Phenomenological tissue fracture modeling for an Endoscopic Sinus and Skull Base Surgery training system based on experimental data. (June 2019)

• Record Type: Journal Article
• Authors: Sadeghnejad, Soroush; Farahmand, Farzam; Vossoughi, Gholamreza; Moradi, Hamed; Mousa Sadr Hosseini, S.
• Is Part Of: Medical engineering & physics. Volume 68(2019)
• Page Start: 85
• Page End: 93
• Publication Date: 2019-06
• Subjects: ESSS training simulator -- Phenomenological model -- Fracture force -- Sino-nasal tissue -- Deformation -- Cutting -- Kelvin–Voigt model -- Rate dependency; Biomedical engineering -- Periodicals; Biomedical Engineering -- Periodicals; Physics -- Periodicals; Génie biomédical -- Périodiques; Biomedical engineering; Electronic journals; Periodicals; 610.28
• DOI: 10.1016/j.medengphy.2019.02.004
• Languages: English
• ISSNs: 1350-4533

Abstract

Highlights: A phenomenological tissue fracture model of sino-nasal tissue during surgical tool penetration in Endoscopic Sinus and Skull Base Surgery (ESSS) is presented. Tool insertion into coronal orbital floor (COF) was modeled in terms of tissue deformation, fracture and cutting. Deformation phase behavior was characterized using modified Kelvin–Voigt model. The tissue cutting phase was simulated to determine the force required to slice through the COF. The presented model may find application in Virtual Reality-based ESSS simulations of otolaryngology/ophthalmology surgical procedures. Abstract: The ideal simulator for Endoscopic Sinus and Skull Base Surgery (ESSS) training must be supported by a physical model and provide repetitive behavior in a controlled environment. Development of realistic tissue models is a key part of ESSS virtual reality (VR)-based surgical simulation. Considerable research has been conducted to address haptic or force feedback and propose a phenomenological tissue fracture model for sino-nasal tissue during surgical tool indentation. Mechanical properties of specific sino-nasal regions of the sheep head have been studied in various indentation and relaxation experiments. Tool insertion at different indentation rates into coronal orbital floor (COF) tissue is modeled as a sequence of three events: deformation, fracture, and cutting. The behavior in the deformation phase can be characterized using a non-linear, rate-dependent modified Kelvin–Voigt model. A non-linear model for tissue behavior prior to the fracture point is presented. The overall model shows a non-positive dependency of maximum force on tool indentation rate, which indicates faster tool insertion velocity decreases the maximum final fracture force. The tissue cutting phase has been modeled to characterize the force necessary to slice through the COF. The proposed model in this study can help develop VR-based ESSS base simulators in otolaryngology and ophthalmology surgeries. Such simulators are useful in preoperative planning, accurate surgical simulation, intelligent robotic assistance, and treatment applications.