体位复位联合单侧入路经皮椎体成形术的临床应用研究

目的探讨老年骨质疏松性椎体压缩骨折合并裂隙样变运用单侧入路经皮椎体成形术联合体位复位对患者椎体高度及手术时间的影响。方法2019年2月至2021年2月选取本院收治的骨质疏松性椎体压缩性骨折患者120例,将其分为对照组80例(未合并椎体内裂隙样变)和观察组40例(合并椎体内裂隙样变),依据影像学检查按照患者是否合并椎体内裂隙样变进行分组,两组均采用单侧入路经皮椎体成形术联合体位复位对其进行治疗,两组患者均观察至患者术后2周。对比两组手术、术后下床活动时间及骨水泥注入量,术前,术后1周椎体高度、VAS及ODI评分。结果对照组患者的骨水泥注入量较观察组相比,更少;相较于术前,术后1周两组前缘、中央、后缘均缩短,且术前、术后1周观察组均短于对照组;较术前,术后1周两组VAS及ODI评分均降低,且对照组低于观察组,差异有统计学意义(均P<0.05)。结论单侧入路经皮椎体成形术联合体位复位对老年骨质疏松性椎体压缩骨折合并裂隙样变患者术后疼痛、骨水泥弥散及功能障碍改善效果均较好。

Confidence高黏度骨水泥椎体成形系统结合体位复位治疗急性重度骨质疏松性椎体压缩骨折

目的探讨应用Confi dence高黏度骨水泥椎体成形系统结合体位复位治疗急性重度骨质疏松性椎体压缩骨折(osteoporotic vertebral compression fracture,OVCF)的临床效果。方法回顾分析2004年6月-2009年6月采用Confi dence高黏度骨水泥及其椎体成形系统结合体位复位治疗34例急性重度OVCF患者的临床资料。男14例,女20例;年龄62～88岁,平均72.6岁。均为单椎体骨折。损伤节段:T11 4例,T12 10例,L1 15例,L2 4例,L3 1例。骨密度测定T值均≤—2.5,提示骨质疏松。伤后至入院时间2～72 h。术前先对压缩椎体行腰椎过伸位复位7～14 d,术中采用单侧穿刺,经椎弓根入路,每个椎体注射骨水泥2～6 mL,平均3.2 mL。结果术中3例(8.8%)椎体出现不同程度骨水泥渗漏,其中2例椎体渗漏至椎间隙,1例椎体渗漏至椎旁软组织;均无临床症状,未行处理。患者均无肺栓塞、感染和神经损伤等并发症发生。34例均获随访,随访时间12～38个月,平均18.5个月。术后31例术前疼痛症状完全缓解,3例部分缓解;未见伤椎再骨折、骨与骨水泥界面松动及相邻椎体骨折发生。术后3 d及末次随访时伤椎前中柱椎体高度、后凸Cobb角及疼痛视觉模拟评分(VAS)均较术前显著改善(P<0.05),术后3 d与末次随访时比较差异无统计学意义(P>0.05)。结论 Confi dence高黏度骨水泥椎体成形系统具有瞬间高黏度、可注射时间长、定向可控注射等优点,降低了骨水泥渗漏风险,术前结合体位复位治疗急性重度OVCF疗效较好。

透视下体位转复治疗胃扭转36例分析

目的:提高胃扭转体位转复法治疗水平,避免盲目复位,减少复发。方法:临床症状以上腹部不适为主,常伴有恶心、呕吐、反酸等,经X线检查诊断为慢性胃扭转36例,均为器官轴型,其中,前式19例,后式17例,根据前式或后式对其进行透视下体位转复治疗。结果:36例施以体位转复治疗均获成功,其中,11例一次复位成功,18例2次成功,7例3次成功。复位后查出胃疾病11例。复发2例。结论:本复位方法简便,只要掌握好适应证,方法得当,复位率较高;复位后可进一步查找胃疾病,避免漏诊,有一定的临床实用价值。

慢性胃扭转的X线诊断及体位转复治疗

目的:提高胃扭转X线诊断及体位转复法治疗水平,避免盲目复位,减少复发。回顾分析本院近3年来50例经气钡双重造影确诊的慢性胃扭转体位转复方法,50例慢性胃扭转均为器官轴型。结果:50例施以体位转复治疗均获成功。结论:胃十二指肠气钡双重造影能对慢性胃扭转做出准确诊断,口服大量稀钡透视下复位效果较好。复位后可进一步查找胃疾病,避免漏诊,有一定的临床实用价值。

