Thermal Analysis of Heat Transfer from Catheters and Implantable Devices to the Blood Flow

نویسندگانSeyed Ali Mirbozorgi,Seyed Abdollah Mirbozorgi
نشریهMicromachines
شماره صفحات1-17
شماره سریال12
شماره مجلد3
نوع مقالهFull Paper
تاریخ انتشار2021
رتبه نشریهISI
نوع نشریهالکترونیکی
کشور محل چاپسوئیس
نمایه نشریهISI،JCR،Scopus

چکیده مقاله

Implantable devices, ultrasound imaging catheters, and ablation catheters (such as renal denervation catheters) are biomedical instruments that generate heat in the body. The generated heat can be harmful if the body temperature exceeds the limit of almost 315 K. This paper presents a heat-transfer model and analysis, to evaluate the temperature rise in human blood due to the power loss of medical catheters and implantable devices. The dynamic of the heat transfer is modeled for the blood vessel, at different blood flow velocities. The physics and governing equations of the heat transfer from the implanted energy source to the blood and temperature rise are expressed by developing a Non-Newtonian Carreau–Yasuda fluid model. We used a Finite Element method to solve the governing equations of the established model, considering the boundary conditions and average blood flow velocities of 0–1.4 m/s for the flow of the blood passing over the implanted power source. The results revealed a maximum allowable heat flux of 7500 and 15,000 W/m2 for the blood flow velocities of 0 and 1.4 m/s, respectively. The rise of temperature around the implant or tip of the catheter is slower and disappeared gradually with the blood flow, which allows a higher level of heat flux to be generated. The results of this analysis are concluded in the equation/correlation T = 310 + H 3000 1 + e

لینک ثابت مقاله

tags: implantable devices; catheters; ultrasound imaging; blood flow; heat transfer; thermal analysis; numerical analysis; non-Newtonian fluid