Geology and Geochemistry of K-feldspar Veins in Lamprophyre at the Zhenyuan Gold Deposit,Yunnan,Southwest China:Implications for Gold Mineralization

Lamprophyres typically appear in hydrothermal gold deposits.The relationship between lamprophyres and gold deposits is investigated widely.Some researchers suggest that the emplacement of lamprophyres triggers gold mineralization,whereas others hypothesize that the formation of lamprophyres increases the fertility of mantle sources and ore-forming fluids.K-feldspar veins,with ages between those of lamprophyres and gold deposits,appear in lamprophyres in Zhenyuan.Therefore,K-feldspar veins are ideal for investigating the relationship between lamprophyres and gold deposits.Phlogopite in K-feldspar veins has lower Mg#,Ni,and Cr contents and higher TiO2,Li,Ba,Sr,Sc,Zr,Nb,and Cs contents than phlogopite in lamprophyres.The in-situ Sr isotopic values of apatites(0.7063–0.7066)in K-feldspar veins are within the range for apatites(0.7064–0.7078)from lamprophyres.High large-ion lithophile element concentrations and low Nb and Ta concentrations in phlogopite from lamprophyres,in addition to high(87Sr/86Sr)i values of apatite(0.7064–0.7078),indicate that the magma parental to these phlogopite and apatite crystals is derived from an enriched mantle.Kfeldspar veins are genetically correlated with lamprophyres,whereas sulfide mineral assemblage and trace element compositions of pyrite in K-feldspar veins suggest that K-feldspar veins in lamprophyres are not directly related to gold mineralization of the Zhenyuan deposit.

Modeling Blood Flow in Veins of Uniform Properties (Giraffe Jugular Vein)

This paper models the giraffe’s jugular veins as a uniform collapsible tube from a rigid skull. The equations governing one-dimensional steady flow through such a tube for various conditions have been developed. The effects of inertial and inclination angles that have not been discussed previously have been included. It has been shown that different flows for a uniform tube (vein) are possible. However, this flow matches that of a jugular vein which is supercritical, and the steady solution has been given by the balance between the driving forces of gravity and the viscous resistance to the flow at the right atrium of the heart must be sub-critical for a fixed right-atrium pressure which means that an elastic jump is required to return the flow to sub-critical from the supercritical flow upstream this type of relationship gives rise to flow limitation at the same time given any right atrium fixed pressure there exists a maximum flow rate which when exceeded the boundary conditions of the flow do not hold boundary conditions at the right atrium are not satisfied hence making the steady flow impossible this mechanism of flow limitation is slightly different from the other one in that causes airways through forced expiration from the observation made it is clearly shown that there is an intravascular pressure difference with a change in height.

Benefit in physical function and quality of life to nonsurgical treatment of varicose veins: Pilot study

BACKGROUND Studies on varicose veins have focused its effects on physical function;however,whether nonsurgical treatments alter muscle oxygenation or physical function remains unclear.Moreover,the differences in such functions between individuals with varicose veins and healthy individuals remain unclear.AIM To investigate changes in physical function and the quality of life(QOL)following nonsurgical treatment of patients with varicose veins and determine the changes in their muscle oxygenation during activity.METHODS We enrolled 37 participants(those with varicose veins,n=17;healthy individuals,n=20).We performed the following measurements pre-and post-nonsurgical treatment in the varicose vein patients and healthy individuals:Calf muscle oxygenation during the two-minute step test,open eyes one-leg stance,30 s sit-to-stand test,visual analog scale(VAS)for pain,Pittsburgh sleep quality index,physical activity assessment,and QOL assessment.RESULTS Varicose veins patients and healthy individuals differ in most variables(physical function,sleep quality,and QOL).Varicose veins patients showed significant differences between pre-and post-nonsurgical treatment—results in the 30 sit-to-stand test[14.41(2.45)to 16.35(4.11),P=0.018],two-minute step test[162.29(25.98)to 170.65(23.80),P=0.037],VAS for pain[5.35(1.90)to 3.88(1.73),P=0.004],and QOL[39.34(19.98)to 26.69(17.02),P=0.005];however,no significant difference was observed for muscle oxygenation.CONCLUSION Nonsurgical treatment improved lower extremity function and QOL in varicose veins patients,bringing their condition close to that of healthy individuals.Future studies should include patients with severe varicose veins requiring surgery to confirm our findings.

