Injuries & Diseases of the Bones and Joints

Injuries & Diseases of the Bones and Joints

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1921 edition. Excerpt: ...lary canal is not often involved, but with the localized osteitis we may have an extensive periostitis, Fig. 177. When the infection starts in the joint we have extensive destruction of both articulating surfaces, and finally the disease breaks through one of the cartilaginous surfaces and destroys to a more or less degree the head of the bone where the cancellous bone is present; and again the infection extends but slowly into the medullary canal proper. Cartilage is quite resistent to infection, and it is only the more virulent organisms, such as streptococcus, ete., that produce such conditions, Fig. 178. In compound fractures (Fig. 179) the infection is carried directly to the medullary cavity and raw, exposed bone surfaces, so that periosteum, cortex and medullary canal may be involved simultaneously. The question naturally arises: "Does osteomyelitis give us a constant roentgenological picture?" The answer must be, "No," but this answer may be qualified by stating that the pathologic process is the same, varying only as to the intensity and duration of the infection. Hence, if we understand the fundamental principles of bone infection, while the picture may vary, yet the condition may be recognized. Only two changes may be seen upon a plate upon which to base a diagnosis--bone destruction and bone production. The variation in these two processes constitutes the basis of a diagnosis. Attention has been called to the fact that the dense, compact bone is pierced by numerous small Haversian canals, and that these are in direct connection with the medullary canal. Now an infection that starts in the medullary canal not only extends up and down, but also enters the Haversian canals; and since these canals extend...
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Product details

  • Paperback | 58 pages
  • 189 x 246 x 3mm | 122g
  • United States
  • English
  • black & white illustrations
  • 1236810929
  • 9781236810922