HPLC荧光法测定血浆替米沙坦浓度

目的:建立高效液相-荧光检测法测定血浆替米沙坦浓度.方法:采用Symmetry C18柱,流动相:0.05 mol·L-1磷酸二氢钾溶液(用1 mol·L-1磷酸溶液调节pH=3.65):乙腈=55:45,激发波长:300nm;发射波长:385 nm.结果:线性回归方程y=0.055 80C-0.001 45,r=0.999 8;线性范围为1.0～500.0 μg·L-1,最低检测限为1 tμg·L-1.低、中、高三种浓度的绝对回收率分别为77.6%,94.97%和97.66%,相对回收率为96.62%,98.46%和104.43%,日内,日间RSD均小于10%.结论:该法操作简便,精密度高,可满足生物利用度试验方法学的要求.     

卟啉及其类似物在HPLC固定相中的应用

介绍了卟啉及其类似物衍生固定相的特征和制法,综述了这类固定相在HPLC中的应用和分离机制.     

阿米洛利的神经保护作用

阿米洛利是一种上皮细胞钠离子通道(ENaC)阻滞药,作为一种保钾利尿药已在临床应用了数十年.研究表明,中枢神经系统的多种离子通道对阿米洛利敏感,如酸敏感离子通道(ASIC)、Na+/H+交换泵等.这些通道具有重要的生理功能,而且还可能参与了脑缺血、组织酸中毒等病理学过程.阿米洛利通过阻滞这些通道,呈现出减轻缺血和酸化介导的神经元损伤等效应,很有可能成为治疗脑缺血等的新型神经保护剂.     

A novel robust nomogram based on peripheral monocyte counts for predicting lymph node metastasis of prostate cancer

Accurate methods for identifying pelvic lymph node metastasis(LNM)of prostate cancer(PCa)prior to surgery are still lacking.We aimed to investigate the predicti...     

符合临床要求的烤瓷镍铬合金镀金技术最佳工艺参数的研究

目的:探索符合临床要求的烤瓷镍铬合金最佳镀金工艺参数。方法:根据不同参数组合将试件分为8组,每组8片,其中6片用显微观测划痕法测量镀金层的临界载荷,并用扫描电镜观察镀层截面的质地和厚度,剩余2片用牙刷磨耗试验法测试镀金层的耐磨性能。综合评价后得出符合临床要求的最佳工艺参数。结果:镀金层的临界载荷随镀金时间的增加先增大再减小;镀金电压为0.9V时随着镀金时间的增加,镀金层致密性明显增加而厚度增加不明显,镀金电压为1.0V时随着镀金时间的增加镀金层的致密性和厚度均有明显增加;参数为1.0V360s时镀金层耐磨性能最佳。结论:1.0V360s是符合临床要求的烤瓷镍铬合金镀金技术最佳工艺参数。     

Vitamin D Status Presents Different Relationships with Severity in Metabolic-Associated Fatty Liver Disease Patients with or without Hepatitis B Infection

Whether the associations between serum vitamin D (VitD) and metabolic-associated fatty liver disease (MAFLD) vary with chronic hepatitis B (CHB) infection has not been well established. This study aims to investigate the relationships between serum VitD and metabolism, liver fat content (LFC) and fibrosis among MAFLD patients with and without CHB. Consecutive subjects (healthy controls: 360, CHB: 684, MAFLD: 521, CHB with MAFLD: 206) were prospectively enrolled between January 2015 and December 2021. Anthropometric, laboratory, imaging, and histological evaluations were conducted, with LFC measured via magnetic resonance imaging-based proton density fat fraction (MRI-PDFF). Serum VitD levels were lower in MAFLD patients than in healthy controls and patients with CHB alone or overlapping with MAFLD (24.4 ± 8.1 vs. 29.0 ± 9.5 vs. 27.4 ± 9.6 vs. 26.8 ± 8.4 ng/mL respectively; p < 0.001 in one-way ANOVA test). After adjusting for confounding factors, including season, hypersensitive C-reactive protein, insulin resistance, liver stiffness measurements, sun exposure, exercise and dietary intake, multivariate linear regression analysis revealed that VitD remained significantly negatively correlated with LFC in MAFLD patients (β = −0.38, p < 0.001), but not in CHB with MAFLD patients. Moreover, quantile regression models also demonstrated that lower VitD tertiles were inversely associated with the risk of insulin resistance and moderate–severe steatosis in the MAFLD group (p for trend <0.05) but not in the MAFLD with CHB group. VitD deficiency was associated with the severity of metabolic abnormalities and steatosis independent of lifestyle factors in MAFLD-alone subjects but not in MAFLD with CHB subjects.     

Supplement to the published paper "Theory-guided interventions for Chinese patients to adapt to heart failure:A quasi-experimental study"

We appreciate the question raised in a discussion with a reader and the editor about an instrument for outcome measure of the quality of life among people with ...     

经皮氩氦刀治疗结直肠癌肝转移31例临床分析

目的 评价B超引导经皮氩氦刀治疗结直肠癌肝转移的疗效.方法 CRYO-HITTM氩氦刀低温冷冻治疗系统治疗结直肠癌肝转移31例共55个病灶.随访观察病灶影像形态表现、血清CEA变化和患者生存率.结果 氩氦刀治疗后反应期2～5 d,包括局部疼痛不适、发热、ALT升高等;小肿瘤(＜3.0 cm)完全坏死率达92.9%(26/28),3.1～5.0 cm的肿瘤完全坏死率为73.3%(11/15),病灶＞5 cm者均未完全坏死;1、2、3年生存率分别为87.1%、77.5%和54.8%.结论 氩氦刀是治疗结直肠癌肝转移的一种微创疗法,对较小病灶疗效显著.