CN108125715A - Posterior cruciate ligament tibial insertion tunnel guide - Google Patents

Abstract

The invention relates to the technical field of medical instruments, in particular to a post cruciate ligament tibial insertion tunnel guider which comprises a soft leather sheath, a deformable tooth-shaped rubber tube, an inner tube, an outer tube and a handle, wherein the upper end of the inner tube is inserted into the deformable tooth-shaped rubber tube, the lower end of the inner tube is inserted into the handle and is fixedly connected with the handle, the inner tube at the upper end of the handle is fixedly provided with an outer sleeve, the outer sleeve is provided with a sliding device, and the soft leather sheath is wrapped on the outer sides of the outer tube and the deformable tooth-shaped rubber tube. The flexible rubber tube pushing device is reasonable and compact in structure, the sliding device, the steel wire pull wire and the deformable toothed rubber tube are arranged, the steel wire pull wire is driven to contract the deformable toothed rubber tube to change into a hook shape by controlling the up-and-down movement of the sliding device, the flexible rubber tube is gradually pushed out of the flexible rubber tube pushing device, the whole process is time-saving and labor-saving, the efficiency is high, the flexible rubber sleeve is made of a flexible rubber material, the flexible rubber sleeve is protected, the popliteal artery can be prevented from being damaged when the flexible rubber tube penetrates through a tibial tunnel, and the life safety of a.

Description

Posterior cruciate ligament tibial insertion tunnel guide

technical field

The invention relates to the technical field of medical instruments, and relates to a tunnel guider for the tibial insertion point of the posterior cruciate ligament.

Background technique

The knee cruciate ligament is an important stable structure of the knee joint, which is hinged between the intercondylar fossa of the femur and the intercondylar eminence of the tibia, preventing the tibia from shifting forward and backward along the femur. The cruciate ligament of the knee can be divided into two front and rear parts. The anterior cruciate ligament starts from the medial surface of the lateral femoral condyle, obliquely forward and downward, and ends at the front of the intercondylar eminence of the tibia and the front corner of the medial and lateral meniscus; the posterior cruciate ligament It originates from the lateral surface of the medial femoral condyle, goes obliquely posteriorly and inferiorly, and inserts on the posterior part of the intercondylar eminence of the tibia and the posterior horn of the lateral meniscus. When the knee joint moves, some fibers of each of the two ligaments are in tension.

When people are exercising or suffering from accidents, the posterior cruciate ligament is prone to rupture. If it is not treated in time, it will cause knee joint instability and seriously affect the knee joint function. The common treatment method is to reconstruct the ruptured posterior cruciate ligament , to restore the proper function of the joint. In the reconstruction of the posterior cruciate ligament, it is necessary to open a tibial tunnel on the tibial insertion of the posterior cruciate ligament, and then use a 1.0mm steel wire to pass through the tibial tunnel. The traction wire is ligated on the posterior cruciate ligament, and then the reconstructed ligament is pulled out of the tibial tunnel, and finally the ligament is fixed on the tibia, and the next step is performed. Since there is a popliteal artery at the back of the knee, when wearing the steel wire Be very careful, it is very time-consuming, even so, it is easy to damage the popliteal artery when wearing the steel wire, and even puncture the popliteal artery, causing massive bleeding, which seriously threatens the life safety of the patient.

Contents of the invention

The present invention provides a posterior cruciate ligament tibial insertion tunnel guide, which overcomes the deficiencies of the prior art and can effectively solve the problems of time-consuming and labor-intensive threading of steel wires and easy damage to the popliteal artery in posterior cruciate ligament reconstruction surgery.

The technical solution of the present invention is achieved through the following measures: a posterior cruciate ligament tibial insertion tunnel guide includes a soft leather sheath, a deformable toothed rubber tube, an inner tube, an outer tube, and a handle, and the upper end of the inner tube is inserted into a In the deformed toothed rubber hose, the lower end of the inner tube is inserted into the handle and fixedly connected with the handle. An outer sleeve is fixedly installed on the inner tube at the upper end of the handle, and a sliding device that can move up and down along the outer sleeve is arranged on the outer sleeve. The outer sleeve above the sliding device is provided with a limit ring that restricts the upward movement of the sliding device. The outer tube is set on the outer side of the inner tube at the upper end of the limit ring. The upper side of the outer tube is fixedly connected with the deformable toothed rubber tube. The lower side is fixedly connected with the limit ring, there is a wire gap between the outer tube and the inner tube, there are wire holes on the limit ring and the outer sleeve, and a steel wire is set in the deformable toothed rubber tube. One end of the steel wire is fixedly connected to the upper gap side of the deformable toothed hose, the other end of the steel wire passes through the wire gap, the wire hole and is fixedly connected with the sliding device. outside of the hose.

Below is the further optimization or/and improvement to above-mentioned technical scheme of the invention:

The above-mentioned sliding device includes a sliding sleeve and a spring. The sliding sleeve is arranged on the outside of the outer sleeve. A spring which can be compressed by the sliding sleeve is arranged between the outer sleeve and the sliding sleeve. A pull-tab that is symmetrical about the axis.

