CN2424751Y - Frame-type internal fixator - Google Patents

Abstract

The utility model relates to a frame type internal fixture, which is suitable for treating the long bone fracture of the femur and the tibia. The utility model is composed of two connecting rods 1 with threads, more than two transverse rods 2, more than two square screws 3, a special screw cap 4, and an ordinary screw cap 5, wherein, the connecting rods 1 are provided with threads, one end of each transverse rod is provided with a square block 6 with a circular and square groove 14, and the other end is provided with a screw hole 7; one end of each square screw 3 is provided with a screw rod 8, and the other end is provided with a square block 9 with a circular and square groove 15; the screw rods 8 of the square screws 3 are screwed into the screw holes 7 of the transverse rods 2, the transverse rods 2 and the square screws 3 are connected into a whole, the circular grooves 14 and 15 of the square block 6 and the square block 9 of both ends are respectively sheathed on the two connecting rods 1, and the special screw cap 4 and the special screw cap 5 are used for fixing the circular grooves 14 and 15 and the two connecting rods together. The utility model has the advantages of simple structure and convenient operation.

Description

The frame-type inner fixer

This utility model belongs to the surgery medical apparatus and instruments, is applicable to treatment femur and tibia long bone fracture.

At present the treatment long bone fracture often uses the conventional pressurized steel plate, though use fixedly, allows the joint early ambulant, avoids the misery of joint stiffness and patient's long-term bed.But use this apparatus operation to need the more periosteum of peeling off often, damaged epiphysis blood fortune, the steel plate fixation side does not have growth of spur simultaneously, and postoperative produces stress-shielding effect.Use the fixing perimyelis that not only damaged of intramedullary needle, and fixing not firm, more need be aided with external fixation, be difficult for early exercise and cause joint stiffness.

The purpose of this utility model provides a kind of frame-type inner fixer that promotes union of fracture, and the periosteum of its fracture end that can adequately protect seldom destroys blood fortune, can reduce stress-shielding effect behind the steel plate internal fixation again.If the pressurization scalable is near the screw on the connecting rod of fracture end both sides.

The purpose of this utility model is achieved in that

Described frame-type inner fixer is made up of two threaded connecting rods, many cross bars and a plurality of square screw.Described cross bar is connected with the square screw and is positioned on two connecting rods, fixes with plain nut and special nut, is beneficial to pressurize and the moving of limiting rod, and makes internal fixation solid and reliable.

Below in conjunction with accompanying drawing this utility model is described in detail:

Fig. 1 is described frame-type inner fixer sketch map.

Fig. 2 is described threaded rod sketch map.

Fig. 3 is described cross bar sketch map.

Fig. 4 is described square screw sketch map.

Fig. 5 is described special nut sketch map.

Described frame-type inner fixer is made up of two threaded connecting rods 1, cross bar 2, plural square screw 3, special nut 4 and plain nut 5 more than two.Be threaded on the described connecting rod 1, described cross bar 2 one ends are the square 6 of band circle-square groove 14, and the channel opening place of this circle-square groove 14 and the major diameter of thread of connecting rod 1 are complementary, and described cross bar 2 other ends have screw 7.Described square screw 3 one ends are that lead screw 8, the other end are the square 9 of band circle-square groove 15, square 9 and described square 6 shapes, big or small identical, and the lead screw 8 on the internal diameter of described screw 7 and the square screw 3 is complementary.Described special nut 4 one ends are cylindrical 12, and the circular groove internal diameter of this cylindrical 12 external diameter and square 6 and square 9 is complementary.The lead screw 8 of described square screw 3 is screwed in the screw 7 of cross bar 2, cross bar 2 and square screw 3 are fused, be enclosed within respectively on two connecting rods 1 in the square 6 at its two ends and the circular groove 14 and 15 of square 9, the upper and lower side of described square 6 and square 9 is fixed together connecting rod 1, cross bar 2 and square screw 3 with special nut 4 and plain nut 5 respectively.Can use many cross bars 2 and a plurality of square screw 3 as required.General four cross bars 2 and four square screws 3 of using.

Described frame-type inner fixer can be made with the chromium nickel-titanium alloy material.

Described connecting rod diameter can be 3.5～4.5nm, circle-square groove bore can be 3.5～4.5mm, during operation, hole on the backbone with drill bit earlier, insert cross bar 2, one ends and be screwed into square screw 3, then connecting rod 1 is inserted in the groove of square 6 and square 9, the upper and lower side of square 6 and square 9 is fixed together connecting rod 1, cross bar 2 and square screw 3 with special nut 45 and plain nut 5 respectively, and suitably pressurizes according to classification of fracture.

The medical curative effect of this utility model: carry out zoopery, internal fixation number of times three examples on the bulls bone, fracture The average healing 50 days, and the tension side callus is many, and healing is firmly.

This utility model is simple in structure, and is easy to use.

Claims (4)

1, a kind of frame-type inner fixer that is used for the treatment of femur and tibia long bone fracture, it is characterized in that described frame-type inner fixer is by two threaded connecting rods (1), cross bar more than two (2), plural square screw (3), special nut (4) and plain nut (5) are formed; Described connecting rod is threaded on (1), and described cross bar (2) one ends are the square (6) of band circle-square groove (14), and the major diameter of thread of the channel opening place of described circle-square groove (14) and connecting rod (1) is complementary, and described cross bar (2) other end has screw (7); Described square screw (3) one ends are lead screw (8), and the other end is the square (9) of band circle-square groove (15), and the lead screw (8) on the internal diameter of described screw (7) and the square screw (3) is complementary; Described special nut (4) one ends are cylindrical (12), and the circular groove internal diameter of the external diameter of these cylindrical (12) and square (6) and square (9) is complementary; The lead screw (8) of described square screw (3) is screwed in the screw (7) of cross bar (2), and cross bar (2) and square screw (3) are fused, and is enclosed within respectively on two connecting rods (1) in the circular groove (14) of square at its two ends (6) and square (9) and (15); The upper and lower side of described square (6) and square (9) uses special nut (4) and plain nut (5) that connecting rod (1), cross bar (2) and square screw (3) are fixed together respectively.

2, holder as claimed in claim 1 is characterized in that described cross bar (2) is four, and described square screw (3) is four.

3, holder as claimed in claim 1 is characterized in that described square (9) and square (6) shape, big or small identical.

4,, it is characterized in that the chromium nickel-titanium alloy material manufacturing of described frame-type inner fixer as claim 1 or 2 or 3 described holders.

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