. A practical treatise on fractures and dislocations. ie betweendislocation and fracture of the clavicle near its end, and this may beanswered by tracing the outline of the acromion, comparative meas-urements of the two clavicles, and consideration of the presence or ^ Klar : Doutscho Zoitscluilt fur Chir., vol. Ixxiii. p. OSJ. 600 LISLOCATIOKS. absence of signs peculiar to fracture. The error of mistaking theinjury for a dislocation of the shoulder appears to have been quitefrequently made, although it is difficult to understand how it couldoccur if the examination were thorough. A contusion
. A practical treatise on fractures and dislocations. ie betweendislocation and fracture of the clavicle near its end, and this may beanswered by tracing the outline of the acromion, comparative meas-urements of the two clavicles, and consideration of the presence or ^ Klar : Doutscho Zoitscluilt fur Chir., vol. Ixxiii. p. OSJ. 600 LISLOCATIOKS. absence of signs peculiar to fracture. The error of mistaking theinjury for a dislocation of the shoulder appears to have been quitefrequently made, although it is difficult to understand how it couldoccur if the examination were thorough. A contusion or sprain of a joint in which the end of the claviclestood abnormally high might easily be mistaken for a recent disloca-tion, since it Avould present all the signs of one, but the error wouldbe of sliglit importance and would cause no harm to the patientbeyond perhaps a needlessly prolonged confinement of the limb. Prognosis. The prognosis in the incomplete form is good, foralthough the displacement has commonly persisted in some measure, Fig. Complete supra-acromial <iislocation of the clavicle. the resulting deformity is slight. In the complete form, with marked dis-placement, there is, in addition to the common imperfect maintenanceof the reduction, an occasional inability even to make reduction. Insuch cases the functions of the limb may or may not be seriously inter-fered with by the persistence of the displacement. In the unique casequoted above from Hamilton, of dislocation by direct violence actingupon the clavicle from below upward, the bone remained displaced twoinches upward, yet the patient could use the arm as freely and stronglyas the other. On the other hand, in one of Bardenheuers cases, in whichthe displacement persisted, the diminution of function was considerable,and the power of abduction of the arm was almost entirely lost. DISLOCATIONS OF THE CLAVfCLE. 601 Treatment. In most cases tlie reduction of even the com[)lete dislo-cation can be readily e
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