Autotomy and Regeneration of Appendages in Crustaceans:A Review

Autotomy of appendages is a self-protection mechanism in crustaceans,which is defined as the reflexive loss of a limb in response to predation,competition,or other environmental factors.Single-limb injuries were the most common among the species surveyed in the present study,and the chelicerae were the most frequently lost appendages.After autotomy,hormones and signaling pathways are altered.Loss of limbs can affect foraging efficiency,although cheliped loss may be compensated by shifting to alternative prey or using both motor and oral appendages.In heterogeneous species,the loss of the major chelae may affect the selectivity of feeding.Autotomy can affect crustacean growth by reducing size increases at molting and altering the timing of ecdysis.In commercial production,removing chelicerae is an effective strategy to reduce cannibalism,and production of soft-shell crabs can be increased via autotomy.After autotomy,a new limb will regrow through regeneration and molting.This process involves the regulation of hormones,regrowth of nerves,and a number of signaling pathways that include the Wnt/β-catenin signaling pathway and transforming growth factorβsignaling pathway.Crustaceans are somewhat different from vertebrates in terms of regeneration.This review provides theoretical guidance about autotomy and regeneration applied in artificial aquaculture,and we offer several suggestions for future research on autotomy and regeneration in crustaceans.

Coupling dynamic analysis of spacecraft with multiple cylindrical tanks and flexible appendages

This paper is mainly concerned with the coupling dynamic analysis of a complex spacecraft consisting of one main rigid platform, multiple liquid-filled cylindrical tanks, and a number of flexible appendages. Firstly, the carrier potential function equations of liquid in the tanks are deduced according to the wall boundary conditions. Through employ- ing the Fourier-Bessel series expansion method, the dynamic boundaries conditions on a curved free-surface under a low-gravity environment are transformed to general simple differential equations and the rigid-liquid coupled sloshing dynamic state equations of liquid in tanks are obtained. The state vectors of rigid-liquid coupled equations are composed with the modal coordinates of the relative potential func- tion and the modal coordinates of wave height. Based on the B ernoulli-Euler beam theory and the D＇Alembert＇s prin- ciple, the rigid-flexible coupled dynamic state equations of flexible appendages are directly derived, and the coordi- nate transform matrixes of maneuvering flexible appendages are precisely computed as time-varying. Then, the cou- pling dynamics state equations of the overall system of the spacecraft are modularly built by means of the Lagrange＇s equations in terms of quasi-coordinates. Lastly, the cou-piing dynamic performances of a typical complex spacecraft are studied. The availability and reliability of the presented method are also confirmed.

Dynamic response of liquid-filled rectangular tank with elastic appendages under pitching excitation

Nonlinear dynamics of liquid-filled rectangular tank with elastic appendages are studied. Based on the assumption of ideal fluid, the coupling dynamic equations of rigid tank, elastic appendages and liquid fuel are derived using H-O principle. In the case of pitch excitation, the modified potential function and wave height function are introduced to describe the moving boundary of fluid, then Galerkin＇s method is used to discretize the dynamic equations into ordinary differential equations. The natural frequencics of the coupling system are formulated in liquid depth, the length of the tank, etc. The formulae are confirmed by numerical simulations, which also show that the effects of liquid and elastic appendages on the attitude angular of rigid.

Network pharmacology-based approach to investigate the mechanisms of Yiyi Fuzi Baijiang Powder in the treatment of malignant tumors

