The provider applies a body cast in the form of a sheepskin lined rigid vest that attaches with bars to a halo (metal ring) connected with screws to the skull. The halo body cast keeps the head and neck motionless after major spinal surgery, particularly of the cervical spine (neck area), after a traumatic injury. A halo–type body cast can also be attached to the pelvis with a pelvic hoop or to the thigh bone (femur) with pins.
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