Automated analysis of Doppler ultrasound velocity flow diagrams

2001 ◽  
Vol 20 (12) ◽  
pp. 1422-1425 ◽  
Author(s):  
J. Tschirren ◽  
R.M. Lauer ◽  
M. Sonka
Keyword(s):  
Doppler Ultrasound ◽  
Ultrasound Velocity ◽  
Automated Analysis ◽  
Velocity Flow ◽  
Flow Diagrams

Doppler ultrasound velocity estimation

1997 ◽  
Vol 101 (5) ◽  
pp. 2431
Author(s):  
Jin H. Kim ◽  
Dong-Chyan Liu
Keyword(s):  
Doppler Ultrasound ◽  
Ultrasound Velocity ◽  
Velocity Estimation

Flow System to Detect Transitional Flow Based on Pulsed Doppler Ultrasound Velocity Profiles

2012 ◽  
Author(s):  
Narender Ambati ◽  
Dipankar Biswas ◽  
Francis Loth ◽  
Stanley E. Rittgers ◽  
Steven A. Jones
Keyword(s):  
Reynolds Number ◽  
Doppler Ultrasound ◽  
Critical Reynolds Number ◽  
Flow System ◽  
Ultrasound Velocity ◽  
Transition To Turbulence ◽  
Transitional Flow ◽  
Working Fluid ◽  
Pulsed Doppler Ultrasound

A flow circuit test rig has been constructed to determine the critical Reynolds number at which blood flow become turbulent. A Doppler ultrasound velocimeter was used in an in vitro flow system to measure the velocity of water inside a straight pipe in order to determine the critical Reynolds number (Re) at which the flow becomes transitional. Results using water as the working fluid demonstrated flow-transition to turbulence near Re = 2000 which is close to the expected value from literature. Future studies will utilize blood as the working fluid.

Automated Determination of Serum Glutamic Oxalacetic and Glutamic Pyruvic Transaminase

1964 ◽  
Vol 10 (6) ◽  
pp. 519-532 ◽  
Author(s):  
Roscoe R Schaffert ◽  
George R Kingsley ◽  
Gloria Getchell
Keyword(s):  
Automated Analysis ◽  
Glutamic Pyruvic Transaminase ◽  
Color Unit ◽  
Flow Diagrams ◽  
Automated Determination

Abstract The determination of serum glutamic oxalacetic and glutamic pyruvic transaminase has been simplified by the use of automated analysis. The flow diagrams, concentration of reagents, and calculation of the color unit in terms of the Karmen unit are shown for 2,4-dinitrophenylhydrazine and 6-benzamido-4-methoxy-m-toluidine diazonium chloride as the reacting dyes. Advantages of both methods are compared and discussed.

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