DocumentCode :
1872470
Title :
Noninvasive microwave technique for hemodynamic assessments
Author :
Gagarin, Ruthsenne ; Youn, Hyoung-sun ; Celik, Nuri ; Iskander, Magdy
Author_Institution :
Hawaii Center for Adv. Commun., Univ. of Hawaii, Honolulu, HI, USA
fYear :
2010
fDate :
11-17 July 2010
Firstpage :
1
Lastpage :
4
Abstract :
Pulmonary edema, accumulation of fluid in the lungs is often measured and analyzed after medical and surgical procedures, since pulmonary edema is commonly linked to cases of congestive heart failure (CHF) and kidney failures. Like pulmonary edema, hemodynamic assessments do not occur until after an acute cardiac episode. Early detection of pulmonary edema and routine monitoring of cardiac functions such as cardiac output (CO) the product of stroke volume and heart rate, would be beneficial for surgical patients as well as others suffering from acute cardiac and pulmonary illnesses. Available diagnostic tools such as the Pulmonary Artery Catheterization are invasive and diagnostic techniques such as Magnetic Resonance Imaging (MRI) or Computerized Active Tomography (CAT) Scans are expensive, cumbersome, and not suitable for continuous monitoring. In addition, techniques such as the double indicator dilution method, the electrical impedance plethysmography, and the re-breathing method are impractical for clinical use because of limitations on sensitivity, consistency, and simplicity [1]. To overcome difficulties with above conventional techniques, an electromagnetic (EM) method has been investigated for this application. Specifically, an EM energy coupler and the associated measurement method have been developed to simultaneously measure breathing rate in addition to the changes in lung water content [2,3]. Specifically, a two-port EM sensor has been developed for animal and phantom experiments [3-5]. In these phantom and animal experiments it is shown that variation of lung water contents and breathing rate can clearly be monitored by the proposed technique.
Keywords :
biological effects of fields; biomedical imaging; cardiology; electromagnetic coupling; haemodynamics; kidney; lung; microwave imaging; patient monitoring; pneumodynamics; surgery; EM sensor; cardiac functions monitoring; congestive heart failure; diagnostic tools; electrical impedance plethysmography; electromagnetic method; hemodynamic assessments; kidney failures; noninvasive microwave technique; patient monitoring; pulmonary edema; re-breathing method; Couplers; FCC; Humans; Lungs; Microwave measurements; Microwave theory and techniques; Phantoms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE
Conference_Location :
Toronto, ON
ISSN :
1522-3965
Print_ISBN :
978-1-4244-4967-5
Type :
conf
DOI :
10.1109/APS.2010.5561063
Filename :
5561063
Link To Document :
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