Medicine an Surgery notes

Apr 24th, 2015
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SUPRACONDYLAR HUMERAL FRACTUREAnd Distal Humeral FracturesIntroductionAgeSupracondylar fractures are common in children between the ages of 4 and 8, following playground trauma.Mechanism of injury-A fall on to an outstretched hand is the most common mechanism of injury-Posterior displacement of the distal fragment-(extension type injury) -most common type of deformity.-Anterior displacement(flexion type) is due to direct violence with the joint in flexion.Anatomy-The ulnohumeral articulation is slightly asymmetric.- The trochlea is larger in diameter medially than laterally, and this explains the normal carrying angle.-Normal carrying angle of 11-17 of valgus angulation. -The trochlea ends more distally than the capitellum in the coronal plane, leading to a valgus position of the elbow when the arm is fully extended. -Most distal humerus intra-articular fractures split through the trochlear waist, causing comminution and often leading to narrowing of the trochlea after internal fixation. -In addition, the condyles are rotated 3-8 internally and positioned themselves in approximately 6 of valgus. -Often, the olecranon blocks adequate visualization of the trochlea a

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