Definition of Orthosis, thoracolumbosacral (TLSO)

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Orthosis, thoracolumbosacral (TLSO): One of the two main types of braces used to correct the lateral (sideways) curve of the spine in scoliosis. Patients can wear this brace to correct spinal curves whose apex is at or below the eighth thoracic vertebra. The TLSO is an underarm brace, which means that it fits under the arm and around the rib cage, lower back, and hips.

The other main types of brace for treating the spine in scoliosis is the Milwaukee brace which can be worn to correct any curve in the spine.

All braces for scoliosis can be custom made or can be made from a pre-fabricated mold. All braces must be selected for the specific curve problem and fitted to each patient. To have their intended effect, the brace must be worn every day for the full number of hours prescribed until the child stops growing.