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Wrist Positioning
Wrist/Scaphoid
| Term | Definition |
|---|---|
| What are the three routine projections for the Wrist series? | PA projection Lateral projection PA Oblique projection |
| PA projection Collimation? patient positioning? IR placement? Central Ray? Shield | 8x10 Seated at the end of the table, flexing the elbow 90 degrees Center IR to the point of flexion of wrist Perpendicular to the midcarpal area Shield is required |
| Lateral Projection Collimation? Patient position? IR placement? Central Ray? Shield? | 8x10 Seated at the end of the table, flexing the elbow 90 degrees and placing wrist in lateral position Center IR to wrist, forearm and hand in the lateral position Perpendicular to the wrist joint Shield is required |
| PA Oblique Collimation? Patient position? IR placement? Central Ray? Shield? | 8x10 Seated at the end of the table, flexing the elbow 90 degrees Center IR to wrist, and rotate wrist laterally 45 degrees Perpendicular to the midcarpal area Shield is required |
| What are the two routine projections for the Scaphoid series? | PA projection PA Axial projection |
| PA projection Collimation? patient positioning? IR placement? Central Ray? Shield | 8x10 Seated at the end of the table, flexing the elbow 90 degrees Center the wrist on the IR and turn the hand outward in extreme ulnar deviation Perpendicular to scaphoid (CR 10-15 degrees angled) Shield is required |
| PA Axial projection Collimation? patient positioning? IR placement? Central Ray? Shield | 8x10 Seated at the end of the table with arm and axilla in contact with table Place IR on a 20 degree angle sponge and center wrist on IR. Perpendicular directed to enter the scaphoid Shield required |
| Flexing the fingers for the PA projection of the wrist does what two things? | Decreases OID Increases recorded detail |
| For the lateral projection of the wrist, how should the elbow be positioned? | Flexed 90 degrees |
| For the lateral projection of the wrist, which surface of the wrist should be in contact with the IR? | Medial |
| How much should the wrist be rotated for the PA oblique projection? | 45 degrees |
| In a lateral wrist projection what other bones in addition to the metacarpals and the carpals should be superimposed for this projection ? | Radius and Ulna |
| For the PA oblique projection when the scaphoid is of primary interest the scaphoid can sometimes be better demonstrated if he patient deviates the hand and wrist toward the _______. | Ulna |
| Which bone is of primary interest of the PA wrist in ulnar deviation? | Scaphoid |
| To delineate a fracture line better with a PA projection of the wrist in ulnar deviation, how many degrees and in which direction may the central ray be directed? | 10 to 15 degrees proximally or distally |
| Which carpal bone is the primary interest when using the "Stretcher" method? | Scaphoid |
| How far from horizontal should the IR be inclined toward the elbow for the "Stretcher" method? | 20 degrees |
| When using a wedge to elevate the IR how should the central ray be directed toward the wrist? | Perpendicularly |
| If no wedge is used to angle the IR, how should the central ray be directed toward the wrist? | At a 20 degree angle toward the elbow |
Created by:
yt88
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