负压封闭引流治疗厌氧菌感染创面的临床观察

目的:观察负压封闭引流联合双氧水冲洗治疗厌氧菌感染创面的临床治疗效果。方法:收集我院收治的创面厌氧菌感染患者60例,随机分为两组。其中,对照组(30例)患者采用常规换药治疗创面厌氧菌感染,VSD组(30例)患者给予负压封闭引流并辅以双氧水冲洗治疗。观察并比较两组患者厌氧菌清除率,以及创面愈合情况。结果:VSD组创面厌氧菌感染率明显低于对照组,创面愈合效果优于对照组,差异有统计学意义(P0.01)。结论:负压封闭引流不仅能够有效控制感染创面厌氧菌生长,而且可以有效促进创面愈合,对临床具有指导意义。     

腓肠肌皮瓣联合负压封闭引流治疗胫骨慢性骨髓炎及软组织缺损的临床研究

目的:研究腓肠肌皮瓣联合负压封闭引流治疗胫骨慢性骨髓炎及软组织缺损的临床疗效。方法:选取2013年10月到2014年10月我院收治的胫骨慢性骨髓炎及软组织缺损患者68例,按照手术方式不同将患者分为研究组(n=39例)和对照组(n=29例),其中研究组给予腓肠肌皮瓣联合负压封闭引流治疗,对照组给予常规手术方法治疗,比较两组临床疗效、C反应蛋白(CRP)变化、治愈时间以及复发率。结果:研究组治愈率94.9%(37/39)显著高于对照组的75.9%(22/29),两组比较差异具有统计学意义(P0.05);研究组CRP变化和治愈时间均显著优于对照组,两组比较差异具有统计学意义(P0.05);研究组复发率显著低于对照组,两组比较差异具有统计学意义(P0.05)。结论:腓肠肌皮瓣联合负压封闭引流治疗胫骨慢性骨髓炎及软组织缺损具有较高治愈率,能显著降低炎性反应,缩短愈合时间,降低复发率。     

负压封闭引流技术用于骨科感染创面的临床价值

目的观察负压封闭引流技术(VSD)用于骨科感染创面的临床疗效。方法选取2013年6月至2015年6月于松阳县人民医院就诊的骨科创面感染患者48例,应用随机数字法分为对照组和观察组,每组24例。对照组采用一般临床治疗,术后常规换药,而观察组采用负压封闭引流技术治疗。比较两组患者二次手术率、换药次数、创面愈合组织病理学评分、愈合时间、抗菌药物使用时间、总住院时间以及临床疗效等指标。结果观察组术后行二次手术率为4.16%,显著性低于对照组(29.2%)(P0.05);观察组术后创面愈合组织病理学评分(8.4±1.1)分、抗菌药物使用时间(6.3±1.2)d、抗生素费用(206±16)元、换药次数(2.8±1.0)次、愈合时间(17.9±1.6)d及总住院时间(20.1±4.3)d均优于对照组,差异有统计学意义(P0.01);治疗后观察组总有效率为95.8%,显著性高于对照组的70.8%(χ~2=5.400,P0.05)。结论应用VSD于骨感染创面的修复中,临床疗效显著,操作简便,值得临床推广。     

眼镜蛇咬伤溃疡早期的临床研究

目的探讨改良负压封闭引流技术在眼镜蛇咬伤溃疡早期的应用效果。方法选取眼镜蛇咬伤溃疡早期患者60例,随机分为对照组和观察组,对照组采用传统的包扎换药治疗,观察组应用改良负压封闭引流技术联合糜蛋白酶治疗,观察比较两组患者的临床治疗效果。结果观察组患者的住院时间、材料消耗、抗生素使用费用等均低于对照组,差异有统计学意义(P0.05)。观察组患者换VSD或换药次数、消肿时间、止痛时间等均少于对照组,而且溃疡愈合时间短于对照组,差异均有统计学意义(P0.05)。两组患者治疗第3天的C反应蛋白指标比较,差异无统计学意义(P0.05);但对照组治疗第7天二期植皮时间及C反应蛋白指标明显高于观察组(P0.05)。两组患者的致残率比较,观察组明显低于对照组(P0.05);而且创面感染率比较,观察组为3.3%明显低于对照组的16.67%,差异有统计学意义(P0.05)。结论改良负压封闭引流技术能显著缩短溃疡愈合时间,且并发症少,治疗效果显著。     

