Design and performance of double-layered artificial chordae.

IF 5.6 1区 医学 Q1 MATERIALS SCIENCE, BIOMATERIALS Regenerative Biomaterials Pub Date : 2024-06-27 eCollection Date: 2024-01-01 DOI:10.1093/rb/rbae076
Tingchao Zhang, Yichen Dou, Yang Li, Rifang Luo, Li Yang, Weiwei Zhang, Yunbing Wang, Xingdong Zhang
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Abstract

Surgical repair with artificial chordae replacement has emerged as a standard treatment for mitral regurgitation. Expanded polytetrafluoroethylene (ePTFE) sutures are commonly employed as artificial chordae; however, they have certain limitations, such as potential long-term rupture and undesired material/tissue response. This study introduces a novel approach to artificial chordae design, termed the New Artificial Chordae (NAC), which incorporates a double-layered structure. The NAC comprises a multi-strand braided core composed of ultra-high molecular weight polyethylene (UHMWPE) fibers as the inner core, and an outer tube made of hydrophobic porous ePTFE. Compared to traditional ePTFE sutures, NAC exhibits increased flexibility, enhanced tensile strength, longer elongation and improved fatigue resistance. Moreover, NAC exhibits a more hydrophobic surface, which contributes to enhanced hemocompatibility. The study also includes in vivo investigations conducted on animal models to evaluate the biocompatibility and functional efficacy of the artificial chordae. These experiments demonstrate the enhanced durability and biocompatibility of the NAC, characterized by improved mechanical strength, minimal tissue response and reduced thrombus formation. These findings suggest the potential application of NAC as a prosthetic chordae replacement, offering promising prospects to address the limitations associated with current artificial chordae materials and providing novel ideas and approaches for the development of sustainable and biocompatible regenerative biomaterials.

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双层人工腱鞘的设计和性能。
人工腱膜置换手术修复已成为二尖瓣反流的标准治疗方法。通常使用膨体聚四氟乙烯(ePTFE)缝合线作为人工腱膜,但这种缝合线有一定的局限性,如可能出现长期破裂以及材料/组织反应不理想。本研究介绍了一种新的人工腱膜设计方法,即新型人工腱膜(NAC),它采用了双层结构。NAC 由超高分子量聚乙烯(UHMWPE)纤维组成的多股编织核心和疏水性多孔 ePTFE 制成的外管构成。与传统的 ePTFE 缝合线相比,NAC 具有更高的柔韧性、更强的拉伸强度、更长的伸长率和更好的抗疲劳性。此外,NAC 的表面疏水性更强,有助于提高血液相容性。研究还包括在动物模型上进行的体内调查,以评估人工腱鞘的生物相容性和功能功效。这些实验证明,NAC 的耐久性和生物相容性得到了增强,其特点是机械强度提高,组织反应最小,血栓形成减少。这些研究结果表明,NAC 具有作为人工腱膜替代物的应用潜力,为解决目前人工腱膜材料的局限性提供了广阔的前景,并为开发可持续和生物相容性再生生物材料提供了新的思路和方法。
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来源期刊
Regenerative Biomaterials
Regenerative Biomaterials Materials Science-Biomaterials
CiteScore
7.90
自引率
16.40%
发文量
92
审稿时长
10 weeks
期刊介绍: Regenerative Biomaterials is an international, interdisciplinary, peer-reviewed journal publishing the latest advances in biomaterials and regenerative medicine. The journal provides a forum for the publication of original research papers, reviews, clinical case reports, and commentaries on the topics relevant to the development of advanced regenerative biomaterials concerning novel regenerative technologies and therapeutic approaches for the regeneration and repair of damaged tissues and organs. The interactions of biomaterials with cells and tissue, especially with stem cells, will be of particular focus.
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