CN105919631B - A kind of medical instrument rebuild for plantar ligaments and application method - Google Patents

Abstract

The invention relates to the technical field of medical devices, and provides a medical device for plantar ligament reconstruction, including a guide needle, including a cylindrical round guide needle with a needle point, a guide probe with a needle point at the front end and a connecting part at the rear end, The front end is a blunt guide pin with a spherical structure, and there are connecting guide pins at the front and rear; a cylindrical hollow saw, a guide for guiding the guide pin, including a vertical catheter, and one side of the catheter is provided with a connected curved Tube; dilator sleeve and dilator head, including external threads that match with the dilator sleeve, the tail end is a cross-shaped structure, and a through hole for matching the guide needle is provided inside; the middle part is for the guide needle to pass through Hollow wrench for soft hollow tubes. The present invention has a simple structure and is easy to operate, can use each guide needle to operate, avoids the problem that it is difficult to take out during use, overcomes the defect of relying on self-healing in the prior art, avoids the trouble of relying on large-scale equipment for operation, and is low in cost. The effect is remarkable.

Description

A medical device for plantar ligament reconstruction and its application method

technical field

The invention relates to the technical field of medical devices, in particular to a medical device for plantar ligament reconstruction and a use method thereof.

Background technique

Foot pain is an important reason that affects foot function. There are many reasons for foot pain, and plantar ligament disease is the main reason. Acute plantar ligament injury or chronic strain is more common in clinical practice, such as tarsal toe joint fracture and dislocation, calcaneal comminuted fracture, heel pain, etc., often accompanied by injury and rupture of plantar long and short ligaments or plantar fascia. Complications such as arch collapse can result. Due to the complex anatomical structure and tough tissue of the plantar ligament, the injury is serious when the plantar ligament is exposed in an open manner, and it is difficult to suture the broken ligament directly; the current clinical repair method is mostly to restore the anatomical reduction of the joint or fracture, and the ligament will heal itself with scar, but the scar The elastic modulus and toughness are lower than those of ligaments, and the maintenance force on the arch of the foot is reduced, which can easily cause plantar pain and affect the patient's walking, weight bearing and working ability. If scar contracture is caused, it can lead to high arched foot and affect the life of the patient.

Contents of the invention

In order to solve the problem of plantar ligament repair, the present invention provides a medical device for plantar ligament reconstruction and a method of use, using minimally invasive operation to perform autologous tendon or allogeneic tendon transplantation to repair broken or damaged ligaments, and the operating range is located on the bottom surface of the tarsal bone And plantar blood vessels, nerves, and the back of tendons, avoiding damage to plantar ligaments, nerves, and blood vessels caused by open repair.

The present invention adopts following technical scheme to realize

A medical device for plantar ligament reconstruction, comprising: a guide needle, including a cylindrical round guide needle with a needle point, a guide probe with a needle point at the front end and a connecting part at the rear end, and a blunt guide needle with a spherical structure at the front end , there are connecting guide pins at the front and back;

Cylindrical hollow saw, the front end of the hollow saw is equipped with a sawtooth structure that is convenient for drilling through bone, a cavity is provided behind the serration, the side of the cavity is provided with a chute for easy removal of the bone column in the cavity, and a hollow is provided at the rear of the cavity. Saw, including the serrated structure at the front end to facilitate drilling through the bone, the rectangular chute on the side is convenient to take out the inner bone column of the hollow saw, and the handle with a through hole is set at the rear, and the guide pin can move in the through hole;

A guide for guide needle guidance, including a vertical conduit, one side of which is provided with a connected elbow;

The dilator sleeve includes a hard hollow tube with internal thread in the front, a soft hollow tube in the middle, and a hard hollow tube in the rear; the dilator head includes an external thread that matches the dilator sleeve, and the tail end is cross-shaped The structure has a through hole for matching the guide pin inside.

