A device for measuring rib hump angle in the diagnosis of scoliosis, which comprises a frame, a plurality of stiff, laterally spaced parallel finger-like members arranged in pairs along one side of the frame with the two members of each pair equally spaced on opposite sides of the centerline of the edge, and frictionally slidable on the frame parallel to the centerline of the edge, so that when the frame edge is transverse and perpendicular to the longitudinal axis of the spine each finger-like member can be pushed into contact with the back. Means are also provided on the frame to measure the angle subtended between a first line perpendicular to the movement of the fingers and a second line intersecting the first line and passing through a selected point on the highest finger on the "high" side of the spine and the corresponding point on the other finger of the pair on the other or "low" side of the spine, so that rib hump angle can be measured directly.
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