Assistive technology has been one of key words in the field of special education. It will also be new trend of special educational development. In the article, the authors firstly introduced the definition of assistive technology device and assistive technology service and discussed the relationship between assistive technology and educational technology, and special educational changes in technology and idea because of the use of assistive technology, at last, some suggestions to enhance the use of assistive technology were put forward.

A questionnaire survey on the awareness and knowledge about stroke was conducted in 392 residents of Fangzhuang community.The results showed residents in Fangzhuang had high awareness rate about stroke,the rates of knowing early symptoms of stroke were from 57.91％ to 79.08％.83.16％ (326) of residents knew to dial 120 or 999 at emergency.The community doctors were thought as the main resource of gaining the knowledge of stroke (78.32％ ).The results indicate that Fangzhuang community health service center plays an important role in health education and guidance for emergent management of stroke in the community.

BACKGROUND: Anterior cervical discectomy and fusion (ACDF) is a gold standard to treat degenerative cervical syndrome. However, with the increasing application and follow-up data of ACDF, its adverse effects have been shown. In the past 20 years,artificial cervical disc replacement has been widely used in clinic, and the therapeutic effect is favorable.OBJECTIVE: To assess the effect of cervical disc replacement versus ACDF for cervical radiculopathy or myelopathy.METHODS: A computer-based online search of Medline (1966/2009-06), Embase (1966/2009-06), CBM (2009-06) and CNKI(2009-06), as well as Cochrane Back Group, and Cochrane library were performed to collect randomized controlled trials of cervical disc replacement versus ACDF. Data were evaluated by RevMan4.2.2 for Meta analysis.RESULTS AND CONCLUSION: A total of 15 studies were included. Meta-analysis indicates that no differences were found in the mean operation time, mean blood loss, mean hospital stay, satisfaction rate, and complication between two groups; the reoperation rate of the disc replacement group was lower than ACDF group in two years postoperation; disc replacement group was more efficient in improving cervical function indexes than ACDF group, and the postoperative SF-36 scores were significantly more than ACDF group. Moreover, postoperative motion range of affected segment was significantly greater in the disc replacement group than the ACDF, and the motion rage of adjacent segment was significantly increased in patients underwent ACDF compared with disc replacement treatment. However, there may be bias, more randomized controlled trials are required.

Metallic cancellous screw is one of the fixation devices widely used for bone fractures. It has always been reported that many cases of internal fixation failed just because of screw loosening or pullout. The stability of fixation is associated with the pullout strength of screws. The pullout strength strongly depends on the geometrical design of the screw thread, the material and the insertion technique of the screw, and the bone mineral density of the insertion site of the screw.

Objective To observe the changes in acid-base balance and the contents of electrolytes in patients during liver transplantation to explore the relationship between such changes and ASA grading, and to look for an optimal anesthetic intervention. Methods Arterial pH, PaO_2, PaCO_2, HCO~-_3, BE, K~+, Ca~ 2+ , Na~+, and glucose were monitored in 89 patients undergoing liver transplantation at four specific periods: before anesthesia (T_0), after skin incision (T1), 10 minutes before reperfusion (T_2), and 10 minutes after reperfusion (T_3). Changes in blood acid-base and electrolyte parameters of the patients with different ASA status were compared. Result The pH and BE in ASA V patients was significantly lower at T_0, T_1, T_2 and T_3, and HCO~-_3 was lower in ASA V at T_3. The PaCO_2 in ASA V patients was significantly higher at T_0, T_1 and T_2. The Na~+ content in ASA V patients was significant higher at T_2 and T_3. At T_0 and T_1, the glucose level in ASA Ⅳ and Ⅴ were significant higher than in ASAⅢ. Significant differences in pH, PaCO_2, HCO~-_3, BE and glucose level were observed at different stages of the surgical procedure. The pH, BE and HCO~-_3 were significantly lowered at T_2 and T_3. Mean glucose and HR levels were gradually increased from T_1 to T_3. Conclusion Patients with advanced ASA grades are more prone to acid-base and electrolyte disturbances during reperfusion of the liver transplant. High ASA grades contitute an increased risk for cardiovascular collapse after reperfusion, calling for proper treatment.

Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis complex and is mainly manifested as pulmonary tuberculosis. Mycobacterium tuberculosis is characterized by high pathogenicity and drug resistance due to its high viability and lethality, and multidrug-resistant tuberculosis caused by it has become a global public health problem. Early and effective treatment is essential to prevent the emergence of drug-resistant strains. Commonly employed methods for the screening and diagnosis of TB include: clinical signs, imaging examinations (chest X-ray, computed tomography), sputum culture (L-J medium, BACTEC liquid culture system), and immunological tests (lipoarabinomannan antigen test, tuberculin skin test, interferon-gamma release test). In recent years, emerging molecular diagnostic methods such as GeneXpert MTB/RIF assay, loop-mediated isothermal amplification (LAMP), linear probe assay, and whole-genome sequencing have been used to diagnose and characterize TB. These methods not only identify Mycobacterium tuberculosis but also detect mutation sites associated with resistance to first-line anti-tuberculosis drugs (isoniazid, rifampicin, etc.), providing new possibilities for the diagnosis of drug-resistant Mycobacterium tuberculosis. In this paper, the advantages and disadvantages of some commonly used detection methods for tuberculosis are first reviewed, aiming at assisting clinicians to diagnose and treat the disease in a timely manner. Secondly, this paper explores the prospects of the latest high-throughput detection methods for drug-resistant Mycobacterium tuberculosis.

