Imaging And Fractures Flashcards

1
Q

What is an X-ray and how does it work

A

An electromagnetic wave of high energy with a very short wavelength
Means its able to pass through many materials opaque to light
Produces and image known as a radiograph

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2
Q

Give 4 advantages of x-rays

A

Easy to access
Cheaper
Non-invasive
Less radiation than CT

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3
Q

Name 3 disadvantages of x-rays

A

Limited soft tissue details
Radiation exposure- 10 days background radiation exposure
Needs 2 views to assess- may miss injuries with only 1 view

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4
Q

What does CT stand for

A

Computerised tomography

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5
Q

Name 3 advantages of CT scans

A

More detailed than x-ray
3D image produced
Painless

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6
Q

Give 4 disadvantages of CT scans

A

Time consuming compared to x-ray
Expensive
Higher radiation than x-ray
Sometimes needs contrast- iodine

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7
Q

What does MRI stand for

A

Magnetic resonance imaging

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8
Q

How does an MRI work

A

Magnets align protons in the atoms of the body
Radio wave then knocks them out of alignment
Causes a change in the signal received by the machine
This then converted into an image

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9
Q

What are the two different weightings of an MRI

A

T1- known as anatomical- tissues look more similar to real life
T2- water in body appears white

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10
Q

What are 2 advantages of MRIs

A

No radiation
More detail than CT- good for tissues such as nerves

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11
Q

What are 4 disadvantages of MRIs

A

Expensive
Claustrophobic
Time consuming
Difficult if patient has metal implants in body

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12
Q

What is an ultrasound and how does it work

A

Uses a high frequency sound waves from a transducer
Waves reflected or slowed down by tissues of body
Waves picked up by sensor and converted into an image

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13
Q

Name 4 advantages of ultrasounds

A

No radiation
Performed at beside
Can be used for procedures
Repeatable

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14
Q

Name 3 disadvantages of ultrasounds

A

User dependent- if doctors or nurses not skilled image wont be good
Patient dependent- anatomy of patient may be hard to see
Often used as rule in not rule out- means is you see something abormal its abnormal- if you cant see anything it doesn’t mean its not normal

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15
Q

What does the sagittal plane do or show

A

Divides body into left and right

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16
Q

What anatomical plane divides the body into left to right

A

Sagittal

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17
Q

What does the coronal plane divide the body into

A

Into anterior and posterior

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18
Q

What anatomical plane divides the body into anterior and posterior

A

The coronal plane

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19
Q

What does the transverse or axial plane divide the body into

A

Superior and inferior

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20
Q

What plane divides the body into inferior and superior

A

Transverse plane
Also known as axial plane e

21
Q

What is the definition of a fracture

A

A break in the structural continuation of the bone

22
Q

When is a fracture considered open

A

If the overlying skin is broken

23
Q

When is a fracture considered closed

A

If the overlying skin is left intact

24
Q

In a fracture, if the skin has a small wound what is the fracture considered

25
Q

In a fracture, if the skin remains intact, what kind of fracture is it

26
Q

What are the 5 steps in identifying a fracture

A

Check radiograph
See fracture type
See fracture location
Fracture displacement
Anything else

27
Q

What 5 things do you do when seeing or checking a radiograph

A

Correct patient
Correct image
Multiple views
Right body area
Right time and date

28
Q

What are the three different fracture types

A

Complete, incomplete and salter Harris

29
Q

What are the 4 different types of complete fractures

A

Transverse
Oblique
Spiral
Comminuted

30
Q

What does a transverse fracture look like

A

Bone snapped straight through

31
Q

What does an oblique fracture look like

A

A snapped straight through but at an angle

32
Q

What does a spiral fracture look like

A

A bone snapped straight through but in the shape of a twisted cork screw

33
Q

What does a comminuted fracture look like

A

A bone snapped straight through into multiple parts- bit like shattered glass

34
Q

What are the 3 different types of incomplete fractures

A

Bowing
Buckle
Greenstick

35
Q

What does a bowing fracture look like

A

Bone that has bent- looks a bit like a banana

36
Q

What does a buckle fracture look like

A

Bone has impacted in on itself- like two tectonic plates going in on each other and forming a mountain or volcano

37
Q

What does a greenstick fracture look like

A

Bone slightly chipped- not completely snapped through

38
Q

What is a slater Harris fracture located

A

Fracture affecting the growth plate of a bone- mostly in children

39
Q

A bone snapped straight through is what kind of fracture

A

Transverse

40
Q

A bone snapped straight through but at an angle is what kind of fracture

41
Q

A bone snapped straight through but in the shape of a twisted cork screw is what kind of fracture

42
Q

A bone snapped straight through into multiple parts- bit like shattered glass is what kind of fracture

A

Comminuted

43
Q

A Bone that has bent- looks a bit like a banana is what kind of fracture

44
Q

A bone that has impacted in on itself- like two tectonic plates going in on each other and forming a mountain or volcano is what kind of fracture

45
Q

A bone slightly chipped- not completely snapped through is what kind of fracture

A

Greenstick

46
Q

Fractures affecting the growth plate of a bone- mostly in children are what kind of fractures

A

Salter Harris

47
Q

What are the 4 steps of fracture management

A

Resuscitate- advanced trauma life support (ATLS)- not distracted by obvious injury- check airways
Reduce- restore normal anatomy of bone- put bone back into place as well as possible
Hold- use plaster cast or splint or internal/ external fixation
Rehabilitation

48
Q

What are the 4 steps of fracture healing

A
  1. Haematoma formation- bleeding leading to accumulation of blood
  2. Fibrocartilaginous callus formation- soft callus
  3. Ossification of callus- hard callus
  4. Bone remodelling