. The diseases of infancy and childhood : designed for the use of students and practitioners of medicine. he chair or crib it is the result of the painful nature of the rachitic process in thebones. Forcible percussion of the chest will pain. On accountof the deformity of the chest and the consequent interference with itsphysiological functions the lung is prone to contract infections suchas bronchitis and bronchopneumonia. Atelectasis is also a commoncomplication. The clavicle becomes bent and fractures on the slight-est traumatism. At the termination of the rachitic process
. The diseases of infancy and childhood : designed for the use of students and practitioners of medicine. he chair or crib it is the result of the painful nature of the rachitic process in thebones. Forcible percussion of the chest will pain. On accountof the deformity of the chest and the consequent interference with itsphysiological functions the lung is prone to contract infections suchas bronchitis and bronchopneumonia. Atelectasis is also a commoncomplication. The clavicle becomes bent and fractures on the slight-est traumatism. At the termination of the rachitic process, theclavicle and scapulse are much thickened. Virchow has shown thatthe scapula becomes the seat of an angular deformity. 236 DISEASES DUE TO DISTURBANCES OF NUTRITION Spine.—On account of the relaxation of the ligaments of the bodiesof the vertebra; and of the rachitic processes in the bodies of the bonesthemsehes, there is in most rachitic infants a bending backwardof the dorsolumbar spine (Fig. 38). The curvature is very markedwhen the infants are held in the arms. It differs from deformity due. Fig. 30.—Angular deformity of the spine, due to Potts disease, as distinguished fromthe deformity due to rachitis. to Potts disease in that it is not angular and the spine can be straight-ened and even curved forward with ease (Fig. 39). Lateral curvatures of the spine are also found. If the spinal deform-ities occur early in infancy they disappear as the rachitis healsand the ligaments and muscles regain a normal tonicity. On theother hand, should the rachitic process attack the spine late in the RACHITIS 237 third or fourth year, the deformities are perpetuated. This is espe-cially the case if the pelvis is also affected at that time (Monti). Pelvis.—The pelvic deformities which result from rachitis arechiefly flattening of the pelvis, and the pseudo-osteomalacic pelvis. Upper Extremities.—The epiphyses are much swollen and, in rarecases, painful. The wrist is flat and muc
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