Sentence:  For three months after the operation the patient remains recumbent in the original bent jacket. Then he is allowed to walk in a <WSD>body jacket</WSD> applied so as to produce a slight list of the trunk toward the convexity of the primary curve. 
Meaning of the word marked with <WSD> tags:  A rigid brace that fits around the torso (but does not cover the neck, arms or legs) to immobilize the spine, reduce curvature, etc.