For any Hunters, Wilderness hikers, Medical professionals here.
This here be a simple Deer-drag "sled" with a few modifications to permit secure restraint/ retention of an average adult human.
In theory, this allows for a Single-Rescuer Extraction with the option of Hands-Free operation by simply attachment of a high-tensile rope/ cordage/ chain/ hook to the rope-loop at the "head-of-the-sled".
Better for "Care-under-Fire" First Aid [C.u.F.F.] operations.