CN2493171Y - Solid automatic jag cross locking intramedullary nail - Google Patents

Abstract

The utility model belongs to a furcal and solid automatic interlocking intramedullary nail which is mainly used for internal fixations of the fractures of thighbone and shinbone. The utility model mainly solves the problem of the prior intramedullary nail that the intensities of anti-bending, anti-wresting and anti-compressing are not enough or the operation during the operation is complex and the technical difficulty is large. The intramedullary nail is mainly characterized by including a solid nail body, the upper section of which is an external screw thread rod and a copulate fixedly pressure-adding screw cap; the surface of the middle section is provided with a groove along the portrait and is provided with a connection hole of a handle; the lower section is furcal as the shape of a Chinese character Ren, and two elastic furcal sheets are provided with screw thread holes. The utility model has the characteristics that the utility model has good performances of anti-bending, anti-wresting and anti-compressing and an interlocking pressure-adding function of anti-rotating, simplifying the operation; the utility model does not assisted with any external fixation; the patient can take exercise of the joint function immediately after the operation; the fracture heals fast; the success rate of the operation is high; the complication is little; the utility model can be easily popularized and applied at the base hospitals. The utility model can widely used in various types of the fractures of the thighbone and the shinbone.

Description

The automatic jag interlocking intramedullary nail of solid

Technical field

This utility model relates to a kind of human body property implanted medical apparatus and instruments, particularly a kind of interlocking intramedullary nail that is used for femur, fracture of tibia internal fixation.

Background technology

Existing intramedullary pin can be divided into two classes.One class is the intramedullary pin that does not possess the interlocking function, as quincunx, circle " worker " font, " V " font and rectangle intramedullary pin, its weak point is that intramedullary pin has certain degree of excursion in pulp cavity, postoperative need be assisted in external fixation, intramedullary pin bending resistance, antitorque, incompressible insufficient strength, easily cause intramedullary pin bending, fracture, cause internal fixation to lose efficacy.Another kind of is the intramedullary pin with interlocking function, as external G-K nail, the Brroker-wills nail, domestic lymphogranuloma inguinale interlocking intramedullary nail, make up anti-rotation interlocking intramedullary nail, leaf shape interlocking intramedullary nail, semicircle interlocking intramedullary nail, automatic hollow bifurcated interlocking intramedullary nail etc., they belong to hollow thin-wall basically, during being to use, its weak point needs to enlarge pulp cavity, finish internal fixation at the horizontal mortise lock nail of the upper and lower side of intramedullary pin, and most extension table and charged looking under the X-ray machine perspective that need be expensive be finished operation, complicated operation in the art, technical difficulty is big, be difficult to apply at China's basic hospital, and the doctor to contact certain lonizing radiation with the patient.

Summary of the invention

The purpose of this utility model be exactly to provide at above-mentioned weak point a kind of bending resistance, antitorque, anti-compression properties good, has anti-rotation interlocking pressurization function, do not assist in any external fixation the automatic jag interlocking intramedullary nail of the simple solid of operation technique.

Technical solution of the present utility model is: the automatic jag interlocking intramedullary nail of a kind of solid, comprise solid nail body, its epimere is the fixedly pressurization nut of external thread rod and cooperation, it is characterized in that: section surface longitudinally is provided with groove in the nail body, and is provided with the handle connecting hole.Nail body hypomere is " people " font bifurcated, and two elasticity bifurcated sheets are provided with screw hole.

Nail body stage casing groove described in this utility model technical solution can be circular arc Siping City fluting, its four groove cambered surfaces to the transverse diameter of groove cambered surface less than the angle of chamfering circle to angular diameter.

Nail body hypomere bifurcated sheet described in this utility model technical solution is when closing up state can be cubic chamfering circle.

Handle connecting hole described in this utility model technical solution can be threaded connection hole.

