JP2532346B2 - Extracorporeal artificial joint - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reducing the load applied to joints for treating joint diseases in humans or animals.

[0002]

2. Description of the Related Art As a means for reducing the load applied to a joint, a means for deliberately limiting the load with a cane or a crutch, a means for externally fixing a support so that the joint does not move, and the like are used. . In the means using this support, the load applied to the joint is reduced, but since the movement of the joint is limited, it is inconvenient that daily movement cannot be performed. Also, a hinge joint is provided between the two supports,
For joints where each support is pinned to the patient's bone
Treatment device is also known (Japanese Patent Laid-Open No. 53-83382).
However, since the support is made of a rigid member, it moves the arms and legs.
At this time, the force directly acts on the bone or joint and causes the patient discomfort or
May cause distress.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to obtain a device for reducing the load applied to a joint without limiting the movement of the joint.

[0004]

[Means for Solving the Problems] A first means for solving the above problems is, as described in claim 1, to hold a pin connected to a skeleton at each end of a pair of hinged supports. you clamper order to continuously provided the body outside the prosthetic joint
There are, at least one of the previous SL support, characterized in that interposed a cushion with elastic.

The second means is, as described in claim 2, in claim 1, the intermediate portion of the support is locked.
Separated into two parts having a tube and a tubular part to which the rod fits,
Between the two parts, the buffer and the position supporting the buffer are adjusted.
It is characterized by interposing a seat that can be knotted .

[0006]

According to the means of claim 1, the device is mounted in a state where traction force is applied to the joint, prevents the joint from being loaded, and allows the joint to move by the hinge , and
The shock transmitted to the skeleton through the artificial joint is buffered. Then, according to the means of claim 2, the position of the seat is determined.
You can adjust the elasticity of the shock absorber to adjust the shock absorbing effect.
It

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, 1 is a human knee joint, 2 is a femur, 3 is a tibia, and 4 is a fibula. Reference numeral 5 is an artificial joint of the present invention, which is attached to both sides of penetrating pins 6 to 9 penetrating a leg portion outside the body. The penetrating pins 6 to 9 are the same as those used in the past for connecting an extracorporeal auxiliary tube subordinate to a fractured part.

The artificial joint 5 has a hinge 10 having an axis 10a.
Supports 11 and 12 rotatably connected to each other are provided. The support body 11 is composed of rods 13 and 14, and both rods 1
Angles 3 and 14 are connected by an angle adjuster 15 so as to be adjustable. The angle adjusting portion 15 is formed by stacking protruding portions 13a and 14a from the rods 13 and 14 and fastening them with screws 15a. Form and engage.

The end portion of the rod 14 is the clamper 1
6 is adjustable and fixed. Conventionally, the clamper 16 is of the same type as that for fixing an external fixation pipe subordinate to a fractured part to a penetrating pin that penetrates the skeleton, and includes a rod clamper 17, a rotating plate 18, and a pink ramper 19.

The rod clamper 17 has a hole to be fitted into the rod 14 and a slit 17a reaching the hole, and the slit 17a is contracted with a tightening screw 17b so that the rod 1
Fixed in place of 4. The rotary plate 18 has a circular arc surface 1 at the outer end.
8a, a slit (not shown), and a tightening screw 18b are rotatably fitted to a protrusion 17c extending from the rod clamper 17, and are adjusted and fixed in the direction of arrow 20. The pink ramper 19 is a clamp piece 1 that holds the pins 6 and 7.
9a, 19b and a tightening screw 19c, the clamp piece 1
9a is superposed on the circular arc surface 18a. Tightening screw 19
c is screwed into a female screw swingably held in the rotary plate 18, and when the pink ramper 19 is adjusted in the direction of the arrow 21 along the arc surface 18a and the tightening screw 19c is tightened, the pink ramper 19 is The penetrating pins 6 and 7 are fixed to the rotary plate 18 while being sandwiched therebetween.