Preparation and wear properties of TiB_2/Al-30Si composites via in-situ melt reactions under high-energy ultrasonic field

TiB2/Al-30Si composites were fabricated via in-situ melt reaction under high-energy ultrasonic field. The microstructure and wear properties of the composite were investigated by XRD, SEM and dry sliding testing. The results indicate that TiB2 reinforcement particles are uniformly distributed in the aluminum matrix under high-energy ultrasonic field. The morphology of the TiB2 particles is in circle-shape or quadrangle-shape, and the size of the particles is 0.1-1.5μm. The primary silicon particles are in quadrangle-shape and the average size of them is about 10μm. Hardness values of the Al-30Si matrix alloy and the TiB2/Al-30Si composites considerably increase as the high energy ultrasonic power increases. In particular, the maximum hardness value of the in-situ composites is about 1.3 times as high as that of the matrix alloy when the ultrasonic power is 1.2 kW, reaching 412 MPa. Meanwhile, the wear resistance of the in-situ TiB2/Al-30Si composites prepared under high-energy ultrasonic field is obviously improved and is insensitive to the applied loads of the dry sliding testing.

A Recursive Algorithm for Offspring's Genotype Frequency of Selfing Population on Multiple Alleles with Limited Loci

This paper studies the offspring＇s genotype frequency of the selfing population on multiple alleles with limited loci.A recursive algorithm is given for it.It is discovered that the genotype frequency of homozygous gene of limited loci increases by generations.Relative increment reduces by generations and the genotype frequency tends to a definite value finally.The genotype frequency of limited loci with hybrid gene tends to 0 finally.But it is possibility that the genotype frequency increases in previous generations then reduces later.It is found that the number of the hybrid gene are more,the speeds tending to 0 are quicker.

Isolation and Chromosomal Mapping of a Corn B Chromosome Specific RAPDs

B染色体存在于多种动植物中 ,具有很多独特的性状。B染色体与正常染色体在DNA组成方面十分相似 ,寻找B染色体特异序列一直是B染色体研究的难点和热点。通过对含有和不含有B染色体的两种玉米 (ZeamaysL .)基因组进行了RAPD分析 ,筛选到一个B染色体特异性分子标记B480。该标记与玉米的自主复制起始序列ARS1和ARS2同源 ,特别是该序列中的 2 5bp出现在多种模式生物基因组中。FISH的结果显示 。

Contrastive thematic analysis in research articles

Based on the theory of thematic complexity, a contrastive analysis on 2 sections selected from research articles-method and discussion, was conducted. The differences and similarities between the 2 sections in simple theme, multiple theme, textual theme, interpersonal theme, topical theme and thematic progression were analyzed and concluded. The author believes that the causes of the differences and similarities are the different genre features of the 2 sections and the academic features of the materials selected.

Preassembly and ligand-induced restructuring of the chains of the IFN-γ receptor complex： the roles of Jak kinases, Statl and the receptor chains

We previously demonstrated using noninvasive technologies that the interferon-gamma （IFN-γ） receptor complex is preassembled [ 1 ]. In this report we determined how the receptor complex is preassembled and how the ligand-mediated conformational changes occur. The interaction of Statl with IFN-γR1 results in a conformational change localized to IFN- γR1. Jakl but not Jak2 is required for the two chains of the IFN-γ receptor complex （IFN-γR1 and IFN-γR2） to interact; however, the presence of both Jakl and Jak2 is required to see any ligand-dependant conformational change. Two IFN- γR2 chains interact through species-specific determinants in their extracellular domains. Finally, these determinants also participate in the interaction of IFN-γR2 with IFN-γR1. These results agree with a detailed model of the IFN-γ receptor that requires the receptor chains to be pre-associated constitutively for the receptor to be active.

Preparation of defect free ceramic/Ti composite membranes by surface modification and in situ oxidation

Al2O3 ceramic powder was applied to modify the large pores defects on the surface of the porous metal Ti support,in situ oxidation method was a convenient method to prepare defect free ceramic/Ti composite membranes on this basis.In situ oxidation conditions experimental results show that the best condition for preparing the TiO2-Al2O3/Ti composite membrane is under 800°C for 2 h,and the microstructure and pore sizes of the TiO2-Al2O3/Ti composite membranes are affected obviously.The thickness and composition of the TiO2/Ti composite membranes are determined by SEM and XRD completely.The pore size distribution of the composite membrane is measured by bubble pressure method,the most probable aperture is about 3.12μm,while the average pore size of defect free TiO2-Al2O3/Ti is about 3.23μm.After ultrasonic treatment,the slight weight change of membranes reveals no observable change,which indicates that TiO2-Al2O3/Ti composite membranes maintain a good stability.

