， compared to the model group （P＜0.05）， while the levels of IL-6 and IL-2 in serum and wound tissue decreased significantly （P＜0.05）； the high-dose PNS had a stronger effect （P＜ 0.05）. 2ME2 could weaken the effect of PNS on above indicators of rats after anal fistula surgery （P＜0.05）. CONCLUSIONS PNS can promote the production of angiogenic factors and inhibit the production of pro-inflammatory factors， thereby promoting wound healing in rats after anal fistula surgery. The above effects are related to the activation of HIF-1α/VEGF/VEGFR2 signaling pathway.