Problems of impedance cardiography
- 78 Downloads
the waveforms measured by an impedance cardiograph are affected not only by the change of blood volume in the aorta but also by that in various organs such as the heart and lungs.
the impedances measured by a pair of small electrodes separated by a short distance give useful information about the region in the vicinity of the electrodes
much valuable information will be available, if the relationships between the measurement results and the pulsatile blood flow are understood, and
by choosing an appropriate electrode arrangement, we may get much useful information about the blood circulation in the organs we want to investigate
KeywordsImpedance cardiograph Impedance waveforms Potential distribution
Unable to display preview. Download preview PDF.
- Kanai, H., Sakamoto, K. andMiki, M. (1976) Impedance of blood; the effects of red cell orientation. Proceedings of the 11th ICMBE, Ottawa, Canada, 238–239.Google Scholar
- Sakamoto, K. andKanai, H. (1978) Electrical charac-teristics of flowing blood.Japan. J. MEBE,16, 45–52.Google Scholar
- Edgerton, R. H. (1974) Conductivity of sheared suspensions of ellipsoidal particles with application to blood flow.IEEE Trans.,BME-21-1, 33–43.Google Scholar
- Schwan, J. P. (1959) Alternating current spectroscopy of biological substances. Proceedings of theIRE, 10, 1845–1855.Google Scholar
- Hill, D. W. andLowe, H. J. (1973) The use of the electrical-impedance technique for the monitoring of cardiac output and limb blood flow during anaesthesia.Med. & Biol. Eng.,11.Google Scholar
- Geddes, L. A. andBaker, L. E. (1967) The specific resistance of biological material.Med. & Biol. Eng.,5, 271–293.Google Scholar