Abduction fracture

Introduction Abductive fractures: upper limb abduction during fall, palms on the ground, and indirect violent upward conduction leading to fractures. The proximal end of the fracture is adducted and distally abducted, forming a forward or inward angular deformity or a misaligned deformity. More common in clinical practice. On weekdays, we should pay attention to the safety of production and life and avoid trauma. Pain in the shoulder after injury, swelling, ecchymosis, upper limb movement disorder. Examination can reveal localized tenderness. X-ray film can confirm the presence and displacement of the fracture. Commonly, the proximal end of the fracture is retracted, the gap between the greater humerus and the shoulder is widened, and the humeral head is rotated. The lateral cortical bone of the distal humerus is inserted into the proximal medullary cavity, showing an angular deformity of the outcrop; The folded ends are displaced inward and upward to be overlapped. Regardless of the displacement, it is possible to combine inward, forward lateral displacement and angular deformity.

Cause

Causes of abductive fractures: upper limb abduction during fall, palm landing, indirect violent upward conduction leading to fracture. Caused by indirect violence. When falling, the palm is on the ground, the violence is transmitted from the bottom to the top, the body leans forward or the side falls to the ground. If the affected limb is in the outreach position, an abduction fracture occurs. Then, due to direct violence or external impact, striking, etc., the local fractures are abducted.

an examination

Related inspection

Bone imaging and joint MRI examination

1. Diagnosis of abductive fracture: the proximal end of the fracture is adducted and the distal abduction is formed, forming a forward or inward angular deformity or a misaligned deformity. More common in clinical practice.

2. Abductive injury: The fracture line seen in the positive position of the line is transverse, the fracture is slightly inward or outward, and the distal end is adducted or abducted. There was no obvious forward or backward angulation and misalignment on the lateral slices. Surgical neck fractures of the humerus often involve fractures of the punctatus and large nodules, which are characterized by avulsed butterfly fractures.

Differential diagnosis

Differential diagnosis of abduction fractures:

1. Smaller direct violence can produce fractures; if the palm touches the ground when falling, the smaller indirect violence will conduct upwards, resulting in a non-displaced insertion fracture.

2. Abductive fractures: upper limb abduction and palm landing on the fall, and indirect violence leads to fracture. The proximal end of the fracture is adducted and distally abducted, forming a forward or inward angular deformity or a misaligned deformity. More common in clinical practice.

3. Adduction fracture: Contrary to the abduction fracture, the hand or elbow touches the ground during the fall, the upper limb is adducted, the proximal end of the fracture is abducted, and the distal end is adducted, forming an outward angular deformity. Less common.

The proximal end of the fracture is adducted and distally abducted, forming a forward or inward angular deformity or a misaligned deformity. More common in clinical practice.

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