Objective:To systematically investigate the main active components,targets,target-related diseases and action mechanism of Yiyi Fuzi Baijiang powder(YFBP)of Zhang Zhongjing,a Chinese physician of Eastern Han Dynasty of China(3 century A.D.)using the method of network pharmacology.Methods:The active components of YFBP were identified from several databases(TCMSP,TCM Database@Taiwan and TCMID).The potential active compounds were screened based on oral bioavailability and drug-like index in the TCMSP database.DrugBank,TCMSP,and TCMID database searches were performed to predict target-related diseases.Biological functions and KEGG pathway outcomes of all potential targets were analyzed using the DAVID database.Results:A total of 24 active compounds of YFBP,133 related targets,and 305 potential related diseases were obtained.These results showed that YFBP may treat inflammation,pain,and cancer.The functional enrichment analysis indicated that YFBP probably exerts its therapeutic effects by regulating neuroactive ligand-receptor interactions,the TNF signaling pathway,and the PI3K-Akt signaling pathway.Conclusion:This study provides preliminary confirmation that YFBP has the great potentials to treat inflammation,pain,and tumors,which supports Zhang Zhongjing’s original intention to treat intestinal carbuncle with ancient prescription YFBP,but also provides a scientific basis for its treatment in the malignant tumors.

Dahuang Fuzi decoction reduces inflammation levels and alleviates intestinal mucosal barrier damage in septic rats

Objective:To investigate the protective effect of Dahuang Fuzi Decoction(DHFZD),a traditional Chinese prescription,at alleviating sepsis-induced inflammation and gut barrier damage in rats.Methods:Forty clean-grade male Sprague-Dawley rats were divided randomly into three groups:normal control group(NCG,n?10),model control group(MCG,n?15)and DHFZD-treated group(DHFZDG,n?15).NCG rats were sham operated on and used as the controls,whereas MCG and DHFZDG rats were used to replicate the rat sepsis model using cecal ligation and puncture(CLP).The DHFZDG rats received DHFZD by gavage(4.5 mg/g of body weight)2 h prior to CLP and after its successful induction,while the NCG and MCG rats received equivalent amounts of sterilized water by gavage.All rat groups were starved and had free access to water.At 24 h post-experimental set up,the mortality of rats in each group was recorded,and peritoneal inflammation assessment and pathological changes related to the intestinal mucosal injury index(IMII)in the surviving rats were evaluated.D-lactic acid,tumor necrosis factor(TNF)-a,interleukin(IL)-6 and IL-10 peripheral blood concentrations,along with secretory immunoglobulin A(sIgA)in the intestinal mucosa were evaluated by enzyme-linked immunosorbent assays.Gut microbes were detected using 16S rRNA gene sequencing.Results:DHFZD reduced sepsis-related mortality in the rats.Moreover,it alleviated peritoneal inflammation and pathological changes according to the IMII.DHFZD reduced serum procalcitonin,TNF-a and IL-6 concentrations,but not the IL-10 concentration.It also reduced serum D-lactic acid and increased sIgA concentrations in intestinal mucosa.Notably,DHFZDG restored gut microbiota diversity and regulated the decrease in Bacteroidetes induced by sepsis,compared with the MCG rats.Conclusion:DHFZDG may play a protective role in sepsis by alleviating sepsis-induced inflammation and gut barrier damage in rats.

Dynamics Modeling and Simulation of Autonomous Underwater Vehicles with Appendages

To provide a simulation system platform for designing and debugging a small autonomous underwater vehicle＇s （AUV） motion controller, a six-degree of freedom （6-DOF） dynamic model for AUV controlled by thruster and fins with appendages is examined. Based on the dynamic model, a simulation system for the AUV＇s motion is established. The different kinds of typical motions are simulated to analyze the motion performance and the maneuverability of the AUV. In order to evaluate the influences of appendages on the motion performance of the AUV, simulations of the AUV with and without appendages are performed and compared. The results demonstrate the AUV has good maneuverability with and without appendages.

