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pericardium
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  心包
    Trial on the Long-term Stability of Bovine Pericardium after Chemical Modified Effects and Evaluation on the Clinical Hemodynamics of Perfeot Bovine Valve and Its Long-term Follow-up Results
    牛心包材料化学改性后长期稳定性的实验性研究、以及Perfeot瓣的临床血流动力学评价和长期随访结果
短句来源
    The Follow-up Clinical Results of Perfeot Bovine Pericardium Valve
    Perfeot牛心包瓣临床随访研究
短句来源
    A Study on the Degradation of Bovine Pericardium in Vitro
    组织工程用牛心包材料体外降解规律的初步探索
短句来源
    Research on the Feature of 2,3-Butanediol Post-Treatment for Glutaraldehyde Tanned Bovine Pericardium
    2,3-丁二醇对牛心包机械性能影响的实验研究
短句来源
    Experimental Study of Acellular Bovine Pericardium as Ovine Pulmonary Artery Patch
    脱细胞牛心包羊肺动脉补片的实验研究
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  心包膜
    Preliminary Research for Constructing Tissue-engineered Epiderm with Acellular Bovine Pericardium as Scaffold
    以脱细胞牛心包膜为支架材料构建组织工程化表皮的初步研究
短句来源
    2. Test of tissue compatibility: After New Zealand rabbits were anesthetized, craniotomy was created in the bilateral temporoparietal bone. A elliptical piece of dura mater, measuring 1.0 X 0.8cm, was removed with the aid of a surgical microscope. The dural defect was then repaired with either polyporous silk membrane, SD-1 silk membrane, epoxide silk membrane or bovine pericardium.
    2.组织相容性实验:新西兰大白兔麻醉后,取额顶部正中切口,作双侧颞顶部开颅,在手术显微镜下,椭圆形剪除兔的硬脑膜和蛛网膜1.0×0.8cm,硬脑膜缺损处分别用环氧丝素膜、SD-1丝素膜、多孔丝素膜和牛心包膜修补。
短句来源
    The peak of the hydroxyls decreased significantly at the wave length of 1741.11 cm -1 in the Fourier infrared spectrum,which meaned that the content of the hydroxyls reduced. The peak of the amides shifted to the left,which meaned that structure of the bovine pericardium was compact.
    傅立叶红外光谱图 174 1 11cm- 1 处羧基 (CO OH- 1 )峰明显降低 ,表明羧基含量减少 ,且酰胺峰位左移 ,表明牛心包膜结构紧密 ;
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  “pericardium”译为未确定词的双语例句
    CT findings and measurement of normal pericardium in adults
    成人正常心包的CT观察与测量
短句来源
    The Morphological Study of Sandwich Amnion for Pericardium
    三明治羊膜代心包的形态学研究
短句来源
    (2) The transverse sinus of the pericardium was demonstrated in 15 cases (71.4%), manifesting as curve line or rhomboid space.
    (2) 横窦:71 .4 % 病例MRI 显示横窦,呈弧线或菱形腔隙。
短句来源
    ③It was demonstrated by HE staining the cell layer was rather completely covered along one side of PHAs/PU sheet,bovine pericardium and porcine heart valve,and 3~4 layer of cells were overlopped in some local region.
    ③HE染色显示PHAs/PU片和牛心包片、猪瓣瓣叶单侧有联结较完整的细胞层覆盖 ,局部有 3~ 4层重叠而成 ,牛心包片和猪瓣瓣叶上细胞与基质联结紧密。
短句来源
    In addition, as biological tissues having bioactive agents, cellular/acellular matrices (BP/ABP) of bovine pericardium (BP) were chemically modified by the direct coupling of L-arginine (Arg) or heparin (Hep) after glutaraldehyde (GA) cross-linking.
    作为生物活性制剂的生物组织,如牛的心外膜,由细胞组成的或者无细胞组成的(BP/ABP)间质,是在谷氨醛(GA)交叉连接后用直接复制L 精氨酸(Arg)或肝素(Hep)而进行化学修改而成.
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  pericardium
We investigated MC density in the pericardium and myocardium of rats in intact and experimental heart failure (HF) 24 h and 14, 28, and 60 days after two (at 24 h intervals) injections of Isoproterenol (IP) inducing necrosises in the myocardium.
      
In the fibrous layer of pericardium, the MC density was higher than in the myocardium and, for the intact rats, it amounted 48.6 ± 13.0 cells/mm2.
      
After 28 days, the MC density in pericardium was 2 times higher than in the intact sample (P >amp;lt; 0.01) and, at the same time, the density of cells of a different maturity degree (P >amp;lt; 0.05) was considerably increased.
      
The dynamic of behavior of the MC population of pericardium was corresponding to HF injury on functional parameters.
      
