目的：观察卡介菌多糖核酸联合润燥止痒胶囊治疗慢性荨麻疹的疗效。方法： 将2008年4月~2009年4月门诊就诊的86例慢性荨麻疹患者随机分成两组，治疗组44例采用卡介菌多糖核酸2 mL肌注，隔日1次，18次为1疗程；同时予口服润燥止痒胶囊4粒，3次/d，连续治疗36天；对照组42例单独口服润燥止痒胶囊，方法疗程同治疗组。结果： 治疗组有效率为90.91%,对照组为7143%。两组比较差异有显著性（Plt;005）。结论： 卡介菌多糖核酸联合润燥止痒胶囊治疗慢性荨麻疹疗效确切。
为预防应激性溃疡和消化道出血, 质子泵抑制剂( PPI) 、组胺H2 受体拮抗剂( H2 RA) 以及硫糖铝在ICU中的应用非常普遍。既往的研究认为以PPI 或H2RA 为代表的抑酸剂( ASD) 可致胃液pH 值增高, 为细菌在胃腔内定植创造了条件, 并进而增加医院获得性肺炎( HAP) , 尤其是呼吸机相关性肺炎( VAP) 发生的风险。我们通过文献复习发现,ASD 与VAP 的关联性迄今仍无明确的证据, 已有的临床研究结论互为矛盾; 另一方面, 既往研究多集中于硫糖铝与H2RA 的比较, 有关PPI 和H2RA 导致VAP 的风险比较研究仍然缺乏, PPI 是否比H2 RA 更易发生VAP 也缺乏研究可资证明。为此我们将有关内容综述如下, 以供同道参考。
“拯救脓毒症运动（Surviving Sepsis Campaign，SSC）”是国际危重病医学界为提高脓毒症诊治水平、降低病死率而于2002年发起的全球性运动。随后，由多个国际学术组织暨国际专家组发起与组编的《严重脓毒症与脓毒症休克治疗指南》[1]及其修订版[2]（以下统称为“SSC指南”）分别于2004年和2008年颁布。指南以循证医学为依据，总结了早期目标指导治疗（EGDT）、强化血糖控制（TGC）、小剂量激素替代治疗、活性蛋白C（APC）治疗等治疗方案，其核心就是将各自独立的疗法整合为整体化的“集束化治疗策略（Bundle Strategy）”，以期最大限度地发挥综合治疗效应[3]。按照SSC的建议，集束化治疗策略包括脓毒症复苏集束化策略（Sepsis Resuscitation Bundle）和脓毒症治疗集束化策略（Sepsis Management Bundle）。前者要求在诊断严重脓毒症后的6 h内完成血乳酸测定、血培养、早期广谱抗菌药物应用和EGDT等6项治疗策略；后者则要求在24 h内完成由小剂量激素、APC、TGC和限制气道平台压构成的4项治疗策略[4]。显然，上述策略借鉴了创伤救治的“黄金6小时”和“白银24小时”的理念。 目前已有越来越多的研究证据支持集束化治疗策略在急诊和ICU的早期实施，并显示出病死率降低的趋势。但实际的情况是临床上对该策略的实施与执行严重不足，集束化治疗策略所代表的强化、优先、积极的治疗理念并未获得普遍的贯彻，进而影响到获得病死率显著降低的收益。另一方面，集束化治疗策略的各治疗要素也非完美，其所依据的相关临床试验存在着诸多不足甚至可疑之处，而单纯的疗法叠加是否真能发挥事半功倍的效果也值得考量。为此，本文就当前国际上的相关研究进展进行反思，以供同道参考。
ObjectiveTo explore the correlation between the texture features of gastric cancer plain CT images and the expression of HER2.MethodsA retrospective collection the datas of 62 patients with gastric cancer who underwent CT scans of the upper abdomen and (or) the whole abdomen from January 2017 to January 2021 in Leshan City People’s Hospital. The treatment method was surgery. The HER2 expression of gastric cancer tissue was detected after the operation. There were 45 male patients and 17 female patients. Lauren classification: 18 cases of intestinal type, 30 cases of diffuse type, and 14 cases of mixed type. Fifty-two cases were HER2 expression negative [age: (63.54±10.32) years], and 10 cases were HER2 expression positive [age: (61.70±11.70) years]. The MaZda module in the MaZda 4.6 version software was used to perform the image normalization, interest area delineation, texture feature extraction, and texture feature selection on the CT plain scan image, and perform texture feature discrimination and misjudgment rate analysis in the B11 module.ResultsThere was no correlation between HER2 expression and age, gender of patients and Lauren classification of tumors (P>0.05). The analysis methods of nonlinear discriminant analysis (NDA)/artificial neural network (ANN), linear discriminant analysis (LDA)/1-nearest-neighbor (1-NN), principal component analysis (PCA)/1-NN, and raw-data analysis (RDA)/1-NN can better correspond to the CT plain scan texture feature parameters of gastric cancer and the expression level of HER2.ConclusionsTexture analysis based on CT plain images has the potential to non-invasively detect the HER2 expression in gastric cancer. The best comprehensive performance texture discrimination method is NDA/ANN and LDA/1-NN.