Research progress on synergetic effects of Fuzi(Radix Aconiti Lateralis Preparata)and Tubeimu(Rhizoma Bolbostemmatis)/Gualou(Trichosanthes kirilowii Maxim)

The compatibility of Chinese herbs is the focus and the difficulty in traditional Chinese medicine research,and it has an important guiding role for clinical medicine.Some scholars believe that the Fuzi(Radix Aconiti Lateralis Preparata,FZ)compatibility with Tubeimu(Rhizoma Bolbostemmatis,TBM)/Gualou(Trichosanthes kirilowii Maxim,GL)does not meet the Chinese medicine theory of“eighteen incompatibilities”.However,this combination has been used many times in many clinical medications.This study reviewed the research progress of pharmacological effects of FZ,and FZ compatibility with TBM/GL,in order to correctly understand and apply the“eighteen incompatibilities”drugs,and provide a reference for further exploration of the combined application in clinical treatment.

Efficacy and safety of Mahuang Fuzi Xixin Decoction on sick sinus syndrome： Ameta – analysis

Objective： To evaluate the efficacy and safety of Mahuang Fuzi Xixin Decoction on sick sinus syndrome andprovide evidence for clinical practice. Methods： Randomized controlled trials of all the languages of MahuangFuzi Xixin Decoction on sick sinus syndrome were collected by computer search and manual retrieval. Theretrieval time was from January 2000 to January 2017. According to the inclusion and exclusion criteria, 2reviewers independently selected and extracted data, then evaluated the quality, cross-checked the information andevaluated the quality of menthodology. Through discussion or third reviewer to help solve the divergence, RevMan5.3 software was used to perform meta analysis. Results： A total of 7 documents （n = 612） were finally enrolled,with 358 in Mahuang Fuzi Xixin Decoction group （treatment group） and 254 in control group. Meta analysisshowed that the treatment （86.9%） was more effective than the control （70.1%）, the difference was statisticallysignificant （RR = 1.25, 95% CI：（1.15-1.37）, P 〈 0.001）; the treatment （17.0%） was safer than the control （49.8%）,the difference was statistically significant （RR=0.23,95% CI：（0.06-0.93）, P =0.04）. Conclusion： The existingclinical studies suggest that Mahuang Fuzi Xixin Decoction on sick sinus syndrome is effective and safe; due to thelimited quality of the enrolled documents, the above conclusions need more high-quality randomized controlledtrials to be verified.

Fuzi promoted the formation of myelin sheath in Schwann cells induced by high glucose

OBJECTIVE Diabetic peripheral neuropathy(DPN)is the cause of considerable morbidity and mortality indiabetic patients.The loss of nerve fibersis the main pathological characteristics of the DPN and the pathway of Oct6-Krox20 plays an important role in the formation of myelin sheath.In our previous study,we found that Fuzi(Radix aconite lateral ispreparata)could significantly improve the nerve conduction deficits and thermal hypoalgesia deficits in the diabetic rats,but the underlying molecular mechanisms have not been established.The aim of this study is to investigate the expression of Oct6,Krox20,myelin basic protein(Mbp)and myelin protein zero(Mpz)in Schwann cells and analyze the effect of Fuzi in the formation of myelin sheath.METHODS There were six groups in the study.In the control group,thecells weresupplemented with normal cell culture medium.In the mannitol group,the cells were fed with normal glucose plus mannitol.In the model group,the cells were supplemented with high glucose medium(75 mmol·L-1).In the other group,the cells weretreated with high glucose medium(75mmol·L-1)plus different concentrations of Fuzi(0.1,1.0 and 10.0μg·mL-1).After three days,real-time PCR was used to detect gene expression.RESULTS Compared with the control group,the model group showed lowerexpression of Oct6,Krox20,Mbp and Mpz.In comparison to the model group,Fuzi(0.1,1.0and 10.0μg·mL-1)increased the expression of Oct6,Krox20,Mbp and Mpz.CONCLUSION These results demonstrate that Fuzi enhances the protein of myelin sheath through impacting the pathway of Oct6-Krox20.

