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TECHNICAL PAPERS: Fluids/Heat/Transport

Thermal Damage Prediction for Collagenous Tissues Part I: A Clinically Relevant Numerical Simulation Incorporating Heating Rate Dependent Denaturation*

[+] Author and Article Information
Alptekin Aksan

Center for Engineering in Medicine and Department of Surgical Services, Massachusetts General Hospital, Harvard Medical School, and Shriners Hospital for Children, Boston, MA 02114

John J. McGrath

Aerospace and Mechanical Engineering Department, University of Arizona, Tucson, AZ 85721

David S. Nielubowicz

Pontiac Structural Durability Laboratories, General Motors Corporation, Pontiac, MI 48341

J Biomech Eng 127(1), 85-97 (Mar 08, 2005) (13 pages) doi:10.1115/1.1835355 History: Received February 29, 2004; Revised August 09, 2004; Online March 08, 2005
Copyright © 2005 by ASME
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References

Figures

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The two-dimensional control volume, and the schematics of bipolar and monopolar radio frequency probes
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Characteristic DSC thermogram of a rabbit patellar tendon sample
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Transition peak temperature, Tmax, as a function of scanning rate, r. (Data for rat tail tendon are from Miles et al. 22.)
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Peak width at half height, ΔT, as a function of scanning rate, r. (Data for rat tail tendon is from Miles et al. 22 and data for porcine lens capsule (PLC) is from Miles 51.)
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Effect of incorporating heating rate dependent denaturation in the model on the resultant temperature and thermal damage profiles
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Comparison of FEM simulation with the exact solution
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Instantaneous temperature distribution (A) and accumulated thermal damage (B) during monopolar heating at a sweep speed of 2 mm/s. (P=10 W/m3,r0=1 mm,h=500 W/m2 K.)
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Thermal damage accumulation in the tissue (A) (h=500 W/m2 K,ω=r0=0.001 m,V=0); (B) (h=500 W/m2 K,ω=r0=0.001 m,V=0.002 m/s); (C) (h=500 W/m2 K,ω=r0=0.001 m,V=0.004 m/s). (E0: laser (L) surface heat flux [W/m2 ], q″ : bipolar (BP) surface heat flux [W/m2 ], P: monopolar (MP) Joule heating [W].)
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Thermal damage accumulation in the tissue (A) (h=50 W/m2 K,ω=r0=0.001 m,V=0), (B) (h=50 W/m2 K,ω=r0=0.001 m,V=0.002 m/s), (C) (h=50 W/m2 K,ω=r0=0.001 m,V=0.004 m/s). (E0: laser (L) surface heat flux [W/m2 ], q″ : bipolar (BP) surface heat flux [W/m2 ], P: monopolar (MP) Joule heating [W].)
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Thermal damage accumulation on the tissue surface (A) (h=50 W/m2 K,ω=r0=0.001 m,V=0), (B) (h=50 W/m2 K,ω=r0=0.001 m,V=0.002 m/s), (C) (h=50 W/m2 K,ω=r0=0.001 m,V=0.004 m/s). (E0: laser (L) surface heat flux [W/m2 ], q″ : bipolar (BP) surface heat flux [W/m2 ], P: monopolar (MP) Joule heating [W].)

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