CN203303058U - Full-tunnel analog measuring scale for cruciate ligament reconstruction - Google Patents

Abstract

The utility model discloses a dark analog ruler of sounding in full tunnel that cruciate ligament rebuilds, memory alloy wire's one end and miniature steel sheet swing joint, its other end and pulling force shadoof fixed connection, memory steel wire are provided with the scale, and the both ends of miniature steel sheet all are provided with the pull wire. The utility model discloses can carry out accurate measurement under the full tunnel tension that carries out bone tunnel under the tensile condition of maintenance, can also measure the length of thighbone, shin bone tunnel and knee joint intracavity ligament simultaneously for the operation can be more accurate, shortens the operation time, can also reach the purpose of the clothing of tailorring of measuring the body simultaneously, practices thrift raw and other materials.

Description

Full Tunnel Analog Scale for Cruciate Ligament Reconstruction

technical field

The utility model relates to the field of medical instruments, in particular to a full-tunnel measuring instrument for cruciate ligament reconstruction.

Background technique

The cruciate ligament is an important structure to maintain the stability of the knee joint. After the injury, the knee joint becomes unstable, which accelerates the degeneration of the articular cartilage and meniscus, and increases the probability of damage to other structures of the joint. With the development of arthroscopic technology, arthroscopic reconstruction of cruciate ligament with transplanted tendon has become the main method for the treatment of cruciate ligament injury. However, with the continuous increase of patients, the cases of postoperative failure of reconstructed ligaments are also gradually increasing. The literature reports that the failure rate of ACL reconstruction is between 3.6% and 15%. There are many factors that lead to the failure of ACL reconstruction, among which the healing of the graft in the bone tunnel is one of the key factors for success. Current research shows that the mobility of the graft in the bone tunnel (wiper effect and bungee effect), the length of the graft in the tunnel, the size of the bone tunnel, and the degree of matching with the tendon are one of the important factors affecting tendon-bone healing . Scholars have found that when the graft is suspended and fixed with a button plate, the longer the wire used for suspension in the bone tunnel and the shorter the grafted tendon, the higher the tension on the grafted tendon and the greater the "bungee effect" , so it is recommended to reduce the length of the bone tunnel suspension wire to reduce the "bungee effect".

At present, the size, especially the length, of the bone tunnel of the anterior cruciate ligament under arthroscopy is established segmentally through a hard ruler (femoral and tibial tunnels), and the length required for the intra-articular ligament can only be obtained through the flexion of the femur and the tibial tunnel. Arthroscopic measurements were made at the tibial footprint. Although segmental femoral to tibial tunnel measurements may be relatively accurate, intra-articular tendon lengths in the knee joint can only be measured arthroscopically at the femoral and tibial footprints in flexion plus the fork ligament. The mismatch of joint alignment after injury may affect the accuracy of measurement, which in turn affects the mismatch of graft and tunnel length. On the one hand, the tendon-bone healing may be affected due to the "bungee effect", and on the other hand, the tendon graft is wasted.

Utility model content

The utility model aims to provide a full-tunnel depth-measuring analog ruler for cruciate ligament reconstruction, which can accurately measure the full-tunnel tension of the bone tunnel under the condition of maintaining tension, and can also measure femur, tibial tunnel and knee The length of the ligament in the joint cavity can be tailored to suit the individual, which is beneficial to reduce the impact of the "bungee effect" on tendon-bone healing, promote tendon-bone healing, and improve the utilization rate of tendon grafts.

In order to achieve the above object, the utility model is realized by adopting the following technical solutions:

The full-tunnel depth-measuring analog ruler for cruciate ligament reconstruction disclosed by the utility model is characterized in that one end of the memory alloy wire is movably connected with the miniature steel plate, and the other end is fixedly connected with the tension lifting rod, and the memory alloy wire is provided with a scale , both ends of the micro-steel plate are provided with traction wires, which are convenient to lead out from the bone tunnel during measurement.

