CN211087703U - A meniscus model for suture practice - Google Patents

Abstract

A meniscus model for suture practice, which includes a bottom frame made of elastic metal wire, two positioning sleeves made of flexible metal wire sleeved on the bottom frame, a simulation made of silicone For the silica gel body used for sutured meniscus tissue, both ends of the bottom frame are provided with positioning and installation holes, and the silica gel body is fixedly connected to the bottom frame through the positioning sleeves at both ends. The meniscus model for suture practice provided by the utility model greatly improves the effective utilization rate of the silica gel model, and reduces the silica gel material and preparation cost during the practice process.

Description

A meniscus model for suture practice

technical field

The utility model relates to the technical field of teaching and training, in particular to a meniscus model used for suturing practice.

Background technique

Fig. 1 is a schematic diagram of the structure principle of the position of the meniscus in the knee joint; Fig. 2 is a schematic diagram of the top-view structure principle of the meniscus in Fig. 1; Fig. 3 is a schematic diagram of the cross-sectional structure of the meniscus; It is a meniscus cartilage between the femoral condyle and the tibial plateau. Its lateral edge is thicker and is closely connected with the joint capsule. The medial edge is thinner and is in a free state. The medial meniscus 101 is "C" shaped, and the lateral meniscus 102 Approximately in the shape of an "O", the anterior and posterior ends of the meniscus are attached to the non-articular parts of the middle of the tibial plateau, anterior and posterior to the intercondylar spine. This part is also known as the anterior and posterior horns of the meniscus.

The parameniscal capillary network originates from the medial-inferior and lateral-inferior branches of the geniculate artery, forming peripheral vessels and radially penetrating vessels beside the meniscus. Therefore, referring to FIG. 3 , the meniscus is divided into a “red-red” area, a “red-white” area and a “white-white” area according to the position of the blood vessel area. Because the meniscus itself has poor blood supply and weak repair power, it is difficult to repair itself once it is damaged. If it is not treated in time, it is easy to cause damaging arthritis in the late stage.

Most scholars tend to agree that for qualified cases, no resection should be performed for those that can be sutured, and subtotal or total resection should not be performed for those that can be partially resected. physiological function. If the patient's meniscus injury is relatively fresh, the blood supply of the tear opening is rich, and the patient is young and middle-aged, the first choice is of course meniscal suture.

Figure 4 is a schematic diagram of the structure and principle of the meniscus peripheral tear; Figure 5 is a schematic diagram of the structure principle of the meniscus barrel handle tear; Referring to Figures 4 and 5, in medical practice, the peripheral tear of the meniscus is also That is, the injury of the "red-red" area of the meniscus near the junction of the joint capsule has the best effect after suture, and the barrel-handle tear, that is, the internal fragments of the "red-white" area of the meniscus are displaced after suture. more likely to succeed.

Arthroscopic suturing of meniscus injury is a relatively mature surgical method at present. It injects flowing sterile saline into the joint cavity, enters the joint cavity through the working channel with a lens and operating instruments, and directly displays the lens through the monitor. Under the vision, the location and extent of the meniscus injury can be observed, which can be sutured by one of three methods: outside-in suturing, inside-out suturing, or total internal suturing.

Meniscus suture is a delicate operation, which requires high technical requirements for doctors, and skilled suture techniques require doctors to practice for a long time.