Further, it also includes a hollow wrench for fixing the dilator head and the dilator sleeve. The two ends of the hollow wrench are hard hollow tubes, and the middle part is a soft hollow tube through which the guide needle can pass. One end of the fixed wrench is provided with a There is a drill turning handle, and the other end is provided with a cross structure matching with the dilator head and a cylindrical part matching with the guide pin.

Further, the guide pins are connected by claws or screwed.

A method for using a medical device for plantar ligament reconstruction, comprising the following steps:

1) After determining the position, insert the circular guide pin, drill through the bone with a hollow saw, and use the chute to take out the bone column in the cavity;

2) Implant the guide and keep the required direction;

3) Implant the guide probe, keep the direction of the guide probe, and connect the guide pin to lead out;

4) The hollow wrench combines the dilator sleeve and the dilator head into a dilator, which is combined with the guide;

5) Put the blunt guide needle into the dilator, and the blunt guide needle pulls out the blunt dilation channel;

6) Remove the dilator head with a hollow wrench, connect the guide pin and take out the dilator head;

7) Use the connecting guide pin to operate and repair;

8) Replant the removed bone column with a hollow saw.

The advantage of the present invention is that the device has a simple structure and is easy to operate, can use each guide pin for operation, the combination and separation of the dilator sleeve and the dilator head are reliable, and the problem of being difficult to take out is avoided during use, which solves the problem of The defect of relying on self-healing in the prior art avoids the trouble of relying on large-scale equipment operation, and the cost is low and the effect is remarkable.

Description of drawings

Fig. 1 is the structural representation of hollow saw of the present invention;

Fig. 2 is a structural schematic diagram of the guide needle assembly of the present invention;

Fig. 3 is a schematic diagram of the connection of the guide needle of the present invention;

Fig. 4 is a structural schematic diagram of the guide device of the present invention;

Fig. 5 is a structural schematic diagram of the dilator of the present invention;

Fig. 6 is a structural schematic diagram of the hollow wrench of the present invention;

In the figure 1. Hollow saw, 2. Round guide pin, 3. Guide probe, 4. Blunt guide pin, 5. Connecting guide pin, 6. Hook connection, 7. Thread connection, 8. Guide, 9. Dilator Sleeve, 10. Dilator head, 11. Hollow wrench.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Fig. 1 and Fig. 2, the present invention provides a kind of medical apparatus for plantar ligament reconstruction, comprises following parts: guide needle, comprises the circular guide needle 2 that cylindrical shape has needle point, and the front end is the needle point, and the rear end is The guiding probe 3 of the connection part has a blunt guide pin 4 with a spherical structure at the front end, and there are connecting guide pins 5 of the connection part at the front and back.

Cylindrical hollow saw 1, the front end of the hollow saw 1 is provided with a sawtooth structure that is convenient for drilling through the bone, a cavity is provided behind the serration, the side of the cavity is provided with a chute for easy removal of the bone column in the cavity, and a chute is provided at the rear of the cavity. There is a hollow saw, including the serrated structure at the front end, which is convenient for drilling through the bone, and the rectangular chute on the side is convenient for taking out the inner bone column of the hollow saw.

As shown in FIG. 4 , the guide 8 used for guiding the guide needle includes a vertical conduit, and a connected elbow is provided on one side of the conduit, and the guide implements the guiding function according to the required direction.

As shown in Figure 5, the dilator sleeve 9 includes a hard hollow tube with an internal thread in the front, a soft hollow tube in the middle, and a hard hollow tube at the rear; the dilator head 10 includes a External thread, the end is a cross-shaped structure, and there is a through hole for the guide pin inside.

As shown in Figure 6, in order to realize the fixation of the dilator head and the dilator sleeve, a hollow wrench 11 is also provided. The two ends of the hollow wrench 11 are hard hollow tubes, and the middle part is a soft hollow tube. Empty and hollow tubes move back and forth. One end of the hollow wrench is provided with a drill handle, and the other end is provided with a cross structure matched with the dilator head. The guide needle is operatively connected along the inside, and when in use, the dilator head is implanted along the dilator sleeve, and the thread is rotated with a hollow wrench to form the dilator.