The above-mentioned inner tube is fixedly connected with the handle through threads.

Hollow anti-skid lines are arranged on the handle.

The present invention has a reasonable and compact structure. By setting the sliding device, the steel wire and the deformable toothed rubber hose, by controlling the up and down movement of the sliding device, and then driving the steel wire to shrink the deformable toothed rubber hose into a hook shape, the soft rubber hose gradually moves from The invention introduces that after the soft rubber tube passes through the tibial tunnel, the soft rubber tube that passes through is ligated with the traction wire connected to the posterior cruciate ligament, and then the reconstructed posterior cruciate ligament is pulled out from the tibial tunnel, and finally the reconstructed The posterior cruciate ligament is fixed on the tibia for the next step of treatment. The whole process is time-saving, labor-saving, efficient and shortens the operation time. With the protection of the soft holster, it can prevent the soft rubber tube from damaging the popliteal artery when passing through the tibial tunnel. The life safety of patients is guaranteed.

Description of drawings

Accompanying drawing 1 is the schematic cross-sectional structure diagram of the front view when the deformable toothed rubber tube is stretched in the best embodiment of the present invention.

Accompanying drawing 2 is the front view sectional structural schematic diagram when the deformable toothed rubber hose shrinks in the best embodiment of the present invention.

Accompanying drawing 3 is the structure diagram of the best embodiment of the present invention during operation.

The codes in the attached drawings are: 1 is the soft leather case, 2 is the deformable toothed rubber hose, 3 is the inner tube, 4 is the outer tube, 5 is the handle, 6 is the outer sleeve, 7 is the limit ring, 8 is the Thread-passing gap, 9 is the thread-passing hole, 10 is the steel wire puller, 11 is the posterior cruciate ligament to be reconstructed, 12 is the tibia, 13 is the tibial tunnel, 14 is the popliteal artery, 15 is the sliding sleeve, 16 is the spring, 17 is the pull 18 is the anti-slip pattern, 19 is the soft rubber tube, and 20 is the pulling line of the posterior cruciate ligament.

Detailed ways

The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

In the present invention, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout of the accompanying drawing 1 of the specification. Figure 1 layout direction to determine.

Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

As shown in accompanying drawings 1, 2, and 3, the posterior cruciate ligament tibial insertion tunnel guide includes a soft leather sheath 1, a deformable toothed rubber tube 2, an inner tube 3, an outer tube 4, a handle 5, and the upper end of the inner tube 3 Inserted in the deformable toothed rubber tube 2, the lower end of the inner tube 3 is inserted into the handle 5 and fixedly connected with the handle 5, the inner tube 3 at the upper end of the handle 5 is fixedly installed with an outer sleeve 6, and the outer sleeve 6 is provided with A sliding device that can move up and down along the outer sleeve 6. The outer sleeve 6 above the sliding device is provided with a limit ring 7 that restricts the upward movement of the sliding device. The outer tube 4 is set on the outer side of the inner tube 3 at the upper end of the limit ring 7. The upper side of the outer tube 4 is fixedly connected with the deformable toothed rubber hose 2, the lower side of the outer tube 4 is fixedly connected with the limit ring 7, and a line passing gap 8 is provided between the outer tube 4 and the inner tube 3, and the limit ring 7 and the outer sleeve 6 are provided with wire holes 9, and a steel wire 10 is arranged in the deformable toothed rubber hose 2, and one end of the steel wire 10 is fixedly connected with the upper end of the deformable toothed rubber hose 2. The other end of 10 passes through the wire passing gap 8 and the wire passing hole 9 in sequence and is fixedly connected with the sliding device. The soft leather sheath 1 is wrapped on the outside of the outer tube 4 and the deformable toothed rubber hose 2 .

In carrying out posterior cruciate ligament reconstruction operation, need to offer tibial tunnel 13 on tibial 12 insertion points, and penetrate soft rubber tube 19 in inner tube 3 of the present invention, then wrap the thin tube of soft leather sheath 1 on the present invention The part extends into the tibial tunnel 13, and the sliding device is dragged downward by hand, and the sliding device will gradually tighten the steel wire stay wire 10 in the process of moving down, and the steel wire stay wire 10 is tightened. It is gradually tightened into a hook shape. When the steel wire 10 is stretched, the deformable toothed rubber hose 2 gradually recovers its deformation. Through the static friction between the deformable toothed rubber hose 2 and the soft rubber hose 19, the soft rubber hose 19 arranged in the present invention It will move relative to the deformable toothed rubber tube 2, and by controlling the up and down movement of the sliding device, the soft rubber tube 19 can be continuously pushed out from the present invention, and finally the soft rubber tube 19 passes through the tibial tunnel 13 into the joint cavity, Ligate and fix the reconstructed posterior cruciate ligament 11 with one end of the posterior cruciate ligament traction wire 20 in advance, and insert the other end of the posterior cruciate ligament traction wire 20 into the soft rubber tube 19 that passes through the tibial tunnel 13, and the posterior cruciate ligament traction wire 20 and The soft rubber tubes 19 are tightly fitted for ligation. By slowly pulling the soft rubber tubes 19, the reconstructed posterior cruciate ligament 11 is gradually pulled out from the tibial tunnel 13, and finally the reconstructed posterior cruciate ligament 11 is fixed on the tibia 12 for In the next step, the whole process is time-saving, labor-saving, efficient, and shortens the operation time. Originally, the 1.0mm steel wire was used to pull the posterior cruciate ligament 11 to be reconstructed, but the present invention uses a soft rubber tube 20 in the process of use. In addition, the soft holster 1 is made of soft rubber. With the protection of the soft holster 1, the deformable toothed rubber tube 2 becomes hook-shaped and will not touch the soft tissue around the popliteal artery 14, which can prevent the soft rubber tube 19 from passing through the tibial tunnel. At 13 o'clock, the popliteal artery 14 was injured, which guaranteed the patient's life safety.