Multidetector computer tomography and magnetic resonance imaging of double superior mesenteric veins:A case report

BACKGROUND This study aimed to describe the findings of double superior mesenteric veins(SMVs),a rare anatomical variation,on multidetector computer tomography(MDCT)and magnetic resonance imaging(MRI)images.CASE SUMMARY We describe the case of a 34-year-old male,who underwent both MDC and MRI examinations of the upper abdomen because of liver cirrhosis.MDCT and MRI angiography images of the upper abdomen revealed an anatomic variation of the superior mesenteric vein(SMV),the double SMVs.CONCLUSION The double SMVs are a congenital abnormality without potential clinical manifestation.Physicians need to be aware of this anatomical variation during abdominal surgery to avoid iatrogenic injury.

In vivo quantification of human aqueous veins by enhanced depth imaging optical coherence tomography and optical coherence tomography angiography images

AIM:To investigate the aqueous vein in vivo by using enhanced depth imaging optical coherence tomography(EDI-OCT)and optical coherence tomography angiography(OCTA).METHODS:In this cross-sectional comparative study,30 healthy participants were enrolled.Images of the aqueous and conjunctival veins were captured by EDI-OCT and OCTA before and after water loading.The area,height,width,location depth and blood flow of the aqueous vein and conjunctival vein were measured by Image J software.RESULTS:In the static state,the area of the aqueous vein was 8166.7±3272.7μm^(2),which was smaller than that of the conjunctival vein(13690±7457μm^(2),P<0.001).The mean blood flow density of the aqueous vein was 35.3%±12.6%,which was significantly less than that of the conjunctival vein(51.5%±10.6%,P<0.001).After water loading,the area of the aqueous vein decreased significantly from 8725.8±779.4μm^(2)(baseline)to 7005.2±566.2μm^(2)at 45min but rose to 7863.0±703.2μm^(2)at 60min(P=0.032).The blood flow density of the aqueous vein decreased significantly from 41.2%±4.5%(baseline)to 35.4%±3.2%at 30min but returned to 45.6%±3.6%at 60min(P=0.021).CONCLUSION:The structure and blood flow density of the aqueous vein can be effectively evaluated by OCT and OCTA.These may become biological indicators to evaluate aqueous vein changes and aqueous outflow resistance under different interventions in glaucoma patients.

Phlebosclerosis: An overlooked complication of varicose veins that affects clinical outcome: A case report

BACKGROUND Phlebosclerosis is a common age-related fibrotic degeneration of the venous wall.It is a disorder rather than a disease,which may cause venous dysfunction and even venous thrombosis.It is rarely reported in patients with varicose veins.CASE SUMMARY The present report describes the case of a 70-year-old man with varicose veins,vitiligo,and phlebosclerosis.Venous angiography revealed blood reflux in the superficial and deep veins.The patient underwent surgery to remove the saphe-nous veins.During the operation,a calcified vein resembling a wooden stick was found,which was surprisingly extracted from the thickened venous wall.A cross-section of this wooden stick-like vein revealed venous fibrosis and calcification,obvious thickening of the venous wall,extensive collagen deposition on the venous wall,hyaline degeneration,and venous sclerosis causing closure of the venous lumen.CONCLUSION This is probably the first report of a wooden stick-like structure being found in the venous wall in patients with varicose veins and venous ulcers.Phlebosclerosis can be observed in the late stage of varicose veins complicated by frequent infections and worse clinical outcomes.Therefore,it is important to be aware of this condition and address it rather than overlook it.

