Objective:To establish a method to determine the residual solvents in salvianolic acid B. Methods: The headspace GC was carried out on an HP-5 capillary column(30 m × 0. 32 mm,0. 6 μm). The inlet temperature was 180℃. The injection volume was 0. 1ml and the separation ratio was 1:10. The column temperature was programmed:the initial temperature was 40℃, malntalned for 6 min, ralsed to 180℃ with a rate of 15 ℃·min-1 , and malntalned for another 5 min. The detector was FID with the temperature of 250℃. The carrier gas was N2 with the flow rate of 1. 7 ml·min-1 . DMSO was used as the solvent for salvianolic acid B. Results:All solvents could be separated completely. The linear range of ethanol, acetone and ethyl acetate was 12. 650-1. 012 × 103 μg·ml-1 (r=0.999 3),12.750-1.012 ×103 μg·ml-1(r=0.999 7) and 12.550-1.004 ×103 μg·ml-1(r=0.999 7), respectively. The average recovery of ethanol, acetone and ethyl acetate was 96. 89% (RSD=3. 81%,n=9), 99. 56% (RSD=4. 05%,n=9) and 97. 21% (RSD=4. 95%,n=9), respectively. Conclusion:The method is simple, reproducible and accurate enough for the determi-nation of residual solvents in salvianolic acid B.

Emergency in public health is one major issue relating to the national economy and the people's livelihood.In dealing with the key technologies of detects,diagnosis,disinfection,prevention and control,it is wise to syncretize the correlated subjects in nucleus,chemistry and biology,improve the support condition of teaching,strengthen the reform of teaching contents,add some lessons of emergency treatment,make emergency equipments,and form the ability of rapid diagnosis on the spot and precise identifying in lab,for cultivating the students'capability of spot handling,organization and command,and furthermore exploring and practicing the training pattern of the public heath talent with high quality and emergency ability in our country.

ObjectiveTo study the occurrence and influence factors of drug-induced injuries of vital organs caused by traditional Chinese medicine injection.MethodsChina Hospital Knowledge Database (CHKD) from 1993-2013 and case reports concerning adverse effects and drug-induced diseases caused by traditional Chinese medicine injection from Wanfang Data Knowledge Service Platformwere retrieved. Indicator systemwasestablished and relevant contentsweresummarized and analyzed.Results34 types of traditional Chinese medicine injectionswereincluded and 699 drug-induced diseasesweresummarized, taking up 53.98% of the total adverse effects. Among them, the top three included in the drug-induced diseaseswere acanthopanax injection, safflower injection and Mailuoning injection. The non-conformance between the traditional Chinese medicine injections in the literature and instructions mainly reflects unreasonable solvent selection, large compatibility concentration and usage and dosage beyond those specified in the instructions. ConclusionThe occurrence of drug-induced injuries of vital organs caused by traditional Chinese medicine injectionis relatively high, drug instructions shall be strictly followed in accordance with requirements during clinical application.

ObjectiveTo investigate the relationship between intervertebral disc pressure and clinical efficacy after the minimally invasive treatment of cervical disc herniation. MethodsForty-seven patients with cervical disc herniation treated by disc radiofrequency ablation, and monitored the intervertebral disc pressure after that. Moreover, the correlation between the pressure and the clinical efficacy was observed. ResultsAll cases were successfully completed under pressure monitoring. Forty-seven cases underwent a follow-up of 1-25 months,according to JOA score,using postoperative improvement rate (Hirabashi formula) to assess the clinical efficacy. High efficacy in 25 cases,fine efficacy in 19 cases,good efficacy in 3 cases,high and fine efficacy rate was 93.6％ (44/47). The postoperative intervertebral discpressure was significantly correlated with improvement rate after cervical minimally invasive surgery (P ＜0.05). ConclusionsRadiofrequency ablation treatment of cervical disc herniation is safe and effective minimally invasive technique. If the pressure in the postoperative intervertebral disc is 3 kPa,it will get better prognosis.

Aged ; Cerebrospinal Fluid Rhinorrhea ; etiology ; prevention & control ; therapy ; Female ; Humans ; Male ; Nose Neoplasms ; radiotherapy ; Paranasal Sinus Neoplasms ; radiotherapy ; Young Adult

Objective To study the effects of electromagnetic field (EMF) exposure on osteoporosis in ovariectomized mice. Methods Sixty 8-week-old female Kunming mice were divided into four groups at random: a sham operation group (group A), an ovariectomized group (group B), an EMF and ovariectomized group (group C) and a nilestriol and ovariectomized group (group D). Bilateral ovariectomies were performed on all mice except those in group A. The mice of group C were exposured to a 15 Hz, 1.0 mT electromagnetic field. The mice of group D were given at nilestriol 1.5 mg/kg/week. The bone mineral density (BMD) of the lumbar vertebrae was measured before the mice were sacrificed at the 12th week. Blood specimens were collected every two weeks to measure the ac-tivity of alkaline phosphatase (ALP) and the concentration of bone gamma-carboxyglutamic-acid-containing proteins (BGP), calcium and estradiol in the serum. Histological sections were taken to examine and analyze the changes in bone trabeculae in the lumbar vertebrae after 6 and 12 weeks. Results EMF at 15 Hz and 1.0 mT intensity signifi-cantly increased the activity of ALP and the concentrations of BGP and calcium in the serum. In addition, the absorp-tion of bone trabeculae in the lumbar vertebrae was significantly restrained. Conclusions EMF at 15 Hz and 1.0 mT can restrain the development of osteoporosis in ovariectomized mice.