Clinical Study on Fuzi Lizhong Pill in Treating Salivation after Taking Clozapine for Schizophrenia

[Objectives]To observe the clinical effect of Fuzi Lizhong pills for salivation after taking clozapine in schizophrenia.[Methods]A total of 45 cases of schizophrenia patients with salivation after taking clozapine only were selected as the study subjects and randomly divided into two groups according to enrollment order.The control group(22 cases)was treated with propantheline bromide tablets and the treatment group(23 cases)were treated with Fuzi Lizhong pills combined with propantheline bromide tablets.Clinical effects and adverse reactions were compared between the two groups.Chinese medicine syndrome scores,scores of severe degree of salivation and levels of serum cholinesterase were compared between the two groups before treatment,after one-week treatment and after two-week treatment.[Results]The total clinical effective rate was 86.96%in the treatment group,higher than that of 59.09%in the control group(P<0.05).When compared with those before treatment,Chinese medicine syndrome scores of short breath and lack of strength,lassitude of spirit and somnolence,poor appetite,spontaneous sweating and dyspnea,and salivation as well as scores of salivation in Rating Scale for Extrapyramdal Side Effects(RSESE)and the severe degree of salivation in the two groups were decreased after 1 week and 2 weeks treatment(P<0.05),and levels of serum cholinesterase were increased(P<0.05).When compared with those in the control group after one-week and two-week treatment,Chinese medicine syndrome scores of short breath and lack of strength,lassitude of spirit and somnolence,poor appetite,spontaneous sweating and dyspnea,and salivation as well as scores of salivation in RSESE and the severe degree of salivation in the treatment group at the same period were lower(P<0.05),and level of serum cholinesterase was higher(P<0.05).There was no significant difference in the comparison of incidence of adverse reactions between the two groups(P>0.05).[Conclusions]Fuzi Lizhong pills combined with propantheline bromide tablets can improve clinical symptoms of schizophrenia patients with salivation after taking clozapine,and enhance level of serum cholinesterase and clinical effect.

Mahuang Xixin Fuzi decoction protects against ovalbumin-induced allergic rhinitis by inhibiting type 2 innate lymphoid cells in mice

Objective:As a traditional herbal formula,Mahuang Xixin Fuzi decoction(MXFD)has been used to treat allergic rhinitis(AR).It regulates the transcription factor GATA3 in T cells,blocks Th2 skewing and rebalances the Th1/Th2 immunity.Type 2 innate lymphoid cells(ILC2s)are closely associated with GATA3.However,it remains unknown whether ILC2s could be one mechanism through which MXFD acts.We sought to elucidate the efficacy and mechanism of action of this decoction in AR treatment.Methods:Forty C57BL/6J female mice were equally divided into control,model,loratadine-and MXFDtreated groups in random.AR was induced by ovalbumin(OVA),and then treatment with loratadine or MXFD was administered.AR scores were evaluated and compared before and after treatment.Pathological changes in the nasal mucosa and lung were observed using hematoxylin-eosin staining of tissue samples.Activation of ILC2 in nasal mucosa was assessed by immunofluorescence and quantitative polymerase chain reaction analysis.ILC2 cell count in lungs was measured by flow cytometry and levels of interleukin-(IL)4,IL-5 and IL-13 in serum were detected by ELISA.Results:The decoction alleviated the symptoms of AR in mice,improved vascular congestion and expansion,glandular hyperplasia and inflammatory cell infiltration in mouse nasal mucosa and slowly improved the interstitial pneumonia and lesions.Meanwhile,MXFD reduced the number and percentage of ILC2s in the nasal mucosa and lungs,downregulated the expression of GATA3 mRNA and RORa mRNA,and reduced the related inflammatory cytokine levels,including IL-4,IL-5 and IL-13.Conclusion:These data suggest that inhibition of ILC2s by MXFD may be an important means by which to treat AR.

