What is the posterior trimline for a TLSO?

The posterior trimline for a thoracolumbosacral orthosis (TLSO) is defined as extending from the spine of the scapula to the sacrococcygeal joint. This trimline is crucial for providing adequate support and stabilization to the thoracic and lumbar spine, particularly in managing conditions such as scoliosis, lordosis, or post-surgical support.

By placing the trimline in this location, the TLSO can effectively encompass the lower thoracic, lumbar, and sacral regions. This configuration ensures that the device can restrict abnormal motion and maintain spinal alignment while allowing for certain physiological movements as needed. This is essential for patient comfort, mobility, and rehabilitation.

Other options provide different trimline positions that may not cover the necessary anatomical regions effectively. For instance, some options might limit the orthosis's ability to support the lumbar region adequately or extend too far upwards or downwards, leading to an ineffective design for managing spinal stability.