Ultrasound 2 Flashcards

1
Q

Which setting on the US machine is used to adjust the strength of the returning echoes displayed on the screen?
A. Depth
B. Attenuation
C. Gain
D. M mode

A

C. Gain

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2
Q

_______ determines how deeply you can see into the body

A

Depth

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3
Q

_______ produces a real-time image of the sonoanatomy and most bedside US procedures utilize this modality.

A

B mode

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4
Q

The “B” in b-mode stands for the

A

Brightness of the pixels on the screen

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5
Q

M-mode stands for ______ and is an alternative US modality similar to a time-lapse photo, it illustrates the reflective movement of structures over time

A

Motion

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6
Q

According to the Doppler effect, what changes occur when the sound source moves closer to a person listening to that sound?
1. Wavelength becomes shorter
2. Pitch increases
3. Doppler shift becomes negative

A
  1. & 2.
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7
Q

If the source moves towards an observer, then the wavelength gets _______ in this direction, and the frequency (pitch) appears to _______. We call this a _______ Doppler effect.

A

Shorter, increase, positive

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8
Q

The Doppler effect describes the change in the

A

Perceived frequency of a sound wave when there’s relative motion between the sound’s source and an observer

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9
Q

In terms of ultrasound, a positive Doppler shift appears _____, and a negative Doppler appears

A

Red; blue

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10
Q

When evaluating the Doppler shift, you must understand the

A

Angle of insonation

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11
Q

The degree of Doppler shift depends on

A

Frequency of the US beam
Blood flow velocity
Angle of intonation

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12
Q

According to the standard convention, the orientation marker on the US probe should point towards

A

The head of the right

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13
Q

This breaks the standard convention of having the orientation marker on the right

A

Cardiology convention

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14
Q

The _________ describes the angle at which the US waves encounter a structure.

A

The angle of incidence

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15
Q

You’ll obtain the best image quality when the US beam encounters a structure at

A

90 degrees

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16
Q

Describe in plane vs out of plane

A

In-plane: needle runs parallel to the transducer, long axis of the needle
Out- of plane- perpendicular, short axis of the needle

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17
Q

Describe tilting.

A

Moving the probe backward and forward at the same point of contact to changes the angle of incidence

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18
Q

Describe rocking.

A

Moving the transducer from side to side while in the long axis
Helpful while viewing a narrow acoustic window

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19
Q

Describe compression.

A

Improves image resolution by reducing the distance between the probe and the image

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20
Q

Describe sliding.

A

Moving the transducer up and down while maintaining the sample angle of incidence

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21
Q

Describe rotation.

A

Moving the transducer in a clockwise or counter clock-wise fashion in the same axis of compression; helpful when changing from long to short axis

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22
Q

What is reverberation?

A

Occurs when a sound wave bounces between two strong parallel reflecting surfaces

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23
Q

You may see reverberation when

A

Imaging the pleura or when you’re using a highly attenuating wide bore needle

24
Q

Common ultrasound artifacts include

A

Air, shadow, acoustic enhancement, mirror image, reverberation, bayoneting

25
Q

Air artifact appears as

A

A black region

26
Q

Air artifact is solved by

A

Applying more gel, applying more pressure, or selecting a transducer with a footprint that allows for better contact

27
Q

Because acoustic energy doesn’t penetrate bone very well, you’ll observe ________ deep to the hyperechoic border

A

Acoustic shadow

28
Q

_____________ is the best way to minimize the influence of a shadow artifact

A

Adjusting the scanning plane to find a better acoustic window

29
Q

______ occurs when the US beam gets trapped between two highly reflective tissues and this causes a time delay in some of the returning echoes

A

Mirror image

30
Q

________ occurs when the needle passes through the adjacent tissues of different acoustic impedance

A

Bayoneting

31
Q

Bayoneting appears like

A

The needle bending as it penetrates a tissue boundary

32
Q

During a cardiac POCUS examination, what structures are visible on a parasternal short-axis view of the heart?
Right ventricle
Aorta
Left ventricle
Pericardium

A

Left ventricle & pericardium

33
Q

The basic cardiac exam relies on three standard imaging windows including

A

Parasternal
Apical
Subcostal

34
Q

The basic cardiac exam consists of five views

A

Parasternal long-axis
Parasternal short-axis
4 chamber apical
4 chamber subcostal
IVC

35
Q

Cardiac POCUS allows us to answer yes/no questions about the patient’s clinical status including

A

Is there ventricular function failure, valvular dysfunction, pericardial effusion, patient’s volume status, regional wall motion abnormalities, responsiveness to fluids, are there gross signs of chronic hear disease, is there an inter cardiac mass

36
Q

In the parasternal window we can view the

A

Parasternal long axis & parasternal short axis

37
Q

In the apical window we can view

A

An apical 4 chamber

38
Q

In the subcostal window we can view

A

Subcostal 4 chamber & subcostal IVC

39
Q

Structures viewed in the parasternal long axis include

A

LA, LV, mitral valve, aortic valve, aorta, pericardium

40
Q

The parasternal long axis view can be utilized to interpret

A

LV function, aortic and mitral valve lesions, and pericardial effusions

41
Q

In the parasternal short axis we can view the structures of the

A

LV+ papillary muscle, RV, and pericardium

42
Q

In the parasternal short axis view, we can use this to interpret

A

LV and RV function, pericardial effusion

43
Q

In the apical 4-chamber view, structures visualized include

A

RA, RV, LV, LA, mitral valve, aortic valve, pericardium

44
Q

The apical 4 chamber view can be utilized to interpret

A

LV and RV function , AV valve lesions, pericardial effusion

45
Q

The subcostal 4 chamber view can be utilized to visualize

A

RA, RV, LV,LA, mitral and aortic valves, liver

46
Q

The subcostal 4 chamber view can be used to interpret

A

RV function. Pericardial effusion

47
Q

The structures visualized in the subcostal IVC include

A

IVC, RA, and liver

48
Q

The subcostal IVC can be used to interpret

A

Volume status

49
Q

IVC collapse suggests

A

Hypovolemia

50
Q

Lung US is useful for diagnosing

A

Pneumothorax and endobroncheal intubation

51
Q

Gastric contents are best assessed with ultrasound when the patient is in the _______ position

A

right lateral decubitus

52
Q

Performing gastric ultrasound in the supine position will

A

likely underestimate the volume of gastric contents

53
Q

If the stomach is empty, the antrum will appear

A

flat or like a small oval, sometimes referred to as a “bull’s eye”

54
Q

Clear contents inside the stomach will make the antrum look

A

round and distended
clear liquids will be anechoic

55
Q

Particulate matter inside the stomach will make the antrum look

A

round and distended and appear hyperechoic or bright particulate matter