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Quiz von Corey Briffa, aktualisiert more than 1 year ago
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Erstellt von Corey Briffa
vor fast 10 Jahre
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Frage 1
Frage
What type of radiation occurs when using ultrasonography?
Antworten
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Mechanical
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Gamma
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Beta
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Ultraviolet
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Sound
Frage 2
Frage
What are the two types of waves that ultrasonography detects?
Antworten
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Compression
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Shear
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Supression
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Tension
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Short wavelength
Frage 3
Frage
What is the region of frequency for ultrasonography?
Antworten
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1-20MHz
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100-250MHz
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1000-2500MHz
Frage 4
Frage
What is absorption? (Ultrasonography)
Antworten
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When the US energy is converted into heat
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When US energy is unable to be detect
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When the US energy reaches a point and bounces back to the detector
Frage 5
Frage
What factors can cause the amplitude to be reduced during an ultrasound? (Three answers)
Antworten
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Tissue Properties
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Frequency
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Distance travelled
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Strength of the wavelength
Frage 6
Frage
Is this the correct definition for refraction?
When some or all energy is diverted from its original path
Antworten
- True
- False
Frage 7
Frage
Is this the correct definition for diffraction?
Divergence of a beam from sound source
Antworten
- True
- False
Frage 8
Frage
Is this the correct definition of Scatter?
Some energy is reflected from a boundary
Antworten
- True
- False
Frage 9
Frage
Explain attenuation....
Antworten
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The loss of power or amplitude of the ultrasound signal as it passes through tissue
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The ability for the ultrasound to 'attenuate' a low signal, thus making it more detectable
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Attenuation = absorption + scatter + reflection
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This is the term given to the adaptation of the signal as it finds the target tissue.
Frage 10
Frage
Tick all the different types of ultrasound scans
Antworten
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Continuous * pulsed wave
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Pulse-Echo principles (A-scan)
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B-Mode image
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Transmit focussing
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Focused
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Simple
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Z-mode
Frage 11
Frage
Is this the correct definition for the Doppler effect?
The difference between the transmitted frequency (Ft) and the received frequency (Fr)
Antworten
- True
- False
Frage 12
Frage
Is it true that colour Dopplers show the difference between arteries and veins?
Antworten
- True
- False
Frage 13
Frage
Which of these are relevant to Power Doppler, but not Colour Doppler?
Antworten
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Angle independent
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Better Boundary detection
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Detect Blood flow
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Image noise in random flashes of colour
Frage 14
Frage
Choose the benefits of using ultrasound...
Antworten
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Real-time Guidance
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Non-ionising radiation
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Speed
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Portable
Frage 15
Frage
What is the correct equation for blood pressure?
Antworten
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Cardiac output x Total peripheral resistance
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Cardiac output x aortic pressure
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Heart rate x Stroke volume
Frage 16
Frage
Tick the different layers of a blood vessel
Antworten
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Tunica Media
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Tunica intima
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Tunia Adventitia
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Tunica medium
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Tunica interna
Frage 17
Frage
Is it true or false that perivascular nerves are found on the outside of the tunica adventitia?
Antworten
- True
- False
Frage 18
Frage
Is this statement true?
When vascular smooth muscle relaxes vessel diameter decreases
Antworten
- True
- False
Frage 19
Frage
What vessels are key in controlling resistance for circulation?
Antworten
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Small arteries & arterioles
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large arteries & arteriole
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Veins
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Venules
Frage 20
Frage
Define; Isometric tension recording
Antworten
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Measuring tension generated by the vascular wall with diameter of the vessel constantly changing.
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Measuring tension generated by the vascular wall with diameter of the vessel remaining constant
Frage 21
Frage
Would isometric tension recording occur, in vitro or in vivo?
Antworten
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In vitro
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in vivo
Frage 22
Frage
Is this statement true?
Wire myography requires dissection skills and is better used for small vessels with an internal diameter of 100-400 micrometers.
Antworten
- True
- False
Frage 23
Frage
What do changes in tension of a blood vessel indicate?
Antworten
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Vasodilation
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Vasoconstriction
Frage 24
Frage
Is this statement true?
Nitric Oxide is a signalling molecule in the cardiovascular system
Antworten
- True
- False
Frage 25
Frage
Pick from the list below, the disadvantages of the cardiovascular techniques studied;
Antworten
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Difficulty in studying long term changes
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Cannot measure flow-induced relaxation
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Freshly prepared vessels can be viable for hours
Frage 26
Frage
What does a stretch in smooth muscle cause?
Antworten
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Causes muscle contraction
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Causes a tear in the endothelial cells
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Causes muscle relaxation
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Causes a complex molecular signalling pathway that causing a release of further signalling substances
Frage 27
Frage
Is this statement true?
Shear stress has frictional force on the endothelium leading to vasoconstriction
Antworten
- True
- False
Frage 28
Frage
What causes the impairment in the sheer stress mechanism to cause vasoconstriction?
Antworten
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Cardiovascular disease
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Ageing
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Atherosclerosis
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Renal impairment
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