Orthopedics study guide

Apr 16th, 2015
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HUMERUS FRACTURES(Proximal & Shaft)BENJAMIN MUKULU NDELEVA05/07/2011OUTLINEEpidemiologyAnatomyPresentationInvestigationsClassificationTreatmentComplicationsPROXIMAL HUMERUSFRACTURESANATOMYShoulder fxn depends on proper alignmentand interaction of anatomical structuresFour anatomical sites: head, lesser andgreater tuberosity, shaftDisplacement of # fragments due to pullof muscles attached to the fragmentsAnatomy cont.. 2Blood supplyBoth are branches of Axillary artery Ant humeralcircumflex- Post humeralcircumflexAscending branch of ante.Circumflex humeral aa (artery ofliang) provide most blood toarticular segmentAnatomy cont 3Injury to Medial calcar of humerus mayinjure axillary arteryAxillary nerve at high risk for disruptionesp in anterior #/discloc.Anatomy cont . . . 4Subscapularis inserts on lesser tuberositycauses medial displacement.Supraspinatus and infraspinatus insert ongreater tuberosity causing superior andposterior displacement.P. major inserts on humeral shaft displacesit mediallyMechanism of injuryFall on outstreched hand (FOOSH) from astanding heightViolent muscle contractions due toconvulsions, electrical shocks and athletesDirect blow on the side of the shoulder.Incidence4%-5% of all #45% of all humeral #F:M 2:1Clinical PresentationPainSwellingD

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