Histaminergic neurons solely originate from the tuberomammillary nucleus (TMN) in the posterior hypothalamus and send widespread projections to the whole brain. Experiments in rats show that histamine release in the central nervous system is positively correlated with wakefulness and the histamine released is 4 times higher during wake episodes than during sleep episodes. Endogeneous prostaglandin E2 and orexin activate histaminergic neurons in the TMN to release histamine and promote wakefulness. Conversely, prostaglandin D2 and adenosine inhibit histamine release by increasing GABA release in the TMN to induce sleep. This paper reviews the effects and mechanisms of action of the histaminergic system on sleep-wake regulation, and briefly discusses the possibility of developing novel sedative-hypnotics and wakefulness-promoting drugs related to the histaminergic system.

A method was developed for purification of 20S proteasome (20S core particle, CP) by combining differential centrifugations with nondenaturing polyacrylamide gel electrophoresis (native-PAGE), irrespective of species origins of CPs. CP purified from human erythrocytes was subjected to proteomic analysis by two-dimensional gel electrophoresis (2-DE) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), revealing 33 spots of subunit isoforms with different molecular weights and isoelectric points, more than 14 constituent subunits. Furthermore, other four CPs were purified from yeast, mouse liver, two pancreatic cancer cell lines SW1990 and PANC-1 using this method mentioned above, and subjected to proteasome heterogeneity analysis by native/SDS-PAGE (native/sodium dodecyl sulphate polyacrylamide gel electrophoresis), together with CP from erythrocytes. The method described acts as a rapid and effective tool for CP isolations, and the results obtained may be served as a footstone for the investigations of species-dependent proteasome heterogeneity.

This study was aimed to identify Bletilla Striata (Thunb.) Reichb.f.and Bletilla Formosana (Hayata) Schltr.by ITS2 sequence.The leaves of 38 samples of Bletilla striata and Bletillaformosana from Yunnan,Hubei,Guizhou,Hunan and Sichuan province were used as experiment materials.The total DNA was extracted.Internal transcribed spacer 2 (ITS2) sequences were obtained by PCR.All of the ITS2 sequences were checked.The 8 ITS2 sequences from two species were downloaded from GenBank.The intraspecific and interspecific Kimura-2-parameter (K2P) distances of Bletilla striata and Bletilla formosana were calculated by MEGAS.0.And neighbor-joining (NJ) tree was constructed.The results showed that the full-length sequences of ITS2 from Bletilla striata and Bletillaformosana were 259 bp,with a total of 14 variable sites.The maximum intraspecific K2P distance of Bletilla striata and Bletillaformosana was 0.008,while the minimum interspecific K2P distance was 0.040.The ITS2 secondary structure showed that different origins of Bletilla striata were gathered together and could be distinguished obviously from Bletilla formosana by NJ tree.It was concluded that ITS2 sequence was able to identify Bletilla striata and Bletillaformosana quickly and accurately.

Objective: To investigate the relationship between heart rate variability (HRV), blood pressure variability (BPV) and autonomic nerve function, blood vessel damage in patients with essential hypertension (EH) via synchronous monitoring. Methods: A total of 275 EH patients admitted to our hospital from 2011-04 to 2014-01 were enrolled. The vascular function was assessed by carotid-femoral pulse wave velocity (PWV). Based on PWV, the patients were divided into 2 groups: Normal PWV group (PWV<9m/s),n=185 and High PWV group (PWV≥9m/s),n=90. Synchronic 24h dynamic electrocardiogram (Holter) and 24h ambulatory blood pressure monitoring (ABPM) were performed in all patients. t-test, chi-square test, person liner correlation study and multi stepwise regression analysis were conducted to explore the relationship between HRV, PBV and PWV. Results: HRV and BPV in High PWV group had been changed unusually. Compared with Normal PWV group, High PWV group showed decreased standard deviation of the average of all normal-to-normal intervals in all 5-minute intervals (SDANN) (159.66±66.50) ms vs (194.36±119.29) ms and increased 24 h systolic blood pressure standard deviation (24h SSD) (14.40±3.65) mmHg vs (12.98±3.46) mmHg, all P<0.01; increased new index of night/day HR ratio (0.90±0.08) vs (0.87±0.06), P<0.01 and it had liner correlation to PWV (r=0.169, P=0.005). Multi stepwise liner regression analysis indicated that 24hSSD and HRV at low frequency (LF) portion had obvious and independent correlation to PWV (standard β value=0.352 and 0.212 respectively). Conclusion: ① EP patients were with decreased HRV (SDANN), increased BPV (24h SSD) and the higher incidence of arteriosclerosis; 24h SSD and HRV at LF portion were the most 2 important risk factors affecting PWV. ②Autonomic nerve dysfunction, vagus nerve over-excitatory were the independent risk factors for promoting the occurrence and development of arteriosclerosis in EH patients. ③Night/day HR ratio as a sensitive index for examining autonomic nerve function was independently related to hypertensive vessel damage. Synchronic monitoring of HRV and BPV is helpful to identify blood vessel damage in EH patients.