. Orthopaedic surgery for students and general practitioners : preliminary considerations and diseases of the spine : 114 original illustrations. fication has a seat to over-come lordosis and raise either side of the pelvis means of this daily in a standing or sitting position fromfifteen to thirty minutes in each case, pressure should beexerted to correct the lateral deviation of the spine anduntwist the rotation of the ribs. (Fig. 108.) (6) The modified Lorenz roller is a padded roller onwhich the prominent ribs of the patients back rests as shestands on the floor, the arm of that
. Orthopaedic surgery for students and general practitioners : preliminary considerations and diseases of the spine : 114 original illustrations. fication has a seat to over-come lordosis and raise either side of the pelvis means of this daily in a standing or sitting position fromfifteen to thirty minutes in each case, pressure should beexerted to correct the lateral deviation of the spine anduntwist the rotation of the ribs. (Fig. 108.) (6) The modified Lorenz roller is a padded roller onwhich the prominent ribs of the patients back rests as shestands on the floor, the arm of that side surrounds theroller and the hand of the concave side grasps a bar, whichcan be moved by a crank andraise the patient from theground, causing the weight of the entire body to exert pres-sure on the prominent ribs against the padded roller. By NON-TUBERCULOUS DISEASES OF THE SPINE. 229 lying with the prominent side on the roller, the spinal curvecan be temporarily straightened and the shortened liga-ments stretched daily. (c) The Zander rocker is a machine on which the patientlies. It is divided in the middle by a pad against which the. Fig. 108. Hoffas Twister. prominent ribs rest. The arms are extended upward andgrasp a strap. The lower part is balanced by a weight andhinged so that the patient can be rocked up and down andincrease the flexibility of the spine by daily stretching. (d) Rielys modification of Beelys pressure machine con-sists of two padded supports for the upper thorax and 230 ORTHOPEDIC SURGERY. pelvis on which the patient rests face down with the thighflexed at right angles with the trunk to lessen the strap passes over the rotated ribs at the point of greatestcurvature, one end of the strap is made fast to the wall andon the other hooks are provided to put weights on up to 100pounds, which is often not found too much pressure forthese cases. By raising the wall attachment of the strapgreater correction is effected in the lateral curvature and
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