A cardiac stimulator for rapid atrial pacing animal model was designed in this paper. According to the needs of clinical research, output pulse parameters of the cardiac stimulator can be designed. The cardiac stimulator will be controlled through magnet. Efficiency of the cardiac stimulator was validated by animal experiments.
Animals ; Cardiac Pacing, Artificial ; Electric Stimulation ; instrumentation ; methods ; Equipment Design ; Heart Atria ; Models, Animal

The system applies H.264 compression coding technology and uses TCP/IP protocol to transmit data. It transfers the video information, cardio-spectrograms, blood oxygen and blood pressure spectrum to the medical area and the visiting area for families that outside of ICU intensively. The patients' information is transmitted to the medical staffs intensively, then making the relevant backups, so people can avoid many potential medical disputes.
Blood Pressure ; Data Compression ; Heart ; Humans ; Intensive Care Units ; Monitoring, Physiologic ; instrumentation ; Technology ; Video Recording

OBJECTIVE:To evaluate the feasibility and effectiveness of Hazard analysis and critical control point (HACCP) system in the process of production of Loratadine tablets. METHODS:Taking wet granulation and tableting technology of Lorata-dine tablets as an example,and through the introduction of the concept of HACCP,the basic theory and method of HACCP were applied for hazard analysis on each production link to find critical control points and set critical limits for production quality man-agement. RESULTS:By HACCP analysis,three links namely drying,granules fitting and mixing,internal and external packaging were finally determined as the critical control points in the process of production of Loratadine tablets,thereby critical control lim-its were set for monitoring. After effective control over the risks in the process was ensured,HACCP work plan was made and veri-fied,and the results showed that HACCP system could effectively control and reduce the risks in the process of production and en-sure quality safety. CONCLUSIONS:Application of HACCP system to wet granulation and tableting technology of Loratadine tab-lets can fully embody its feasibility and effectiveness.

Objective To investigate the relationship between uric acid levels and lipid metabolism in Uyghur and Han people who underwent physical examination.Methods From February 2012 to February 2013,8 197 blood samples were collected for the tests of serum uric acid and some other relevant lipid metabolism indicators in the First Affiliated Hospital of Xinjiang Medical Uni-versity.Results The uric acid level of Han was higher than that of Uyghur people(P <0.05),the levels of uric acid has gradually increased with the growing age both in the Uygur and Han people.The uric acid and high-density lipoprotein and apolipoprotein-A showed negative correlation between Uyghur and Han(P <0.05),however,the uric acid and other factors showed positive correla-tion(P <0.05).Conclusion There is ethnic differences in the level of uric acid and the prevalence of hyperuricemia in people who underwent physical examination of Urumqi,there are correlations between uric acid levels and the lipid metabolism.

Objective To evaluate the image deformation and measurement error of rotational DSA by model experiment. Methods Five steel balls (diameter: 20 mm) were placed in a horizontal space of 30 mm, the middle of which was as the isocenter for rotational DSA acquisition. Another 5 steel balls (diameter: 10 mm) were placed in a vertical space of 30 mm with the same alignment for rotational DSA acquisition. The screen was divided into five regions and the morphological changes of the ball image were observed at each rotation angle. The experimental images of the left anterior oblique ball images at 20°, 40°and 60° among each two groups were selected and measured by automatic isocenter calibration and sphere calibration respectively, and compared with the actual diameters of balls to calculate the image magnification. Results Except the center one, other balls were of deformation at different rotation angles due to the distance to the detector leading to enlargement and reduction. With automatic isocenter calibration, only the diameter of the center ball corresponded with the actual one, the distance away from the center or the rotation angle was inversely proportional to measurement error (maximum magnification 12.42%).With sphere calibration, the measurement results in various regions at different rotation angle were basically the same, with smaller measurement error (maximum magnification 3.41%). Conclusion Placing the organ of interest in the center area can reduce image distortion in rotational DSA imaging. Selecting reasonable measuring technology according to the lesion location is helpful to control measurement errors.

Harmful substances are produced during the metabolism of alcohol in the human body, which causes liver disease.The mechanism of oxidative stress is the main pathogenesis of alcoholic liver disease, which plays a major role in the occurrence and development of alcoholic liver disease.Alcohol-induced oxidative stress mediated by reactive oxygen species(ROS)/reactive nitrogen species(RNS) brings about liver disease via apoptotic signaling pathway and MAPK signaling pathway, and alleviates liver disease through Nrf2 signaling pathway.In this paper, the studies on the mechanism of oxidative stress in alcoholic liver disease are reviewed.