Study on the mechanism of Fuzi in the treatment of allergic rhinitis based on network pharmacology and experimental validation

Objective:To study the key target genes and signaling pathways in the treatment of Allergic Rhinitis(AR)with Radix Aconiti Lateralis Preparata(aka Fuzi).Methods:The TCMPS and PubChem databases were used to screen the active ingredients and target genes of Fuzi using oral bioavailability and drug similarity as screening conditions,and the GeneCards database was used to screen the target genes of AR.The online tool Venny2.1 was used to screen the target genes of Fuzi for the treatment of Allergic Rhinitis;the STRING database was used to obtain the protein-protein interaction(PPI)network of drug-disease targets,and the key target genes were identified by the MCC algorithm.The potential biological processes and signaling pathways were identified by GO enrichment and KEGG enrichment analysis.Finally,animal experiments were conducted to demonstrate the therapeutic effect ofFuzi on Allergic Rhinitis.Results:The TCMSP,PubChem and GeneCards databases were used to screen the 21 active compound components of Fuzi and 68 potential therapeutic target genes of Fuzi for Allergic Rhinitis.PPI network analysis identified the top ten key target genes,namely:PTGS2,TNF,IL6,AKT1,ALB,STAT3,CCL2,CXCL8,VEGFA and JUN,GO functional and KEGG pathway enrichment analysis showed that the significantly enriched functions and pathways of Fuzi on Allergic Rhinitis were closely related to Allergic Rhinitis.Finally,animal experiments were conducted to verify that Fuzi is effective in the treatment of Allergic rhinitis.Conclusion:Increased expression of IL-6 and TNF-αin nasal mucosal tissues of patients with Allergic Rhinitis was positively correlated with indicators related to the disease activity of AllergicRhinitis.Fuzi ameliorated the inflammatory changes in mice with Allergic Rhinitis by inhibiting the activation of Toll-like signaling pathway in the nasal mucosa and decreasing the expression activity of IL-6 and TNF-α.

Therapeutic Analysis of Fuzi Lizhong Wan with Trimebutine in the Treatment of Diarrhea Type lrritable Bowel Syndrome

Objective:To evaluate the clinical efficacy ofFuzi Lizhong Wan and trimebutine in the treatment of diarrhea irritab1e bowel syndrome.Methods:A tota1 of 90 patients with diarrhea irritable Dow1 syndrome were divided intocontro1 group(n=45)and treatment group(n=45)using the random.number table method.Patients in the control group were po administered withtrimebutine 0.2 g.three time daily for 4 weeks.Patients in the treatment group were po administered with Fuzi Lizhong Wan 9 g,three time daily for 4 weeks on the basis of the control group.The clinical efficacy and the TCM symptom scores were evaluated after treatment.The serological indicators in two groups were compared before and after treatment.Results:After treatment,the clinica1 efficacy and the TCM symptom scores in treatment group were significantly 1ower than that in contro1 group(P<0.05).The 1evels of serological indicators in both groups improved significant1y,and those in the treatment group were better than the control group(P<0.05).Conclusion:Combined therapy of Fuzi Lizhong Wan and trimebutine in the treatment of diarrhea type irritable bowe1 syndrome has a significant effect,which canrelieve clinical symptom;and reduce visceral sensitivity,and improve leve1s of inflammatory and quality of life.So it is suggested to be applied.

心房颤动患者左心耳封堵术护理方案的构建

目的 构建一套科学、标准化、具有较强临床实践性且符合我国心房颤动(房颤)患者的左心耳封堵术护理方案。方法 于2022年1-6月,通过国内外文献回顾和半结构式访谈初步构建方案,对19名专家实施德尔菲函询完成方案调整,并结合层次分析法确定各指标权重系数。结果 2轮函询问卷有效回收率分别为95%和100%;专家权威系数分别为0.879和0.896。最终确立了6个一级指标,28个二级指标,50个三级指标构成的房颤患者左心耳封堵术护理方案。各指标重要性赋值均数为4.47~5.00,满分率为52.6%~100.0%,变异系数为0.00~0.16,肯德尔系数为0.202~0.327(P<0.001)。结论 构建的房颤患者左心耳封堵术护理方案可信且具科学性,能够为房颤患者左心耳封堵术护理实践提供参考。

