Skeletal fixation device

Abstract

The invention provides a skeletal fixation device, comprising an expansion unit and a cladding unit. The expansion unit is provided with an expansion unit first end and an expansion unit second end, and comprises more than two expansion structures. The expansion structure can be switched between an expansion state and a contraction state. The cladding unit is used to wrap the expansion unit, and comprises a cladding unit first end and a cladding unit second end. The cladding unit first end is fixed on the expansion unit first end. The cladding unit second end is fixed on the expansion unit second end. When the skeletal fixation device is put in a bone, the expansion structure of the expansion unit is switched to the expansion state and stretches over the cladding unit, and a medical filler is filled in the cladding unit through the expansion unit second end.

Description

technical field [0001] The invention relates to a bone fixation device, in particular to a bone fixation device with a covering unit and an expansion unit capable of expanding and contracting. Background technique [0002] In the operation of pouring or inserting medical fillers into the bone, the current common surgical methods are as follows: [0003] Use mechanical reaming devices (such as US patents 20110196494, 20110184447, 20100076426, 20070067034, 20060009689, 20050143827, 20220052623, 6354995, 6676665) to ream the bone, create a space in the bone, take out the reaming device, , and then put into the cladding unit, and then perform the operation of pouring or stuffing the medical filler. This type of operation method has the following disadvantages: the cancellous bone (cancellous bone) fragments crushed by the mechanical reamer during reaming often fall into the mechanical reamer, causing the mechanical reamer to get stuck. As a result, the reaming component cannot...

AI Technical Summary

Problems solved by technology

This type of operation method has the following disadvantages: the cancellous bone (cancellous bone) fragments crushed by the mechanical reamer during reaming often fall into the mechanical reamer, causing the mechanical reamer to get stuck. As a result, the reaming component cannot be retracted (returned to a contracted state), causing the entire mechanical reaming device to be stuck in the reaming part and cannot be removed

This type of operation has the following disadvantages: because the hole is not reamed first, the range of perfusion cannot be accurately controlled, so that the direction of perfusion after completion may be different from the doctor's original expectation; After the filling, it was found that the cladding unit did not fully support the bone, or the medical filling flowed around in the bone, flowed out of the bone, or even the concentration of the slurry medical filling was too thin or the particle size was too small, making Unable to propel the bone smoothly when pouring medical fillings, thus greatly reducing the original effect

However, the structure of the deployment unit of this type of bone fixation device is relatively simple. Since each patient's bone hardness and bone collapse mode are not completely the same, this type of deployment unit cannot be adjusted accordingly for different patient conditions.

Furthermore, it was found during the implementation that when this type of bone fixation device is used on patients with high bone hardness, its distraction effect is not as expected

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