VSD联合金因肽治疗手足外科难愈性伤口的临床研究

目的:观察封闭式负压引流技术(VSD)联合金因肽治疗手足外科难愈性伤口的临床疗效,为临床联合运用提供依据。方法:86例手足外科难愈性伤口患者随机分为治疗组和对照组各43例,治疗组采用VSD联合金因肽治疗,对照组采用常规换药治疗,观察两组临床疗效和上皮化时间、愈合时间、创面愈合率、换药次数、伤口疼痛评分、住院费用差异。结果:治疗组总有效率90.70%;对照组总有效率72.09%;两组比较,有显著性差异(P0.05);治疗组上皮化时间、愈合时间、创面愈合率、换药次数、伤口疼痛评分、住院费用较对照组相比明显缩短,差异有统计学意义(P0.05)。结论:VSD联合金因肽治疗手足外科难愈性伤口疗效确切,能更好促进损伤组织的修复,加速创面愈合,值得临床推广应用。     

负压封闭引流技术用于骨科感染创面的临床价值分析

摘要 目的 观察负压封闭引流技术（VSD）用于骨科感染创面的临床疗效 方法 选取2013年6月至2015年6月于松阳县人民医院就诊的骨科创面感染患者48例,应用随机数字法分为对照组和观察组,每组24例。对照组采用一般临床治疗,术后常规换药,而观察组采用负压封闭引流技术治疗。比较两组患者二次手术率、换药次数、创面愈合组织病理学评分、愈合时间、抗菌药物使用时间、总住院时间以及临床疗效等指标 结果 观察组术后行二次手术率为4.16%,显著性低于对照组（29.2%）（P<0.05）;观察组术后创面愈合组织病理学评分（8.4±1.1）分、抗菌药物使用时间（6.3±1.2）d、抗生素费用（206±16）元、换药次数（2.8±1.0）次、愈合时间（17.9±1.6）d及总住院时间（20.1±4.3）d均优于对照组,差异有统计学意义（P<0.01）治疗后观察组总有效率为95.8%,显著性高于对照组的70.8%（χ2=5.400,P<0.05）结论 应用VSD于骨感染创面的修复中,临床疗效显著,操作简便,值得临床推广。     

负压创面治疗肝源性糖尿病并发糖尿病足的研究

目的:讨论创面负压治疗促进肝硬化合并糖尿病并发糖尿病足的临床疗效。方法:将30例慢性肝硬化合并糖尿病并发糖尿病足患者随机分为创面负压治疗组和敷料包扎组,观察两组创面细菌负荷及创面微循环血流量变化。结果:清创即刻,负压创面治疗组和敷料包扎组细菌负荷与创面微循环血流量无显著差异(P>0.01);创后3天、6天和9天时,负压创面组创面细菌负荷低于敷料包扎组(P<0.01),创面微循环血流量高于敷料包扎组(P<0.01)。负压创面组创面愈合时间少于敷料包扎组(P<0.01)。结论:负压创面治疗有助于慢性肝硬化并发糖尿病合并糖尿病足的创面愈合。     

负压封闭引流技术联合前列地尔注射液对重度烧伤患者的疗效观察

目的:研究负压封闭引流技术联合前列地尔注射液对重度烧伤患者的疗效观察。方法:选取2017年2月至2018年2月的67例患者。按照随机数表法分为观察组(n=36)和对照组(n=31),对照组采用负压封闭引流技术治疗,观察组采用负压封闭引流技术联合前列地尔注射液治疗。观察两组治疗疗效情况,临床治疗指标(创面愈合时间、创面愈合率、VAS评分、住院时间),C反应蛋白(CRP)、降钙素原(PCT)水平,不良反应发生率。结果:治疗后,观察组总有效率显著高于对照组[86.11%(31/36)vs 61.29%(19/31)](P0.05);创面愈合时间、创面愈合率、VAS评分、住院时间均显著低于对照组[(16.93±4.19)天vs(24.27±6.01)天,(92.72±5.03)%vs(81.34±2.48)%,(2.93±0.52)分vs(6.70±1.30)分,(24.09±7.43)天vs(46.98±10.72)天](P0.05);CRP、PCT水平均显著低于对照组[(27.93±3.81)mg/L vs(83.86±7.43)mg/L,(0.10±0.02)ng/L vs(0.43±0.06)ng/L](P0.05);不良反应总发生率显著低于对照组[8.33%(3/36)vs 38.70%(12/31)](P0.05)。结论:负压封闭引流技术联合前列地尔注射液对重度烧伤患者的疗效显著,可促进创面恢复,避免感染,并发症少,安全可靠。     

