. A treatise on dislocations and fractures of the joints. onof the fore-arm, which was retained until all the swelling had gonedown. The olecranon on the opposite side had been fractured some yearspreviously, by a sword wound.* Dissection. — This fracture is usually found to have happenedthrough the centre of the olecranon ; and it is most frequently in thetransverse direction ; but I have seen the bone broken obliquely, sothat the fractured parts presented very thin edges. On that portionof the olecranon attached to the ulna there are some marks of ossificinflammation, and some veryslight tra
. A treatise on dislocations and fractures of the joints. onof the fore-arm, which was retained until all the swelling had gonedown. The olecranon on the opposite side had been fractured some yearspreviously, by a sword wound.* Dissection. — This fracture is usually found to have happenedthrough the centre of the olecranon ; and it is most frequently in thetransverse direction ; but I have seen the bone broken obliquely, sothat the fractured parts presented very thin edges. On that portionof the olecranon attached to the ulna there are some marks of ossificinflammation, and some veryslight traces of it on the de-tached portion. The cancel-lated structure of the fracturedolecranon is filled by ossific mat-ter, and is sometimes smoothedby occasional friction. The oshumeri and radius undergo nochange. In the appearance ofone case which I dissected, andof which I have given a plate,the olecranon is separated two inches from the ulna : the capsularligament of the elbow-joint is torn through on each side of the olecra- * Surgical Essays, p. FRACTURE OF THE OLECRANON. 409 non ; and the separated portion is united by a ligamentous band,which is stretched from one broken extremity of the bone to the other. The nature of this injury then is as follows. So soon as the ex-tremity of the bone is broken off, it is, by the action of the tricepsmuscle, drawn up from half an inch to two inches from the ulna, andthe extent of its separation depends upon the degree of laceration ofthe capsular ligament, and of that portion of the ligamentous bandwhich proceeds from the side of the coronoid process of the ulna tothat of the olecranon. That I might perfectly understand the natureof this accident, and the means of its reparation, I tried the followingexperiments on a dog. Experiments.—The integuments having been drawn laterally andfirmly over the end of the olecranon, I made a small incision, andplaced a knife upon the middle of that process, in a transverse direc-tion ; on str
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectfractur, bookyear1844