劈离式供肝儿童肝移植门静脉并发症的诊断与治疗

目的探讨劈离式供肝儿童肝移植门静脉并发症的诊断及治疗策略。方法回顾性分析接受劈离式肝移植的88例儿童受者的临床资料。术中根据受者门静脉内径、发育情况,利用门静脉左右分支处进行吻合或间置供者髂静脉搭桥吻合,围手术期采用规范化的门静脉血流监测,术后按肝素钠桥接华法林的方案进行抗凝治疗。经增强CT或门静脉造影确诊门静脉狭窄或血栓形成后,予切开取栓、全身抗凝、介入下取栓、球囊扩张和(或)支架置入等处理。结果88例受者中共10例患儿确诊门静脉并发症,其中4例门静脉狭窄,确诊时间分别为术后1 d、2个月、8个月、11个月,6例门静脉血栓形成,确诊时间分别为术中、术后2 d、术后3 d(2例)、术后6 d、术后11个月。1例门静脉狭窄者和1例门静脉血栓形成者于围手术期死亡,门静脉并发症相关病死率为2%(2/88)。其余8例患者中,1例行全身抗凝治疗、2例行门静脉切开取栓术、1例行介入下球囊扩张、4例行介入下球囊扩张及支架置入,术后均长期随访,未再出现门静脉相关症状,复查门静脉血流参数正常。结论规范化的术中及术后门静脉血流监测有助于早期发现门静脉并发症,及时采取术中门静脉切开取栓,术后介入下球囊扩张、支架置入等手段可有效治疗门静脉并发症,减少门静脉并发症导致的移植物丢失和受者死亡。

Enlightenment of calcite veins in deep Ordovician Wufeng-Silurian Longmaxi shales fractures to migration and enrichment of shale gas in southern Sichuan Basin, SW China

The relationship between fracture calcite veins and shale gas enrichment in the deep Ordovician Wufeng Formation-Silurian Longmaxi Formation (Wufeng-Longmaxi) shales in southern Sichuan Basin was investigated through core and thin section observations, cathodoluminescence analysis, isotopic geochemistry analysis, fluid inclusion testing, and basin simulation. Tectonic fracture calcite veins mainly in the undulating part of the structure and non-tectonic fracture calcite veins are mainly formed in the gentle part of the structure. The latter, mainly induced by hydrocarbon generation, occurred at the stage of peak oil and gas generation, while the former turned up with the formation of Luzhou paleouplift during the Indosinian. Under the influence of hydrocarbon generation pressurization process, fractures were opened and closed frequently, and oil and gas episodic activities are recorded by veins. The formation pressure coefficient at the maximum paleodepth exceeds 2.0. The formation uplift stage after the Late Yanshanian is the key period for shale gas migration. Shale gas migrates along the bedding to the high part of the structure. The greater the structural fluctuation is, the more intense the shale gas migration activity is, and the loss is more. The gentler the formation is, the weaker the shale gas migration activity is, and the loss is less. The shale gas enrichment in the core of gentle anticlines and gentle synclines is relatively higher.

多元化健康教育模式在预防下肢骨折患者深静脉血栓中的应用

目的探讨多元化健康教育模式在预防下肢骨折患者深静脉血栓中的应用效果。方法采用便利抽样法,选取2021年1~12月收治的下肢骨折患者300例,按照住院时间将2021年1~6月收治的患者作为对照组,将2021年7~12月收治的患者作为观察组,每组150例。对照组采用常规健康教育模式,观察组采用多元化健康教育模式。比较2组患者对深静脉血栓的认知水平、基本预防措施依从性、深静脉血栓的发生率,以及患者对护理工作满意度。结果观察组患者对深静脉血栓的认知水平、对基本预防措施的依从性、护理满意度显著高于对照组(P<0.05)。观察组患者深静脉血栓发生率为16.00%低于对照组的25.33%,差异有统计学意义(P<0.05)。结论将多元化健康教育模式应用于下肢骨折患者,可提高护理效果,降低深静脉血栓的发生率,值得推广应用。