According to actual needs, the above-mentioned posterior cruciate ligament tibial insertion tunnel guide can be further optimized or/and improved:

As shown in accompanying drawing 1,2,3, sliding device comprises sliding sleeve 15, spring 16, and sliding sleeve 15 is contained in the outside of outer sleeve 6, is provided with between outer sleeve 6 and sliding sleeve 15 and can be compressed by sliding sleeve 15. The spring 16 is fixed on the outer wall of the sliding sleeve 15 at least two pull-tabs 17 symmetrical about the axis of the sliding sleeve 15. The sliding device has a simple structure and stable performance. The steel wire 10 is fixedly connected to the sliding sleeve 15. The setting of the pull piece 17 can facilitate fingers to exert force on the sliding sleeve 15. When the sliding sleeve 15 moves downward along the outer sleeve 6, It will gradually tighten the steel wire stay wire 10 and compress the spring 16, so that the deformable toothed rubber hose 2 is gradually tightened and becomes a hook shape, so that the soft rubber hose 19 is gradually pushed out from the present invention. When the sliding sleeve 15 is released, the sliding Cover 15 can reset automatically under the effect of spring 16 elastic force, makes operation more convenient and labor-saving.

As shown in accompanying drawings 1, 2 and 3, the inner tube 3 and the handle 5 are fixedly connected by threads. This facilitates the process of disassembly and installation, as well as replacement and maintenance.

As shown in accompanying drawings 1, 2 and 3, the handle 5 is provided with hollow anti-skid lines 18 . The anti-slip lines 18 hollowed out on the handle 5 can not only enhance the friction between the palm and the handle 5, but also reduce the quality of the present invention, making it more flexible and convenient for doctors to use during surgery.

The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (5)

1. A posterior cruciate ligament tibial insertion tunnel guide is characterized in that it comprises a soft leather sheath, a deformable toothed rubber tube, an inner tube, an outer tube, a handle, and the upper end of the inner tube is inserted in the deformable toothed rubber tube, and the inner tube is inserted into the deformable toothed rubber tube. The lower end of the tube is inserted into the handle and fixedly connected with the handle. An outer sleeve is fixedly installed on the inner tube at the upper end of the handle. A sliding device that can move up and down along the outer sleeve is arranged on the outer sleeve. The outer sleeve above the sliding device There is a limit ring to limit the upward movement of the sliding device. The outer tube is set on the outer side of the inner tube at the upper end of the limit ring. The upper side of the outer tube is fixedly connected with the deformable toothed rubber hose, and the lower side of the outer tube is fixed with the limit ring. Connection, there is a wire gap between the outer tube and the inner tube, a wire hole is set on the limit ring and the outer sleeve, and a steel wire is set in the deformable toothed rubber hose, and one end of the steel wire is connected to the deformable The notch side of the upper end of the toothed rubber hose is fixedly connected, the other end of the steel wire stays through the wire gap and the wire hole in turn and is fixedly connected with the sliding device, and the soft leather sheath is wrapped on the outside of the outer tube and the deformable toothed rubber hose. 2. The posterior cruciate ligament tibial insertion tunnel guide according to claim 1 is characterized in that the sliding device comprises a sliding sleeve and a spring, the sliding sleeve is arranged on the outside of the outer sleeve, and there is a device that can be used between the outer sleeve and the sliding sleeve. The spring compressed by the sliding sleeve is fixedly connected to the outer wall of the sliding sleeve at least with two symmetrical pulling pieces about the axis of the sliding sleeve. 3. The posterior cruciate ligament tibial insertion tunnel guide according to claim 1 or 2, characterized in that the inner tube and the handle are fixedly connected by threads. 4. The posterior cruciate ligament tibial insertion tunnel guide according to claim 1 or 2, characterized in that the handle is provided with hollow anti-slip lines. 5. The posterior cruciate ligament tibial insertion tunnel guide according to claim 3, characterized in that the handle is provided with hollow anti-slip lines.