脓毒血症患儿血浆肝素结合蛋白、降钙素原和C-反应蛋白与病情严重程度的关系

目的探讨腺毒血症患儿血装肝素结合蛋白(heparin-binding protein,HBP)、血清降甸素原(procalcitonin,PCT)和C反应蛋白(C-reactive protein,CRP)与病情严重程度的关系。方法选取2017年1月-2019年3月在西安交通大学医学院第一附属医院接受治疗的113例脓毒血症患儿为观察组,选取同期在本院体检的健康志愿者35例为对照组。根据病情程度将观察组分为脓毒症组,严重脓毒症组,感染性休克脓毒症组。根据预后情况不同分为存活组和死亡组。比较各组HBP、PCT、CRP、慢性健康状况评分Ⅱ(APACHEⅡ)、序贯器官衰竭估计评分(SOFA),并分析其与病情严重程度和预后的关系。分析HBP、PCT和CRP与APACHEⅡ、SOFA的相关性。采用受试者工作曲线(ROC)分析血浆HBP、PCT和CRP诊断膝毒血症的临床效能。结果①113例脓毒血症患儿,脓毒症34例,严重脓毒症36例,感染性休克脓毒症43例;经规范治疗后,生存82例,死亡31例。②观察组患儿入院时血浆HBP、血清PCT和CRP水平比对照组显著升高(P<0.05)。感染性休克脓毒症组患儿入院时血浆HBP、血清PCT和CRP水平最高,严重脓毒症组次之,脓毒症最低(P<0.05)。Pearson分析表明,入院时血浆HBP、血清PCT和CRP水平与脓毒血症严重程度均呈正相关(r分别为0.804、0.732、0.605,均P<0.05)。③存活组患儿入院时血浆HBP、血清PCT和CRP水平均低于死亡组(P<0.05)。Pearson分析显示:入院时血浆HBP、血清PCT和CRP水平均与预后呈正相关(r分别为0.813、0.756,、0.674,均P<0.05)。④血浆HBP、血清PCT和CRP水平与APACHEⅡ评分、SOFA评分显著相关,均呈正相关。其中血浆HBP水平与APACHEⅡ评分及SOFA评分的相关性较好(r分别为0.741和0.811,均P<0.001)。⑤入院时血浆HBP的评估脓毒血症的曲线下面积(AUC)和95%CI分别为0.885和(0.854~0.973),当截断点为27.99ng/mL时,灵敏度、特异度分别为80.4%和88.5%。血清PCT的评估脓毒血症的AUC和95%CI分别为0別5和(0.749~0.882),当截断点为0.16ng/mL时,灵敏度、特异度分别为81.9%和68.7%。血清CRP的评估脓毒血症的AUC和95%CI分别为0.731和(0.653~0.809),当截断点为2.3 mg/L时,灵敏度、特异度分别为54.3%和87.0%。结论脓毒血症患儿血浆HBP、PCT和CRP显著上升,与患儿病情严重程度和预后有关,用于早期监测和评估脓毒症患者的病情具有重要临床意义。     

Heparinized PCL/keratin mats for vascular tissue engineering scaffold with potential of catalytic nitric oxide generation

Abstract

Heparins are capable of improving blood compatibility, enhancing HUVEC viability, while inhibiting HUASMC proliferation. Combination of biodegradable poly(ε-caprolactone) (PCL) with keratin and heparins would provide an anticoagulant and endothelialization supporting environment for vascular tissue engineering. Herein, PCL and keratin were first coelectrospun and then covalently conjugated with heparins. The resulting mats were surface-characterized by ATR-FTIR, SEM, WCA, and XPS. Cell viability data showed that the heparinized PCL/keratin mats could motivate the adhesion and growth of HUVEC, while inhibit HUASMC proliferation. In addition, these mats could prolong blood clotting time and reduce platelet adhesion as well as no erythrolysis. Interestingly, these mats could catalyze the NO donor in blood to release NO, which could enhance endothelial cell growth, while decrease smooth muscle cell proliferation and platelet adhesion. In summary, the heparinized mats would be a good candidate as a scaffold for vascular tissue engineering. This study is novel in that we prepared a type of heparinized tissue scaffold that could catalyze the NO donor to release NO to regulate endothelialization without angiogenesis and thrombus formation.     

Short Communication Effect of sulfated polysaccharides on hepatocyte adhesion

The effects of sulfated polysaccharides on hepatocyte adhesion on the polystyrene dish and fibronectin-coated dish were investigated. Dextran sulfate and synthetic mannopyranan sulfate slightly inhibited hepatocyte adhesion on fibronectin-coated dish, while heparin showed no effect. On the other hand, hepatocyte adhesion on polystyrene dishes was stimulated in the presence of sulfated polysaccharides in the medium.     

Possible pro‐inflammatory role of heparin‐binding epidermal growth factor‐like growth factor in the active phase of systemic sclerosis

Heparin‐binding epidermal growth factor (EGF)‐like growth factor (HB‐EGF) is a member of the EGF family growth factors, which affects multiple aspects of the wound healing process such as epithelialization, wound contraction and angiogenesis. In our study, we measured the serum HB‐EGF levels of 51 systemic sclerosis (SSc) patients, which showed a significant increase compared with those of 20 normal subjects. Further analysis revealed a positive correlation between the HB‐EGF level and pulmonary ground‐glass score but no correlation between the former and pulmonary fibrosis score. Other findings include: a significant increase of serum sialylated carbohydrate antigen KL‐6 levels and significant shortness of disease duration in the diffuse cutaneous SSc patients with elevated HB‐EGF levels; and significantly higher HB‐EGF levels in the presence of Raynaud's phenomenon, in that of telangiectasia, and in the absence of contracture of phalanges in all SSc patients. We then evaluated HB‐EGF mRNA levels of fibroblasts harvested from skin samples of the SSc patients and those of foreskin‐derived fibroblasts treated with transforming growth factor‐β, both of which were significantly higher than each control. In conclusion, we speculate that HB‐EGF plays a pro‐inflammatory role in the active skin and lung lesions of SSc.     

注射低分子肝素致皮下出血的原因分析与护理进展（综述）

注射低分子肝素造成患者皮下出血是常见的不良反应，该文从注射前、注射时、注射后三个阶段分析了注射低分子肝素致皮下出血的相关因素，并针对相关因素提出护理改进措施，旨在降低注射所致皮下出血发生率。     

可来福接头在43例股静脉留置双腔导管血液透析中的临床观察

目的:探讨可来福无针密闭式输液接头在股静脉留置双腔导管血液透析中的应用效果。方法:将符合纳入标准的83例行股静脉留置双腔导管血液透析的患者随机分为对照组和试验组。对照组40例采用肝素帽封管,试验组43例采用可来福无针密闭式输液接头封管,观察两组的导管堵塞发生率和导管相关感染发生率。结果:观察组的导管堵塞率、导管相关感染率均低于对照组(P0.05)。结论:在股静脉留置双腔导管血透患者中使用可来福无针密闭式输液接头封管可减少导管堵塞率、降低导管相关感染率值得大力推广使用。