Objective To study the effects of an electromagnetic field (EMF) on the expression of fibro-blast growth factor (FGF-2) and it' s receptor (FGFR-2) mRNA in rat bone marrow mesenchymal stem cells (BMSCs) in vitro. Methods Rat BMSCs were isolated and cultured in vitro. The subcultured cells were divided into different groups to be EMF stimulated at 1.0 mT. The expression of FGF-2 and FGFR-2 mRNA were detected by reverse transcription-polymerase chain reaction (RT-PCR). Results Different frequencies and durations of 1.0 mT EMF exposure induced FGF-2 and FGFR-2 mRNA expression in comparison to blank controls. The expression of FGF-2 mRNA reached a peak after stimulation at 15 Hz for 10 min, 50 Hz for 60 min and 75 Hz for 30 min. And the expression of FGFR-2 mRNA reached a peak after 30 minutes at all frequencies. At 1.0 mT with 30 min exposure, the expression of FGF-2 mRNA peaked after 50 Hz stimulation, and the expression of FGFR-2 mRNA peaked after stimulation at 75 Hz. Conclusions Moderate EMF stimulation can significantly increase the expression of FGF-2 and FGFR-2 mRNA in rat BMSCs in vitro.

Objective The purpose d this investigation was to evaluate the effect d influenza vaccination among medical staff. Methods We chose 134 medical staff who worked in out-patient department and the wards and received influenza vaccination as the inoculation group, 135 medical staff who did not receive influenza vaccination as the non-inoculation group. Investigation with questionnaires was carried out in the two groups 3 months after vaccination. Results The incidence rate of influenza-like disease in the observation group and the control group was 11.2% and 18.5% respectively. The protective rate was 39.46%. The average illness process of influenza-like disease in the observation group and the control group was 1.73 days and 2.96 days. The percent of patients with no medication, one kind of drug medication and two kinds of drag medication was 46.7%, 33.3% and 20.0% in the observation group and 32.0%, 8.0% and 60.0% in the control group. Conclusion Influenza vaccination exerted protective effect for medical staff and other people at high risk of emergency.

BACKGROUND: The treatment of upper cervical spine disorders through a posterior pedicle fixation approach have been carried out in some domestic large hospitals, but this surgery is still considered as a difficulty of cervical spine surgery. In order to minimize the risk of surgery, the authors designed a program of individual operations, and combined with self-developed pedicle locating and directing speculum to determine precise intraoperative position of pedicle screws, and no report is found by searching related database in China.OBJECTIVE: To improve the one-time success rate of internal fixation screws, to investigate the biomechanical effect of the implant, to formulate a simple, practical, individual protocol for atiantoaxial pedicle screw-plate system based on related data. METHODS: A total of 31 patients were recruited from Department of Orthopaedics in the 251 Hospital of Chinese PLA, between January 2002 and September 2006. Under the guidance of self-made atlantoaxial locating and directing speculum, the entrance point and angle for screw insertion, as well as screw diameter and length were determined according to the results of X-ray and CT measurement. Atlas pedicle screw was inserted at left (19.93±1.32) mm, and right (19.16±1.3) mm; Atlas pedicle screw insertion angle to inside was left (23.72±2.09)°, and right (23.35±1.91)°; Atlas pedicle screw insertion angle to side of head was (9.00±1.20)°. Axis pedicle screw was inserted at left (13.14±0.82) mm, and right (13.85±0.79) mm; Axis pedicle screw insertion angle to inside was left (24.52±1.26)°, and right (20.42±1.42)°; Axis pedicle screw insertion angle to side of head was (25.00±3.00)°.RESULTS AND CONCLUSION: ①Totally 124 pedicle screws were implanted into 31 patients, and 122 screws were of one-time success. The precision rate was 98.39%. Two screws were secondly inserted because of cutting lateral cortical bone of pedicle for deviation of inward angle. ②Occipital neuralgia was found in 2 cases postoperatively and cured after one month of treatment;screws penetrated atlas left vertebral lateral wall in 2 cases, no spinal or vertebral artery injury was found. ③Radiographs showed that atlas was completely reduced in all patients, and apposition of dentoid process of axis fracture was good. CT films showed the screws a good location to the vertebrarterial spinal cord. ④The follow-up visit was averaged of 10.5 months. Bony fusion was found in all patients. No screw-plate breakage was found. No inflammatory or rejection reactions occurred.⑤By JOA scale, there were 16 cases of excellent, 12 cases of good, 2 cases of fine, and 1 case of poor. The excellent and good rate was 90%. It is suggested that the success rate of atlantoaxial pedicle screw-plate mplantation can be improved through a biomechanical angle.

Lifitegrast is a novel inhibitor of integrin,which can take effect by blocking the binding of intercellular adhesion molecule 1 and integrin lymphocyte function associated antigen 1.In July 2016,the U.S.Food and Drug Administration (FDA) officially approved the application of lifitegrast ophthalmic solution 5％ (commodity name XiidraTM).Clinical trials of the drug include a 12-week phase II clinical trial and three 12-week phase III clinical trials for dry eye disease patients.The results of clinical trials have demonstrated the efficacy and safety of the drug.Lifitegrast is the first FDA approved drug to improve and treat dry eye symptoms,and other similar drug is only cyclosporine.It is believed that in the near future clinical application of lifitegrast will be more extensive.