CN205126387U

CN205126387U - Kneecap internal fixation device

Info

Publication number: CN205126387U
Application number: CN201520870230.3U
Authority: CN
Inventors: 陈志力
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2016-04-06
Anticipated expiration: 2025-10-29

Abstract

The utility model provides a kneecap internal fixation device, this kneecap internal fixation device of its characterized in that includes the staple, no. 1 runs from opposite directions gasket (2) of centre bore, and nut (7), wherein: the staple divide into nail handle section (8), boss section (10), canned paragraph (3), screw thread section (12), nail anterior (11) and nail point (6) in proper order, nut (7) cooperate in screw thread section (12), gasket (2) are overlapped and are located in canned paragraph (3), fixed kneecap (5) back, boss section (10) are hugged closely in one gasket (2), and nut (7) are hugged closely in another gasket (2). The shape of gasket (2) is crescent, and the crescent moon of two gasket (2) sets up relatively. It has preceding rupture groove (13) to open between screw thread section (12) and nail anterior (11). It has backfolding fault trough (9) to open between nail handle section (8) and boss section (10). It is fixed that the device can make the fracture reach the pressurization, can not influence the preceding aponeurosis (aponeuroses) restoration of kneecap again, simple structure, and easy to operate connects reliably.

Description

Patella inner fixing device

Technical field

This utility model belongs to medical instruments field, relate in orthopaedics Patella fracture internal fixation operation of cutting and resetting, when before not blocking kneecap when aponeurosis (aponeuroses), the Internal fixation Pressure of fracture can be reached, be conducive to again the reparation of aponeurosis (aponeuroses) before kneecap, the final internal fixation apparatus promoting union of fracture.

Background technology

In Patella fracture internal fixation operation of cutting and resetting, there is the method for a variety of fixing fracture, but alternative internal fixation apparatus is but very limited, and there is a lot of defect in these internal fixation apparatus, usually cause Unstable internal fixation or internal fixation apparatus fracture, bring misery to patient and too increase medical tangle risk.Now internal fixation method common at present and internal fixation apparatus pluses and minuses are summarized as follows:

1, needles combined with tension band is the classical way having applied a lot of year, and cardinal principle is draw point doing the fracture longitudinal axis para-position while, utilizes steel wire (tension side) before kneecap to walk around draw point annular and bands together, and realizes the object that longitudinal pressing is fixing.But at least there are 3 aspect problems in the method: (1) draw point needs of exposing according to longitudinal diameter of patella cut off be embedded in subcutaneous, because stayed length is bad control, when often occurring that patient goes down on one's knees because backshank is long, pain is produced to the stimulation of skin, easily cause steel wire from backshank slippage time too short, cause and fix unsuccessfully; (2) under steel wire causes patella when patella surface firmly pressurizes, burst apart in pole, the patella transverse fracture that particularly fracture line is on the lower side more easily occurs, not only cause fixing failure but also increased the weight of damage, steel wire often has fatigability phenomenon of rupture in knotting place simultaneously; (3) patella surface is because of annular or the blocking of 8-shaped steel wire, and is unfavorable for the stitching reparation of aponeurosis (aponeuroses) before kneecap, to a certain degree has influence on the shortcomings such as kneecap symphysis.

2, Chinese patent publication discloses a kind of patella fixing device on February 18th, 2015, publication number CN104352271A, it is characterized in that: (1) this patella fixing device is provided with the female component and male component that can snap together, fixing by plugging together of female component and male component, distance between convenient adjustment female component and male component, the demand of multiple different patient can be met, add the fixed effect of patella fixing device to patella to the full extent; (2) be designed with screw hole and screw in the portion of plugging together, after the reduction of the fracture is satisfied, tighten the screws nail plays anti-tensile fixation.But because whole holder combiner is all at patella dead ahead, not only large area has blocked the reparation of aponeurosis (aponeuroses) before kneecap, and it is uncomfortable at heart because easily seeing when going down on one's knees after the blocked up operation in patients of equipment that inside-fixture profile causes, subcutaneous before blocked up excessive inner fixer is placed in kneecap in addition, add infection chance and easily cause wound healing bad.

