RESUMO
This paper presents a digital conductance catheter system based on FPGA (Field Programmable Gate Arrays) to measure real time ventricular volumes for experimental use. The system performance is realized in three stages: a) conductance measurements using a well-known set of resistance connected to each catheter section; b) volumes measurements in glass containers of well-known geometry that contain a solution with a resistivity similar to the blood, and c) comparison between the previous analog conductance catheter system and this novel FPGA based system.
Assuntos
Catéteres , Sistemas Computacionais , Cateterismo , Simulação por Computador , Condutividade Elétrica , Eletrodos , Desenho de Equipamento , Vidro , Humanos , Teste de Materiais , Modelos Cardiovasculares , Modelos Estatísticos , Monitorização Fisiológica/métodos , Reprodutibilidade dos TestesRESUMO
Successful management of cardiac heart failure requires a multifactorial approaching. It has been suggested that implantable hemodynamic long-term monitoring can improve patient care. This paper presents an analysis of the hemodynamic parameters commonly recorded, the most used implantable devices and their associated clinical trials. Newly implantable miniaturized sensors and devices are revisited. Finally, a newly implantable conductance-catheter based system is presented. The feasibility to realise volume and pressure measurements in the human left ventricular cavity using an implantable conductance-catheter based system is evaluated. It has the advantage to obtain LV signals continuously. In addition, it allows to realise maneuvers such as calibration and LV function by telemetry being avoiding patient hospitalizations. The rapid advances in device monitoring capabilities could change the new paradigm of the heart disease management.
