The type bone tissue device inside the medulla has, the component outside distal (2036) the opening one (20 and 24) it possesses at least in itself wall (10) with, the component outside the above-mentioned distal (2036) (10) with lining up substantially, shaft center the component outside the proximity which is located (30) with the component outside the said proximity (30) the opening one (40 and 48) possesses at least in itself wall. The component outside the above-mentioned distal (2036) (10) and the component outside the above-mentioned proximity (30) it possesses the passage inside each and itself. In addition as for the above-mentioned device, in order that the component outside the above-mentioned distal (2036) (10) sliding possibly it is received into the above-mentioned passage, in order that size the component inside distal (2036) it is set (50), and, the component outside the above-mentioned proximity (30) sliding possibly it is received into the above-mentioned passage, size the component inside the proximity which is set (70) it possesses. The extended vessel/the reduction vessel (94), in order that the component inside the above-mentioned distal (2036) (50) with the component inside the above-mentioned proximity (70) with relative longitudinal position between is modified selectively, selectively it is action possible. In addition as for the above-mentioned extended vessel/the reduction vessel, selectively long sun/size conversion or to sun/size it can convert the above-mentioned device shortly by the fact that selectively it extends or reduces and. The above-mentioned device the portable possible pin (102) has with housing position and extension position, as for the above-mentioned pin the above-mentioned distal (2036) and by the fact that the opening one in the component outside proximity penetration extending it is present at least locks the above-mentioned device during use vis-a-vis bone tissue.髄内式骨組織デバイスは、自身の壁部に少なくとも一個の開口(20、24)を有する遠位外側部材(10)と、上記
