Understanding ultrasound physics
chapter 18 HEMODYNAMICS Exam
Questions and Answers
_______ is the study of blood moving through the circulatory system. - ANSWER-
Hemodynamics
Synonym of flow: - ANSWER-Volume flow rate
What question do FLOW measurements answer ?
What units? - ANSWER-How MUCH? (Volume of blood moving at a particular time)
Volume/Time (ml/s)
The _______ indicates the speed or swiftness of a fluid moving from one location to
another.
Units? - ANSWER-VELOCITY
Distance/Time (cm/s, m/min)
What are the 3 forms of flow? - ANSWER-Pulsatile, Phasic, Steady
In Pulsatile flow, blood moves with ______ velocity; Accelerates and decelerates with
______ _______. Example? - ANSWER-VARIABLE
CARDIAC CONTRACTIONS
ARTERIAL flow is pulsatile
In Phasic flow, blood moves with ______ velocity;
accelerates and decelerates with ________. Example? - ANSWER-VARIABLE
RESPIRATIONS
VENOUS circulation is phasic
What is Steady flow? - ANSWER-Fluid moving at a constant speed or velocity.
i.e. Venous flow when someone stop breathing for a moment
Layers of blood with parallel streamlines that travel at individual speeds describes
______ flow. - ANSWER-Laminar
_____ flow is laminar flow when all layers travel at the same velocity. - ANSWER-Plug
________ _________ predicts whether flow is laminar or turbulent. - ANSWER-
Reynolds number
Name 3 forms of Energy associated with blood, whose SUM = Total Energy at a specific
location within the circulation: - ANSWER-Kinetic + Pressure + Gravitational
chapter 18 HEMODYNAMICS Exam
Questions and Answers
_______ is the study of blood moving through the circulatory system. - ANSWER-
Hemodynamics
Synonym of flow: - ANSWER-Volume flow rate
What question do FLOW measurements answer ?
What units? - ANSWER-How MUCH? (Volume of blood moving at a particular time)
Volume/Time (ml/s)
The _______ indicates the speed or swiftness of a fluid moving from one location to
another.
Units? - ANSWER-VELOCITY
Distance/Time (cm/s, m/min)
What are the 3 forms of flow? - ANSWER-Pulsatile, Phasic, Steady
In Pulsatile flow, blood moves with ______ velocity; Accelerates and decelerates with
______ _______. Example? - ANSWER-VARIABLE
CARDIAC CONTRACTIONS
ARTERIAL flow is pulsatile
In Phasic flow, blood moves with ______ velocity;
accelerates and decelerates with ________. Example? - ANSWER-VARIABLE
RESPIRATIONS
VENOUS circulation is phasic
What is Steady flow? - ANSWER-Fluid moving at a constant speed or velocity.
i.e. Venous flow when someone stop breathing for a moment
Layers of blood with parallel streamlines that travel at individual speeds describes
______ flow. - ANSWER-Laminar
_____ flow is laminar flow when all layers travel at the same velocity. - ANSWER-Plug
________ _________ predicts whether flow is laminar or turbulent. - ANSWER-
Reynolds number
Name 3 forms of Energy associated with blood, whose SUM = Total Energy at a specific
location within the circulation: - ANSWER-Kinetic + Pressure + Gravitational
