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Hand Bontrager
projections and positions
Question | Answer |
---|---|
What are the 3 types of bone in the hand? | Phalanges, Metacarpals and Carpals |
What are the 3 types of phalanges | Proximal, Middle, Distal |
What is the joint in the thumb? | Interphalangeeal (IP Joint) |
What is the joint between the base of the proximal phalanx and the metacarpal? | Metacarpophlangeal Joint (MCP) |
What is the joint in between the carpals? | Carpmetacarpal (CMC) |
What bone does the scaphoid articulate with? | Radius |
What bone does the lunate articulate with? | Radius |
What are the two joints between the radius and ulna? | Proximal radioulnar and distal radioulnar |
Where is the head of the ulna located? | Near the wrist |
What is the kvp for upper limb? | 50-70 |
What size focal spot should be used? | small |
What is a Barton's Fx? | dislocation of the posterior lip of the distal radius |
What is a Bennett's Fx? | @ base of 1st metacarpal |
What is a Boxer's Fx? | @ fifth metacarpal |
What is a Colles' Fx? | Fx in distal radius when the fragment is displaced posteriorly |
What is a Smith's Fx? | Fx of distal radius where fragment is displaced anteriorly |
For the fingers, where is the PA, PA oblique and Lateral centered? | PIP |
For the thumb, where should the CR be centered for the AP, PA Oblique and Lateral Projections | 1st MCP |
Which projection should be used for a Bennett's Fx? | AP Modified Robert's |
How and where is the CR placed for a Modified Robert's | 15degrees towards the wrist at the 1st CMC |
Where is the CR for a PA Hand? | 3rd MCP joint |
Where is the CR for a "fan" hand? | 2nd MCP joint |
What is the kVp for a lateral hand? | 55-65 |
Where is the CR for a Lateral Extension/Flexion? | 2nd to 5th MCP |
What is the kVp for Wrist projections? | 60+/-6 |
Where is the CR for a PA/AP wrist? | Midcarpal area |
What wrist projection is best to show a Barton's, Colles' or Smith's Fx? | Lateral-Lateromedial Projection |
Where is the CR for a PA and PA Axial Scaphoid | At scaphoid and at 10 degree proximal angle towards elbow |
What type of joint is the IP joint? | Hinge |
What type of joint is the MCP joint? | Ellipsoidal |
What type of joint is the CMC1 joint? | Saddle |
What type of joint is the CMC2-5 joint? | Gliding |
What is the cast conversion for fiberglass? | Increase mAs 25-30 and kVp 3-4 |
What is the cast conversion for dry plaster? | Increase mAs 50-60 and kVp 5-7 |
What is the cast conversion for wet plaster? | Increase mAs 100 and kvp 8-10 |
What is a subluxation? | partial dislocation |
What is the most common fx of the distal radius and ulna? | Torus or Buckle |