The halo vest orthosis (Fig. 18-9) stabilizes the cervical spine by fixing the skull in reference to the chest through an external mechanical apparatus. A rigid ring is fixed about the periphery of the skull. A snug-fitting fleece-lined plastic vest immobilizes the chest. Adjustable rods and bars stabilize the ring and vest with respect to each other. This orthosis provides the most effective restriction of cervical motion, especially for the upper cervical region. Traction may be applied to the cervical spine by use of turnbuckles.
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