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Positioning for Placement Blocks > Elbow and Forearm > Flashcards

Elbow and Forearm Flashcards

1
Q

what is the CP for AP/Lateral forearm

A

perpendicular to the mid forearm

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2
Q

what should the collimation be for an AP/lateral forearm

A

proximal carpals and distal humerus

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3
Q

what should be the patient positioning for the lateral forearm

in terms of the elbow, wrist, humerus and epicondyles

A

elbow flexed 90*

wrist in true lateral position

humerus and forearm parallel to the IR

epicondyles superimposed

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4
Q

what is the patient positioning for the AP forearm

in terms of wrist, forearm, elbow and epicondyles

what can be used to help keep the wrist and forearm parallel

A

wrist, forearm and elbow AP but not over rotated

medial and lateral epicondyles equidistant to the IR

use sponge under wrist

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5
Q

what are the 3 views for an elbow

A

AP
Lateral
Radial Head

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6
Q

what is the CP for an AP elbow

A

perpendicular to the mid elbow joint between the medial and lateral humeral epicondyle

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7
Q

what is the CP for a lateral elbow

A

perpendicular to the midelbow joint at lateral epicondyle

4cm medial to the olecranon

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8
Q

what is the CP for a radial head elbow view

A

45* cranially from vertical

angled towards the shoulder

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9
Q

what is the patient positioning for the AP elbow

in terms of the interepicondylar plane

A

arm fully extended and lean laterally

interepicondylar plane parallel to the IR

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10
Q

what is the patient positioning for the lateral elbow

A

elbow flexed 90*

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11
Q

what is the patient positioning for the radial head elbow view

A

elbow flexed 90*

palm down

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12
Q

what is the patient positioning critique for the forearm views

A 
AP = arm straight
Lateral = arm flexed
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13
Q

what should patient do with their body when positioning for a AP forearm

A

patient may need to lean back to bring elbow into AP position

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14
Q

what is the area of interest for the AP forearm

in terms f the joints, what shows no rotation, the styloid and tuberosities and olecranon process

A

carpal bones to distal humerus

both elbow and wrist joint

humeral epicondyles in profile
radial head, neck and tuberosity superimposed by ulna = no rotation

radial styloid process in profile laterally

radial tuberosity in profile medially, radius and ulna run parallel with radial head slightly superimposed on ulna

olecranon process in olecranon fossa

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15
Q

what is the area of interest for the lateral forearm

in terms f the joints, what shows no rotation, the styloid and tuberosities and olecranon process

A

head of ulna superimposed over radius = lateral wrist

humeral epicondyles superimposed = no rotation

ulnar styloid in profile posteriorly and anterior aspects of the radial head and coronoid process are aligned (humeral epicondyles perpendicular with the IR)

Anterior aspect of the distal scaphoid and the pisiform are aligned

Distal radius and ulna superimposed (Lateral wrist)

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16
Q

what is the area of interest for an AP elbow view

in terms of what shows no rotation, epicondyles, radial head and tuberosity, and elbow joint spaces

A

No rotation = Bilateral epicondyles in profile, radial head, neck and tuberosity free of superimposition by ulna or slightly superimposed

Medial and lateral humeral epicondyles are demonstrated in profile (humeral epicondyles parallel with the IR)

Radial head slightly superimposed on ulna (humeral epicondyles parallel with the IR)

Radial tuberosity is in profile medially & Radius and ulna are parallel (AP wrist)

Elbow joint space is open, Radial head articulating surface is not demonstrated & Olecranon process is situated within the olecranon fossa (elbow fully extended)

17
Q

what is the area of interest for a lateral elbow view

in terms of olecranon, joint space, epicondyle

A

Olecranon process in profile, half of radial head superimposed by coronoid

Joint space open

Epicondyles aligned – you should see a figure 8 pattern. The capitulum and trochlea should be superimposed if true lateral

18
Q

what is the area of interest for a elbow view

A

Distal 1/3 humerus, elbow joint and proximal 1/3 radius and ulna

19
Q

what is the area of interest for a radial head elbow view

in terms of radial head and joint space

A

The radial head should be free almost from superimposition & projected away from the ulna

The radial head is slightly elongated

Joint space between radial head and capitulum should be open and clear

20
Q

what is the SID for an elbow/forearm view

A

100-110cm

21
Q

what is the kV for an elbow/forearm view

A

50-60kVp

22
Q

what is the mAs for an elbow/forearm view

A

1.5-2.5mAs

23
Q

are grids used for elbow/forearm views

A

no grid

Positioning for Placement Blocks (9 decks)

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