PurposeTo evaluate the value of combined employment of thyroid imaging-reporting and data system (TI-RADS) and ultrasound elastography (UE) in the differentiation of benign and malignant thyroid nodules.Materials and Methods The clinical data of 174 patients with 232 thyroid nodules confirmed surgically or pathologically with puncture biopsy were retrospectively analyzed. All nodules were examined by ultrasound and UE. The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of TI-RADS, UE and the combination of the two methods were calculated respectively, and the receiver operating characteristic curve (ROC) was drawn to evaluate the value of each of the three methods in differentiating benign and malignant thyroid nodules by comparison of area under curve (AUC).Results The diagnostic sensitivity, specificity and accuracy of UE (number of benign nodules: 155, number of malignant nodules: 77) were 88.9%, 91.8% and 90.9%, respectively; those of TI-RADS (number of benign nodules: 153, number of malignant nodules: 79) were 76.4%, 85.0% and 82.3%, respectively. The values measured by UE were significantly higher than those by TI-RADS (χ2=3.920 and 7.446,P<0.05). The sensitivity, specificity and accuracy measured by the combined use of the two methods (number of benign nodules: 155, number of malignant nodules: 77) were 93.0%, 93.7% and 93.5%, respectively, which were higher than either of the methods, and the difference was statistically significant (χ2=7.725, 6.450 and 13.728,P<0.05). The areas under the curve (AUC) were 0.833 and 0.812 respectively for UE and TI-RADS; the AUC for the combination of the two methods was 0.914, which had significantly higher diagnosis accuracy than that by any single method, and the difference was statistically significant (Z=1.95 and 2.55,P<0.05). Conclusion Compared with gray scale ultrasound, the combination of TI-RADS and UE has higher diagnostic sensitivity and accuracy for excluding malignancy in diagnose of thyroid nodules.

Animals ; Coronary Disease ; Diagnosis, Differential ; Disease Models, Animal ; Medicine, Chinese Traditional ; Yang Deficiency

Chemical constituents of Swertia patens. The whole plant of air-dried Swertia patens was extracted with 90% EtOH. The water extract was suspended in H₂O and extracted with petroleum ether, EtOAc and n-BuOH, successively. The compounds were isola- ted and purified by column chromatography from the EtOAc fraction, and identified based on spectral analyses (MS, ¹H-NMR, ¹³C- NMR). Eighteen compounds were isolated and elucidated as 3, 4-dihydro-1H,6H,8H-naptho [1,2-c:4,5-c', d'dipyrano-1, 8-dione (1), angelone (2), gentiogenal (3), erythricin (4), erythrocentaurin (5), gentianine (6), swertiakoside B (7), swertiamarin (8), 2'-O-actylswertiamarin (9), amarogentin (10), 1, 3, 5-trihydroxyxanthone (11), 1, 3-dihydroxy-5-methoxyxanthone (12), 1-hydroxy- 2, 3, 5-trimethoxyxanthone (13), gentiocrucine (14), 3-hydroxyphenylketone (15), n-hexacosyl ester 4-hydroxy-trans-cinnamate (16), n-hexacosyl ester 4-hydroxy-cis-cinnamate (17), and cholest-4-en-3-one (18). Compounds 1-7, 9-18 were obtained from S. patens for the first time.
Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Molecular Structure ; Spectrometry, Mass, Electrospray Ionization ; Swertia ; chemistry

This present work is to study the chemical constituents of Swertia angustifolia. The whole plants of air-dried Swertia angustifolia was extracted with 90% EtOH. The water extract was suspended in H2O and extracted with petroleum ether, EtOAc and nBuOH, successively. The compounds were isolated and purified by column chromatography from the EtOAc fraction, and identified based on spectral analyses (MS, 1H-NMR, 13C-NMR). Fourteen compounds were isolated and characterized as 1, 8-dihydroxy-3, 7-dimethoxyxanthone (1), 1, 8-dihydroxy-3, 5, 7-trimethoxyxanthone (2), 7-hydroxy-3, 8-dimethoxyxanthone-1-O-β-D-glucopyranoside (3), 8-0-[β-D-xylopyranosyl-(1-6) -β-D-glucopyranosyl] -1, 7-dihydroxy-3-methoxyxanthone (4), (+) -syringaresinol (5), ferulic acid (6), trans-coniferyl aldehyde (7), sinapaldehyde (8), trans-coniferyl alcohol (9), 3, 4-dihydroxybenzoic acid (10), 2-hydroxybenzoic acid (11), isophthalic acid (12), 2-furoic acid (13), and 2-methyl-4(3H)-quinazolinone(14). Compounds 2-14 were obtained from this plant for the first time.
Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Mass Spectrometry ; Molecular Structure ; Swertia ; chemistry

