Shape Memory Alloy Helical Microrobots with Transformable Capability towards Vascular Occlusion Treatment.
Research (Wash D C)
; 2022: 9842752, 2022.
Article
in En
| MEDLINE
| ID: mdl-35928304
ABSTRACT
Practical implementation of minimally invasive biomedical applications has been a long-sought goal for microrobots. In this field, most previous studies only demonstrate microrobots with locomotion ability or performing a single task, unable to be functionalized effectively. Here, we propose a biocompatible shape memory alloy helical microrobot with regulative structure transformation, making it possible to adjust its motion behavior and mechanical properties precisely. Especially, towards vascular occlusion problem, these microrobots reveal a fundamental solution strategy in the mechanical capability using shape memory effect. Such shape-transformable microrobots can not only manipulate thrust and torque by structure to enhance the unclogging efficiency as a microdriller but also utilize the high work energy to apply the expandable helical tail as a self-propulsive stent. The strategy takes advantage of untethered manipulation to operate microsurgery without unnecessary damage. This study opens a route to functionalize microrobots via accurate tuning in structures, motions, and mechanical properties.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Research (Wash D C)
Year:
2022
Document type:
Article
Affiliation country:
China