Mechanism of Yiyi Fuzi Baijiang powder in treatment of ulcerative colitis on network pharmacology and m olecular docking

Objective:To explore the mechanism of Yiyi Fuzi Baijiang p owder in treatment of ulcerative colitis in Coix Lacryma-jobi based on network pharmacology and molecular docking technology.Methods:Search for Yiyi Fuzi Baijiang powder’s active ingredient by traditional Chinese medicine database and analysis platform system pharmacology,Genecards,Uniprot database and Cytoscape software were used to construct the active component-ulcerative colitis disease target network,and gene ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis was performed,Autodock Vina was used for molecular docking verification.Results:Quercetin,luteolin,kaempferol,chrysin,macroanol B,β-sitosterol,stigmasterol,deltoan and rhizoctonine may play a role in the treatment of ulcerative colitis.KEGG pathway enrichment analysis showed that Yiyi Fuzi Baijiang p owder mainly involved i nterleukin-17 signaling pathway and cancer pathway,among which the key targets were PTGS2,HSP90AA1 and CASP3 and had a good binding activity with 10 main active components.Conclusion:The treatment of ulcerative colitis by Yiyi Fuzi Baijiang p owder may be mainly through quercetin,luteolin,macroanol B,β-sitosterol and other chemical components involved in cancer pathway,i nterleukin-17 signaling pathway acting on PTGS2,HSP90AA1,CASP3 and other disease targets in response to inorganic substances,response to cytokines and other biological processes f actor receptor binding and other molecular functions to achieve the purpose of treating u lcerative colitis.

心脏磁共振对房颤患者左心房/左心耳血栓诊断价值的系统评价与Meta分析

目的 通过系统评价与Meta分析评估心脏磁共振(cardiac magnetic resonance, CMR)对心房纤颤(atrial fibrillation, AF)患者左心房/左心耳(left atrial/left atrial appendage, LA/LAA)血栓的诊断价值,并分析不同的成像序列下所形成的诊断效能之间的差异。材料与方法 从Pub Med、Embase、Web of Science、Cochrane Library、中国知网、万方和维普数据库查找关于经食道超声心动图(transesophageal echocardiography, TEE)或外科病理活检的方法检测AF患者LA/LAA结构内是否存在血栓的研究,同时比较CMR成像与其诊断效能上的差异,检索的时间为2000年至2022年。将这些文献分为四个类别:(1)CMR电影(cine-cardiac magnetic resonance, cine-CMR)成像;(2)对比增强磁共振血管造影(contrast enhanced magnetic resonance angiography, CE-MRA);(3)对比增强CMR(contrast enhanced CMR, CE-CMR)成像;(4)CMR。分别进行统计分析,提取相关的临床数据,利用Stata 17.0、Review Manager 5.3及Meta-Di Sc 1.4等专业数据分析应用软件对患者的医疗记录进行详细统计,并进一步对合并敏感度、特异度、阳性似然比、阴性似然比及诊断比值比的具体数值进行运算,最后绘制了受试者工作特征曲线,同时对曲线下面积(area under the curve,AUC)进行计算得出诊断效能大小。结果 共纳入11篇文献,包含868例患者。Meta分析结果显示,各成像方式的合并敏感度、特异度、阳性似然比、阴性似然比、诊断比值比、AUC值如下:cine-CMR分别为92%、93%、12.8、0.08、154、0.93;CE-MRA分别为91%、100%、476.4、0.09、5 044、0.99;CE-CMR分别为96%、100%、247.5、0.04、6 656、1.00;CMR分别为99%、99%、95.1、0.01、7 357、1.00。结论 CMR对AF患者LA/LAA血栓的诊断具备较高的诊断效能。