负压封闭引流对兔颅骨外露创面愈合效果的实验研究

目的:探讨负压封闭引流技术(VSD)对兔颅骨外露缺损创面愈合的治疗效果。方法:选取成年新西兰大白兔76只,平均分为四组并建立兔颅骨外露实验模型。其中,A组(19只):于兔颅骨上方制作直径为2.0cm的圆形创面,保留骨膜,采用-120mmHg负压引流和常规换药治疗;B组(19只):实验动物处理同A组,仅采用常规换药治疗;C组(19只):在兔颅骨上制作直径2.0cm的圆形创面,剔除骨膜,治疗方法同A组;D组(19只):实验动物处理同C组,治疗方法同B组。每组各抽取10只,观察创面愈合率和创面愈合时间;其余9只分别在第7天、10天、20天、30天进行取材检测,分析疗效机制。结果:A组创面愈合时间为19.40±1.65天,B组为24.00±2.31天;C组为25.40±4.43天,D组为30.00±5.50天。运用VSD治疗和常规治疗创面愈合时间比较有统计学意义(P0.05)。结论:VSD治疗兔骨外露缺损创面能有效缩短创面愈合时间,促进血管再生,胶原蛋白合成。     

封闭负压引流结合局部氧疗可有效治疗创伤性慢性伤口

为研究封闭负压引流结合局部氧疗对慢性创伤性伤口患者的伤口微环境、伤口细菌感染、伤口治愈率和伤口治愈时间的影响,本研究选择2015年2月至2016年11月期间来我院治疗的88例慢性创伤性伤口患者,按随机数字表法将88例患者分为对照组(44例)和干预组(44例)。干预组采用封闭负压引流结合局部氧疗连续治疗15 d,对照组仅采用封闭负压引流疗法连续治疗15 d。观察两组患者治疗前后伤口渗液酸碱度、伤口温度、伤口细菌感染种类和伤口细菌感染阳性率,以及3个月随访结束时两组患者的伤口治愈率和伤口平均治愈时间。研究结果显示,治疗后,两组患者伤口渗液酸碱度时间效应、干预效应及时间和干预交互效应均有极显著差异(p0.01);两组患者伤口温度的时间效应和干预效应均有极显著差异(p0.01);干预后,干预组患者总的细菌阳性率(15.9%)显著低于对照组(54.5%)。随访结束时,干预组患者伤口治愈率(86.4%)显著高于对照组(61.4%);干预组患者的伤口治愈时间((38.65±9.39)d)显著短于对照组((52.00±9.58)d)。本研究表明,负压封闭结合局部氧疗治疗可优化伤口微环境,强化除茵抑菌作用,有助于提高伤口治愈率和缩短愈合时间。     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

Entwicklungsgeschichte und Ultrastruktur von Pollenkitt und Exine bei nahe verwandten entomophilen und anemophilen Angiospermensippen derAlismataceae,Liliaceae, Juncaceae,Cyperaceae, Poaceae undAraceae

Some closely related members of the monocotyledonous familiesAlismataceae, Liliaceae, Juncaceae, Cyperaceae, Poaceae andAraceae with variable modes of pollination (insect- and wind-pollination) were studied in relation to the ultrastructure of pollenkitt and exine (amount, consistency and distribution of pollenkitt on the surface of pollen grains). The character syndromes of pollen cementing in entomophilous, anemophilous and intermediate (ambophilous or amphiphilous) monocotyledons are the same in principal as in dicotyledons. Comparing present with former results one can summarize: 1) The pollenkitt is always produced in the same manner by the anther tapetum in all angiosperm sub-classes. 2) The variable stickiness of entomophilous and anemophilous pollen always depends on the particular distribution and consistency of the pollenkitt, but not its amount on the pollen surface. 3) The mostly dry and powdery pollen of anemophilous plants always contains a variable amount of inactive pollenkitt in its exine cavities. 4) A step-by step change of the pollen cementing syndrome can be observed from entomophily towards anemophily. 5) From the omnipresence of pollenkitt in all wind-pollinated angiosperms studied one can conclude that the ancestors of anemophilous angiosperms probably have been zoophilous (i.e. entomophilous) throughout.

     

Identification and Characterization of the First Equine Parainfluenza Virus 5

正Dear Editor,Parainfluenza virus 5 (PIV5), known as canine parainfluenza virus in the veterinary field, is a negative-sense,nonsegmented, single-stranded RNA virus belonging to the Paramyxoviridae family (Chen 2018). The virus was first reported in primary monkey kidney cells in 1954 (Hsiung1972), then it has been frequently discovered in various