Osteology forearm 2

Question 1

describe the positioning, centring and collimation required for a standing AP humerus

Answer 1

patient stodd with back against the wall stand
- posterior aspect of the arm should be in contact with the image receptor with armn axtended and abducted away from the trunk

• centring at the midshaft of the humerus with collimation including the elbow and shoulder joint and the soft tissue surrounding the shaft

Question 2

evaluate this AP humerus Xray

Answer 2

shoulder joint, elbow joint and the shaft of the humerus are all present

• greater tuberosity of the humerus can be seen
• joint seperation can be clearly seen demonstrating a sharp image
• humeral epicondyles are equidistant

Question 3

how does a humeral shaft fracture usually occur

Answer 3

due to a direct blow, fall or twist action with radial nerve damage being commonly associated

Question 4

describe the positioning, centring and collimation required for a lateral humerus

Answer 4

patient faceing the image receptor
- anterior aspect of the arm in contact with the image receptor
- arm extended and abducted away from the trunk with medial rotation of the forearm until the palmar aspect of the arm touches the abdomen

-centring at the midhsaft of the humerus with collimation including the shoulder and elbow joint, and the soft tissue surrounding the humerus

Question 5

evaluate this image of a lateral humerus

Answer 5

shoulder and eblow joint and the soft tissue around the shaft is visualised

• clear joint separation
• humeral epicondyles are superimposed
• greater tuberosity can be seen