A self-made single-site access system. (a) The circular stapler passed through the glove. (b) The stapler, jejunal stump, and loop were fixed by the silk string. (c) A slipknot was made to fix the shaft. (d) Establishment of the pneumoperitoneum by the self-made single-site access system. (e) Schematic of making a slipknot using a silk string. (f) Schematic of making a surgical knot to the center rod. Red arrow points to the silk suture. The knot was released automatically during firing of the stapler without additional cutting.