Preferably, the memory alloy wire is a memory steel wire.

Preferably, the micro steel plate is an endbutton steel plate.

Preferably, the flexible connection between the memory alloy wire and the micro-steel plate is a hinge connection.

Preferably, the accuracy of the scale is 1 mm.

Preferably, the memory alloy wire has a diameter of 3mm.

The depth-measuring analog ruler in the full tunnel for cruciate ligament reconstruction disclosed by the utility model can accurately measure the full tunnel tension of the bone tunnel under the condition of maintaining the tension, and can also measure the femoral, tibial tunnel and knee joint cavity at the same time. The length of the ligament can be tailored to suit the individual’s needs, minimize the “bungee effect”, facilitate tendon-bone healing, and increase the utilization of tendon grafts; reduce the pain of patients, save raw materials, and have good social and economic benefits.

Description of drawings

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

In the figure: 1-miniature steel plate, 2-memory alloy wire, 3-scale, 4-pull lifting rod, 5-drawing wire.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, in the full-tunnel sounding analog scale for anterior cruciate ligament reconstruction disclosed by the utility model, one end of the memory alloy wire 2 is movably connected with the micro-steel plate 1, and the other end is fixedly connected with the tension lifting rod 4, and the memory alloy wire 2 The wire 2 is provided with a scale 3, and both ends of the micro-steel plate 1 are provided with a pulling wire 5.

Preferably, the memory alloy wire 2 is a memory steel wire.

Preferably, the miniature steel plate is an endbutton steel plate.

Preferably, the flexible connection between the memory alloy wire 2 and the micro-steel plate 1 is a hinge connection.

Preferably, the accuracy of the scale 3 is 1 mm.

Preferably, the memory alloy wire 2 has a diameter of 3 mm.

The operation of the utility model is as follows: under the pulling of the traction wire 5, the micro-steel plate 1 automatically tilts parallel to the memory alloy wire 2, and the traction wire 5 pulls the micro-steel plate 1 and the memory alloy wire 2 from the lower side of the tibial tunnel to the outside of the femoral tunnel. Lead out from the tibial tunnel to the outer opening of the femoral tunnel, then reset the micro-plate 1 to a position perpendicular to the memory alloy wire 2 and fix it, then reset the knee joint, and pull the tension lifting rod 4 located outside the tibial end. Under normal circumstances, read out the exact lengths of the femoral tunnel, tibial tunnel, and ligaments in the joint cavity sequentially on the memory alloy wire 2 with scale 3. After the length measurement is completed, gently pull one end of the microplate 1 to make the microplate 1 become in line with the bone. In the direction parallel to the tunnel, the memory alloy wire 2 and the micro-steel plate 1 are withdrawn from the outer opening of the tibial tunnel along the bone tunnel.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (6)

1. A full-tunnel sounding analog ruler for cruciate ligament reconstruction, characterized in that: one end of the memory alloy wire (2) is flexibly connected to the miniature steel plate (1), and the other end is fixedly connected to the tension lifting rod (4), The memory alloy wire (2) is provided with scales (3), and both ends of the miniature steel plate (1) are provided with traction wires (5). 2. The full-tunnel sounding analog ruler for cruciate ligament reconstruction according to claim 1, characterized in that: the memory alloy wire (2) is a memory steel wire. 3. The full-tunnel sounding analog ruler for cruciate ligament reconstruction according to claim 1, characterized in that: the miniature steel plate (1) is an endbutton steel plate. 4. The full-tunnel sounding analog ruler for cruciate ligament reconstruction according to claim 1, characterized in that: the movable connection between the memory alloy wire (2) and the micro-steel plate (1) is a hinge connection. 5. The full-tunnel sounding analog ruler for cruciate ligament reconstruction according to claim 1, characterized in that: the accuracy of the scale (3) is 1mm. 6. The full-tunnel sounding analog ruler for cruciate ligament reconstruction according to claim 1, characterized in that: the memory alloy wire (2) has a diameter of 3mm.

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