ABSTRACT
A method of U-shape sleeve anastomosis for small arteries was introduced. 40 femoral arteries of rats with the diameters of 0.5-1.0mm and the average of 0.6mm were anastomosed with this method. The flap survival, the angiography of the small arteries anastomosed, the morphological observations of the vessels under operation microscope, and the histological studies were performed 7 hours, and 3, 7, 15, and 30 days postoperatively. It was found the long-term patency rate of the anastomosed arteries was 100%. Comparison was made between this U-shape sleeve anastomosis and the sleeve anastomosis of Lauritzen.Certain problems such as the early narrowing of the vascular lumen and the important points during operation were discussed. It is believed that this U-shape sleeve anastomosis is a simple and time-saving technique yielding high patency rate in small artery anastomosis.
ABSTRACT
The results of living iliac bone graft with microvascular anastomosis in 12 dogs were studied with microangiographic examination. Another 8 dogs with iliac bone graft without vascular anastomosis were also observed as the control. In 11 dogs with patent anastomosed vessels, microvessels were found to have distributed in the grafts two weeks after surgery. The majority of the microvessels in the newly formed bone which connected the graft and the host bone came from the graft and its periostium, only a small part of those originated from the host bone. This indicated that the bone grafts were surviving and participated in the healing process. In the dogs grafted without anastomosis, no microvessel was found in the specimens in the first four weeks after operation, only after 8 weeks, was a scanty amount of microvessels seen to have grown into the grafts from the surrounding soft tissues. This again proves that the "creeping substitution" of the vessels in the grafted bone which occurs in the conventional method of bone graft is very slow.