4 results about "Internal bone fixation" patented technology

This invention provides an internal fixation device for cancellous bone, belonging to the field of medical device technology. It includes a fixation plate with a plurality of screw holes and positioning holes arranged in a linear array on its top outer wall; and a guide assembly connected to the fixation plate, used to guide the hollow self-drilling screws. By incorporating the guide assembly, this invention not only guides the hollow self-drilling screws, preventing them from deviating from their pre-operatively assessed position during insertion, thus affecting their fixation effect on the fracture site, but also holds the screws during the guiding process, preventing the screw head from tilting and protruding, which could cause skin irritation and affect postoperative recovery.

The invention provides a cancellous bone internal fixing device, and belongs to the technical field of medical instruments. Comprising a fixing steel plate, a plurality of screw holes and a plurality of positioning holes are formed in the outer wall of the top of the fixing steel plate, and the screw holes and the positioning holes are distributed in a linear array mode; and the guide assembly is used for guiding the hollow self-drilling screw, and the guide assembly is connected with the fixed steel plate. By arranging the guiding assembly, the hollow self-tapping screw can be guided, the situation that the fixing effect of the hollow self-tapping screw on the fracture position of a patient is affected due to the fact that the hollow self-tapping screw deviates out of the designated position of preoperative evaluation in the screwing-in process is avoided, the hollow self-tapping screw can be held in the guiding process, and the fracture position of the patient is not affected. In this way, the situation that the screw head protrudes due to inclination, skin irritation is caused, and then postoperative recovery is affected can be avoided.

Devices and methods for separating a catheter from an internal bone fixation implant are disclosed herein. According to aspects illustrated herein, there is provided a catheter cutter device comprises: a first tubular member having a proximal end, a distal end, and a lumen extending therethrough, wherein the proximal end of the first tubular member includes a threaded shank portion and a plain shank portion, wherein the plain shank portion of the first tubular member is configured to connect the first tubular member into a chuck of a drill, and wherein the distal end of the first tubular member terminates in a cutting head comprising a cutting blade; and a second tubular member having a proximal end, a distal end, and a lumen extending therethrough, wherein the proximal end of the second tubular member includes a handle having internal threads.

The utility model relates to the technical field of orthopedic surgery, and discloses a calcaneus internal fixation screw placement guiding device which comprises a supporting frame, a guiding sleeve and a locking piece. The supporting frame is fixed to the skin surface of a patient and corresponds to the calcaneus in position. The supporting frame comprises a middle connecting block, a left positioning block, a right positioning block and an upper positioning block. The three guide sleeves are located in straight notches A formed in the left positioning block, the right positioning block and the upper positioning block respectively, the angle of the guide sleeves is adjusted in the straight notches, the guide sleeves are locked and positioned through locking pieces after angle adjustment, the angle of the guide sleeves can be adjusted, and the diameter and the position of a guide hole are designed according to the size and the path of an internal fixation screw; an operator can adjust the position of the guide arm or the guide rod according to fracture types and screw placement requirements. Through the virtual space bone nail planning path, the guiding device ensures that the screw can be accurately placed along the preset path, and the risk of operation errors is reduced.