经鼻高流量氧气湿化治疗老年慢性阻塞性肺疾病急性加重合并呼吸衰竭的可行性研究

ObjectiveTo investigate the feasibility of transnasal heated humidified high flow nasal cannula oxygen therapy (HFNC) in the treatment of acute exacerbation of chronic obstructive pulmonary disease (AECOPD) with respiratory failure in elderly patients. MethodsA total of 176 elderly patients with AECOPD complicated with respiratory failure who were hospitalized at Peking University Shougang Hospital from December 2016 to January 2022 were enrolled, including 82 patients in an HFNC group and 94 patients in an NPPV group. After treatment, pulse oxygen saturation (SPO₂), arterial partial pressure of carbon dioxide (PaCO₂), oxygenation index (OI), respiratory rate (RR), heart rate (HR), mean arterial pressure (MAP), comfort score, discharge rate, rate of endotracheal intubation, rate of transfer to intensive care unit (ICU), and mortality were compared between the two groups. The independent sample t-test was used for comparison between the two groups. Statistical data are expressed in percentage or number of cases and the χ² test was used for their comparisons. ResultsThe SPO₂ values at 30 min, 1 h, and 6 h were significantly higher in the HFNC group than in the NPPV group (t=-2.049,-2.618, and -3.314, P=0.043, 0.010, and 0.001, respectively). SPO₂ before discharge was significantly lower than that of the NPPV group (t=2.162, P=0.033), but OI at each time point and before discharge had no statistical significance (P＞0.05). MAP at 6 h was significantly higher in the HFNC group than in the NPPV group (t=-2.209, P=0.029), but within the normal range. HRs at 2 h and 3 h in the HFNC group were significantly higher than those of the NPPV group (t=-2.199 and -2.336, P=0.030 and 0.021, respectively). There were no significant differences in RR, HR, or MAP between the two groups at other time points and before discharge (P＞0.05). There was no significant difference in PaCO2 between the two groups (P＞0.05). Comfort score in the HFNC group was significantly higher than that of the NPPV group (t=-46.807, P＜0.001). There were no significant differences in discharge rate, ICU transfer rate, endotracheal intubation rate, and mortality between the two groups (P＞0.05). ConclusionHFNC is as effective as NPPV in treating elderly patients with AECOPD complicated with type Ⅰ or mild type Ⅱ respiratory failure, and HFNC is more comfortable than NPPV.     

In silico screening and analysis of single-nucleotide polymorphic variants of the ABCC2 gene affecting Dubin–Johnson syndrome

Background and Study AimsDubin–Johnson syndrome (DJS) is a benevolent genetic disorder of the liver with autosomal inheritance. It is a rare disorder characterized by an increase in conjugated bilirubin and anomaly in coproporphyrin clearance. DJS is caused by deleterious mutations in the ABCC2 gene. A polymorphism in the ABCC2 gene causes malfunctions in its ability to regulate the efflux of different organic anions, such as bilirubin, from hepatocytes to the canaliculi. Multidrug resistance protein 2 (MRP2) encoded by the ABCC2 gene is one of the main regulators of the export of bilirubin to respective sites. ABCC2 gene mutations have widely drawn attention in the pathology of DJS in various populations.Patients and MethodsThe ABCC2 gene was subjected to the National Center for Biotechnology Information (NCBI) database in 2020, and non-synonymous single-nucleotide polymorphisms (nsSNPs) and variants in untranslated regions were studied using different computational servers. SIFT, Protein variation effect analyzer, and PolyPhen-2 were used to retrieve the damaging Single-nucleotide polymorphisms (SNPs); PhD-SNP, SNPs&GO, and Protein Analysis Through Evolutionary Relationships were used to predict the association of nsSNPs with DJS; Mutation3D illustrated the location of variants in the protein; SNAP2, MutPred2, ELASPIC, and HOPE were used to predict the structural and functional effects of these mutations on MRP2; and I-mutant 3.0 and MuPro were used to determine the effects of polymorphism on the function of MRP2.ResultsIn this study, 18,947 SNPs were screened from the NCBI database, followed by a series of refinement of variants using online available servers. We concluded that 41 ABCC2 gene variants are vital etiological candidates for DJS in humans. These 41 variants had highly damaging effects on the MRP2 protein, which may lead to deficient transportation capacity, thereby affecting the efflux of bilirubin across the canalicular membrane.ConclusionIn silico tools are an alternative approach for predicting the target SNPs. Hence, previously unreported variants can be considered strong etiological candidates for diseases related to MRP2.     