Immunolocalization of atrial natriuretic peptide in mast cells of human and rat pericardium
      
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Preliminary studies on the pulsatile and steady state flow performance of yak pericardium valve have been carried out. Comparative studies with the hydrodynamic data of current commercial valves, showed that yak pericardium valve met with the requirements of hydrodynamic performance considered suitable for clinical use.

本文就牦牛心包生物瓣的稳态试验和脉动流试验结果进行了初步的分析。与国内外商品生物瓣的同类型试验资料对比,可以认为牦牛心包瓣基本上是符合流体力学要求的生物瓣。

The bovine pericardial valves(BPVs) usually do not need anticoagulant therapy after implantation, but they are progessively failured in the heart and require reimplantation 5-10 years after their initial implantation. From February 1979 to January 1990,251 BPVS were implanted in 9.44 patients at Ren Ji Hospital, Shanghai Second Medical University. A total of two aortic and 20 mitral valves with primary tissue failure(PTF) were explanted at reoperation. Along with coexistent pathologic findings, calcification...

The bovine pericardial valves(BPVs) usually do not need anticoagulant therapy after implantation, but they are progessively failured in the heart and require reimplantation 5-10 years after their initial implantation. From February 1979 to January 1990,251 BPVS were implanted in 9.44 patients at Ren Ji Hospital, Shanghai Second Medical University. A total of two aortic and 20 mitral valves with primary tissue failure(PTF) were explanted at reoperation. Along with coexistent pathologic findings, calcification and tearing were the main causes of PTF of BPVs. Thc majority of sutures or stitch sites in valve were involved by varying degrees of wearing in surrounding cusp material, manifested by swelling and breakdown of cusp tissue with or without varyingc degree of calcification or tearing. Most of the valves had one of mere tearings, Collagen damage caused by mechanical stresses could be the precursor of calcification and tearing. On the basis of mechanical test, the tensileelastic modulus of glutaraldehyde treated bovine pericardium was be about 25 times greater than the compressive modulus. We observed severe compressive buckling in the samples taken from BPV. Examinations of the bend of bovine pericardium and the leaflet action of BPV have showed that the areas of sharp bending curvature were near the attachment of the leaflets to the stents, which correlated well with sites of leaflte tearing or calcification. The increased stresses resulted from the increased bending stiffness would ultimately lead to the observed leaflet tearing, calcification and eventual failure of the BPVs. The experiments indicated that collagen fiber disruption resulting from cyclic leaflet bending would be the main factor determinant of long-term durability of BPVs. We believe that the PTF is related to compressive buckling of the glutaraldehyde-treated BPVs. This analysis of the effect of mechanical stresses on PTF of BPVs enable us to help to improve the design of the BPVs and reduce the risk of potential PTF in patients, with valve replacement.

引起牛心包瓣原发性损坏的生理学和病理学因素与机械学因素同等重要。从我院再次手术中收集到的22只失效瓣膜来看,在瓣架尖端区和侧边区的损坏发生率分别占30.3%和36%,撕裂、磨损和钙化的发生率分别占25.8%、18%和31.6%。牛心包片的弯曲试验和牛心包瓣的显微镜观察表明,由于经戊二醛处理的牛心包片的拉伸弹性模量是压缩模量的25倍,因此当牛心包片弯曲变形时,弯曲内侧必然出现挤压屈服,并逐渐发展到楔状挤压。牛心包瓣临床失效的形式及其分布提示,瓣叶损坏主要是由于瓣叶在启闭活动过程中的这种弯曲挤压引起的。因此在改进牛心包瓣时,应考虑机械应力,特别是弯曲变形的应力对瓣膜损坏的影响。

The durabiliy of bioprosthetic heart valves is limited by the calcification of the valvular tissue. Our study on the endotelialization will most probably provide a promising solution to the problem. A prerequisite for endothelial cell lining is the quenching of the aldehydes released from glutaraldehyde - fixed materials. Our study indicates that the toxic effects of aldehydes from the pericardium fixed and preserved for over 6 months on bovine aortic endothelial cells are significantly reduced by L-glutamic...

The durabiliy of bioprosthetic heart valves is limited by the calcification of the valvular tissue. Our study on the endotelialization will most probably provide a promising solution to the problem. A prerequisite for endothelial cell lining is the quenching of the aldehydes released from glutaraldehyde - fixed materials. Our study indicates that the toxic effects of aldehydes from the pericardium fixed and preserved for over 6 months on bovine aortic endothelial cells are significantly reduced by L-glutamic acid treatment.

生物瓣材料表面人工形成单层内皮细胞可望成为生物瓣防钙化并延长其使用寿命的最有前途的方法之一,解除戊二醛的毒性作用是种植细胞在生物瓣表面存活的前提.用L-谷氨酸处理戊二醛固定保存6个月以上的牛心包材料,成功地接种了培养的血管内皮细胞,使生物瓣内皮细胞种植的进一步研究成为可能.

 
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