| Quantification of flow volume with a new digital three-dimensional color Doppler flow approach: an in vitro study. | |
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MedLine Citation:
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PMID: 11762542 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: The quantification of flow stroke volume is important for evaluation of patients with cardiac dysfunction and cardiovascular disease. Three-dimensional digital color Doppler flow imaging allows the acquisition of flow data in an orientation approximately parallel to flow and analysis of the Doppler flow velocities perpendicular to flow (cross-sectional flow calculation). This in vitro study assessed the applicability of this method for quantifying cardiac output in a funnel-shaped tube model similar to mitral inflow or the left ventricular outflow tract. METHODS: A new digital three-dimensional color Doppler method was used to acquire Doppler flow information. Raw scan line data with digital velocity assignments were obtained on a conventional Doppler color flow imaging system with a 180 degrees rotating multiplanar transesophageal probe connected to a computer workstation. Nine stroke volumes (20-60 mL) with flow rates ranging from 1.5 to 5.28 L/min in a funnel-shaped pulsatile laminar flow model were studied. Three-dimensional flow rates were compared with standard-of-reference measurements of flow obtained from timed collection in a graduated cylinder and with an ultrasonic flow meter. RESULTS: Within the funnel tube, the flow volumes that were calculated from the first, second, and third depths and the average of all 3 depths correlated well with the actual flow rate (r = 0.97-0.99). Results from the middle and second levels and from the average of all 3 depths provided the closest fit to the actual flow rates (r = 0.99; y = 0.96x + 0.14; and r = 0.98; y = 1.14x - 0.43, respectively). CONCLUSIONS: Although a work in progress, this digital three-dimensional color Doppler flow measurement method is feasible, accurate, and simple, and it may offer in vivo evaluation of blood volume flow given a favorable orientation between the valve orifice and the scanning device. |
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Authors:
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J Li; X Li; Y Mori; R A Rusk; J S Lee; C H Davies; I Hashimoto; G O El-Sedfy; X N Li; D J Sahn |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine Volume: 20 ISSN: 0278-4297 ISO Abbreviation: J Ultrasound Med Publication Date: 2001 Dec |
Date Detail:
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Created Date: 2001-12-12 Completed Date: 2002-02-26 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8211547 Medline TA: J Ultrasound Med Country: United States |
Other Details:
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Languages: eng Pagination: 1303-11 Citation Subset: IM |
Affiliation:
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Clinical Care Center for Congenital Heart Disease, Oregon Health Sciences University, Portland 97201-3098, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity
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physiology Coronary Circulation / physiology* Echocardiography, Doppler, Color* Humans Imaging, Three-Dimensional* Models, Cardiovascular Stroke Volume / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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