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The posterior fat pad is normally pressed in the olecranon fossa by the triceps tendon, and hence invisible on lateral radiograph of the elbow. [3] When there is a fracture of the distal humerus, or other pathology involving the elbow joint, inflammation develops around the synovial membrane forcing the fat pad out of its normal physiologic resting place.
Because dislocations make the knee unstable, 15% of patellas will re-dislocate. [27] Patellar dislocations often occur when the knee is in full extension and sustains a trauma from the lateral to medial side. [28] Elbow: Posterior dislocation, 90% of all elbow dislocations [29] Wrist: Lunate and Perilunate dislocation most common [30]
Elbow dislocations constitute 10% to 25% of all injuries to the elbow. The elbow is one of the most commonly dislocated joints in the body, with an average annual incidence of acute dislocation of 6 per 100,000 persons. [30] Among injuries to the upper extremity, dislocation of the elbow is second only to a dislocated shoulder. A full ...
Children whose proximal radial epiphyseal plate has not finished fusing may suffer dislocations of this joint, called pulled elbow or Nursemaid's elbow.A common cause of this dislocation is a caregiver sharply jerking a child by the arm, for example when grabbing the child away from traffic or some other danger.
the annular ligament (AL), from the posterior to the anterior margins of radial notch on the ulna, encircles the head of radius and holds it against the radial notch of ulna. [5] the accessory lateral collateral ligament (ALCL), from the inferior margin of the annular ligament to the supinator crest.
Pulled elbow; Other names: Radial head subluxation, annular ligament displacement, [1] nursemaid's elbow, [2] babysitter's elbow, subluxatio radii: Capsule of elbow-joint (distended). Anterior aspect. (Nursemaid's elbow involves the head of radius slipping out from the anular ligament of radius.) Specialty: Emergency medicine: Symptoms ...
On lateral view of the elbow, there are five radiological features should be looked for: tear drop sign, anterior humeral line, coronoid line, fish-tail sign, and fat pad sign/sail sign (anterior and posterior). [3] [8] Tear drop sign - Tear drop sign is seen on a normal radiograph, but is disturbed in supracondylar fracture. [8]
distal radius fracture with ulnar dislocation and entrapment of styloid process under annular ligament: Moore's fracture at TheFreeDictionary.com: Pipkin fracture-dislocation: G. Pipkin: posterior dislocation of hip with avulsion fracture of fragment of femoral head by the ligamentum teres: impact to the knee with the hip flexed (dashboard injury)