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 ?
Data including the age, sex, cause for intubation and tracheostomy, days of intubation/ventilation, APACHE II Score, duration of procedure, lowest intraprocedural SpO, lowest intraprocedural BP, intraprocedural complications such as bleeding, loss of airway for more than 20 seconds, subcutaneous emphysema, tracheal ring fracture and paratracheal placement of the tube; postprocedural complications such as accidental decannulation, pneumothorax, hemorrhage, stomal granulation, infection of stoma or a new lung infiltrate within 48hours of tracheostomy; duration of tracheostomy; planned decannulation and mortality were recorded.
Adolescent apophyseal ring fracture simulating lumbar disc herniation: a case report.
Atlas ring fractures with > 3 parts are characterized as burst fractures, as described by Jefferson.
Under these conditions there is a greater risk of failure due to inner ring fracture.
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.
Based on these data, we determined the instability of the pelvis as an atraumatic rotational unstable pelvic ring fracture with a predominantly ligamentous insufficiency and a transiliac instability.
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).
Numerous gold-bearing outcrops have been found along the bounding ring fracture system.
According to New Concept's geologist, holes drilled adjacent to those of the discovery fan, and the fan itself, with offsets of 15 feet between holes, indicate the two gold zones may be of the same depositional sequence in time, but occupy separate fault structural zones, the latter truncating the former and possibly representing a mineralized cauldera-related ring fracture complex.
described a bilateral testicular dislocation presenting with a Tile B1 pelvic ring fracture [1] and Smith et al.
There appears to be a ring fracture associated with the margin of the magnetic anomaly which is reflected on the Radarsat image.