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Hemodynamics notes

Stack #4453752

TermDefinition
The ability of the veins to accommodate large changes in volume is called Compliance
T/F With low intraluminal pressure the vein will be elliptical shaped True
What is sometimes referred to as the venous heart? Calf muscle pump
T/F: In the peripheral venous system blood flows from the superficial veins to the deep system True
What is the purpose of a valve in a vein Maintains proper direction of the venous flow
What are the two types of pressure exerted on the venous walls? Intraluminal and interstitial pressure
The difference between intraluminal and interstitial pressures equals what pressure? Transmural pressure
When in a supine position what is the approximate hydrostatic pressure? OmmHg
T/F: all venous valves open at the same time False
T/F: the number of valves one may have is genetically determined True
What occurs if the valve cannot close back in its own Reflux
T/F: Transluminal, pressure is the combination of intraluminal and interstitial pressure. False
The weight of the column of blood from the heart to the level of pressure measure is Hydrostatic pressure
T/F: At rest veins are reservoirs for blood True
What does the valsalva maneuver test? Valvular competency
Which of these is NOT a competent of venous valve anatomy? Commissure, tunica media, agger or cusps Tunica media
Which of these is characteristic of an Ostia valve? An ostias valve generally consists of 1 cusp, occasionally 2
Where in the venous anatomy is a thrombus most likely to form? In the sinus
In the average pátient, how many valves appear in the greater saphenous vein? 7-9
What occurs when the volume of flow in the vein is high ? Intraluminal pressure is high and the vein is circulár.
T/F: Interstitial pressure is the pressure inside of the vein that pushes outward False
T/F: The posterior tibial vein has an average of 19 venous valves True
T/F: A commonly occurring location for a thrombus to originate is in the sinus True
T/F: An agger can be described as the free edges of the cusps in a valve. False
T/F: Ostia valves cusps are semi lunar True
T/F: In an individual who is supine, the hydrostatic pressure is approximately equal to 100mmHg False
T/F: Respiratory activity does not significantly affect the venous flow in a supine patient False
T/F: venous valves appear in the long veins of the extremities, as well as in the abdomen True
Veins are connected between the deep & superficial systems via _____ Perforators
What are two things that cause pressure changes In the veins Calf muscle & respiration
The free edge border of valve leaflets is called Commisure
The greater the intraluminal pressure, the greater the volume of flow, the larger & more circular the ______ Cross-sectional appearance
_______ causes a potential space, which allows blood flow into the deep system via perforators Calf muscle relaxation
What type of flow present in incompetent venous valves Both Antegrade and retrograde
What veins and upper extremities have no spontaneous Doppler signal Tibial veins, small sephaneous veins and ulnar veins
What is venous reflux Retrograde flow
Increase in venous flow signal during proximal compression is an indication of Incompetent valve
Normal physic waveforms with respiratory variation increase with ______ and decrease with ________ Expiration / inspiration
The valsalva maneuver is a method to apply ______ to the CFV Proximal compression
What flow pattern is expected in the internal jugular, subclavian, and innovate veins Pulsatile
Characteristics of normal hepatic vein flow are Minimally phased, bidirectional or pulsatile
Normal portal vein pattern is _________ by normal respiration in an adult patient. Essentially unaffected
Which of these is definition of patency? Patient is in the supine position, the vessel being imaged has significant obstruction, The vessel is without obstruction The vessel is without obstruction
What is the correct definition of phasicity The variance of flow corresponding with respiration
What would be considered abnormal in lower extremity veins Have a continuous flow pattern
What normal characteristic would cause the subclavian vein to be non-compressible The proximity to bony structures
Which of these is NOT a characteristic of abnormal venous flow Physic flow with respiration
What vein/s within the venous system are typically too deep to compress The pelvic veins
What is the term for blood flow that is traveling away from the liver Hepatofugal flow
T/F: venous valves appear in the long veins of the extremities, as well as in the abdomen True
T/F: a normal portal vein is characterized in b-mode imaging by its hyperechoic walls. False
T/F: veins that occur in close proximity to the heart will be pulsatile True
T/F: pulsatile venous flow in the lower extremities can be caused by over-hydration True
T/F:In the proximal obstruction, the normal response of the vein would be the cessation of venous flow. True
T/F: in normal venous flow patterns, there should not be a spontaneous signal, False
What is a contraindication to performing valsalva maneuver? CHF, arrhythmia
T/F: distal compression can be used effectively on a dialysis access graft False
What type of valve is found at the intersection of two veins Ostias valve
T/F: The number of valves in a vessel is the same for every person False
What controls the opening and closing of the valves? Pressure changes
Where in the valve is the most common place for thrombus? Sinus
Normal venous valves have how many cusps? 2
The agger is the inner surface of the vein where the _______ attaches Cusp
The difference between the intraluminal and the interstitial pressures is called the Transmural pressure
Created by: jcazares10
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