An intensive study of mechanical suturing of blood vessels, and a new type of apparatus for end-to-end anastomosis1 have previously been reported by the author. A number of animal experiments as well as clinical experiences have shown this apparatus to be useful in minimizing the time for vascular anastomosis and in guaranteeing the success of the anastomosis, particularly when applied to small arteries and veins.
End-to-side anastomosis is an alternate type of technique in vascular surgery, and if this technique could be mechanically achieved simply and accurately, it might contribute a useful technique to the surgeon's armamentarium. Blakemore and Lord2 reported a nonsuture method of end-to-side anastomosis using vitallium tube. Their technique, however, has been superseded by more refined suturing techniques and to our knowledge is no longer used. An apparatus for end-to-side anastomosis of blood vessels using tantalum staples is reported to have been produced in the