3, Chinese patent publication discloses a kind of Patella fracture internal fixation hollow pin on March 13rd, 2015, publication number CN104644256A, comprise the hollow rivet nut that the head of a nail is established in one end, thread segment is established in one end, described rivet nut two ends tube wall is equipped with a groove vertically, it is characterized in that, described hollow rivet nut is made up of the split rivet nut that some sections are interconnected with one another cooperation; Described some sections of split rivet nuts adopt the composition that is threaded, and are specially: these some sections of splits nails for be every one section of both sides female threaded joint, every one section of both sides be can and female threaded joint form the male threaded joint formation being threaded and coordinating.This invention takes several hollow rivet nuts to adopt the mode be threaded, and achieves hollow nail and can regulate different length along with the size of the patella of different patient.But its structure is too complicated, be difficult to operation, connect and may lose efficacy between some sections of split nails.

Summary of the invention

The purpose of this utility model overcomes the deficiencies in the prior art, provides one that fracture can be made to reach pressurization fixing, and can not affect again aponeurosis (aponeuroses) reparation before kneecap, structure is simple, easily operates, connects reliable patella inner fixing device.

The technical scheme that this utility model adopts is:

A kind of patella inner fixing device, is characterized in that this patella inner fixing device comprises staple, has the pad of centre bore for a pair, nut, wherein:

Staple is divided into nail handle section, boss section, canned paragraph, thread segment, nail front portion and nail tip successively;

Nut screw connection is in thread segment;

Pad is placed on canned paragraph place;

After fixing patella, boss section is close to by a pad, and nut is close to by another pad.

In this utility model: nail handle section is also electric drill gripping section or manually-operated hammering section, boss section is equivalent to the bolt head playing position-limiting action, pad plays and disperses stressed and uniform force effect, and nail design that is anterior and nail tip can be same as the Front-end Design of osseous pin or Kirschner wire.

Further scheme is: the shape of pad is crescent, and the crescent moon of two pads is oppositely arranged, and is more conducive to thus fixing and protecting patella.

Further scheme is: have front snap slot between thread segment and nail front portion, so that the nail that more easily fractures is anterior.

Further scheme is: have rear snap slot between nail handle section and boss section, more easily to fracture nail handle section.

This utility model adopts staple through patella, realizes upper and lower two fracture ends of patella fix as axle center by fastening nut; Fracture after fixing and follow closely handle section, nail is anterior and cut off unnecessary thread segment, make the patella after fixing not have too much internal fixation material to expose, avoid the postoperative pessimal stimulation to skin; After fixing, patella dead ahead does not have shelter, for before good kneecap, aponeurosis (aponeuroses) reparation provides essential condition; Two pad crescent moons are filled the span of a man's arms relatively, overcome the tensile stress fracture face of causing produced because going down on one's knees and to be separated and inside-fixture fractures, and finally realize realizing subtracting of tension force face while the pressurization of fracture face is fixed and open one's eyes wide.Staple of the present utility model also can be described as broken patella Internal fixation Pressure nail.

Advantage of the present utility model and beneficial effect are: this patella inner fixing device alleviates the tension force because motion produces the pressurization of solution Patella fracture is fixing while; The protection of skin and soft tissue is taken into account while aponeurosis (aponeuroses) reparation before solving kneecap; This patella inner fixing device structure of You Yin is simply small and exquisite, slight to tissue injury after fixing, finally benefits from patient.Structure is simple, easily operates, and connects reliable.Staple is applicable to electric drill and manual operation two kinds of modes insert patella.Can indwelling is different with the size of the patella of different patient length staple (canned paragraph).In fact, fixation principle of the present utility model is exactly bolt catenation principle.

Accompanying drawing explanation

Fig. 1 is the structural representation of staple of the present utility model;

Fig. 2 is the enlarged drawing of the sectional view of crescent pad;

Fig. 3 is the enlarged drawing of the left view of crescent pad;

Fig. 4 is one of this patella inner fixing device operation chart;

Fig. 5 is this patella inner fixing device operation chart two;

Fig. 6 is this patella inner fixing device operation chart three;

Fig. 7 is the schematic diagram adopting this patella inner fixing device to fix patella.

