In December, the outbreak of a novel coronavirus (2019-nCoV) in Wuhan, China, has attracted extensive global attention. On January 20, 2020,the Chinese health authorities upgraded the coronavirus to a Class B infectious disease in the Law of the People's Republic of China on the Prevention and Treatment of Infectious Diseases, and considered it as Class A infectious diseases in disease control and prevention. On January 22, 2020, the 2019-nCoV nucleic acid detection test was listed as the diagnostic criteria in the "guidelines for diagnosis and treatment of pneumonia due to 2019-nCoV (Trial Version 2)" . Therefore, standardizing the operation process of the 2019-nCoV nucleic acid detection in clinical laboratories has become a top priority. It is of paramount importance to establish standard protocols for detection of the 2019-nCoV nucleic acids in clinical laboratories to improve the reliability of the results and ensure the biosafety of laboratory personnel.

OBJECTIVE：To estab lish a me thod for simultaneous determination of morroniside ，loganin，echinacoside and acteoside in Huanshao capsules. METHODS ：HPLC method was adopted. The determination was performed on Zhongpuhong RD-C18 column with mobile phase consisted of acetonitrile- 0.1％ formic acid solution （gradient elution ）at the flow rate of 1.0 mL/min. The detection wavelength was set at 240 nm （morroniside，loganin） and 330 nm （echinacoside，acteoside）. The column temperature was set at 35 ℃，and sample size was 10 μL. RESULTS：The linear range were 5.29-105.80 μg/mL for morroniside， 4.49-89.88 mg/L for loganin ，16.26-325.25 mg/L for echinacoside and 16.31-326.25 mg/L for acteoside ，r values were 0.999 9. RSDs of precision ，stability （24 h），reproducibility and durability tests were all lower than 2.0％ . The recoveries were 94.34％ -96.23％（RSD＝0.81％ ，n＝6），97.04％ -98.89％（RSD＝0.73％ ，n＝6），96.23％ -98.08％（RSD＝0.82％ ，n＝6）， 95.40％-98.47％（RSD＝1.23％，n＝6），respectively. The contents of above 4 components in 11 batches of Huanshao Capsules were 0.190-0.704，0.439-0.857，2.723-4.475 and 0.589-1.035 mg/g，respectively. CONCLUSIONS ：Established method is specific ， precise and can be used for content determination of 4 components in Huanshao capsules.

In December, the outbreak of a novel coronavirus (2019-nCoV) in Wuhan, China, has attracted extensive global attention. On January 20, 2020, the Chinese health authorities upgraded the coronavirus to a Class B infectious disease in the Law of the People′s Republic of China on the Prevention and Treatment of Infectious Diseases, and considered it as Class A infectious diseases in disease control and prevention. On January 18, 2020, the 2019-nCoV nucleic acid detection test was listed as the diagnostic criteria in the "guidelines for diagnosis and treatment of pneumonia due to 2019-nCoV (Trial Version 2)" . Therefore, standardizing the operation process of the 2019-nCoV nucleic acid detection in clinical laboratories has become a top priority. It is of paramount importance to establish standard protocols for detection of the 2019-nCoV nucleic acids in clinical laboratories to improve the reliability of the results and ensure the biosafety of laboratory personnel.

Objective: To investigate the value of magnetic resonance image (MRI) sagittal three-dimensional fat suppression rapid phase shifting gradient echo (3D-FS-FSPGR) sequence in the diagnosis of knee joint cartilage injuries. Methods: 42 cases (44 knees joint cartilage injuries )in our hospital from February 2016 to May 2017 were selected, MRI scan was performed by 3D-FS-FSPGR scan.Arthroscopy was performed within one week. At the same time, 11 knee joint cartilages of 10 patients were examined pathologically. Results: The sensitivity, specificity and accuracy of 3D-FS-SPGR sequence diagnosis for knee joint cartilage injuries were 96.67%, 96.57% and 92.05% respectively; The Kappa value of 3D-FS-SPGR sequence and arthroscopy knee joint cartilage classification were 0.803 (P<0.05), with good consistency; The Kappa value of routine sequence and arthroscopy knee joint cartilage classification was 0.488 (P<0.05), with general consistency; The Kappa value of the 3D-FS-SPGR sequence and pathological grading of articular cartilage was 0.635 (P<0.05), with acceptable consistency. Conclusions The 3D-FS-SPGR sequence is of high diagnostic value in cartilage damage and grading of knee joint, and is consistent with pathological findings.

