In what position should the measurement for a TLSO be taken?

Taking measurements for a TLSO (Thoraco-Lumbo-Sacral Orthosis) in the lying supine position is optimal for several reasons. In this position, the spine is more relaxed, which allows for more accurate measurements of the trunk and pelvis, as it minimizes any effects of gravity or muscle tension that can occur when the body is upright.

Lying supine also helps in evenly distributing the weight of the thoracic and lumbar regions, leading to a more accurate assessment of alignment and curvature of the spine. This is especially critical when designing a custom TLSO that needs to provide effective support and immobilization in the appropriate areas while also accommodating any specific anatomical considerations of the patient.

Other positions, such as sitting upright or standing straight, could introduce postural variances that affect the measurement due to the involvement of gravity and muscular tension. Leaning forward can also alter the alignment of the spine and pelvis, which could lead to inaccuracies in fitting the orthosis. Therefore, the supine position is the most reliable for achieving precise and effective measurements for a TLSO.