Which method of splinting would NOT be appropriate for immobilizing a fractured hip?

Coaptation splints are specifically designed for use with fractures of the extremities, particularly in the upper and lower limbs, where they help to stabilize and align broken bones close to each other. They rely on snugly fitting against the injured area while securing it against the body, which is not suitable for hip fractures since the hip joint is much more complex and requires a different approach for immobilization.

In contrast, traction splints are specifically used for femoral fractures or, when adjusted properly, can provide effective traction and stability for the hip area. Air splints can provide some level of immobilization and support for hip injuries, though their effectiveness can be variable. Posterior splints can also be used for the lower extremities, including supporting hip fractures by providing stability.

The unique anatomical considerations and the need for appropriate alignment in hip fractures make coaptation splints ineffective in this context.