Patent ID: 6896677

Claim:
A vertebral retrieval device comprising: a retrieval rod which is used to retrieve spinal segments under treatment; a fixation seat provided with a receiving slot for receiving the retrieval rod, said receiving slot being provided on two opposite side walls with a retaining recess, and in a bottom with a through hole; a fastening screw is provided with a spherical head made integrally therewith, wherein said spherical head is rotatably received in said fixation seat when said fastening screw is inserted into said through hole of said fixation seat; a C-shaped ring provided with a concave down surface on one side, said C-shaped ring being able to be elastically deformed, received in said fixation seat and retained in said fixation seat by an expansion force resulting from said deformation, while said concave down surface resting on the spherical head of said fastening screw and another side of said C-shaped ring being adapted to receive said retrieval rod; a fixation assembly comprising a rotary fixation element provided with a threaded through hole, and two retaining edges opposite to each other; a pressing element having a projection at one side and a groove at another side; and a pressing screw having a round hole adapted to receive said projection of said pressing element, wherein said rotary fixation element is engaged with said fixation seat such that the two retaining edges are retained in said retaining recesses of said fixation seat, said pressing screw is threadably engaged in said threaded through hole of said rotary fixation element, and the pressing element is able to be pressed against said retrieval rod by threading said pressing screw, when the groove of said pressing element rests on said retrieval rod and said projection of said pressing element is received in said round hole of said pressing screw.