Title :
A study of the heating of plaque during an intravascular procedure
Author_Institution :
Dept. of Mech. Eng., Florida Int. Univ., Miami, FL, USA
Abstract :
In invasive techniques such as laser angioplasty and intravascular ultrasonography, there is a source of heat inside the vascular system that is being released/dissipated by the inserted device. The transfer of heat from this source to the plaque deposited on the walls of the artery has been studied numerically. The model considers the transient conduction and the absorption of heat through the plaque. The variation of thermophysical properties is also included in the analysis. It was found that the temperature distribution depends significantly on the type of plaque and the power level. The maximum temperatures at power levels of 0.4, 2,4 and 10 W in calcified plaque were 56.2, 130.8, 223.6 and 502 degrees C respectively.
Keywords :
biomedical ultrasonics; biothermics; laser applications in medicine; physiological models; 0.4 to 10 W; 56.2 to 502 degC; calcified plaque; heat absorption; heat transfer; inserted device; intravascular procedure; intravascular ultrasonography; invasive techniques; laser angioplasty; plaque heating; power level; temperature distribution; thermophysical properties variation; transient conduction; Absorption; Angioplasty; Arteries; Heat transfer; Heating; Laser modes; Numerical models; Power system modeling; Temperature distribution; Ultrasonography;
Conference_Titel :
Biomedical Engineering Conference, 1993., Proceedings of the Twelfth Southern
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0976-6
DOI :
10.1109/SBEC.1993.247447
