Ensure that the Kirschner wires or reduction forceps will not interfere with subsequent plate placement. Basic Anatomy The humerus is the long bone in the upper arm. This is important to know because the brachial artery runs anterior to this bone. These are severely disabling problems for the patient and a challenge for the treating physician. (OBQ09.138) A 33-year-old male sustains a distal humerus fracture and is treated with open reduction and internal fixation of the distal humerus with olecranon osteotomy. humerus, humeral shaft, and distal humerus. Distal humerus. In addition to the areas mentioned above, the humerus is made up of other parts, too. The humerus is the single bone of the upper arm. Key Terms. – When using the dorsolateral plate without lateral support, it is important to reduce and fix the articular block with In Type I fractures, the lateral trochlear ridge remains with the intact condyle, providing medial to lateral elbow stability. However, nonunions of the distal humerus still occur. This fracture is generally caused due to a high energy impact. The ulna is a long bone in the forearm. Total elbow replacement (arthroplasty). The broken pieces of bone may line up straight or may be far out of place (displaced fracture). anatomy of the distal humerus is restored. http://www.interactive-biology.com - When looking at the bones of the arm and forearm, the first bone we need to look at is the distal humerus. The humerus begins proximally as a rounded head and joins the greater and lesser tubercles via the anatomical neck of the humerus. humerus: The bone of the upper arm. anatomy of the distal articular surface of the humerus. • Lateral decubitus positioning during ORIF facilitates reconstruction • The trochlear axis is 3-8 degrees externally rotated – (Least important to worry about if cartilage reconstructed) – Reason it is difficult to get a true lateral radiograph 35-40 Deg. What most commonly happens is that the distal fragment displaces backwards. Functional Anatomy • The distal humerus angles forward - like a hockey stick! A distal humerus fracture occurs when there is a break anywhere within the distal region (lower end) of the humerus. The lateral trochlear ridge is the key to analyzing humeral condyle fractures. Humerus Anatomy : Bony Landmarks & Muscle Attachment. Epiphyseal. Digital radiographs were obtained to determine the course of the radial nerve in the distal 20 cm of the humerus in relation to bony landmarks; medial epicondyle and capitellum-trochlea projection (CCT). A humerus fracture is a break in the large bone of your upper arm. 2. When viewed from an anterior or posterior position, the distal humerus appears to be shaped like a triangle. ANATOMY AND CLASSIFICATION OF DISTAL HUMERAL FRACTURES. Background: The optimal articular shape for distal humeral hemiarthroplasty has not been defined because of a paucity of data quantifying the morphology of the normal distal humerus. Open subtypes (2) Courses and events. There are also nerves, arteries, and veins going up and down along the bone. Mohan N, Hunter JB, Colton CL: The posterolateral approach to the distal humerus for open reduction and internal fixation of fractures of the lateral condyle in children. It will fracture here and this portion, the distal fragment will slip backwards and the proximal humerus, this proximal fragment will slip forward. The humerus is described as having a proximal region, shaft, and distal region. This is the procedure most often used to treat distal humerus fractures. 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