经食道超声心动图在卵圆孔未闭合并房颤患者左心耳容积和功能改变评估中的应用

目的 探讨经食道超声心动图在卵圆孔未闭合并房颤患者左心耳容积和功能改变评价中的应用价值。方法 选取卵圆孔未闭患者80例为研究对象,根据是否合并房颤分为房颤组(n=44)和非房颤组(n=36),另选取同期检查的健康者30例作为对照组。3组行经食道超声心动图检查。比较3组左心耳容积及功能变化情况。结果 房颤组及非房颤组患者左心耳最大容积(LAAV_(max))、左心耳最小容积(LAAV_(min))、左心耳开口最大面积(MA)、左心耳开口最大长径(MD)大于对照组,左心耳最大排空速度(LAAeV)及左心耳最大充盈速度(LAAfV)小于对照组,差异有统计学意义(P<0.05)。房颤组左心耳自发显影(SEC)患者的LAAV_(max)、LAAV_(min)、左心耳开口MA、左心耳开口MD大于非房颤组,LAAeV及LAAfV小于非房颤组,差异有统计学意义(P<0.05)。治疗后,房颤组的终点事件发生率高于非房颤组,差异有统计学意义(P<0.05)。结论 经食道超声心动图在卵圆孔未闭合并房颤患者左心耳容积和功能改变评价中的应用效果较好。合并房颤患者的左心耳功能较未合并房颤患者差。

经皮左心耳封堵术的争议与探索

经皮左心耳封堵术(LAAO)已成为不能耐受口服抗凝药的非瓣膜性心房颤动患者脑卒中预防的一种替代治疗策略。多项研究证实,LAAO预防血栓栓塞事件具有良好的安全性及有效性。随着国内外专家对LAAO逐渐认可,该技术在心房颤动患者脑卒中预防方面得到了迅速发展,但仍有许多问题值得深入探究。本文从LAAO对左心房结构和功能的影响、最佳的LAAO策略以及LAAO术后最佳的抗栓治疗等方面进行综述。

食道超声心动图辅助胸腔镜左心耳夹闭术在高栓塞和高出血风险心房颤动患者中的应用

目的探讨食道超声心动图辅助胸腔镜左心耳夹闭术在高栓塞和高出血风险心房颤动患者中的安全性和疗效。方法回顾性分析2021年11月~2023年5月14例高栓塞和高出血风险的心房颤动患者资料。均有脑梗死史,CHA2 DS2-VASc评分3~7分,(5.0±1.4)分;HAS-BLED评分3~4分,(3.3±0.5)分。两孔法胸腔镜手术,食道超声心动图辅助采用国产E-Clip左心耳闭合系统行左心耳夹闭术。结果全组手术均顺利完成,手术时间(39.6±7.7)min,术后总引流量(80.4±37.1)ml,引流管留置时间(26.0±2.5)h。14例随访3~21个月,中位时间8个月。经胸超声心动图显示左心耳夹闭完全,无残余漏,左心房内未见血栓形成。头颅CT未见新发脑梗死或出血灶。心电图提示窦性心律2例,12例仍为心房颤动。结论食道超声心动图辅助胸腔镜左心耳夹闭术能够完全夹闭左心耳,避免高栓塞和高出血风险心房颤动患者新发脑卒中,并对少数患者起到电隔离左心耳的作用而消除心房颤动。

基于STAR-CCM+的全附体潜艇水压场特性及附体影响性研究

潜艇航行引起的流场压强变化称为潜艇水压场,其特性常被应用于水雷,以实现目标探测,攻守兼备。考虑指挥台围壳、尾翼影响,以全附体艇体为研究对象,在验证性研究的基础上,基于粘流理论研究了潜艇水压场特性,揭示了附体对艇体表面、周围流场、水底流场的压强分布影响规律。结果表明:附体对艇体表面的压强分布影响显著,但影响范围局限于附体小区域,而对水底处的水压场影响仅在潜艇近底航行时才略显著,可见非近底航行工况下可忽略附体影响,实现潜艇水压场的快速预报;在研究近水面航行工况时,水面兴波对海底潜艇水压场的分布存在影响,具体影响潜艇水压场的峰值大小和位置等。