Objective To investigate the clinical efficacy of TCM external treatment combined with Dasangju Mixture in treating mycoplasma pneumoniae pneumonia (MPP) in children. Methods One hundred patients with MPP were randomly divided into control group and treatment group by parallel design, with 50 patients in each group. Patients in control group orally took azithromycin combined with other symptomatic treatment when necessary, 7 d for a course and continuously for 3 courses. Based on the treatment for control group, patients in treatment group were added with TCM external treatment (BL13 and RN17) combined with Dasangju Mixture, while azithromycin was sequentially used just for 2 courses. Other types of treatment lasted for 3 courses. The improvement time of symptoms and signs of the patients were recorded and the therapeutic effects of the two groups were evaluated. Moreover, the serum concentrations of mycoplasma pneumoniae-immune gloulin M (MP-IgM) were determined before and after treatment on the 1st and 21st days. Results The improvent time of fever, and cough and lung sign of the treatment group were more obviously shortened than the control group (P<0.05). The total effective rate was 96.0% (48/50) in observation group and 74.0% (37/50) in control group, with statistical significant difference between the two groups (P<0.05). After treatment, the negative rate of the serum concentration of MP-IgM in the treatment group was 82%, and that of the control group was 58%, with statistical significance between the two groups (P<0.05).Conclusion TCM external treatment combined with Dasangju Mixture can not only significantly improve the clinical symptoms and signs of MPP children patients, but also shorten the disease course, and the efficacy was significant. Meanwhile it can reduce the course and side effects of azithromycin, which provides reference to the administration of antibiotics in children.

Objective To investigate the protective effects ofDasangju Mixture on the liver injury induced by delayed-type hypersensitivity in mice; To discuss its mechanism of anti-inflammatory-immunity.Methods After enterocoelia intravenous injection of cyclophosphamide was used, 2,4,6-picryl chloride was used twice for exterior coating for skin of abdomen to cause sensation of skin. Then percutaneous transhepatic puncture was used to attack for modeling. Male Kunming mice were randomly divided into blank group, model group, high-, medium- and low-dose treatment groups. The high-, medium- and low-dose treatment groups were given Dasangju Mixture for gavage, once a day for 7 days. ELISA was applied to determine the serum levels of aspartate aminotransferase (AST), alamine aminotransferase (ALT) and tumor necrosis factor (TNF)-α. Pathological features of liver tissue were observed by HE staining.Results Compared with the blank group, the levels of AST, ALT and TNF-α in the model group increased significantly (P<0.05); Compared with the model group, the levels of AST, ALT and TNF-α in the high-, medium- and low-dose treatment groups decreased significantly (P<0.05,P<0.01,P<0.001); Compared with the model group, high-, medium- and low-dose treatment groups can better alleviate topical inflammation infiltration and edema of liver tissue.ConclusionDasangju Mixture has certain protective effects on the liver injury induced by delayed-type hypersensitivity in mice.

Objective To investigate the changes of protein and energy intakes and the z-score of weight for age in appropriate for gestational age (AGA) and small for gestational age (SGA) preterm infants with gestational age less than 34 weeks. Methods The data from 314 hospitalized premature infants ( 268 cases of AGA and 46 cases of SGA) during January 2012 to December 2014 were retrospectively collected. The intakes of protein and energy and the changes of weight within 2 weeks after birth were compared. Results Compared with AGA group, the hospital stays, durations of parenteral and enteral nutrition and total enteral nutrition, and time to achieve full dose feeding were signiifcantly longer in SGA group (P?

Objective To evaluate the feasibility of apply Ion Proton semiconductor sequencing platform in non-invasive prenatal genetic diagnosis .Methods Totally 1 000 pregnant women with a singleton pregnancy of 12-32 weeks gestation were selected from the Third affiliated Hospital of Zhengzhou University from Jan to Dec 2013.Using noninvasive prenatal genetic diagnosis based on Ion Proton semiconductor sequencing platform to study their cffDNA .In parallel, 72 pregnant women received invasive prenatal diagnosis by traditional chromosomal analysis with amniocentesis chorionic villus sampling .Results It′s shown that 18 out of 1 000 (1.8%) pregnant women underwent the noninvasive prenatal genetic testing had a high risk for aneuploid chromosomes , including 7 cases of 21-trisomy, 4 cases of 18-trisomy, 2 cases of 13-trisomy, 4 cases of sex chromosomal abnormality , and 1 case of 15-trisomy.It demonstrated that the rate and accuracy of fetal 21-trisomy, 13-trisomy and 18-trisomy by non-invasive prenatal genetic testing were both 100%without misdiagnosis , the rate of detection for sex chromosomal abnormality was 2/2 with a false positive rate of 1/3.However, the 15-trisomy predicted by the non-invasive prenatal diagnosis in a woman was finally proved to be a false positive .Based on the results by karyotyping (55/55) as well as follow-ups (493/493), the specificity of the non-invasive prenatal diagnosis for detection of 21-trisomy, 18-trisomy and 13-trisomy was 100%.One Ion PITM chip could detect 12 to 15 samples in 1.5 h and the whole process of noninvasive detection could be completed in 1 to 1.5 days.Conclusions The non-invasive prenatal diagnosis by Ion Proton semiconductor sequencing platform could provide fast and accurate detection of fetal aneuploidy .The benchtop high-throughput sequencing platform has laid the foundation for the independent application in clinical settings for fetal aneuploidy detection .