Objective: The incidence and distribution of positional deformities(PD)were studied by measuring cranial types of infants aged 0-6 months of 3 hospitals in Chongqing, and the recommended values of local PD were discussed. Methods: Data of 3 406 infants with 0-6 months head size measurements were collected from the Second Affiliated Hospital of Army Military Medical University, Yongchuan Maternal and Child Health Care Hospital and Wanzhou Maternal and Child Health Care Hospital from September 1, 2017 to August 31, 2018, cranial vault asymmetry(CVA)and cranial index(CI)were calculated.According to different age groups, observe the distribution of cranial types, and use the current international common diagnostic criteria to understand the incidence of cranial abnormalities, and analyze the distribution of percentile values of CVA and CI in infants in Chongqing. Results: According to the current international standard diagnosis of PD, the incidence of simple brachycephaly was the highest(39.9%)in the overall cranial abnormalities of infants, followed by brachycephaly with plagiocephaly was the second(36.1%), simple plagiocephaly was the lowest(6.9%), and normal cranial type only accounted for 17.1%.The detection rates of plagiocephaly(36.9%)and brachycephaly(67.0%)were the lowest in the 0-2 months group, and the highest in the 3-4 months group(47.3%/83.3%), and then decreased in the 5-6 months group(46.6%/80.2%). Conclusion The basic values of cranial type measurement of full-term infants in chongqing were significantly different from international reports, mainly due to the large CI value.The general international diagnosis standard for positional deformities do not conform to Chinese infants.We suggest that the reference value for positional deformities in this region is as follows: CVA≥0.4 cm is abnormal, of which 0.4 cm≤CVA<0.6 cm for mild plagiocephaly, 0.6 cm≤CVA<1.0 cm for moderate plagiocephaly, CVA≥1.0 cm for severe plagiocephaly; 82%≤CI≤91% is abnormal, of which 91%≤CI<94% for mild brachycephaly; 94% ≤CI<99% for moderate brachycephaly; CI≥ 99% for severe brachycephaly.CI≤82% is scaphocephaly.

Humans ; Air Pollutants ; Sleep Apnea, Obstructive ; Polysomnography ; Sleep ; Pulmonary Disease, Chronic Obstructive

OBJECTIVE: This study is aimed to report the development, the reliability and validity of the Chinese Children Physical Activity Questionnaire (CCPAQ) which was designed for the assessment of physical activity pattern in young population in China. METHODS: The CCPAQ was administered for two times in 119 children (mean age 13.1 ± 2.4 years; boys 47%) to examine reliability by using intraclass correlation coefficients. Validity was determined in 106 participants by agreement with the CCPAQ measures and the objective method, the ActiGraph accelerometer. Data on physical activity pattern including time spent on different intensities and total physical activity, sedentary behavior as well as physical activity energy expenditure were used to assess the validity with Spearman's correlation coefficient and the Bland-Altman plots. RESULTS: The reliability coefficient of the CCPAQ ranged from 0.63-0.93 (Intra-class correlation coefficient). Spearman's correlation coefficient for validity of time spent on total physical activity and sedentary behavior were all 0.32 (P < 0.001), and for physical activity energy expenditure was 0.58 (P < 0.001). Time spent on moderate-to-vigorous physical activity and light physical activity showed a relatively low correlation with the accelerometer (rho = 0.20, P = 0.040; rho = 0.19, P = 0.054). CONCLUSION The CCPAQ appears to be a promising and feasible method to assess physical activity pattern in Chinese children.

Objective:A high performance liquid chromatography-photo-diode array（HPLC-PDA） method for the simultaneous determination of the 7 phenolic acids including danshensu，protocatechuic acid，protocatechuic aldehyde，chlorogenic acid，caffeic acid，ferulic acid and rosemary acid in Lycopus lucidus var.hirtus rhizome，analyzing and evaluating the phenolic acids in L.lucidus var.hirtus rhizome collected from different habitats，is reported here. Method:The sample was extracted by ultrasonic with 80% methanol solution，7 kinds of phenolic acids were separated on a CAPCELL PAK C₁₈ column （4.6 mm×250 mm，5 μm） with a mobile phase consisting of methanol-0.02% formic acid aqueous （pH 3.10）by gradient elution，The detection wavelength was at 279，324 nm， the column temperature was 30 ℃ with 20 μL injection volume and the flow rate was 1.0 mL·min^-1. Result:The 7 Phenolic acids had a good linear relationship （r≥0.999 9） within their respective mass concentration ranges，the average recovery was 96.49%-103.45% and the RSD was 0.5%-2.8%，the limit of determination was 0.008-0.046 mg·L^-1 and the limit of quantification was 0.027-0.154 mg·L^-1.The 7 kinds of phenolic acids were all detected in L.lucidus var.hirtus rhizome and the total amount was between 5 811.01 and 11 747.23 µg·g^-1 ， the average amount was 7 421.05 µg·g^-1.The content of 7 phenolic acids was different and the rosemary acid was the highest in all the samples with an average of 7 111.19 µg·g^-1 the ratio to the total phenolic acids was 95.8%.The results of principal component analysis and cluster analysis showed that the quality of L.lucidus var.hirtus rhizome from Heze city in Shandong province was better，followed by Wanzhou district in Chongqing. Conclusion:The method was simple，sensitive，accurate，practical and reliable，and is suitable for the content determination of phenolic acid in L. lucidus var. hirtus rhizome.It is expected to provide a reference for the improvement of quality standard and a new idea for the development and utilization of L.lucidus var.hirtus rhizome.