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Objective:To evaluate the reliability and validity of Chinese version of Minnesota Living with Heart Failure Questionnaire (MLHFQ) scale among patients with chronic Keshan disease.Methods:The patients with chronic Keshan disease diagnosed in Keshan disease area of Gansu Province from August 2018 to April 2020 were selected as the survey subjects to analyze the reliability and validity of the Chinese version of MLHFQ scale in evaluating the quality of life of patients with chronic Keshan disease. To evaluate the reliability of MLHFQ scale, the Cronbach's α coefficient was used, and when the Cronbach's α coefficient > 0.8 indicated that the consistency reliability of the scale was good. Kaider-Meyer-Olkin(KMO) statistic and Barlett's sphericity test were used to evaluate whether the scale was suitable for factor analysis (applicable when KMO > 0.6 and Barlett's sphericity test P < 0.05). The principal component analysis and maximum variance method of exploratory factor analysis were used to extract common factors, and the structural validity of the scale was evaluated. The discrimination validity of the scale was evaluated by New York Heart Association (NYHA) cardiac function classification and analysis of variance. Pearson correlation analysis was used to evaluate the content validity of the scale. Results:A total of 333 questionnaires were collected, of which 329 were valid. There were 180 males and 149 females, aged (59.52 ± 9.26) years. The Cronbach's α coefficient of the Chinese version of MLHFQ scale was 0.95 ( > 0.8). Among them, the Cronbach's α coefficients in the physical domain, emotional domain and other domains were 0.93, 0.91 and 0.86, respectively ( > 0.8). The KMO value of the Chinese version of MLHFQ scale was 0.95 ( > 0.6), and Barlett's sphericity test rejected the hypothesis (χ 2 = 5 222.01, P < 0.05). Principal component analysis and maximum variance method were used to extract 3 common factors, which were named kinetic energy of life, physical condition and emotional condition, respectively. The cumulative contribution rate of principal components was 66.22% ( > 50%). Compared with patients with NYHA cardiac function grade Ⅱ and patients with grade Ⅲ and Ⅳ, there were significant differences in the physical domain, other domain and total score ( P < 0.001). The Pearson correlation coefficients between the physical, emotional, and other domains and their respective items ranged from 0.74 to 0.88, 0.78 to 0.90, and 0.56 to 0.80, respectively, and the correlation coefficients between each item and its domain were all > 0.5 ( P < 0.001). Conclusion:The Chinese version of MLHFQ scale has good reliability and validity in patients with chronic Keshan disease in Gansu Province, and can be used to evaluate the quality of life of patients with chronic Keshan disease.
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Objective:By investigating the cognitive level and influencing factors of heart failure knowledge in patients with chronic Keshan disease, so as to provide reference for improving the cognitive level of disease-related knowledge of the patients with Keshan disease in the targeted manner.Methods:In 2019, 100 patients with chronic Keshan disease were selected in Jingchuan County, Gansu Province. A questionnaire survey was conducted using the heart failure knowledge questionnaire to conduct correlation and regression analysis on the cognitive level of patients' heart failure knowledge and influencing factors.Results:Patients' average score of the heart failure knowledge level was (6.18 ± 2.72) points, and the scoring accuracy rate was 41.20%. The Spearman correlation analysis indicated that heart failure knowledge level was associated with annual family income ( r = 0.363, P < 0.01), the hospitalization times due to heart failure ( r = 0.304, P < 0.01), and the number of family members ( r = 0.240, P < 0.05). The results of multiple linear regression showed that the cognitive level of heart failure knowledge in male patients was higher than that in female patients ( P < 0.05). The more hospitalization times ( P < 0.05) and the more family members ( P < 0.05) were, the higher the cognitive level of heart failure knowledge was. Conclusions:The cognitive level of heart failure knowledge of patients with chronic Keshan disease is generally low. Medical staff should actively make use of the patient's hospitalization time for health education, and pay attention to the health education of family members of the patients.
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Anultra-performancehydrophilicinteractionliquidchromatography-triplequadrupolemass spectrometric ( UPLC-MS/MS) method was developed for the determination of tetrodotoxin ( TTX) in human urine and plasma. After the sample was cleaned-up and concentrated by immunoaffinity column, the separation of the TTX was carried out on an Acquity UPLC BEH amide column (100 mm×2. 1 mm, 1. 7 μm) with gradient elution using mobile phases of 0. 1% ( V/V) formic acid in water and acetonitrile. The analyte was detected by positive electrospray ionization mass spectrometry in the multiple reaction monitoring ( MRM) mode, and quantified by external solvent standard calibration. The measuring ranges of TTX in urine and plasma were 0. 05-400 μg/L. The average recoveries were 92%-95% and 91%-96% for TTX respectively spiked in urine and plasma with relative standard deviations of 3 . 3%-7 . 2% and 3 . 9%-7 . 8% ( n=5 ) . The limits of detection (LOD, S/N=3) and limits of quantitation (LOQ, S/N=10) of TTX were 0. 02 μg/L and 0. 05μg/L for urine and plasma, respectively. This method is suitable for the detection of TTX in urine and plasma for both forensic and clinical purposes.
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Background and purpose: Metastatic carcinoma and lymphoma are usually the causes of cervical malignant lymph nodes. This paper was aimed to investigate the different appearances of cervical malignant lymph nodes by 2 dimension and color doppler flow imaging (CDFI) and discuss the role of ultrasenography in diagnosing cervical malignant lymph nodes. Methods: Ninety-nine patients and 40 healthy people were selected as our subjects, among which 54 cases were diagnased as metastatic tumor and 45 cases as lymphoma according to pathology examination. With high frequency transducers, ultrasonography was used to document the shape of cervical lymph nodes, the ratio of long/short axis (L/S), types of echo and hilus of lymph node. CDFI features were also recorded and measured in order to analyze the parameters. Results: Compared with image of normal lymph nodes, the image of cervical malignant lymph nodes showed that the shape tended to be round and the ratio of L/S decreased. In addition, the majority of echo types of malignant lymph nodes was a low level echo and easily became fused. Meanwhile, the image of hilus of lymph node tended to disappear or shift. The lymph node of cases with metastatic tumor was shown to be either calcified or liquefied. The rate of blood flow in the artery was observed to be of high velocity and high resistive index (RI). Between metastatic tumor and lymphoma tumor case, there was significant difference in terms of ultrasonographic and CDFI features. All the above results showed that the features of malignant lymph nodes were significantly different from the normal ones. Conclusion: Ultrasonography could be regarded as one method of evaluating cervical malignant lymph nodes.