CN106725817A - Arcuate arm screw press formula reduction forceps - Google Patents

Abstract

The invention discloses a bow-shaped arm screw pressurized resetting forceps, which includes a curved part and a straight arm part. One end of the curved part is a fixed end fixed on the handle of the straight arm part, and the other end is a free end. The end is far away from the upper end of the straight arm part, and the free end of the curved part is used to realize contact with the part to be fixed. The straight arm part includes a rotating device, and the outer part of the rotating arm of the rotating device is covered with a handle , the straight arm part realizes fixing the position to be fixed through the guide device under the action of the rotation and pressure of the rotation device. The invention can not only overcome the problems of insufficient pressure and difficulty in fixing, but also increase the guide device, avoid the problem that the direction cannot be fixed when inserting the steel nail, and reduce the pain of the patient.

Description

Bow Arm Spiral Compression Reset Forceps

technical field

The invention relates to the technical field of medical instruments, in particular to a bow-shaped arm screw pressure reset forceps.

Background technique

At present, trochanter fracture is a common fracture in the elderly. Reduction forceps are mostly used for fixation of fractures in fracture surgery, which is conducive to the healing of fractures. However, the reduction forceps currently used in the market are bilateral entry, and the anatomy of the trochanter is uneven. During the operation, the skin incision is on the outside of the thigh, and there is a rich muscle wrap around the femoral tuberosity. When the reduction forceps are fixed, one side of the fixed end needs to pass through the thigh. The limited space in the outer skin incision makes it difficult to go directly around the small trochanteric fracture site on the inner thigh to fix the fracture fragment. At the same time, the reduction forceps are not strong enough to maintain a stable state.

Therefore, there is a need for a reduction forceps that can easily slide to the small tuberosity of the inner thigh through the skin incision and then press and fix it.

Contents of the invention

In order to solve the deficiencies in the prior art, the present invention discloses a bow-shaped arm screw pressurized resetting forceps. The purpose of the present invention is to overcome the problems of insufficient pressing force and difficult fixation of the existing resetting forceps.

To achieve the above object, the specific scheme of the present invention is as follows:

Bow-shaped arm spiral pressure reset pliers, including a curved part and a straight arm part, one end of the curved part is a fixed end, fixed on the handle of the straight arm part, and the other end is a free end, the free end and the straight arm The upper end of the part is far away from each other, and the free end of the curved part is used to realize the contact with the part to be fixed. The straight arm part includes a rotating device, and a part of the rotating arm of the rotating device is covered with a handle outside. Under the action of the rotation and pressure of the rotation device, the arm can fix the position to be fixed through the guide device.

Further, an inward surface near the free end of the curved portion is provided with a sawtooth structure.

Further, the curved portion is an arcuate arm, and the arcuate arm is bent from a long semi-cylinder.

Further, the distance between the free end and the fixed end of the arcuate arm is 132 mm, the radius of the semi-cylindrical section (thickness of the arcuate arm) is 6 mm, and the diameter (width of the arcuate arm) is 1.2 mm.

Further, the straight arm part also includes an arc structure, and the arc structure is fixed on the rotating device through a bearing.

Further, the rotating device includes a screw, one end of the screw is connected to the rotor for twisting, and the other end is connected to the arc structure through a bearing.

Further, the surface of the handle is provided with a concave-convex structure that increases friction.

Further, the guide device includes a small hole set on the arc structure of the straight arm part and a small hole set on the section of the curved part close to the free end. direction.

Further, the length of the arc structure of the straight arm is 45 mm, and the length of the fixing device connecting the arc structure and the screw is 12 mm.

Further, the radius of the screw is R6, and the length is 167mm.

Further, the handle has a radius of R8 and a length of 108 mm.

The straight arm of the reduction forceps of the present invention is twisted forward to fit the femur, and together with the free end of the arcuate arm, the fracture is reset. The reset pliers can not only overcome the problems of insufficient pressure and difficulty in fixing, but also the scale is marked on the screw rod, which can accurately measure the length of the steel nail required, and the guide device is added to avoid the problem that the direction cannot be fixed when inserting the steel nail, reducing patient suffering.

Beneficial effects of the present invention:

(1) The contact area between the free end of the bow-shaped arm and the bone is small, which increases firmness while reducing damage to blood vessels and nerves.

(2) There is a small hole with a diameter of 6mm in the arc at the top of the straight arm, which echoes the small hole on the upper bow arm, and can determine the direction of driving the steel nail.

(3) Reduce the difficulty of open reduction and internal fixation for intertrochanteric fractures, and reduce the pain of patients.

(4) The traditional scissors pressurization method is replaced by the axial spiral pressurization method, which can be fixed to prevent slipping while increasing the force.

Description of drawings

Fig. 1 Front view of reset clamp;

Fig. 2 cutaway view of reset forceps;

Figure 3 is a schematic diagram of the dimensions of the various components of the reset clamp;

Among the figure, 1, arc structure, 2, screw rod, 3, handle, 4, straight arm tail end, 5, bearing, 6, small hole, 7, sawtooth, 8, the free end of arcuate arm.

detailed description:

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in Figure 1, the bow-arm spiral pressure reset forceps is divided into two parts, an upper part and a lower part.

The upper part of the arcuate arm spiral pressure reset forceps is an arcuate arm. The bow-shaped arm is first attached between the femur and the muscle, from the outer incision to the inner side of the femur, and the angle between the reduction forceps and the bone is adjusted so that the head of the bow-shaped arm faces the part to be fixed and is far away from the straight arm end of the reduction forceps. relatively. The inner side of the head of the bow arm is serrated, which can increase friction and prevent falling off. After the angle adjustment is completed, the straight arm is pushed forward in a spiral manner to fix the fracture site.

