Medical self-drilling self-tapping fixed bone spicule
A self-drilling and self-tapping technology, which is applied in the direction of fixators, internal bone synthesis, fastening devices, etc., can solve the problems of unstable fixation of bone pins, increased bleeding during operation time, and complicated operation process, so as to improve the clamping force And the flexibility of use, the improvement of anchoring conditions, and the effect of increasing the contact area
Active Publication Date: 2011-08-17
WUHAN CONSTANT SCI & TECH
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Problems solved by technology
This method makes the operation process complicated, inconvenient to operate, the operation time and the bleeding of the patient are increased. During the drilling process, the possibility of bone necrosis caused by the high-speed rotation of the drill bit and the high heat caused by severe friction increases. Insufficient fixation or fixation failure of the fixed bone pin, and repeated operations may cause secondary injury to the patient
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[0018] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, by illustrating the advantages of the present invention, it will become clearer and easier to understand.
[0019] Referring to the accompanying drawings, it can be seen that the medical self-drilling and self-tapping fixed bone needle of the present invention includes an end drill bit blade part 1, a middle cylinder part 2, and a tail end interface part 3 in an integrated structure, and the drill bit blade part 1 includes a drill bit blade 11. , tapping blade 12 and fixed screw thread 13, tapping blade 12 is positioned between drill bit blade 11 and fixed screw thread 13, and the shape of tapping blade 12 is to gradually transition to the identical blade with fixed screw thread 13 from the flat drill bit blade 11 ( Such as figure 1 shown). ...
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The invention provides a medical self-drilling and self-tapping fixed bone needle, comprising an end drill edge part (1) with integrated structure, a middle cylinder part (2) and an interface part (3) at the tail end; the drill edge part (1) comprises a drill edge (11), a tapping edge (12) and a fixed thread (13); the tapping edge (12) is arranged between the drill edge (11) and the fixed thread (13); the shape of the tapping edge (12) is gradually transited from low and flat drill edge (11) to an edge identical to the fixed thread (13). The medical self-drilling and self-tapping fixed bone needle overcomes the shortages that the existing bone needle operation has complex process and inconvenient operation and the operation time and blood outgoing quantity of the patient are increased, etc. The medical self-drilling and self-tapping fixed bone needle can complete the operations of drilling, tapping and bone needle fixing.
Description
technical field [0001] The invention relates to a fixed bone needle used in a medical external fixator, more specifically, it is a medical self-drilling and self-tapping fixed bone needle. Background technique [0002] The fixed bone needles used by the existing medical external fixator must be drilled on the bone in advance when the operation is installed, and then tapped with a special screw tap matched with the bone needle, and finally can be installed on the bone Fixed bone pin. This method makes the operation process complicated, inconvenient to operate, and increases the operation time and bleeding of the patient. During the drilling process, the possibility of bone necrosis caused by high-speed rotation of the drill bit and high heat caused by severe friction increases. Cause the fixation of the bone pins to be unstable or fail to fix, and repeated operations may cause secondary injury to the patient. Contents of the invention [0003] The purpose of the present i...
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IPC IPC(8): A61B17/84
Inventor 张冀
Owner WUHAN CONSTANT SCI & TECH