Park and Moreau described successful excision of diseased joints, particularly the knee and elbow, and Jeffray explained that the chain saw would allow a smaller wound and protect the adjacent muscles, nerves, and veins. In it, Jeffray reported having conceived the idea of a saw "with joints like the chain of a watch" independently very soon after Park's original 1782 publication, but that he was not able to have it produced until 1790, after which it was used in the anatomy lab and occasionally lent out to surgeons. Moreau, with additional observations by Park and Jeffray. Park in 1782 and a translation of an 1803 paper by French physician P. In 1806, Jeffray published Cases of the Excision of Carious Joints, which collected a paper previously published by H. It was illustrated in the second edition of Aitken's Principles of Midwifery, or Puerperal Medicine (1785) in the context of a pelviotomy. 1783–1785) by two Scottish doctors, John Aitken and James Jeffray, for symphysiotomy and excision of diseased bone, respectively. A "flexible saw", consisting of a fine serrated link chain held between two wooden handles, was pioneered in the late 18th century (c. The origin of chain saws in surgery is debated. Historical osteotome, a medical bone chainsaw
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