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

作　　者：Adelaide Nespoli Davide Ninarello Enrico Bassani Villiam Dallolio 

机构地区：[1]Institute of Condensed Matter Chemistry and Technologies for Energy,National Research Council(CNR-ICMATE),23900 Lecco,Italy [2]Promev Srl,23900 Lecco,Italy

出　　处：《Bio-Design and Manufacturing》2023年第5期536-549,共14页生物设计与制造（英文）

基　　金：Funding was provided by Regione Lombardia(Grant No.BANDO MISE Brevetti+N.BRE0000721).

摘　　要：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.,20-22℃)to 32℃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.

关 键 词：SUTURE NITI Shape memoryalloys SUTURING Medical device 

分 类 号：R318.08[医药卫生—生物医学工程]