Assessment of heart valve frame manufactured by laser powder bed fusion

Assessment of heart valve frame manufactured by laser powder bed fusion
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激光粉末床融合制造的心脏瓣膜框架的评估

DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
M. Bellin
M. Bellin
中科院分区：
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文献类型：
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作者：
Xiao Zhao;N. Bressloff;M. Bellin

文献摘要

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通常，替换心脏瓣膜的框架是用激光切割制造的。虽然这种方法限制了新概念的范围，但增材制造使其成为可能。为此，在SAPIEN 3框架的基础上，研究了激光粉末床熔合（LPBF）制造心脏瓣膜框架的可行性。本研究使用不锈钢粉末，证明了成功制造0.4 mm截面尺寸框架的可行性。虽然几何精度和表面质量需要改进，但实现了0.5%的低孔隙率，并且框架可以成功卷曲和扩展而没有任何破损。
Typically, the frames of replacement heart valves are manufactured by laser cutting. Whilst this method limits the scope for novel concepts are made possible by additive manufacturing. With this in mind, the feasibility of manufacturing heart valve frames by laser powder bed fusion (LPBF) has been investigated based the SAPIEN 3 frame. Using stainless steel powder, this study has demonstrated the feasibility of successfully manufacturing frames with 0.4 mm cross-sectional dimensions. Although geometric accuracy and surface quality need to be improved, a low porosity of 0.5% was achieved and the frames could be successfully crimped and expanded without any breakages.