CPS视角的自动网联汽车虚拟仿真评测框架开发

为更好地评估和优化自动网联汽车系统的性能,利用OMNeT++和SUMO平台进行联合仿真,构建自动网联汽车虚拟仿真评测框架。评测框架中,SUMO用于生成交通道路网络和现实交通需求,OMNeT++基于真实地图为车辆网络搭建无线通信场景。结果表明,自动网联汽车虚拟仿真评测框架能够评估自动网联汽车系统的网络性能,为系统的优化和决策提供参考。

经同侧大隐静脉入路髂静脉成型及支架植入术在日间治疗模式中的应用

目的:探讨髂静脉狭窄患者经同侧大隐静脉入路髂静脉成型及支架植入术在日间治疗模式中应用的可行性和近期疗效。方法:回顾性分析2017年2月至2022年3月经同侧大隐静脉入路实施髂静脉成型及支架植入术日间模式治疗的病例,共21例,男6例,女15例,年龄37~79岁[(62.5±10.2)岁]。髂静脉狭窄中单纯累及髂总静脉16例,单纯累及髂外静脉2例,同时累及髂总及髂外静脉3例,均通过同侧大隐静脉入路行髂静脉成型及髂静脉支架植入术,同时存在大隐静脉瓣膜功能不全的单纯髂静脉狭窄患者同期行大隐静脉射频闭合及曲张静脉硬化治疗术。术后规律直接口服抗凝药治疗及压力治疗,所有患者住院时间均于小于24 h。结果:所有21例患者手术均成功(手术成功率100%),术中无并发症,术后即刻并发症中穿刺点出血1例,加压包扎纱布被完全浸湿,经再次压迫止血5 min后渗血停止,所有患者住院时间均于小于24 h。随访结果:术后3个月随访率100%,其中绝对有效18例(18/21,85.7%),相对有效(术后仍有色素沉着,但范围减小)3例(3/21,14.3%)。髂静脉支架均通畅,同期行大隐静脉射频治疗患者射频治疗段大隐静脉主干均闭合良好。术后6个月随访率71.4%(15/21),其中绝对有效14例(14/15,93.3%),相对有效(术后仍有色素沉着,但范围减小)1例(1/15,6.7%)。髂静脉支架均通畅,同期行大隐静脉射频治疗患者射频治疗段大隐静脉主干均闭合良好。结论:经大隐静脉入路髂静脉狭窄的介入治疗技术在日间治疗模式中可行,有明确优势,近期疗效满意。

成年病人经下肢行PICC的研究进展

就成年病人经下肢对外周静脉穿刺中心静脉置管(PICC)适应证、禁忌证、应用区域选择法(ZIM)技术优化置管穿刺部位,应用隧道、超声下不同平面穿刺技术以及心电图(ECG)定位下腔静脉系统内导管尖端位置等进行综述,以期为临床实践提供参考。