As shown in FIG. 3 , the guide pins are connected by hooks or threads.

Utilize the operation method of the medical equipment for plantar ligament reconstruction provided by the present invention, comprise the following steps:

1) After determining the position, insert the circular guide pin, drill through the bone with a hollow saw 1, and use the chute to take out the bone column in the cavity;

2) Implant the guide 8 and keep the required direction;

3) Implant the guide probe 3, keep the direction of the guide probe, and connect the guide pin 5 to lead out;

4) The hollow wrench combines the dilator sleeve and the dilator head into a dilator, which is combined with the guide;

5) Put the blunt guide pin into the dilator, and the blunt guide pin 4 pulls out the blunt dilation channel;

6) Remove the dilator head with a hollow wrench, connect the guide pin 5 and take out the dilator head;

7) Use the connecting guide pin 5 to operate and repair;

8) Replant the removed bone column with a hollow saw.

In the medical device used for plantar ligament reconstruction provided by the present invention, the base of the metatarsal bone is exposed through an incision on the dorsum of the foot, and the circular guide pin 2 is drilled obliquely from the base of the metatarsal bone. Bone, take out the drilled bone column, implant the guide 8 into the bone tunnel, keep the required direction, implant the guide probe 3, keep the probe close to the bottom layer of the tarsus, and pass through the tibia or fibula side of the foot, The connecting guide pin 5 is exported to the outside of the skin. Use a hollow wrench to combine the dilator sleeve and the dilator head to form a dilator and assemble the dilator, put the blunt guide pin 4 into the dilator, guide the blunt guide pin to the base of the metatarsal, and pull the blunt expansion channel to the base of the metatarsal, The connecting guide pin 5 is exported to the tibia side or the fibula side. Use a hollow wrench to rotate and remove the screw of the dilator head, take out the dilator head, use the connecting guide pin 5 to lead the autologous or allogeneic tendon to the metatarsal base bone tunnel, reconstruct the insertion point of the tendon, replant the removed bone column, and fix it with absorbable thread. The proximal tendon is reconstructed at the insertion point of the tendon or sutured with the ligament and tendon to complete the reconstruction of the plantar ligament.

Claims (2)

1. A medical device for plantar ligament reconstruction, characterized in that it includes: a guide needle, including a cylindrical circular guide needle (2) with a needle point, a guide probe with a needle point at the front end and a connecting part at the rear end (3), a blunt guide pin (4) with a spherical structure at the front end, and a connecting guide pin (5) with connecting parts at the front and back; Cylindrical hollow saw (1), the front end of the hollow saw is provided with a sawtooth structure for drilling through bone, a cavity is provided behind the serration, and a chute is provided on the side of the cavity for easy removal of the bone column in the cavity. It is equipped with a hollow saw, including a serrated structure at the front end to facilitate drilling through the bone, a rectangular chute on the side for easy removal of the inner bone column of the hollow saw, and a handle with a through hole at the rear, and the guide pin can move in the through hole; The guide (8) used for guiding the guide needle includes a vertical conduit, and one side of the conduit is provided with a connected elbow; The dilator sleeve (9) includes a hard hollow tube with internal threads in the front, a soft hollow tube in the middle, and a hard hollow tube at the rear; the dilator head (10) includes an external thread that matches the dilator sleeve , the tail end is a cross-shaped structure, and there is a through hole matching the guide pin inside; The guide pins are connected by claws or threaded. 2. The medical device for plantar ligament reconstruction according to claim 1, further comprising a hollow wrench (11) for fixing the dilator head and the dilator sleeve, the two ends of the hollow wrench are Hard hollow tube, the middle part is a soft hollow tube that allows the guide pin to pass through, one end of the fixed wrench is provided with a drill handle, the other end is provided with a cross structure that matches the dilator head, and a cylindrical part that matches the guide pin .