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John A. Caldwell, M.D.
JAMA. 1931;96(15):1226. doi:10.1001/jama.1931.27220410002013a.
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For reducing fractures of the bones of the forearm and the metacarpals and phalanges, prolonged traction on the fingers is often necessary and it is frequently essential to maintain this traction while a plaster splint is being molded and allowed to set. The method of Böhler1 is for an assistant to make the traction manually, a mastic varnish having been applied to the fingers to prevent slipping. The disadvantage of any form of manual traction is that it is not steady and uniform because the person making the traction becomes fatigued. Soutter2 has described a device for making mechanical traction by interposing a spring balance between the points of traction, pulling until the desired weight registers on the balance, and then fastening the tractor at that point. Soutter uses a sling with a Delbet knot about the wrist and removes it from beneath the plaster. When traction on


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