Julius H. Jacobson II of the University of Vermont in 1960. Using an operating microscope, he performed coupling of vessels as small as 1.4 mm and coined the term microsurgery. Hand surgeons at the University of Louisville, Drs. Harold Kleinert and Mort Kasdan, performed the first revascularization of a partial digital amputation in 1963.

Nakayama, a Japanese cardiothoracic surgeon, reported the first true series of microsurgical free-tissue transfers using vascularized intestinal