This utility model is owing to adopt solid nail body, thereby has stronger bending resistance, antitorque, resistance to compression.Because nail body stage casing is circular arc Siping City fluting, its four groove cambered surfaces to the transverse diameter of groove cambered surface less than the angle of chamfering circle to angular diameter, thereby it is with a contact at the pulp cavity perisporium, contact surface is little and be different from circle or similar round hollow body intramedullary pin.Just because of contact surface is little, just can stop up pulp cavity and cause the intrinsic pressure rising of pulp cavity and influence the circulation of pulp cavity inner blood.Because nail body hypomere is " people " font jag, two jag sheets are provided with screw hole, joining small screw closes two bifurcated sheets and disturbs locking, thereby when fixing fracture, when the jag end of intramedullary pin enters the fracture far-end, the locking screw nail is withdrawed from, two bifurcated sheets can elasticity after heat treatment can automatically spring open with the size of key pulp cavity and be " people " font, closely be embedded in the pulp cavity cortical bone, rotate, increase stable internal fixation effect up to anti-going up.Owing to be provided with the handle connecting hole, thereby can wear handle and control direction, be convenient to operate in the art.Because there are 5～7 ° of arcs in nail body stage casing, adds physical form changes such as upper groove cambered surface, and powerful bending resistance, antitorque, compressive property can be provided, meet human femur under loading anatomical physiology radian, have kinetic stability, be provided with biology and block effect, help promoting union of fracture.Compared with prior art, the utlity model has bending resistance, antitorque, resistance to compression good, anti-rotation interlocking pressurization function, operation technique is simplified, and does not assist in any external fixation, and postoperative can carry out exercise of joint function immediately, union of fracture is fast, the success rate of operation height, complication is few, is easy to the characteristics of applying at basic hospital.

Description of drawings

Fig. 1 is this utility model structural representation; Fig. 2 is the A-A cutaway view of Fig. 1; Fig. 3 is the B-B cutaway view of Fig. 1; Fig. 4 is the partial left side view of bifurcated sheet among Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is described in further detail: as shown in Figures 1 to 4.Intramedullary pin nail body 4 is a solid.Nail body 4 epimeres are external thread rod 2, match with fixing pressurization nut 1.Nail body 4 stage casings are the solid fluting, and the four sides has arc groove 6, its four groove cambered surfaces to the transverse diameter of groove cambered surface less than the angle of chamfering circle to angular diameter, be the some contact at the pulp cavity inwall, wound is little, does not increase the pulp cavity internal pressure.Nail body 4 hypomeres are " people " font bifurcated, and two bifurcated sheets 5 have elasticity.Two bifurcated sheets, 5 lower ends are provided with screw hole 7, join screw and two bifurcated sheets 5 can be closed up and lock together.When two bifurcated sheets 5 closed up locking, its outside was cubic chamfering circle.When fixing fracture, bifurcated sheet 5 enters the fracture far-end, and the locking screw nail withdraws from, two bifurcated sheets 5 can open effectively along with the size of key far-end pulp cavity, are stuck in the pulp cavity, play the anti-anti-increase stability action of turning round that revolves, cooperate pressurization nut 1 in addition, reach anti-3 internal fixation that revolve.Nail body 4 is provided with handle connecting hole 3, and this hole is a threaded connection hole, and the handle that also is provided with threaded rod matches.During operation, handle is connected on the nail body 4, can be used for controlling direction.5～7 ° of arcs in nail body 4 stage casings, consistent with the physiologic radian of femur, and physical form such as groove cambered surface changes, make it not only have bigger incompressible, bending resistance, torsional strength, and meet human femur under loading anatomical physiology radian, have kinetic stability, do not have biology to block effect, help promoting union of fracture.Operation technique is simple, does not assist in any external fixation, and postoperative can carry out exercise of joint function immediately, and union of fracture is fast, the success rate of operation height, and complication is few, and is economical and practical, is easy to promote at basic hospital.This utility model also can be widely used in femur, all types of stable and unstable fractures of tibia.

Claims (4)

1, the automatic jag interlocking intramedullary nail of a kind of solid, comprise solid nail body (4), its epimere is the fixedly pressurization nut (1) of external thread rod (2) and cooperation, it is characterized in that: section surface longitudinally is provided with groove (6) in the nail body (4), and is provided with handle connecting hole (3); Nail body (4) hypomere is " people " font bifurcated, and two elasticity bifurcated sheets (5) are provided with screw hole (7).

2, the automatic jag interlocking intramedullary nail of solid according to claim 1 is characterized in that: described nail body (4) stage casing groove (6) is circular arc Siping City fluting, its four groove cambered surfaces to the transverse diameter of groove cambered surface less than the angle of chamfering circle to angular diameter.

3, the automatic jag interlocking intramedullary nail of solid according to claim 1 is characterized in that: it is cubic chamfering circle that nail body (4) hypomere bifurcated sheet (5) is when closing up state.

4, according to claim 1 or the automatic jag interlocking intramedullary nail of 2 or 3 described solids, it is characterized in that: described handle connecting hole (3) is a threaded connection hole.

Images