CN213606791U - Internal fixing device for patellar lower fracture - Google Patents

Abstract

The utility model discloses an internal fixing device for patella lower fracture, which comprises a fixing steel claw and a fixing part; the near end of the fixed steel claw is connected with an extended block body, and a limit hole is processed on the block body; the structure is the single-point location through locating component to and carry out the overall positioning through the mode of drawing the steel wire between each locating component, the stability of overall positioning has been strengthened, and still be provided with a fixed steel claw in the main part, fixed steel claw is through drawing the fixing in kneecap department of steel wire and self-tapping screw, the fixed of each ossicle piece of comminuted fracture has been stabilized on the one hand, on the other hand through with the kneecap main part fixed with laminating very big degree the improvement the stability of overall fixation.

Description

Internal fixing device for patellar lower fracture

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to internal fixation device for patella lower fracture.

Background

The inferior pole of the patella refers to the part of the patella 1/4 without articular cartilage coverage, is about 1.5cm long, and does not participate in the patellofemoral joint. The patella lower pole is hidden in a patellar ligament (patellar tendon) and a patellar lower fat pad, is connected with the patellar tendon, and conducts the muscle force of the quadriceps femoris muscle to the tibial tuberosity, thereby completing the knee stretching movement. Very cancellous bone under the patella, the fracture is mostly comminuted fracture, and the light person of crushing degree can have several big fracture pieces, and serious person's fracture piece is tiny numerous, still adheres to through the patellar tendon and gathers together, and very patellar tendon dead point under the patella, stress relatively concentrates, and the selection direct influence knee joint function of fracture characteristic and operation mode resumes, and its treatment principle mainly is: the knee stretching device is recovered in continuity, the length of the patella is kept as much as possible, and the knee stretching device is effectively and reliably fixed in the interior to achieve early functional exercise. The currently adopted operation method mainly comprises the steps of fracture incision reduction internal fixation, wherein internal fixation materials mainly comprise devices such as a Kirschner wire tension band, patella claws, a basket net steel plate and the like; because the lower-pole fracture is multi-position comminuted fracture, the fracture cannot be effectively and completely fixed by the operation of the Kirschner wire tension band, and fracture blocks easily fall into the knee joint cavity to form loose bodies, thereby seriously affecting the function of the knee joint. The fracture piece is smashed in excision, can cause the kneecap to be defective, the length is shortened, has the wrong check phenomenon of kneecap femoral joint, and the fixed mode of kneecap claw and basket net steel sheet, it is very easy to appear fixed unreliable, and not hard up can appear in too early rehabilitation training to lead to fracture department to shift again, need operation once more when serious, increased patient's misery and influenced the recovery.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides an internal fixing device for patella lower fracture, which improves the operation fixing stability of the lower fracture,

the utility model provides an internal fixing device for patella lower fracture, which comprises a fixing steel claw and a fixing part; the fixed steel claw near-end is connected with the block of an extension, and processing has a spacing hole on the block install an adjusting part in the spacing hole, and the distal end of fixed steel claw is for embracing claw column structure, the fixed part includes a plurality of locating component and traction wire, traction wire passes adjusting part and establishes ties with each locating component, the adjusting part pulling traction wire is tightened.

Preferably, the adjusting member includes a tapping screw, a threaded cavity is formed in a central portion of the tapping screw, a tap is threadedly coupled in the threaded cavity, and the traction wire is fixed to the tapping screw through the tap.

Preferably, the cock comprises a body formed with an external thread, a through hole formed at a top end portion of the body in a diameter direction thereof, the through hole allowing the traction wire to pass therethrough, and symmetrical smooth recesses formed at both end edges of the through hole, respectively.

Preferably, the positioning assembly comprises a self-tapping screw, a limiting plug is movably connected in the self-tapping screw, and a U-shaped communication groove allowing a traction steel wire to pass through is reserved on the limiting plug.

The beneficial effects of the utility model are embodied in: the utility model discloses a structure is the single-point location through locating component to and carry out the whole location through the mode of pulling the steel wire between each locating component, the stability of whole location has been strengthened, and still be provided with a fixed steel claw in the main part, fixed steel claw is through pulling steel wire and self-tapping screw's fixing in kneecap department, the fixed of each ossicle piece of comminuted fracture has been stabilized on the one hand, on the other hand through with the kneecap main part fixed with laminating very big degree the improvement whole fixed stability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a front view of an internal fixation device for fixing a fractured patella according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a positioning assembly according to an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of an adjusting member according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a fixed steel claw according to an embodiment of the present invention;

FIG. 5 is a top view of the positioning assembly of FIG. 2;

fig. 6 is a top view of the adjustment member of fig. 3.

