. A treatise on dislocations and fractures of the joints. hat caused the displacement. More-over, under either of these accidents, the motions of the elbow-joint are but slightlyinterfered with, although those of the radio-ulnar articulation are entirely lost, andthe possibility of pronation and supination consequently precluded.—Ed. t The olecranon, says Boyer, is in this dislocation placed higher than theexternal condyle, instead of being on a level with it, as it naturally is. 382 DISLOCATION OF THE RADIUS AND ULNA of the olecranon appears a hollow. A considerable hard swelling isfelt at th
. A treatise on dislocations and fractures of the joints. hat caused the displacement. More-over, under either of these accidents, the motions of the elbow-joint are but slightlyinterfered with, although those of the radio-ulnar articulation are entirely lost, andthe possibility of pronation and supination consequently precluded.—Ed. t The olecranon, says Boyer, is in this dislocation placed higher than theexternal condyle, instead of being on a level with it, as it naturally is. 382 DISLOCATION OF THE RADIUS AND ULNA of the olecranon appears a hollow. A considerable hard swelling isfelt at the fore part of the joint, immediately behind the tendon of thebiceps muscle, formed by the lower extremity of the humerus ; thehand and fore-arm are supine, and cannot be rendered entirely flexion of the joint is also in a great degree lost. Dissection.—I have had an opportunity of dissecting a compounddislocation of this joint, in which both the radius and ulna were thrownbackwards, and the parts are preserved in the museum at St. Thomass. Hospital. The coronoid process of the ulna was thrown into theposterior fossa of the os humeri, and the olecranon projected at theback part of the elbow, an inch and a half above its usual situation ;the radius was placed behind the external condyle of the os humeri,and the humerus was thrown forwards on the anterior part of the fore-arm, where it formed a large projection. The capsular ligament wastorn through, anteriorly, to a great extent. The coronary ligamentremained entire. The biceps muscle was slightly put upon the stretchby the radius receding; but the brachialis internus was excessivelystretched by the altered position of the coronoid process of the ulna. In another case which was dissected, neither the muscles about thejoint, nor the coronary ligament were torn ; but the anterior portionof the capsular ligament was extensively lacerated. Causes.—This accident usually happens in a fall when a personputs out his hand
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectfractur, bookyear1844