2例胰岛素自身免疫综合征临床病例分析

通过回顾分析我院2例确诊为胰岛素自身免疫综合征(IAS)患者的临床资料,并复习相关文献,总结发病机制及治疗方法,探讨IAS患者的临床特点,提高对低血糖症的诊治水平。     

基于贵州省人群队列的代谢综合征发病风险和影响因素分析

目的 探讨代谢综合征（MS）的发病风险和影响因素，为预防MS提供科学依据。方法 采取多阶段整群抽样方法，于2010年建立贵州省人群队列，排除基线MS患者后，共有7 136人进入MS随访队列，收集队列人群基线社会人口学信息、生活行为方式和生理指标，并于2016—2020年进行随访，最终纳入4 754人进行分析。采用COX比例风险模型分析MS的发病风险及其影响因素的HR（95% CI），并计算影响因素的人群归因危险度（PAF%）。同时根据基线人群的MS组分得分建立亚队列，分析亚队列人群MS的影响因素。结果 队列人群累计随访33 424.18人年，中位随访6.57年，新发MS 963人，MS发病密度为28.81/1 000人年。COX回归分析结果显示:年龄45～59岁（HR = 1.53，95%CI:1.32～1.77）、年龄≥60岁（HR = 1.53，95%CI:1.27～1.86）、城市（HR = 1.71，95%CI:1.47～1.99）、吸烟（HR = 1.22，95%CI:1.01～1.48）、每日油摄入＞30 g（HR = 1.16，95%CI:1.01～1.34）、每日盐摄＞6 g（HR = 1.22，95%CI:1.05～1.42）、静态时间≥4 h/d（HR = 1.16，95%CI:1.02～1.32）、超重（HR = 1.66，95%CI:1.44～1.92）、肥胖（HR = 2.27，95%CI:1.71～3.02）、静息心率70～80次/min（HR = 1.32，95%CI:1.11～1.58）和 ＞80次/min（HR = 1.28，95%CI:1.07～1.54)是MS的危险因素，其PAF%分别为17.47%、11.32%、19.52%、5.89%、11.33%、13.66%、7.01%、12.91%、5.30%、17.68%、13.92%，文化程度升高（HR = 0.75，95%CI:0.68～0.83）和饮茶行为（HR = 0.82，95%CI:0.71～0.95）是MS的保护因素，其PAF%分别为16.21%和6.97%。亚队列研究结果与总体结果相似。结论 不健康的生活方式和超重、肥胖、静息心率升高是MS的影响因素，应将中老年人和城市居民作为预防MS的重点人群，采取相应措施控制烟草消费、油盐摄入，维持正常体重和适当心率，提高人群知识水平，保持饮茶行为，预防MS发生。     

Out of the boxes,out of the silos: The need of interdisciplinary collaboration to reduce poor-quality medical products in the supply chain

In this paper, we argue that understanding and addressing the problem of poor-quality medical products requires a more interdisciplinary approach than has been evident to date. While prospective studies based on rigorous standardized methodologies are the gold standard for measuring the prevalence of poor-quality medical products and understanding their distribution nationally and internationally, they should be complemented by social science research to unpack the complex set of social, economic, and governance factors that underlie these patterns. In the following sections, we discuss specific examples of prospective quality surveys and of social science studies, highlighting the value of cross-sector partnerships in driving high-quality, policy-relevant research in this area.     

When Fryn met Edward: Two rare syndromes in a single patient

A neonate born at our centre was diagnosed as Fryns Syndrome ie congenital diaphragmatic hernia with facial dysmorphism and distal limb anomalies, which is a rare disorder with only a few hundred cases reported till date.With high clinical index of suspicion and further evaluation, the diagnosis was confirmed. The baby was initially stabilized and later underwent repair of the diaphragmatic hernia. Despite best measures, the baby could not be salvaged. When severe, this can be lethal and diagnosis can only be made after autopsy. However, with early suspicion, better modalities of investigations available and improved NICU care, these babies can be salvaged. We report a case of Fryns Syndrome who was incidentally found to have Edward Syndrome as well. Such an extremely rare combination is yet to be reported in medical literature.Also with updated genetic studies, better diagnostics and treatment options coming up in future, there are chances to improve the survivability of these babies. It is prudent to document all such cases to aid in better understanding of the disease process.     

特纳综合征患者骨质疏松的研究进展

特纳综合征(TS)是女性常见的性染色体异常疾病,与多种疾病共存。越来越多的证据表明TS患者有较高的骨质疏松患病率,本文就近年来TS中骨质疏松的危险因素及管理治疗的相关研究进展做一综述。