History of chain saw Part Ⅰ

The origin of the chain saw is debated, but the chainsaw-like tool, is carried out around 1830 by the German orthopedic surgeon Bernhard Heine. This instrument, osteotomes having to carry a chain link having an edge disposed at an angle smaller cutters; guide vanes chain sprocket is rotated around the handle movement. 

As the name suggests, it is used to cut the bone. Today saw the familiar prototype chain timber industry in the late 18th century by two Dr. Su Gelan John Aitken and James Jeffray initiative for symphysiotomy and resection were diseased bone. Chainsaw hands, which cut the concave side serrulate chain, around 1783-1785 the invention. It is the principle of delivery or puerperal Medicine (1785) description of Aitken and use him in his dissection room. Jeffray chain claims to have conceived the idea of ​​an independent looked around at that time, but it was 1790 before he was able to have it produced. In 1806, Jeffray published H. Morrow Park and PF joints caries removal embodiment MD comments by James Jeffray. In this communication, the park Morrow 1803 paper he translated and Morrow described the lesion resection joint success, especially in the knees and elbows. 

Jeffray explained that the chain saw will allow small wound to protect the adjacent neurovascular bundle. Although the concept of the hero, symphysiotomy, for most obstetricians are too many complications, but the idea Jeffray recognized, particularly the development of post-anesthetic. Mechanized version of the chain saw has been developed, but in the later 19th century, surgery to replace the unlucky twist wire saw. For many of the 19th century, however, the chain saw is a useful surgical instruments.

To be continued...



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