| 摘要 |
An expandable bone marrow cavity fixation device comprises a hollow tubular body provided peripherally with a plurality of through holes, in each of which a diameter-adjusting element is movably disposed. An adjustment element is adjustably disposed in the hollow interior of the tubular body such that the inner end of the diameter-adjusting element is urged by the adjustment element. An urging element is rotatably disposed in the hollow interior of the tubular body such that the upper end of the adjustment element is urged by the bottom end of the urging element, and that the adjustment element can be so actuated by a rotational motion of the urging element as to force the diameter-adjusting elements to jut out of the through holes of the tubular body to bring about an increase in outer diameter of the tubular body. Located at the top of the tubular body is a pulling and fixing device fastened thereto to facilitate the pulling and the locating of the device of the present invention after the bone marrow cavity of a fractured bone is urged intensively by the outer ends of the diameter-adjusting elements. The tubular body or the adjustment element is provided with a retaining device engageable securely with a retaining element of each of the diameter-adjusting elements for preventing the diameter-adjusting elements from becoming disengaged with the through holes of the tubular body.
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