Fastening system in KG combined tension belt
A fixation system and tension band technology, applied in the field of medical devices, can solve problems such as unfavorable fracture healing, easy withdrawal of needles, small longitudinal pressure, etc., to reduce skin irritation, facilitate fracture healing, and good compression effect
Inactive Publication Date: 2010-08-25
曲光 +2
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Problems solved by technology
The disadvantages are: 1. The steel needle is stressed in the horizontal direction, and the steel needle is easy to bend
2. It is easy to withdraw the needle, and the steel wire (cable) wrapped on the steel needle slips off
4. The longitudinal pressure is small, and there is a gap at the broken end, which is not conducive to fracture healing
Method used
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[0011] 1. After the fracture is reduced, the reduction forceps are fixed,
[0012] 2. Implant the guide pin and drill the hole with a hollow electric drill.
[0013] 3. Depth measurement, choose the screw with suitable length,
[0014] 4. With the help of the guide pin, screw in the inner and outer screws so that the outer screws fit into the inner screws.
[0015] 5. Penetrate the steel cable, 8-word binding,
[0016] 6. Cut off excess cables.
[0017] Note: The length of the outer screw = the length of the sliding nail body of the inner screw.
[0018] The length of the selected inner screw should be less than 0.5-1cm from the measured depth. Otherwise, after intussusception, if the end of the inner screw reaches the cap of the outer screw, it means that the head of the outer screw reaches the thread of the inner screw. At this time, there is no pressurization effect.
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The invention relates to a fastening system in a KG combined tension belt, which belongs to a medical apparatus used for orthopedics department and particularly relates to a fastening system in a hollow screw and steel cable combined tension belt. A patella fracture is presently fastened by a tension belt through steel pins and steel wires (cables), which has the following defects: (1) the steel pins are easy to bend due to stress in a horizontal direction;(2) the steel pins are easy to withdraw, and the steel wires (cables) wound around the steel pins slip off; (3) the tails of the steel pins stimulate the soft tissue; (4) and the longitudinal stress is small, the bone stump has a gap, which is not beneficial to fracture healing. After two groups of opposite hollow screws are sheathed and overlapped, the steel cables are used for bundling, so that the patella is oppositely stressed in a sliding mode. The invention has the technical points that sliding combination has small resistance, the sagittal plane is vertically stressed, and excellent stressing effect is is beneficial to fracture healing; the design of screw heads and fillisters prevents the steel wires from being cut; the design of an external thread at the tail prevents the screws from withdrawing and is convenient for taking out; and the round screw heads reduce stimulation to the skin.
Description
technical field [0001] The invention belongs to a medical device for orthopedics, in particular to a hollow nail and steel cable combined tension band internal fixation system for patella fractures. Background technique [0002] Existing patella fracture adopts steel pin and steel wire (cable) to carry out tension band fixation more. Its shortcoming is: 1, the steel needle is stressed in the horizontal direction, and the steel needle is easy to bend. 2. It is easy to withdraw the needle, and the steel wire (cable) wound on the steel needle slips off. 3. The nail tail is irritating to the skin and soft tissue, causing pain to the patient. 4. The longitudinal pressure is small, and there is a gap at the broken end, which is not conducive to fracture healing. Invention content: [0003] The object of the present invention is to provide a hollow nail and steel cable combined internal fixation system with vertical sliding pressure on the sagittal plane, reliable fixation and...
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IPC IPC(8): A61B17/68
Inventor 曲光许仁国王海奎史可强焦守国
Owner 曲光
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