Osteology of the wrist Flashcards
label these carpal bones
1 trapezium
2trapezoid
3 capatate
4 hamate
5 hook of hamate
label these carpal bones
1scapoid
2 lunate
3 triquetrium
4 pisiform
list the parts of the radius, ulna and humerus visible in the picture
radial head, olecranon, trochlea, capitellum
what is the radiocarpal joint
this hointb articulates the distal radius with the scaphoid and lunate and it also articulates the distal ulna with the lunate and triquetrial
what are the supporting ligaments of the radiocarpal joint
the dorsal and palmar radioocarpal ligaments
what are the most common x-ray projections taken for the wrist
postero-anterior and lateral projections with the most common need for wrist x-rays being for fractures and trauma
describe the positioning, centring and collimation for a postero-anterior wrist x ray
- patient should be sat with their affected side next to the table with fingers relaxed and anterior aspect of the wrist in contact with the image receptor
- centring should be midway between the radial and ulnare styloid processes
- collimation should include the proximal 3rd of the metacarpals and the distal third of the radius and ulna
describe the positioning, centring and collimation required for a lateral wrist projection
- patient positioned with affected side next to the table
- wrist is externally rotated from the PA position to make the medial aspect of the wrist come into contact with the image receptor
- centring should be directly above the radial styloid process
- collimation should include the distal third of the radius and ulna and the proximal third of the metacarpals
evaluate an xray image of a wrist
distal third of the radius and ulna should be demonstrated including the tissue outlines
clear demonstration of the radiocarpal joint
sharp image to demonstrate the bony cortex and trabeculae and soft tissue margins
adequate penetration to include the hook of hamate
