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Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery

Resulting from the restricted size of incisions and confined surgical space, the existing rigid and slender minimally invasive surgery (MIS) instruments are inefficient in providing an optimum articulation to handle certain minimally invasive surgery tasks. Thus, developments of novel articulating a...

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Autores principales: Wang, HaoChen, Cui, Saihui, Niu, Fuzhou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9577030/
https://www.ncbi.nlm.nih.gov/pubmed/36267447
http://dx.doi.org/10.3389/fbioe.2022.1016350
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author Wang, HaoChen
Cui, Saihui
Niu, Fuzhou
author_facet Wang, HaoChen
Cui, Saihui
Niu, Fuzhou
author_sort Wang, HaoChen
collection PubMed
description Resulting from the restricted size of incisions and confined surgical space, the existing rigid and slender minimally invasive surgery (MIS) instruments are inefficient in providing an optimum articulation to handle certain minimally invasive surgery tasks. Thus, developments of novel articulating actuators are of urgent requirement. In this paper, with the aim to enhance the flexibility and maneuverability of surgical instruments in diverse minimally invasive surgery scenarios, two types of spring-roll dielectric elastomer (DE) actuators, namely linear-type and bending-type, are proposed. The actuators’ parameters were optimized and calibrated using a novel step-by-step procedure, based on the characterization and modeling of dielectric elastomer material (VHB 4905). Critical design factors including dimensions of the core spring, the pre-stretch ratio of the dielectric elastomer, and the excitation level of the actuator were identified, while the boundary conditions for the modeling of the actuator were derived from the requirements of minimally invasive surgery applications. The dielectric elastomer actuators’ deformation behavior and force response were analyzed both theoretically and experimentally, and the results from the two approaches were in good agreement. The linear-type actuator could achieve a maximum strain of 29% and a blocking force up to 5.05 N, while the bending-type actuator could achieve angulation over 70° and a blocking force of up to 0.22 N. The proposed actuators are lightweight, compact, and cost-effective, which could provide novel design inspiration for minimally invasive surgery instruments.
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spelling pubmed-95770302022-10-19 Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery Wang, HaoChen Cui, Saihui Niu, Fuzhou Front Bioeng Biotechnol Bioengineering and Biotechnology Resulting from the restricted size of incisions and confined surgical space, the existing rigid and slender minimally invasive surgery (MIS) instruments are inefficient in providing an optimum articulation to handle certain minimally invasive surgery tasks. Thus, developments of novel articulating actuators are of urgent requirement. In this paper, with the aim to enhance the flexibility and maneuverability of surgical instruments in diverse minimally invasive surgery scenarios, two types of spring-roll dielectric elastomer (DE) actuators, namely linear-type and bending-type, are proposed. The actuators’ parameters were optimized and calibrated using a novel step-by-step procedure, based on the characterization and modeling of dielectric elastomer material (VHB 4905). Critical design factors including dimensions of the core spring, the pre-stretch ratio of the dielectric elastomer, and the excitation level of the actuator were identified, while the boundary conditions for the modeling of the actuator were derived from the requirements of minimally invasive surgery applications. The dielectric elastomer actuators’ deformation behavior and force response were analyzed both theoretically and experimentally, and the results from the two approaches were in good agreement. The linear-type actuator could achieve a maximum strain of 29% and a blocking force up to 5.05 N, while the bending-type actuator could achieve angulation over 70° and a blocking force of up to 0.22 N. The proposed actuators are lightweight, compact, and cost-effective, which could provide novel design inspiration for minimally invasive surgery instruments. Frontiers Media S.A. 2022-10-04 /pmc/articles/PMC9577030/ /pubmed/36267447 http://dx.doi.org/10.3389/fbioe.2022.1016350 Text en Copyright © 2022 Wang, Cui and Niu. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Bioengineering and Biotechnology
Wang, HaoChen
Cui, Saihui
Niu, Fuzhou
Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
title Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
title_full Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
title_fullStr Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
title_full_unstemmed Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
title_short Optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
title_sort optimization and demonstration of two types of spring-roll dielectric elastomer actuators for minimally invasive surgery
topic Bioengineering and Biotechnology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9577030/
https://www.ncbi.nlm.nih.gov/pubmed/36267447
http://dx.doi.org/10.3389/fbioe.2022.1016350
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