This study is to investigate the chemical constituents of Swertia kouitchensis. The whole plants of air-dried Swertia kouitchensis was extracted with 90% EtOH. The water extract was suspended in H2O and extracted with petroleum ether, EtOAc and n-BuOH, successively. The compounds were isolated and purified by column chromatography from the EtOAc fraction, and their structures were identified based on spectral analyses (MS, 1H-NMR, 13C-NMR). Twenty-eight compounds were obtained, and characterized as erythrocentaurin (1), erythrocentaurin dimethylacetal (2), swertiamarin (3), vogeloside (4), 2'-O- actylswertiamarin (5), swertianoside D (6), gentiocrucines A-B (7-8), gentiocrucine (9), 1-hydroxy-3, 7, 8-trimethoxyxanthone (10), 1-hydroxy-3, 5, 6-trimethoxyxanthone (11), 3-epitaraxerol (12), erythrodiol 3-O-palmitate (13), (+) -syringaresinol (14), caffeic acid (15), trans-coniferyl aldehyde (16), trans-coniferyl alcohol (17), 3, 4-dihydroxybenzoic acid (18), 4-hydroxy-3-methoxybenzoic acid (19), 3, 4-dihydroxybenzoic aldehyde (20), 2, 3-dihydroxybenzoic acid (21), 4-hydroxybenzoic acid (22), 3-acetoxybenzoic acid (23), 3-hydroxybenzoic acid (24), 3-hydroxybenzoic alcohol (25), nicotinic acid (26), 2-furoic acid (27), and uracil (28). Compounds 1-4, 6-28 were obtained from S. kouitchensis for the first time.
Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Molecular Structure ; Swertia ; chemistry

The characteristics of the elderly patients with fragility fracture were analyzed, the concept of orthogeriatrics care was expounded, and the research progress of the care mode of the elderly patients with fragility fracture were summarized, so as to provide reference for the clinical practice of the elderly orthopedic department and the training of specialized nurses in China.

Adult ; Aged ; Bone Nails ; Female ; Femoral Fractures ; surgery ; Femur ; surgery ; Fracture Fixation, Intramedullary ; Fractures, Comminuted ; surgery ; Humans ; Internal Fixators ; Male ; Middle Aged

ObjectiveAnalyzing the left atrium and pulmonary vein morphologicallv by 64 multislice spiral CT(MSCT)scan to guide the catheter ablation of Atrial fibrillation.MethodsTwo hundred and thirty-two patients(146 cases in atrial fibrillation group and 86 cases in control group)received 64 MSCT examination of the left atrium and pulmonary vein.The incidence of anatomical variation of pulmonary vein was compared between atrial fibrillation group and control group. For each group,the anatomical morphology ot every pulmonary vein and the auricle of left atrium was analyzed, the diameter of the orifice of each pulmonary vein and the size of left atrium were measured.ResultsSixty-four MSCT of left atrium and pulmonary vein could demonstrate detailed connecting type between left atrium and pulmonary Veins and the possible anatomieal variation. Anatomical variation of pulmonary vein in this study accounted for 16.8% (39/232)of total sample. For both groups,orifices of pulmonary veins appeared oval and their superoinferior diameters were larger than their anteroposterior diameters. There was significant difference in the inner diameter of left atrium between atrial fibrillation group and control group[atrial fibrillation group:(39.47±8.98)mm,control group:(36.94 ±5.49)mm,P=0.02],while there was no difference in the diameters of orifices ot puhnonary veins between two groups [ superoinferior diameters of pulmonary veins in atrial fibrillation group:left-up(18.15±1.35)mm,left-down(16.96 ±1.18)mm,right-up(17.50±

Reverse-genetic engineering of foot and mouth disease virus (FMDV) can improve the productivity, antigen matching, antigen stability, immune response ability, and biological safety of vaccines, so vaccine candidates with anticipated biological characteristics can be promptly achieved. Negative influence in taming of virulent strains can also be decreased or avoided. Reverse genetics not only make up for deficiencies like limitation of viral nature, low success rate, and time and energy consuming, but also realize more active designing of vaccines. Therefore, reverse genetics is significant in improving integral quality and efficiency of vaccines. In this review, we use FMDV vaccines as an example to summarize improvement in biological characteristics of virulent strains and provide a reference for related researches.
Animals ; Antibodies, Viral ; immunology ; Foot-and-Mouth Disease ; immunology ; prevention & control ; virology ; Foot-and-Mouth Disease Virus ; genetics ; immunology ; Reverse Genetics ; Viral Vaccines ; genetics ; immunology

Aged ; Carcinoma, Small Cell ; genetics ; Case-Control Studies ; Cytochrome P-450 CYP2E1 ; genetics ; Female ; Humans ; Lung Neoplasms ; genetics ; Male ; Middle Aged ; Polymorphism, Single Nucleotide