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Bio-Design and Manufacturing  2023 Vol.6 No.5 P.536549

http://doi.org/10.1007/s42242-023-00254-2


Proof of concept of a self-tightening needle-less suture using a NiTi shape memory alloy


Author(s):  Adelaide Nespoli, Davide Ninarello, Enrico Bassani & Villiam Dallolio

Affiliation(s):  Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council (CNR-ICMATE), 23900 Lecco, Italy; more

Corresponding email(s):   adelaide.nespoli@cnr.it

Key Words:  Suture, NiTi, Shape memory alloys, Suturing, Medical device


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Adelaide Nespoli, Davide Ninarello, Enrico Bassani & Villiam Dallolio . Proof of concept of a self-tightening needle-less suture using a NiTi shape memory alloy[J]. Journal of Zhejiang University Science D, 2023, 6(5): 536549.

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Abstract: 
Among surgical procedures, suturing is considered simple. However, in some situations, suturing is not easy or feasible. Here, we present proof of concept of a new self-tightening needle-less suture made of a niTi alloy. The new device is designed to overcome two demanding steps of traditional suturing: needle introduction and manual knotting. Our novel suture is composed only of a short niTi wire that is able to change shape by exploiting a thermoelastic phase transition. This shape change is achieved by increasing the temperature from that of the operating room (e.g., 2022 C) to 32 C using warm water. suturing consists of two steps: suture introduction, in which the suture is in an open configuration, and shape recovery (i.e., closed configuration). The closed configuration is maintained at human body temperature thanks to peculiar pseudoelastic properties of the niTi material. Finally, thermal and functional characterization verified the simplicity and effectiveness of the proposed device.

意大利Adelaide Nespoli等 | 使用镍钛形状记忆合金的自紧式无针缝合

本研究论文聚焦使用镍钛形状记忆合金的新型自紧式无针缝合。在外科手术中,缝合一般被认为是简单操作。然而,在某些情况下,缝合并不容易或不可行。在本文中,作者提出了一种由镍钛合金制成的新型自紧式无针缝合线,并进行了概念验证。新装置旨在克服传统缝合的两个苛刻步骤:针引入和手动打结。该新型缝合线仅由一根短镍钛合金线构成,其能够通过利用热弹性相变来改变形状。这种形状变化是通过使用温水将装置温度由手术室的温度(例如,20–22 °C)提高到32 °C来实现的。缝合包括两个步骤:缝合引入,即缝线处于打开状态;形状恢复(缝线闭合),由于镍钛合金材料的特殊伪弹性特性,在人体温度下本缝线将处于闭合状态。最后,本文验证了所提出装置的热和功能特性,证明了其简单性和有效性。

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