颈静脉、锁骨下静脉汇入无名静脉区的影像解剖分型研究及其在中心静脉置管中的应用

目的 研究双侧颈静脉、锁骨下静脉汇入无名静脉“三岔口”区的局部影像解剖并进行分型,初步探讨其在中心静脉置管中的应用。方法 河南科技大学第一附属医院2020年10月至2022年11月中心静脉置管病例389例,根据锁骨下静脉、颈静脉汇入无名静脉区局部影像解剖特点进行分型,右侧分为5型,左侧分为4型,结合置管后胸部X线片、CT检查、腔内心电及超声等资料明确中心静脉管位置,采用统计学方法分析“三岔口”区影像解剖分型与中心静脉导管异位的关系。结果 389例病例右侧“三岔口”区影像解剖分型中Ⅰ型占44.7%、Ⅱ型占24.7%、Ⅲ型占10.3%、Ⅳ型占17.2%、Ⅴ型占3.1%;左侧“三岔口”区影像解剖分型中Ⅰ型占29.3%、Ⅱ型占59.9%、Ⅲ型占9.8%、Ⅳ型占1.0%。经外周置入中心静脉导管(PICC)共271例,右侧入路180例中导管异位共24例,其中Ⅰ型3例、Ⅱ型5例、Ⅲ型4例、Ⅳ型7例、Ⅴ型5例,左侧入路91例中导管异位共3例,其中Ⅱ型2例、Ⅲ型1例;中心静脉导管异位发生率PICC右侧入路各型比较差异有统计学意义(χ^(2)=11.796,P=0.019),左侧入路各型比较差异无统计学意义(χ^(2)=2.073,P=0.557)。CVC置管118例,右侧入路104例中导管异位5例,其中Ⅱ型2例、Ⅲ型2例、Ⅳ型1例,左侧入路14例中导管异位3例,其中Ⅱ型2例、Ⅳ型1例,中心静脉导管异位发生率CVC右侧入路各型比较差异无统计学意义(χ^(2)=7.403,P=0.116),左侧入路各型比较差异无统计学意义(χ^(2)=4.497,P=0.213)。结论 颈静脉、锁骨下静脉汇入无名静脉区的影像解剖分型右侧Ⅰ型最多见,左侧Ⅱ型最多见,局部影像解剖分型与中心静脉导管异位存在一定关系。

早产儿经不同外周静脉置入中心静脉导管的效果分析

目的:探讨早产儿经不同外周静脉置入中心静脉导管的效果。方法:选取2020年7月—2022年6月于玉林市第一人民医院行经外周静脉置入中心静脉导管(PICC)的早产儿90例作为研究对象,随机分为上肢静脉组、下肢静脉组及头部静脉组,各30例。上肢静脉组、下肢静脉组及头部静脉组均行PICC,位置分别为上肢静脉、下肢静脉、头部静脉。比较三组置管效果。结果:下肢静脉组PICC置管疼痛评分低于上肢静脉组、头部静脉组,差异有统计学意义(P<0.05)。三组并发症总发生率比较,差异无统计学意义(P=0.383)。三组血红蛋白、血小板计数、血细胞比容水平比较,差异无统计学意义(P>0.05)。下肢静脉组直接胆红素、总胆红素、总胆汁酸、谷氨酰转移酶水平低于上肢静脉组、头部静脉组,差异有统计学意义(P<0.05)。结论:相较于上肢、头部静脉PICC置管,下肢静脉PICC置管能够减轻早产儿置管疼痛感,减少胆汁淤积风险,且不会增加不良反应。

预防性抗凝对大隐静脉射频闭合术后症状性静脉血栓栓塞的影响

目的探讨大隐静脉射频闭合术后使用预防性抗凝药物对症状性静脉血栓栓塞(VTE)的影响。方法回顾性选取2022年1至12月在浙江省人民医院血管外科行大隐静脉射频闭合术的1074例患者为研究对象,其中未接受口服预防性抗凝药物组(未接受抗凝治疗组)106例、接受利伐沙班10 mg抗凝治疗5 d组(预防性抗凝5 d组)762例、接受利伐沙班10 mg抗凝治疗10 d组(预防性抗凝10 d组)206例。比较3组患者术后1个月内VTE发生率和出血性事件发生率。结果未接受抗凝治疗组术后1个月内未发生VTE,预防性抗凝5 d组和预防性抗凝10 d组术后1个月内VTE发生率分别为0.52%(4/762)和0.49%(1/206),3组患者术后1个月内VTE发生率比较差异无统计学意义(P=0.593)。未接受抗凝治疗组和预防性抗凝5 d组术后1个月内未发生出血性事件;预防性抗凝10 d组术后出现血尿1例,发生率为0.49%(1/206),3组患者术后1个月内出血性事件发生率比较差异无统计学意义(P=0.191)。结论大隐静脉射频闭合术后预防性抗凝使用利伐沙班未能明显降低VTE发生率,但也不会增加出血风险。