In the drawing, a fixed steel claw 1, a traction steel wire 2, a positioning assembly 3, a limiting plug 31, an adjusting component 4, a cock 41, a through hole 42 and a notch 43.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1, wherein the fracture part is a schematic view of the fracture position of the patella, the internal fixing device for the patella lower pole fracture comprises a fixing steel claw 1 and a fixing part; the utility model discloses a steel claw traction device, including fixed steel claw 1, fixed steel claw 2, fixed steel claw 1 near-end is connected with the block of an extension, and processing has a spacing hole on the block install an adjusting part 4 in the spacing hole, and the distal end of fixed steel claw 1 is for embracing claw column structure, the fixed part includes a plurality of locating component 3 and traction wire 2, traction wire 2 passes adjusting part 4 and establishes ties with each locating component 3, adjusting part 4 pulling traction wire 2 tightens.

In the above embodiment, as shown in fig. 4, the fixing steel claw 1 is made of medical stainless steel, the fixing steel claw 1 is fixed on the patella, the small displaced fracture block is gathered by the action of the fixing steel claw 1, the positioning component 3 is connected to the large fracture block, the fracture block is gathered by pulling the traction steel wire 2, the adjustment component 4 is tightened and stabilized, the fixing steel claw 1 is stably fixed on the upper portion of the main body of the patella after the adjustment component 4 is stabilized, the positioning components 3 are different in number as required when being installed on one traction steel wire 2, at least two sets of positioning components 3 are installed when being installed according to actual conditions, and the positioning components 3 are arranged on the large fracture main body when the positioning components 3 are arranged.

Preferably, as shown in fig. 3 and 6, the adjusting member 4 comprises a self-tapping screw in the middle of which a threaded cavity is formed, in which a tap 41 is screwed, and the traction wire 2 is fixed to the self-tapping screw through the tap 41; the cock 41 comprises a body formed with an external thread, a through hole 42 is formed at a top end portion of the body in a diameter direction thereof, the through hole 42 allows the traction wire 2 to pass therethrough, and symmetrical smooth notches 43 are formed at both end edges of the through hole 42, respectively; in the above-mentioned embodiment of the adjusting component 4, the whole of the tapping screw is screwed into the upper part of the patella body to provide sufficient tension and stability for the steel claw, and the structure of the cock 41 is arranged therein to ensure that one end of the traction steel wire 2 passes through the through hole 42 and then is connected through the traction steel wire 2 at the other end to form a closed loop, after the whole loop is adjusted (so that the whole traction steel wire 2 is in a tightened state), the cock 41 is screwed into the tapping screw to further finely adjust the tightening, so as to improve the stability thereof, and after the cock 41 is screwed into the tapping screw, a part of the joint at the two ends of the traction steel wire 2 can be cut off, so that the joint is not excessively protruded.

Preferably, as shown in fig. 2 and 5, the positioning assembly 3 includes a self-tapping screw, in which a limit plug 31 is movably connected, and a "U" -shaped communication groove for allowing the traction wire 2 to pass through is reserved on the limit plug 31, wherein one example of the movable connection mode is; the shaft shoulder and the relative groove are matched to movably rotate, namely the limiting plug 31 can rotate at the self-tapping screw, so that when each positioning assembly 3 is fixed, the traction steel wire 2 cannot be wound, the positioning assemblies 3 are positioned, the strength of positioning points positioned by single points is enough, and the fixing stability of the positioning assemblies is improved.

Description of the operation: firstly, selecting a proper (with a proper number of positioning components 3) traction steel wire 2 according to the fracture condition of a patient, then arranging the positioning components 3 on a large-block fracture bone body, then installing a fixing steel claw 1 at the fracture position, enabling a limiting hole on the steel claw to be positioned at the upper part of a patella and fixed at a proper position (the position of the limiting hole on the fixing steel claw 1 is determined by an actual operation scheme), then gradually using a self-tapping screw for fixing, then connecting and tightening the traction steel wire 2, and finally adjusting a cock 41 for reinforcing and stabilizing, thereby completing the treatment of the fracture block.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (4)

1. The utility model provides a kneecap lower extreme fracture internal fixation device which characterized in that: comprises a fixed steel claw and a fixed part; the fixed steel claw near-end is connected with the block of an extension, and processing has a spacing hole on the block install an adjusting part in the spacing hole, and the distal end of fixed steel claw is for embracing claw column structure, the fixed part includes a plurality of locating component and traction wire, traction wire passes adjusting part and establishes ties with each locating component, the adjusting part pulling traction wire is tightened.

2. The internal fixation device for patellar mandibular fracture according to claim 1, wherein: the adjusting part comprises a self-tapping screw, a threaded cavity is machined in the middle of the self-tapping screw, a cock is connected in the threaded cavity in a threaded mode, and the traction steel wire penetrates through the cock and is fixed on the self-tapping screw.

3. The internal fixation device for patellar mandibular fracture according to claim 2, wherein: the cock comprises a body which is provided with external threads, a through hole is processed at the top end part of the body along the diameter direction of the body, the through hole allows a traction steel wire to pass through, and symmetrical smooth notches are respectively processed at the edges of two ends of the through hole.

4. The internal fixation device for patellar mandibular fracture according to claim 1, wherein: the positioning assembly comprises a self-tapping screw, a limiting plug is movably connected in the self-tapping screw, and a U-shaped communication groove allowing a traction steel wire to pass through is reserved on the limiting plug.

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