Influence of the Coanda effect on color Doppler jet area and color encoding. In vitro studies using color Doppler flow mapping.
Influence of the Coanda effect on color Doppler jet area and color encoding. In vitro studies using color Doppler flow mapping.
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康达效应对彩色多普勒射流面积和颜色编码的影响。
DOI：
10.1161/01.cir.85.1.333
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发表时间：
1992
期刊：
影响因子：
37.8
通讯作者：
Weintraub,R
中科院分区：
文献类型：
--
作者：
Chao,K;Moises,VA;Shandas,R;Elkadi,T;Sahn,DJ;Weintraub,R
We studied surface adherence and its effects on color Doppler jet areas and color encoding in an in vitro model with a noncompliant receiving chamber into which a steady flow jet was directed parallel to either a straight or a curved surface adjacent to and 4 mm away from the inflow orifice (1.50 mm2) with the control condition being a free jet matched for flow rates and driving pressures. Jets were imaged perpendicular to the plane of the surface, the plane in which most clinical images of jet-surface interactions are obtained. Ten different flow rates ranging from 0.13 to 0.30 l/min were used. Surface-adherent jet areas were smaller than control jets for every driving pressure-volume combination (paired t test, p less than 0.01). Computer analysis of color Doppler images showed more green and blue (reverse flow) pixels on the surface side of the adherent jets than the control jets (p less than 0.05), suggesting that viscous energy loss and flow deceleration and reversal play a role in the jet-surface interaction. Analysis of variance demonstrated that linear regression slopes of flow rate versus jet area for surface jets were lower (slopes, 11-21 cm2/l/min; r = 0.95-0.97) than those for the control (slope, 33 cm2/l/min; r = 0.97) (p less than 0.0001). Surface adherence (Coanda effect) influences jet size and color encoding, causing smaller color Doppler jet areas and greater variance and reverse velocity encoding.
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影响因子：
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作者：
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DOI：
10.1111/j.1540-8175.1988.tb00279.x
发表时间：
1988
期刊：
Echocardiography
影响因子：
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作者：
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通讯作者：
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