不同恶性肿瘤患者舌下络脉特征的临床观察分析

目的:分析不同系统恶性肿瘤患者舌下络脉特征。方法:通过用舌下络脉采集装置收集217例恶性肿瘤患者和162例非肿瘤患者的舌下络脉图像,采用舌下络脉观察表从舌下络脉长度、宽度、颜色、形态及瘀斑瘀点5个方面进行人工判读,分析肿瘤组与非肿瘤组组间、不同系统肿瘤组间舌下络脉量化积分及各特征分级程度的差异。结果:肿瘤组舌下络脉积分明显高于非肿瘤组,差异有显著统计学意义(P<0.01),肿瘤组舌下络脉积分≤5分(正常)的占比(24.9%)明显低于非肿瘤组的占比(38.3%),≥10分(重度)的占比(22.1%)明显高于非肿瘤组的占比(13.0%)(P<0.05)。肿瘤组舌下络脉宽度、颜色、形态、瘀斑瘀点等特征与非肿瘤组相比,有显著性差异(P<0.05)。呼吸系统恶性肿瘤87.2%舌下络脉超过舌下肉阜与舌尖连线的3/5,消化和呼吸系统恶性肿瘤舌下络脉偏宽,颜色多为青紫、蓝紫、紫黑,络脉多迂曲粗张,瘀斑瘀点也明显多于内分泌系统、妇科恶性肿瘤组。结论:肿瘤患者和非肿瘤患者舌下络脉特征有显著性差异,不同系统的恶性肿瘤舌下络脉特征有显著性差异,提示观察舌下络脉对恶性肿瘤的筛查和鉴别有一定参考价值。

重症患者导管相关性血流感染的病原菌分布与影响因素分析

目的探讨重症患者导管相关性血流感染(catheter-related bloodstream infection,CRBSI)的病原菌分布及影响因素。方法回顾性分析2019年7月1日至2022年7月2日期间在简阳市人民医院重症医学科接受中心静脉置管患者的临床资料,依据患者是否发生中心静脉CRBSI分为CRBSI组与非CRBSI组。对CRBSI组患者行病原菌种类分析,同时比较两组临床资料信息,并将有统计学意义的变量纳入多因素Logistic回归分析,明确接受中心静脉置管患者发生CRBSI的危险因素,通过受试者工作特征曲线(ROC)构建重症患者发生CRBSI的预测模型。结果共纳入接受中心静脉置管患者293例,其中CRBSI组38例、非CRBSI组255例。38例CRBSI患者共检出病原菌52珠,其中革兰氏阳性菌占比50.00%(26/52),以金黄色葡萄球菌19.23%(10/52)、表皮葡萄球菌7.69%(4/52)为主;革兰氏阴性菌占比44.23%(23/52),以大肠埃希菌17.31%(9/52)、肺炎克雷伯杆菌13.46%(7/52)为主;真菌占比5.77%(3/52),均为白色念珠菌。CRBSI组年龄≥60岁、合并糖尿病、置管部位为股静脉或颈内静脉、静脉营养液输液、置管前应用抗菌药物者占比显著高于非CRBSI组;CRBSI组BMI、入院时APACHEⅡ评分显著高于非CRBSI组,置管时间显著长于非CRBSI组,P值均<0.05。多因素Logistic回归分析结果显示,年龄≥60岁、高BMI、合并糖尿病、入院时高APACHEⅡ评分、置管部位为股静脉或颈内静脉、置管时间长、输液类型为静脉营养液、置管前应用抗菌药物为重症患者发生CRBSI的危险因素。ROC分析表明,BMI、入院时APACHEⅡ评分、置管时间均能用于重症患者发生CRBSI的预测,曲线下面积分别为0.778、0.919、0.975(P<0.05)。结论重症患者中心静脉置管后CRBSI的病原菌以金黄色葡萄球菌、大肠埃希菌较为多见,同时CRBSI的发生与年龄、BMI、置管天数、置管部位等因素关系密切,临床治疗过程中应当予以关注。

