A novel parameter for predicting arterial fusion and ablation in finite element models

Douglas Fankell; Eric Kramer; Kenneth Taylor; Virginia Ferguson; Mark E. Rentschler

doi:10.1117/12.2080902

11 March 2015 A novel parameter for predicting arterial fusion and ablation in finite element models

Douglas Fankell, Eric Kramer, Kenneth Taylor, Virginia Ferguson, Mark E. Rentschler

Proceedings Volume 9326, Energy-based Treatment of Tissue and Assessment VIII; 93260C (2015) https://doi.org/10.1117/12.2080902
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

Tissue fusion devices apply heat and pressure to ligate or ablate blood vessels during surgery. Although this process is widely used, a predictive finite element (FE) model incorporating both structural mechanics and heat transfer has not been developed, limiting improvements to empirical evidence. This work presents the development of a novel damage parameter, which incorporates stress, water content and temperature, and demonstrates its application in a FE model. A FE model, using the Holzapfel-Gasser-Ogden strain energy function to represent the structural mechanics and equations developed by Cezo to model water content and heat transfer, was created to simulate the fusion or ablation of a porcine splenic artery. Using state variables, the stresses, temperature and water content are recorded and combined to create a single parameter at each integration point. The parameter is then compared to a critical value (determined through experiments). If the critical value is reached, the element loses all strength. If the value is not reached, no change occurs. Little experimental data exists for validation, but the resulting stresses, temperatures and water content fall within ranges predicted by prior work. Due to the lack of published data, additional experimental studies are being conducted to rigorously validate and accurately determine the critical value. Ultimately, a novel method for demonstrating tissue damage and fusion in a FE model is presented, providing the first step towards in-depth FE models simulating fusion and ablation of arteries.

Citation Download Citation

Douglas Fankell, Eric Kramer, Kenneth Taylor, Virginia Ferguson, and Mark E. Rentschler "A novel parameter for predicting arterial fusion and ablation in finite element models", Proc. SPIE 9326, Energy-based Treatment of Tissue and Assessment VIII, 93260C (11 March 2015); https://doi.org/10.1117/12.2080902

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Arteries

Tissues

Mechanics

Surgery

Finite element methods

Fusion energy

Collagen

Show All Keywords

Keywords/Phrases

Search In:

Publication Years