Low Voltage Active Pixel Sensor Based on PMOS Restoration Transistor

Presented was an optimum designed CMOS active pixel sensor.In this sensor,used is a PMOSFET substituting for the NMOSFET in traditional sensor as restoration transistor.Compared with traditional active pixel sensor under the same condition based on 0.25μm CMOS technology,simulating results show that the new structure device has higher signal-to-noise ratio,wider output swing,wider dynamic range and faster readout speed.

Investigation on the threshold control of safety blasting vibration velocity for the extraction of complicated orebody under railway

The threshold control of safety blasting vibration velocity is a significant process for the underground mining of complicated ore deposit under construction,road,and water.According to the equivalent principle of displacement and velocity of mass point,differential evolution is put forward based on 3DEC dynamic analysis,making the calculation more efficient and accurate.The 3DEC model of the complicated orebody under railway is established according to the topographic maps and geological data of the eastern Pyrite Mine.The stimulus-response distribution of internal stress and displacement fields are demonstrated by analyzing the on-site monitoring vibration displacement and velocity data of the mass point.The reliability of parameter selection,such as blasting simulation waveforms,rock damping,is identified.The safety vibration velocity of railway is set to 4.5 cm/s in line with the requirement of safety blasting rules.Thus,the maximum amount of single-stage explosive in this region is 44.978 kg.The simulation result is in good agreement with the on-site monitoring datum.No displacement and settlement of the 701 railway special line was achieved by choosing the critical amount of the single-stage explosive.

正念减压疗法在鼻内镜下鼻窦炎鼻息肉手术护理中的应用效果

探讨正念减压疗法在鼻内镜下鼻窦炎鼻息肉手术护理中的应用效果。方法 选取我院2021年10月-2022年10月收治的鼻窦炎鼻息肉患者108例,患者均采取鼻内镜手术治疗,随机分为对照组和研究组两组,各54例。对照组患者应用常规护理疗法,研究组患者应用正念减压疗法。结果 对比心理痛苦得分,与对照组比,研究组心理痛苦得分降幅更大,并且得分更低(P<0.05);对比护理后心理痛苦问题,与对照组比,研究组护理后心理痛苦问题更少(P<0.05);对比焦虑抑郁情况,与对照组比,研究组护理后焦虑抑郁情况好转更多(P<0.05)。结论 将正念减压疗法应用到鼻内镜下鼻窦炎鼻息肉手术护理过程当中,正念减压疗法护理效果理想,这不仅能够降低患者心理痛苦程度,减少患者由于疾病以及术后所带来的心理痛苦问题,还能有效缓解患者焦虑抑郁不良情绪,临床上值得进一步推广应用。

Position Group Contribution Method for Predicting the Normal Boiling Point of Organic Compounds

A new position group contribution model is proposed for the estimation of normal boiling data of organic compounds involving a carbon chain from C2 to C18.The characteristic of this method is the use of position distribution function.It could distinguish most of isomers that include cis-or trans-structure from organic compounds.Contributions for hydrocarbons and hydrocarbon derivatives containing oxygen,nitrogen,chlorine,bromine and sulfur,are given.Compared with the predictions,results made use of the most common existing group contribution methods,the overall average absolute difference of boiling point predictions of 417 organic compounds is 4.2 K;and the average absolute percent derivation is 1.0%,which is compared with 12.3 K and 3.2% with the method of Joback,12.1 K and 3.1% with the method of Constantinou-Gani.This new position contribution groups method is not only much more accurate but also has the advantages of simplicity and stability.

Chromosomal localization of a tandemly repeated DNA sequence in Trifolium repens L

A karyotype of Trifolium repens constructed from mitotic cells revealed 13 pairs of metacentric and 3 pairs of submetacentric chromosomes including a pair of satellites located at the end of the short arm of chromosome 16.C-bands were identified around the centromeric regions of 8 pairs of chromosomes. A 350 bp tandemly repeated DNA sequence from T. repens labelled with digoxygenin hybridized to the proximal centromeric regions of 12 chromosome pairs. Some correlation between the distribution of the repeat sequence and the distribution of C-banding was demonstrated.

