Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EXPERIMENTAL STUDY OF HEAT TRANSFER IN ENDOVENOUS LASER TREATMENT
Submission Author:
Jônatas Vicente , SC
Co-Authors:
Jônatas Vicente, Amir Antonio Martins Oliveira
Presenter: Jônatas Vicente
doi://10.26678/ABCM.COBEM2019.COB2019-1753
Abstract
The endovenous laser treatment (EVLA or EVLT) is a minimally invasive surgical technique for vein cauterization, which aims to interrupt the blood flow and eliminate varicose veins. This study presents an experimental investigation of the heat transfer mechanisms in this procedure, employing an artificial vein model. This model was manufactured with a polymer, molded in a cylindrical shape with a central orifice in the axial direction, which was filled with human blood during the experiments. To mimic the laser treatment in vivo, a laser fiber was driven through the interior of the vein model at a constant speed and temperature measurements were obtained with a series of thermocouples installed in the axial and radial direction. The data obtained showed an asymmetry in the temperature field and its magnitude was related to the following effects: (1) displacement of the fiber tip out of the vein's centerline during the test; (2) direct contact of the fiber tip with the vein wall, and (3) steam bubbles formed at the fiber tip moving upwards due to buoyancy.
Keywords
Endovenous laser treatment (EVLT), Heat transfer in biological systems, Bioengineering
