Histological Studies on the Healing Process in Intestinal Anastomosis by Compression Ring Anastomotic Device, AKA-2

Akira Kaneko, Kuniyasu Yamashita, Takuro Ogata

Department of Surgery, Kochi Medical School

AKA-2, a USSR-made anastomotic device, whose feature is using compression rings instead of staples, is currently used in some clinics. By using the colons of 48 adult mongrel dogs, the healing process in AKA-2 intestinal anastomosis, which has not yet been pricisely reported, was examined by histology, microangiography and the pressure resistance test. Three dogs died due to anastomotic leakage but the others showed no serious complications. The compression rings were usually expelled between the 3rd and 5th days. Histologically, a slight inflammatory cell reaction was observed at the anastomotic site, but a severe inflammatory process or abscess formation did not occur. Pronounced proliferation of fibroblasts appeared from the 3rd day and the wound healing was almost completed on the 7th day. Throughout all healing processes, stenosis and excessive granulation formation were not observed. Microangiographic study showed that cross blood flow at the anastomotic area appeared on the 5th day and was increased on the 7th day. The mean pressure resistance also increased to 257±11.4 mmHg on the 7th day. The present study shows that AKA-2 is a useful device for intestinal anastomosis, since it does not leave any foreign materials such as staples. It ensures the quick wound healing of the layer-to-layer formation with no stenosis.

Key words
auto suture, AKA-2 device, intestinal anastomoses

Reprint requests
Akira Kaneko Department of Surgery, Kochi Medical School
Oko-cho, Nankoku-shi, 783 JAPAN

Accepted
October 11, 1990

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