ring fracture


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ring fracture

An annular bone fracture at the base of the posterior fossa around the foramen magnum, which is accompanied by compression fractures of vertebrae and blunt trauma to soft tissue.

Mechanism
Fall or jump from heights, usually > 5 stories, onto the feet or buttocks. If the kinetic energy is not absorbed by skeletal compression, the cervical spine is forced into the skull, breaking off a rim of occipital bone or, less commonly, impacting the cranial vault.

ring fracture

Vertical deceleration injury Trauma medicine A type of blunt trauma due to jumping or falling from heights, usually > 5 stories Clinical Injury severity score is 41–predicted survival, 50%; actual survival is less; all had multiple fractures–eg, 'ring fracture' of the skull base, separating the rim of the foramen magnum from the rest of the base and compression fractures of vertebrae, both of which occur when the victim lands on his/her feet or buttocks. See Jumper syndrome.
References in periodicals archive ?
Atlas ring fractures with > 3 parts are characterized as burst fractures, as described by Jefferson.
Axis ring fractures have been referred to as "hangman's fractures" due to the similarities with fractures seen in persons executed by judicial hanging.
While less common than dens and C2 ring fractures, C2 body fractures are not uncommon.
the C ring fracture toughness line overpredicts lifetime by ignoring this upsweep.
3 g/t Au) with strong trace-element Hg, As, and Sb are found within the high-level Cerro Palomino 'hot springs' area, and throughout other volcanic and sedimentary units located within the area of ring fractures.
The widespread gold mineralization formed during late phase epithermal activity localized along ring fractures developed during a mid-Tertiary volcanic event.
A pelvic ring fracture is a high-energy injury and should be suspected in any patient whose presenting history includes a suspicious mechanism (motor vehicle accident, crush injury, or fall from a height).
Andrich and associates (37) reviewed 108 males and females with pelvic ring fractures at their institution and found that 27 (25%) had lower urinary tract injuries (LUTI).
Cricoid and tracheal ring fractures resulting in symptomatic tracheal stenosis are complicated to treat, usually requiring resection and end-to-end anastomosis or anterior augmentation grafting using auricular or costal cartilage.
Early versus delayed fixation of pelvic ring fractures.
The quartz veins are controlled by ring fractures, and the gold is associated with anomalous As, Sb and Hg in soils.
This domal feature is marked by uplifted stratigraphy, strong alteration, brecciation, ring fractures and push-up doming structures, along with airborne magnetic geophysical anomalies.