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Monteggia fracture : ウィキペディア英語版
Monteggia fracture

The Monteggia fracture is a fracture of the proximal third of the ulna with dislocation of the head of the radius. It is named after Giovanni Battista Monteggia.〔G. B. Monteggia. Istituzioni Chirurgiche. Vol 5. Milano, Pirotta & Maspero, 1814.〕
==Causes==
Mechanisms include:
*Fall on an outstretched hand with the forearm in excessive pronation (hyper-pronation injury). The Ulna fractures in the proximal one-third of the shaft due to extreme dislocation. Depending on the impact and forces applied in each direction, degree of energy absorption determines pattern, involvement of the radial head and whether or not open soft tissue occurs.
*Direct blow on back of upper forearm would be a very uncommon cause. In this context, isolated ulnar shaft fractures are most commonly seen in defence against blunt trauma (e.g. nightstick injury). Such an isolated ulnar shaft fracture is ''not'' a Monteggia fracture. It is called a 'nightstick fracture'.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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