The lower part of the bow-arm spiral compression forceps is divided into straight arms. There is a screw in the straight arm, which moves upward in a spiral. The top of the straight arm is an arc-shaped structure, which can increase the contact area and prevent slipping. There is a fixed bearing at the junction of the arc and the straight arm to avoid arbitrary rotation and scratch the tissue, and at the same time ensure the precise connection between the arc-shaped structure and the bone; the end of the straight arm has a rotation The handle can be rotated on the plane perpendicular to the straight arm, which is not only convenient for the hand to apply tangential force, but also can effectively save labor due to the longer arm.

The cross-section of the bow arm is designed as a semicircle, with the arc facing outward to reduce tissue scratches, and the rectangle facing inward to increase the contact area with the bone. Since the bow arm is designed as a semi-cylindrical structure, the mass can be reduced by half, reducing The extra load generated during use is convenient to use.

The straight arm is twisted forward until it fits the femur, and together with the free end of the arched arm, the fracture is reset. The spiral twisting design can ensure greater strength.

The free end 8 of bow-shaped arm has saw-toothed projection inboard, can increase friction. Arc-shaped structure 1, arc-shaped rather than continuous straight arms can increase the contact area and prevent slipping. The screw rod 2 can be screwed and twisted to advance forward. Handle 3, the design of the concave-convex surface can increase the friction and prevent sliding during the operation. The tail end 4 of the straight arm has a rotating handle that is convenient for twisting. The rotating handle is a rotor, and the lever principle is adopted to achieve labor-saving purpose. The bearing 5 connects the screw rod 2 and the arc-shaped structure 1 to prevent the arc-shaped end from moving and damaging the tissue when it is pushed forward. The small holes 6 with a diameter of 6mm, the arc-shaped structure 1 and the bow-shaped arm part are opposite to each other up and down, and steel nails can be placed. The sawtooth 7 of the free end 8 of bow-shaped arm increases friction and prevents slipping.

As shown in Figure 2-3, the distance between the free end and the fixed end of the bow-shaped arm is 132mm, the radius of the semi-cylindrical section (thickness of the bow-shaped arm) is 6mm; the length of the arc-shaped structure 1 is 45mm, and the fixing device connecting the arc-shaped structure and the screw 12mm long; straight arm internal screw radius R6, length 167mm, external handle radius R8, length 108mm.

The bow-shaped arm is first attached between the femur and the muscle, and is wound around the inside of the femur from the outside. The angle is adjusted so that the head of the bow-shaped arm faces the part to be fixed, and is far away from the arc-shaped structure 1 of the straight arm of the reset forceps. After the angle adjustment is completed, the straight arm is pushed forward to fix the fracture site.

If steel nails are required, there is a small hole with a diameter of 6mm in the arc at the top of the straight arm, which echoes the small hole on the upper bow arm, and can determine the direction of the steel nail. A steel nail is inserted through the hole to fix the fracture.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (10)

1. arcuate arm screw press formula reduction forceps, it is characterized in that, including bending section and straight-arm portion, one end of the bending section is solid Fixed end, is fixed on the handle in straight-arm portion, and the other end is free end, and the free end is stood far apart facing each other with the upper end in straight-arm portion, The free end of the bending section is used to realize to include whirligig, the rotation with the location contacts that need to be fixed, the straight-arm portion The outside of the part turning arm of device is cased with handle, and the straight-arm portion is in the presence of the rotary presser of whirligig by being oriented to Device is realized being fixed the position that need to be fixed.

2. arcuate arm screw press formula reduction forceps as claimed in claim 1, it is characterized in that, the close free end of the bending section Inside one side be provided with laciniation.

3. arcuate arm screw press formula reduction forceps as claimed in claim 1 or 2, it is characterized in that, the bending section is bow-shaped arm, The bow-shaped arm is that the bending of strip semicolumn is formed.

4. arcuate arm screw press formula reduction forceps as claimed in claim 3, it is characterized in that, the free end of the bow-shaped arm with it is solid The distance between fixed end is 132mm, and semicolumn section radius are 6mm, a diameter of 1.2mm.

5. arcuate arm screw press formula reduction forceps as claimed in claim 1, it is characterized in that, the straight-arm portion also includes arc knot Structure, the arcuate structure is fixed on the spinning device by bearing.

6. arcuate arm screw press formula reduction forceps as described in claim 1 or 5, it is characterized in that, the whirligig includes spiral shell Bar, one end of the screw rod is connected with the rotor of twisting is easy to, and the other end is connected by bearing with arcuate structure.

7. arcuate arm screw press formula reduction forceps as claimed in claim 1, it is characterized in that, the surface of the handle is provided with increasing The concaveconvex structure of big friction.

8. arcuate arm screw press formula reduction forceps as claimed in claim 1, it is characterized in that, the guider includes being arranged on Aperture on the arcuate structure in straight-arm portion and aperture of the bending section on the section of free end is arranged on, two apertures are mutually exhaled Should, the direction of steel nail is squeezed into for determination.

9. arcuate arm screw press formula reduction forceps as claimed in claim 5, it is characterized in that, the arcuate structure in the straight-arm portion is long It is 45mm, the fixing device 12mm long of connection arcuate structure and screw rod.

10. arcuate arm screw press formula reduction forceps as claimed in claim 6, it is characterized in that, the screw rod radius is R6, length It is 167mm；The handle radius is R8, and length is 108mm.