In figure: 1. knee joint, 2. pad (crescent), 3. canned paragraph, 4. fracture line, 5. patella, 6. nail tip, 7. nut, 8. follow closely handle section, 9. snap slot (annular), 10. boss section (annular) after, 11. nails are anterior, 12. thread segments, snap slot (annular) before 13..

Detailed description of the invention

Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining this utility model, is not intended to limit the scope of application of the present utility model.

As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a kind of patella inner fixing device, it is characterized in that this patella inner fixing device comprises staple, have the pad 2 of centre bore for a pair, nut 7, wherein: staple is divided into nail handle section 8, annular boss section 10, canned paragraph 3, thread segment 12, nail anterior 11 and nail tip 6 successively; Nut 7 is matched with thread segment 12; Pad 2 is placed on canned paragraph 3 place; After fixing patella 5, boss section 10 is close to by a pad 2, and nut 7 is close to by another pad 2.

The shape of pad 2 is crescent, and the crescent moon of two pads 2 is oppositely arranged.

The front snap slot 13 of annular is had between thread segment 12 and nail anterior 11.

The rear snap slot 9 of annular is had between nail handle section 8 and boss section 10.

Concrete operations can be as follows:

(1) skin is cut, temporary fixed with large towel forceps after patella 5 being reset to fracture line 4 para-position, the patella 5 entry point ligament place of depending on is made minimal incision * along machine direction, generally all need to cut in patella 5 left and right sides, because generally all need to insert two cover patella inner fixing devices simultaneously.Get staple and be inserted in a pad 2 (crescent moon opening to the right) from nail tip 6, nail handle section 8 is fixed on electric drill, nail tip 6 is aimed at ligament cutting section and is drilled patella 5, canned paragraph 3 is fixed as axle center by upper and lower two fracture ends of patella 5, tractive nail anterior 11, make pad 2 be close to patella 5 sclerotin, see Fig. 4.

(2) after confirming fracture line 4 good apposition with C arm X-ray, before annular, snap slot 13 fractures and follows closely anterior 11, another pad 2 (crescent moon opening left) is inserted in from thread segment 12, form the gesture of 2-in-1 armful of two pads, fastening nut, impels two pads 2 to carry out pressurization to fracture face and produces certain effect power, after nut screwing clamping pressurization is fixing, pad 2 has tension stress effect, sees Fig. 5.

(3), after observation confirms that fracture face is closely fitted together to further, fracture nail handle section 8, cuts unnecessary thread segment 12 and appear, prevent unnecessary inside-fixture chafe, see Fig. 6.

(4), after inserting two cover patella inner fixing devices as stated above, the quadriceps femoris enlarged portion of aponeurosis (aponeuroses) and patellar ligament both sides before the kneecap of reparation fracture, after disinfection and stitching skin, internal fixation operation terminates, and sees Fig. 7.

Below be only an embodiment of the present utility model, every any equivalent replacement done this utility model, all should be included within protection domain of the present utility model.

Claims

1. a patella inner fixing device, is characterized in that this patella inner fixing device comprises staple, has the pad (2) of centre bore for a pair, nut (7), wherein:

Staple is divided into nail handle section (8), boss section (10), canned paragraph (3), thread segment (12), nail anterior (11) and nail tip (6) successively;

Nut (7) is matched with thread segment (12);

Pad (2) is placed on canned paragraph (3) place;

After fixing patella (5), a pad (2) is close to boss section (10), and nut (7) is close to by another pad (2).

2. patella inner fixing device according to claim 1, is characterized in that: the shape of pad (2) is crescent, and the crescent moon of two pads (2) is oppositely arranged.

3. patella inner fixing device according to claim 1, is characterized in that: have front snap slot (13) between thread segment (12) and nail anterior (11).

4. patella inner fixing device according to claim 1, is characterized in that: have rear snap slot (9) between nail handle section (8) and boss section (10).