The intermediate portion of the other support 12 is divided into a rod 23 and a cylindrical portion 24 into which the rod 23 is inserted.
The rod 23 is provided with a stepped portion 23a, and the cylindrical portion 2
The threaded portion 25a of the adjusting ring 25 is screwed into the shaft 4, and a buffer spring 26 is interposed between the step portion 23a and the adjusting ring 25. The adjustment ring 25, the scan-flops
It is a seat whose position can be adjusted with respect to the ring 26.

A clamper 27 is connected to the connecting portion 24a extending downward from the cylindrical portion 24, and both ends of the penetrating pins 8 and 9 are clamped by the clamper 27. The clamper 27 includes clamp pieces 27a and 27b and a tightening screw 27c.

With the above-described structure, the clamper 27 is fixed to the lower through pins 8 and 9, and the tightening screw 18b of the rotary plate 18 of the upper clamper 16 is loosened to remove the rod clamper 1.
7 and the pink ramper 19, the rod 14 and the penetrating pins 6 and 7 are temporarily fixed, the tightening screws 17b, 18b and 19c are tightened while adjusting the fixed position and the fixed angle, and the joint 10 is pulled. Fix joint 1 in a state where it does not hinder flexion and extension.

At this time, the rods 1 and 1 are moved by the angle adjusting unit 15.
The angle of 4 is adjusted to adjust the shape of the support 11, the adjustment ring 25 is rotated to adjust the resilience of the spring 26, and the vertical position of the hinge 10 is finely adjusted.

By mounting in this way, most of the body weight is absorbed from the femur 2 through the penetration pins 6, 7 and the artificial joint 5 .
The weight transmitted to the tibia 3 via the pulling 26 and the penetration pins 8 and 9 and acting on the joint 1 becomes small. When the knee is bent and stretched, the artificial joint 5 bends and extends around the hinge 10 together with the knee, so that walking and other daily activities can be performed without any hindrance.

In the above embodiment, the artificial joint 5
Although it is used on both sides of the leg, the penetrating pins 6 to 9 may be projected from only one side of the leg and one artificial joint 5 may be interposed to make the cantilever type. Also, in the embodiment, the lower clamper 2
7 and the cylindrical portion 24 are integrated at the connecting portion 24a, but an adjustable position adjusting mechanism can be provided in place of the connecting portion 24a, and the clamper 16 or 27 can be replaced vertically. The upper and lower parts can be the same type of clamper.

The structure of the hinge 10 is not limited to that shown in the figure, but a hole for receiving the shaft 10a can be provided with a margin, for example, a large-diameter hole, a horizontally long elliptical hole, or a substantially heart-shaped circle. It may be an arcuate hole or the like.

Although the case of using the knee joint has been described above, the invention can also be used for the elbow joint and also for pets and livestock.

[0019]

As described above, according to the first aspect of the present invention, the artificial joint that can be bent and extended by the hinge and that includes the support body with the buffer interposed can be externally fixed along the joint. Therefore, the load applied to the joint can be reduced, which is useful for treatment, and there is an effect that the joint can flex freely and the behavior is not inconvenient . Furthermore, the shock transmitted through the artificial joint is buffered. effect to reduce the discomfort is relieved there <br/> Ru. According to the invention of claim 2, the spring seat
By adjusting the position of the
It has an effect of adjusting the impact action and the load bearing force.

[Brief description of drawings]

FIG. 1 is a front view showing a mode of use of an embodiment of the present invention.

[Fig. 2] Similarly, a side view

[Explanation of symbols]

5 Artificial joint 6-9 Penetration pin
10 Hinge 11, 12 Support 13, 14, 23
Rod 15 Angle adjuster 16, 27 Clamper
17b, 18b, 19c, 27c Tightening screw 24 Cylindrical part 25 Adjustment ring 26 Spring

Claims (2)

(57) [Claims] At each end of the 1. A hinged pair of supports, the continuously arranged somatic outside prosthetic joints clamper for holding the pin which is attached to the backbone, at least one of the previous SL support, An extracorporeal artificial joint characterized in that an elastic cushioning body is provided. 2. The intermediate portion of the support according to claim 1.
To a two-part having a rod and a tubular part into which the rod fits
Separately, between the two parts, a buffer and a position for supporting the buffer.
It is characterized by interposing a receiving seat whose position can be adjusted,
Extracorporeal artificial joint.