Multifunctional electrospinning composite fibers for orthotopic cancer treatment in vivo

A multifunctional, dual-drug carrier platform was successfully constructed. Core-sheU structured NaGdF4：Yb/Er@NaGdF4：Yb@mSiO2-polyethylene glycol （abbreviated as UCNPS） nanopartides loaded with the antiturnor drug, doxorubicin （DOX） were incorporated into poly（^-caprolactone） （PCL） and gelatin loaded with antiphlogistic drug, indomethacin （MC） to form nanofibrous fabrics （labeled as MC/UCNPS/DOX） via electrospinning process. The resultant multifunctional spinning pieces can be surgically implanted directly at the tumor site of mice as an orthotopic chemotherapy by controlled-release DOX from mesoporous silicon dioxide （SiO2） and upconversion fluorescence/magnetic resonance dual-model imaging through NaGdF4：Yb/Er@NaGdF4：Yb embedded in MCfldCNPS/DOX invivo.

Ectopic major transplantation for salvage of upper anct ower extremity amputations

Objective：Ectopic tissue transplantation is not a new idea.Godina and his colleagues pioneered this method in the 1980s.This method is a last resort method of preserving an amputated body part,which consists of banking the amputated segment in an ectopic area and returning it to its native place at a later date.In this article we present our experience with this demanding procedure.Methods：Debridement was the mainstay of this procedure.The stump and amputated part are carefully debrided and the stump was either closed primarily or covered by a flap.The amputated part was transplanted to one of several banking sites in the body and at a later date it will be transferred to its native site in an elective setting.Results：Seven patients meeting the set criteria for ectopic transplantation were enrolled in this study.The overall success rate was about 70%,lower than expected but these are cases of severe crush injury.Although the functional recovery of these patients are very low,all of the successful cases except one could find a job as a janitor or light manual worker.No patient could return to his previous job.Conclusion：Ectopic transplantation of body parts is an accepted method of treatment of severely crushed extremity or finger injuries.In our country an amputee has very little chance of finding a job instead a disabled person can.In addition in Iran cultures amputation is seen as punishment of either the God or the society,so it is not well accepted and many patients persist on saving the limb even with no functional recovery.None of our successful cases could return to his previous occupation but almost all of them could find a job as janitors or light manual workers.

Flexible fabric gas sensors based on PANI/WO3 p−n heterojunction for high performance NH3 detection at room temperature

A PANI/WO3@cotton thread-based flexible sensor that is capable of detecting NH3 at room temperature is developed here.A layer of WO3 with PANI nanoparticles can be deposited by in-situ polymerization.The morphology and structure of the specimens were investigated by utilizing TEM,SEM,XRD and FTIR.The sensing performance of the PANI/WO3@cotton sensors with different WO3 molar ratios to NH3 at room temperature was examined.The results show that the optimal sensor(10 mol%WO3)has a response of 6.0 to 100 ppm NH3,which is significantly higher than that of the sensors based on pristine PANI and other composites.The PANI/WO3@cotton sensor also displays excellent selectivity,gas response,and flexibility even at room temperature.The unique fiber structure,p-n heterojunction,and the increased protonation of PANI in the composites contribute to the enhanced sensing property.

Estimation of rod-like phase spacing in melt-grown eutectic composites

Directional solidification of rod-like eutectic is an important route to produce in situ composites.The rod-like phase spacing of composites is a crucial parameter in determining the properties of the materials.In this study,the rod-like phase spacing of melt-grown in situ eutectic composites is estimated by the method that is established based on the classical Jackson-Hunt theory and completed by considering the minimum undercooling principle in eutectic solidification at steady state.The density difference between the solid phases is also considered when calculating the diffusion field in the liquid.It is found that the rod-like phase spacing of in situ eutectic composites is generally a not unique value but displays a finite range under fixed growth conditions.Also,the range width,which decreases with increasing growth rate and vice versa,is only dependent on the intrinsic properties of an alloy at a given growth rate.By comparing with the experimental observations,the results show that the predicted spacings are in reasonable agreement with experimental data for nonfaceted-nonfaceted Succinonitrile-(D)camphor,MnSb-Sb,and Al-Al3Ni alloys and faceted-nonfaceted MnBi-Bi system when growing in a coupled manner.