Title :
Conductimetric intraventricular volume: analysis of the current distribution
Author :
Herrera, M.C. ; Olivera, J.M. ; Ruiz, E. ; Alentinuzzi, M. E V
Author_Institution :
Lab. Bioingenieria, FACET-UNT, Tucuman, Argentina
Abstract :
A source of error using a conductance catheter is the current distribution in the structures that surround the ventricle. The authors have developed an electrical model to interpret these changes when intraventricular volume is intended to be measured. To evaluate the model, experiments were made in 5 dogs injecting solutions in the circulation with different saline concentrations and at different temperatures. The results indicate that the total conductance (Gt) rises when the concentration and the temperature are increased and the authors´ electrical model can describe this behavior and can also evaluate the current distribution in the whole system
Keywords :
bioelectric phenomena; biomedical measurement; cardiology; current distribution; measurement errors; physiological models; volume measurement; conductance catheter; conductimetric intraventricular volume; current distribution analysis; dogs; electrical model; error source; intraventricular volume; medical measurement errors; saline concentration; solutions injection; total conductance; whole system current distribution; Arteries; Blood; Catheters; Conductivity; Current distribution; Dogs; Electric variables measurement; Electrical resistance measurement; Electrocardiography; Laboratories; Temperature; Temperature distribution; Volume measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.412080
