Abstract: A cage interposed between a pair of vertebral bodies, wherein both left and right side surfaces of a cage body are formed in a smooth surface, both upper and lower surfaces of the cage body are provided with a large number of projections arranged in a longitudinal direction and a lateral direction, tip end surfaces of the large number of projections substantially match with a virtual arc curved surface formed around an axis in the longitudinal direction, and angles of inner end edges of the projections close to left and right side surfaces are more acute. A longitudinal through hole is formed in the cage body in its longitudinal direction so as to penetrate the cage body, and both left and right side surfaces and both upper and lower surfaces of the cage body are provided with communication holes which are in communication with the longitudinal through hole. The communication holes are circular holes having a common diameter.

Abstract: A cage interposed between a pair of vertebral bodies, wherein both left and right side surfaces of a cage body are formed in a smooth surface, both upper and lower surfaces of the cage body are provided with a large number of projections arranged in a longitudinal direction and a lateral direction, tip end surfaces of the large number of projections substantially match with a virtual arc curved surface formed around an axis in the longitudinal direction, and angles of inner end edges of the projections close to left and right side surfaces are more acute. A longitudinal through hole is formed in the cage body in its longitudinal direction so as to penetrate the cage body, and both left and right side surfaces and both upper and lower surfaces of the cage body are provided with communication holes which are in communication with the longitudinal through hole. The communication holes are circular holes having a common diameter.

Abstract: A blood collecting apparatus for collecting and reserving blood lost from the patient during or after operation, wherein thrombus contained in the collected blood is removed, and it is possible to prevent the new generation of the thrombus. The apparatus may readily be used safely. The apparatus includes a blood collecting container, a suction pipe having a branched pipe provided with a sterilizing filter, a collecting pipe provided with a port for supplying a blood anti-coagulant and a blood filter, and a discharge pipe having a blood filter. These pipes are connected to an upper part of the container. A suction unit is connected to an end portion of the suction pipe. A catheter or the like is connected to the end of the collecting pipe. The section unit is operated to suck and collect the blood from the incision during or after the operation.