PICC置管及相关粘胶材料对皮肤损伤的护理干预效果比较研究

针对输液置管粘胶材料很容易导致患者相关皮肤损伤的问题,对PICC置管术粘胶材料对皮肤损伤的护理方法和干预效果进行研究。结果表明:采用优质皮肤护理,化疗输液置管粘贴部位发生粘胶皮肤损伤的几率、严重程度均明显下降,首次发生损伤的时间也有所延迟,应用风险评估干预可将置管部位皮肤护理控制由被动变主动,有效预防粘胶皮肤损伤的发生,有助于促进患者术后恢复效果和术后满意度。

医用护理中的抗菌粘胶材料制备及应用效果探讨

针对传统医用护理粘胶材料没有载药和抗菌性能的问题,提出一种新型蕲艾精油微胶囊粘胶材料的制备,并对其性能进行研究。试验结果表明,在聚乙烯醇(PVA)质量分数为1%,跨膜压力为20 kPa的乳化条件下,制备的微胶囊粒径为5.2μm,表面平整光滑,粒径分布均匀。以该微胶囊为原料制备的蕲艾精油粘胶纤维,载油率为25.7%,在36 h强制释放条件下,释放率约为29%,在大肠杆菌和金黄色葡萄球菌均中的抑菌带宽度分别为1.72 mm和8.31 mm时,缓释效果和抑菌效果良好,满足GB/T 20944.1-2007的规定要求。

粘贴钢板法在桥梁加固工程中的应用

结合工程实例,介绍了粘贴钢板法在桥梁加固中的设计方案,并对其钢板加固、桥面补强加固、裂缝修补等方面的施工要点进行了阐述,总结了施工中应注意的一些问题,以推广该法在桥梁加固工程中的应用。

The Clinical Study of Healon 5 in Phacoemulsification and IOL Implantation

Purpose: To compare a new ophthalmic viscoelastic device (OVD) Healon 5 with twoother kinds of OVDs commonly used in China during phacoemulsification and intraocularlens (IOL) implantation in terms of removal time, intraocular pressure, corneal andanterior chamber response.Methods: This prospective randomized study, in which patients and observers aremasked, comprises niety eyes. They were randomly divided into 3 groups with differentOVDs. Healon 5 (sodium hyaluronate 5 000 2.3 % ) was compared with Healon GV(sodium hyaluronate 7 000 1.4 % ) and Iviz (sodium hyaluronate 1.0 % ) . Thesurgeries were performed with temporal corneal incision, phacoemulsification in situ andfoldable lens intracapsular implantation. The characteristic and the removal time of theviscoelastic material as well as the postoperative IOP, corneal reaction and anteriorchamber reactions of the eyes were observed preoperatively and 24 hrs postoperatively.Exclusion criteria were glaucoma, a preoperative dilated pupil diameter smaller than 5.0mm, proliferative diabetic retinopathy, significant corneal pathology or a history ofuveitis.Results: The removal time was 47.42 ± 13.09 seconds in Healon 5, 16. 50 ± 5.45 inHealon GV and 15.83±7.40 in Iviz. The removal time of Healon 5 group wassignificantly longer than that of the other groups ( P =0. 000) . There is no significantIOP change 24 hours postoperatively and the difference of intraocular pressure amongthree groups was not significant ( P ＞ 0.05). Healon 5 group had the slightest cornealand anterior chamber response, followed by Healon GV and Iviz.Conclusion: Although takes longer time to remove, Healon 5 is an ideal viscoelasticmaterial for its superior space maintenance capacity and high dispersity which providessuperior protection of endothelial cells compared to Healon GV and Iviz.

Research on Thermal Properties of Nomex Fiber and Nomex/Viscose Blended Fabric

Based on the analysis of the properties of Nomex 450 and Nomex 462,the thermal properties of Nomex 462/Lenzing Viscose Flame retardent(FR)blending materials were analyzed.It was discovered through burning test and Thermal Gravity(TG)analysis that the blended material was superior in thermal behaviors to the material made from either Nomex or Viscose FR filament,when the ratio of Nomex and Lenzing Viscose FR reached 80∶20,and excellent thermal properties were achieved with the value of Limiting Oxygen Index(LOI)up to 36.1%.Blending Nomex and Viscose FR filaments may be recommended for better fire retardant property of related fabric.

Initial search for low grade clay in Pakistan for producing LC^(3) ecofriendly cement

Industrialization has though brought comfort to our daily lives,but it has placed a lot of pressure on the planet’s natural resources,subsequently,it has adversely affected the environment.As the need for cement in the construction sector has grown,it has climbed dramatically globally.Around the world,more than 10 billion cubic meters of concrete are produced each year;it is doubtful that this volume will decrease.A significant expected rise in CO_(2) emissions is caused by increased cement demand.According to the UN Environment Program,buildings are responsible for up to 41%of global anthropogenic carbon emissions.The primary source of greenhouse gases utilized in the manufacturing of cement is clinker.Due to the unsustainable supply of fly ash,calcined clay appears to be a better Supplemental Cementitious Material(SCMs).Kaolin clay is widely available in Pakistan.The purpose of this investigation is to describe the mineral and thermal characteristics of Pakistani clays by examining their geographic distribution.Clay samples were gathered from 39 different places throughout Pakistan during a field investigation program.X-ray diffraction,X-ray Fluorescence,Reactivity,and thermogravimetric analyses were used to analyze the clay samples’mineral content and thermal characteristics.This study demonstrates that Pakistan has a substantial amount of kaolin clay reserves close to existing groups of cement plants.Pakistani clays can be utilized as SCM in the production of limestone calcined clay cement(LC^(3))due to the country’s vast kaolin clay reserves.This study further supports the viability of producing LC^(3) in the nation by providing a thorough analysis of the cement business,known deposits of qualifying clay,and the country’s cement production process.

Characteristics of two types of C-S-H gel in hardened complex binder pastes blended with slag

The characteristics of C-S-H gel in hardened Portland cement pastes and complex binder pastes with ground granulated blast furnace slag were investigated with nanoindentation. The composition of C-S-H gel was analysed with SEM-EDS. The obtained results showed that the volume fraction of LD C-S-H gradually reduced and the volume fraction of HD C-S-H increased with the prolongation of hydration age. Most of the C-S-H gel produced at later age was HD C-S-H. The volume fraction of HD C-S-H increased as the fraction of slag in complex binder pastes increased, suggesting that HD C-S-H was mainly in the hydration products of slag. The chemichal compositions of the two types of C-S-H gel were simlar, meaning that formation and transformation of the two types of C-S-H gel were not affected by their Ca/Si ratio.