Bilateral Locked Facets

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Bilateral Locked Facets

Normal Views

C-Spine Evaluation

Fractures and Dislocations

Facet Dislocation - Subluxation

Bilateral Locked Facets: Unstable

This results from extreme flexion of head and neck without axial compression.

It occurs with subluxation and locking of both facets, usually due to hyperflexion injury.

All ligamentous structures at the level of injury are disrupted.

There is anterior displacement of the dislocated segment at least 50% of the AP diameter of the vertebral body.

Over 90% of these patients will have neurological Injury.

Bilateral Jumped Facets at C5

Bilateral Locked Facets at C5

Findings: Severe anterolisthesis of the involved Vertebral body (Grade II-III). Both of the inferior facets of the involved vertebral body are anteriorly locked on the superior facets of the lower vertebral body. There is no abnormal rotational subluxation, only listhesis and hyperflexion at this site.

This section written by:

LCDR Ron Boucher, MC, USN
LT Hugh McSwain, MC, USN

With some assistance from:

CDR Michael Puckett, MC, USN
ENS Robert Post, MC, USNR

Approved for public release; Distribution is unlimited.
The listing of any non-Federal product in this CD is not an endorsement of the product itself, but simply an acknowledgement of the source.

Bureau of Medicine and Surgery
Department of the Navy
2300 E Street NW
Washington, D.C
20372-5300

Operational Medicine
Health Care in Military Settings
CAPT Michael John Hughey, MC, USNR
NAVMED P-5139
January 1, 2001

United States Special Operations Command
7701 Tampa Point Blvd.
MacDill AFB, Florida
33621-5323

*This web version is provided by The Brookside Associates Medical Education Division. It contains original contents from the official US Navy NAVMED P-5139, but has been reformatted for web access and includes advertising and links that were not present in the original version. This web version has not been approved by the Department of the Navy or the Department of Defense. The presence of any advertising on these pages does not constitute an endorsement of that product or service by either the US Department of Defense or the Brookside Associates. The Brookside Associates is a private organization, not affiliated with the United States Department of Defense.

Operational Medicine 2001
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