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The rather general acceptance of the Whitman-Bradford frame as the best appliance for hyperextension of tuberculous spines leads me to describe a frame which in my experience has proved superior to it in every way for treatment of this disease in children.
The principal reasons for dissatisfaction with the Whitman modification of Bradford's appliance are obvious to those who have had experience with it, namely: (1) the impossibility of holding the kyphos up, owing to the inevitable sagging of the canvas; (2) difficulty in ascertaining the position of the kyphos after the child is strapped into place, because of the thick padding underneath; (3) the necessarily tight apron holding the patient in position, with the result that not only is breathing made difficult, but the body is flattened and compressed to such a degree that normal development is impossible; (4) bad ventilation caused by direct bodily contact with the canvas
Morrill GN. A NEW FRAME FOR TUBERCULOSIS OF THE SPINE. JAMA. 1920;74(2):99–100. doi:10.1001/jama.1920.26210020003015c