The freeze-drying is a technology that preserves biological samples in a dry state, which is beneficial for storage, transportation, and cost saving. In this study, the bovine pericardium was treated with a freeze-drying protectant composed of polyethylene glycol (PEG) and trehalose (Tre), and then freeze-dried. The results demonstrated that the mechanical properties of the pericardium treated with PEG + 10% w/v Tre were superior to those of the pericardium fixed with glutaraldehyde (GA). The wet state water content of the rehydrated pericardium, determined using the Karl Fischer method, was (74.81 ± 1.44)%, which was comparable to that of the GA-fixed pericardium. The dry state water content was significantly reduced to (8.64 ± 1.52)%, indicating effective dehydration during the freeze-drying process. Differential scanning calorimetry (DSC) testing revealed that the thermal shrinkage temperature of the pericardium was (84.96 ± 0.49) ℃, higher than that of the GA-fixed pericardium (83.14 ± 0.11) ℃, indicating greater thermal stability. Fourier transform infrared spectroscopy (FTIR) results showed no damage to the protein structure during freeze-drying. Hematoxylin and eosin (HE) staining demonstrated that the freeze-drying process reduced pore formation, prevented ice crystal growth, and resulted in a tighter arrangement of tissue fibers. The frozen-dried bovine pericardium was subjected to tests for cell viability and hemolysis rate. The results revealed a cell proliferation rate of (77.87 ± 0.49)%, corresponding to a toxicity grade of 1. Additionally, the hemolysis rate was (0.17 ± 0.02)%, which is below the standard of 5%. These findings indicated that the frozen-dried bovine pericardium exhibited satisfactory performance in terms of cytotoxicity and hemolysis, thus meeting the relevant standards. In summary, the performance of the bovine pericardium treated with PEG + 10% w/v Tre and subjected to freeze-drying could meet the required standards.
There are already many ion detection methods available, and their development in long-term application practice has become very mature, which can achieve high-precision monitoring of different ion types and ion concentrations. However, in order to meet the requirements of modern smart healthcare, portable ion continuous monitoring methods with good portability, low operational difficulty, and high detection efficiency urgently need to be developed. However, existing detection methods are far from meeting the requirements of real-time and long-term health monitoring due to factors such as detection principles. In recent years, breakthroughs have been made in miniaturized and portable ion continuous monitoring technology, among which high-sensitivity and high-specificity miniature ion sensing components and miniaturized low-power driving measurement circuits have become the main research contents of this technology. This article starts with high-performance ion sensors in the front-end and high-level integrated driving measurement circuits in the back-end, summarizes the current development of miniaturized and portable ion continuous monitoring technology, reviews its applications, and looks forward to the possible development directions of portable ion monitoring technology in the future.
Objective To explore a new method of treating early avascular necrosis of femoral head (AVNFH). Methods Sixty-nine New Zealand adult rabbitswith a mean weight of 2.8 kg after AVNFH presenting were randomly divided into three groups. In group A, deproteinized bone(DPB) combined with the recombinant plasmid pcDNA3.1/vascular endothelial growth factor 165(VEGF165) was implanted in the drilled channel of the necrotic femoral head. In group B, only DPB was implanted. In group C, channel was drilled without DPB or plasmid implanted. Femoral head specimens were obtained 3 days, 1, 2, 4, 8 and 16 weeks after operation. The expression of VEGF165 was examined by RT-PCR, Western blot and immunohistochemical techniques. X-ray testedbone formation generally. Angiogenesis and repair of the femoral head were observed by histological and histomorphometric analysis. Results In group A, the expressions of VEGF165 mRNA and protein were detected 3 days postoperatively, reached apex 1 week and lasted more than 3 weeks after implantation. The ratios of IOD of collagen type Ⅰ were 0.29±0.11, 0.55±0.13 and 0.67±0.10 IOD/μm2 respectively at 2, 4 and 8 weeks postoperatively and the ratios of IOD of new capillary vessels were 0.33±0.10and 0.57±0.16 IOD/μm2 respectively at 2, 4 weeks postoperatively in group A, showing statistically significant difference (Plt;0.01) when compared with groups B and D. X-ray test indicated much bone callus formed early. Conclusion Transfection of the VEGF165 gene can enhance local angiogenesis at early stage andDPBVEGF165 compound can improve bone formation. Deproteinized bone combined with VEGF165 gene provides a potential method for therapy of osteonecrosis.