Hand And Wrist Positioning Flashcards
Where is the CR for a digit?
The proximal interphalangeal joint
Which phalanges are rotated medially for oblique finger projections?
The 2nd digit
Which digits are rotated laterally for an oblique finger projection?
3rd- 5th
Which digits have a lateromedial projection on a lateral digit?
3rd-5th
Which digits have a mediolateral projection for a lateral digit?
2nd
Where do you center for a thumb projection?
First metacarpophalangeal joint
What type of fracture does a Modified Roberts method projection rule out?
Bennett’s fracture at the base of the 1st metacarpal
What position is the hand in for a PA oblique projection of the thumb?
Pronated= thumb in naturally oblique position
Where do you center for PA and PA oblique hand projection?
3rd metacarpophalangeal joint
Where do you center for a fan lateral hand projection?
The 2nd metacarpophalangeal joint
Which metacarpals should be superimposed at the distal end on a PA oblique hand projection?
3rd-5th
How much of the distal radius and ulna should be visualized on hand projections?
About an inch
What are two alternatives to a fan lateral hand to see breaks and densities?
Lateral in extension and lateral in flexion
What is another name for the AP oblique Bi-lateral hand projection?
Noorgard method
Where do you center for the Noorgard method?
At the level of the 5th metacarpophalangeal joint
What is the main reason a Noorgard method projection is performed?
To check for rheumatoid arthritis
What position is the hand in for a PA wrist projection?
Pronated with fingers slightly curled under into a loose fist
Where is the CR for a wrist projection?
Mid carpal area
What do you do with the fingers for a PA wrist projection?
Slightly curl them under the palm to bring the carpals closer to the IR
Which direction should the wrist be rotated for a PA oblique projection?
Laterally
Which carpals are best demonstrated on a PA oblique wrist projection?,
The trapezium and trapezoid free of superimposition, scaphoid, and distal radius and ulna
What will a PA oblique image show if it is over rotated laterally?
No seperate on between the trapezium and trapezoid
What is the thumbs position for a lateral wrist projection?
Thumb pointed up
What fractures are best demonstrated with a lateral wrist projection?
Barton’s fracture- posterior tip of distal radius
Colles fracture- posterior fragment of distal radius
Smiths fracture- anterior fragment of distal radius
What two projections best demonstrate possible scaphoid fractures?
Ulnar Deviation
Modified Stetcher Method
Where do you center for an ulnar deviation?
10-15 degrees proximally to scaphoid
What is the hand position on a modified Stetcher method?
Placed on a 20 degree angle sponge
Where do you center for a radial deviation?
Mid carpal area
Which carpals are best demonstrated with a radial deviation?
Hamate, Pisiform, Triquetrum, Lunate
What is the method name for the carpal canal tangential wrist projection?
Gaynor-Hart Method
What is the hand position for a carpal canal/ Gaynor-Hart Method?
- Palmar surface at 90 degrees from wrist
- Hand rotated internally a out 10 degrees
Where is the CR directed for a carpal canal/ Gaynor-Hart Method projection of the wrist?
- 25-30 degrees to the long axis of the hand
- 2-3 inches distal to the base of the third metacarpophalangeal joint