舌下络脉的客观识别与颜色分类研究

目的探讨中医舌下络脉诊的颜色信息客观识别方法。方法结合计算机视觉,尝试利用紧凑型全卷积网络(CFCNs)和19种深度学习分类模型等算法进行研究,并设计双络脉矩形算法,作为舌下络脉分割识别和颜色信息提取的手段。结果应用“去除反光点+数据扩充+数据后处理”方法获取的舌底分割的精确率为0.9559,F1值为0.9473、mIoU值为0.9000,应用“去除反光点+语义分割舌体结果作为输入+数据扩充+后处理边缘膨胀腐蚀”方法获取的舌下络脉分割结果精确率为0.7784、F1值为0.7383、mIoU值为0.5851,均明显优于目前经典的或改进的U-net模型。舌下络脉颜色分类上,DenseNet161-bc-early_stopping分类模型的效果最佳,准确率达0.8037。结论深度学习方法对于识别中医舌下络脉颜色信息具有一定作用,可为中医舌下络脉诊的颜色量化检测技术研究提供新方法。

正念减压疗法在大隐静脉曲张伴睡眠障碍患者围术期中的应用效果

目的探究正念减压疗法在大隐静脉曲张伴睡眠障碍患者围术期中的应用效果。方法选取2020年1月—2022年6月收治的90例大隐静脉曲张伴睡眠障碍,采用随机数字表法随机将其分为试验组和对照组2组各45例。试验组围术期在常规治疗基础上给予正念减压疗法,对照组围术期给予常规治疗。比较2组入院当天和出院当天应对方式(采用简易应对方式问卷评估)、心理状态[采用焦虑自评量表(SAS)及抑郁自评量表(SDS)评估]和睡眠质量[采用匹兹堡睡眠质量指数量表(PSQI)评估],以及出院当天住院满意度。结果出院当天,2组积极应对评分、消极应对评分、SAS评分、SDS评分和PSQI评分均优于入院当天;试验组积极应对评分、消极应对评分、SAS评分、SDS评分、PSQI评分和住院满意度均优于对照组(P<0.05)。结论围术期实施正念减压疗法有助于改善大隐静脉曲张伴睡眠障碍患者应对方式、心理状态、睡眠质量,且患者住院满意度较高。

辽东半岛五龙金矿外围电性特征及找矿意义

辽东五龙金矿经过80余年的开采,矿山资源储备严重下滑,后备资源不足问题日益突出,亟需查明矿区深部和外围矿产资源。通过在v163号脉西北和东南两侧以及100号断裂南侧开展瞬变电磁法测量工作,构建了相应的二维和三维地电模型,分析了矿区低阻异常特征;结合前人研究成果,推断出金矿成因类型和下一步找矿方向。研究结果表明:v163号脉西北方向P0剖面上低阻区是由包括163号脉西北段的细粒闪长岩脉群引起的,属于石英脉型成矿的可能性较大;100号断裂南侧三维地电模型中的低阻区域与大孤顶子金矿矿化点相对应,该低阻区向北侧深部规模增大,异常未封闭,表明该区域北侧深部具有良好的找矿前景,值得进一步开展研究工作;v163号脉东南方向的三维地电模型中,低阻异常值在数量级上明显低于前二者,推测为蚀变带引起,后经工程验证孔揭露,该区域纵向存在多层不连续的硅化蚀变岩,最大厚度为41m,蚀变类型有硅化、绢云母化、绿泥石化以及不同程度的黄铁矿化。研究表明,五龙金矿不仅存在石英脉型金矿体,还有蚀变岩型金矿体,后者可能是该矿区下一个找矿的主要方向。