Thermal behavior of tissues having different porosities during continuous CO2 laser irradiation

Abstract

The using of CO2 laser in operation room has been intensified in last few decades, requiring deep insight into the thermal behavior of tissue subjected to laser beam. Using CO2 laser as a scalpel is studied here, with temperature distribution, char depth and velocity of ablation obtained numerically for different porosities. A moving finite element mesh has been used with an iterative solution procedure based on a band matrix solver. The effect of porosity for different type of tissues is studied for lasers with different power intensities. Some conclusions have been reached; a reduction in char layer depth can be obtained as power intensity increase; also for the same laser power as porosity increases the char depth may decrease. A good agreement of the results with typical experimental data is obtained which verifies the proposed method of solution.