The team of the inventor of the present application (that is, the medical and nursing team of the applicant's "Guizhou Provincial People's Hospital" Department of Orthopedics), based on practical experience, combined with existing technologies, for example, a knee arthroscopy exercise model provided by Chinese patent CN202363002U, The knee joint model provided by Chinese patent CN201498135U, or the technologies mentioned in the literature such as the detachable knee joint teaching model provided by CN206601879U, a training device for simulating meniscus surgery in an arthroscopic environment is designed. On the same day, an application for a utility model titled "a training device for simulating meniscus surgery in an arthroscopic environment" was submitted, and Figure 6 is a schematic diagram of a partial three-dimensional exploded structure principle of the training device for simulating meniscus surgery in an arthroscopic environment; FIG. 7 is a schematic diagram of the structural principle of the top surface of the tibia model in FIG. 6 . Referring to FIG. 6 and FIG. 7 , a training device for simulating meniscus surgery in an arthroscopic environment designed by the inventor’s team includes a base plate 1 , a tibia model 2 and a femur model 3 respectively connected to the base plate 1 . , the top of the tibia model 2 is detachably provided with a meniscus model 4, the bottom plate 1 is detachably provided with an isolation cylinder 5 for blocking the field of view of the tibia model 2, and the meniscus model 4 can be made of silica gel through injection molding The two ends of the meniscus model 4 can be provided with mounting holes 41, and the top of the tibia model 2 can be provided with mounting holes corresponding to the mounting holes 41, so that the rubber nails or rubber Plugs (not shown in the figure) fixedly connect the two sides of the meniscus model 4 with the top of the tibia model 2, and the femur model 3 can be rotated with the bottom plate 1 through a link system 31. Connection, the base plate 1 can be provided with an installation slot 11 around the tibia model 2, the isolation cylinder 5 can be inserted on the slot 11, and the isolation cylinder 5 corresponds to the femur model 3 One side is provided with an assembly opening 51, which can provide an assembly space for the connecting rod system 31, so as to ensure that when the femur model 3 is assembled in any position, the connecting rod system 31 will not affect the isolation cylinder 5 assembly. Several (two are shown in the figure) are provided on the side wall of the isolation cylinder 5 relative to the tibial model 2 for insertion holes 52 for arthroscopic and surgical instruments during the arthroscopic suturing operation. The use process of the training device for simulating meniscus surgery in an arthroscopic environment is as follows: when medical staff need to practice meniscus suture operation, they must first select the meniscus suture site for practice, and assemble the corresponding meniscus model 4 On the top surface of the tibial model 2, then adjust and fix the position of the femoral model 3, so that the femoral model 3 and the tibial model 2 simulate the space position of the knee joint cavity, and then cover the isolation cylinder 5 On the tibia model 2 and fixed with the base plate 1, the medical staff can insert the arthroscope into the isolation cylinder 5 through the insertion hole 52 in front of the isolation cylinder 5 and place it on the meniscus The model 4 is then inserted into the insertion hole 52 to insert a surgical instrument, and the suturing operation is practiced according to the image obtained by the arthroscope and displayed on the display. After the suturing practice is over and the surgical instruments and arthroscope are stored, the isolation cylinder 5 can be removed to directly observe the effect of suturing, thereby facilitating the evaluation of the operation action, adjustment and development of skilled suturing operation feel and skills.

The above-mentioned training device for simulating a meniscus surgical operation in an arthroscopic environment designed by the inventor's team can better simulate a meniscus suture operation environment, and the cost is low.

In the above technical solution, the meniscus model 4 may be pre-installed in the mold with reference to FIG. 4 and/or FIG. 5 during the injection molding process to simulate peripheral tearing and/or barrel-shaped tearing. The position can also be injection-molded as a whole according to the outer contour of the meniscus, and then use a cutter to cut and shape the position of the peripheral tear and/or the barrel-shaped tear according to the needs of practice. However, it is necessary to prepare multiple complete models according to the overall outline of the meniscus, and each simulation exercise is only performed on a part of the model. Therefore, the effective utilization rate of the silicone model is low. When used for a long time, it is used to prepare the meniscus. The silicone material cost of the Model 4 is also higher.

Utility model content

The technical problem to be solved by the present invention is to provide a meniscus model for suture practice, so as to reduce or avoid the aforementioned problems.

In order to solve the above-mentioned technical problems, the utility model proposes a meniscus model for suture practice, which includes a bottom frame made of elastic metal wires, and two pieces of flexible metal wires sleeved on the bottom frame are made of flexible metal wires. A positioning sleeve is formed, a silicone body made of silicone to simulate the meniscus tissue used for suture, positioning and installation holes are provided at both ends of the bottom frame, and the silicone body is connected to the bottom frame through the positioning sleeves at both ends. Fixed connection.

Preferably, the bottom frame is made of steel wire with a diameter of 3-5mm.

Preferably, the positioning sleeve is made of copper wire with a diameter of 2-3mm.

Preferably, the bottom frame is detachably connected to the top of the tibia model, a positioning pin is inserted into the assembly hole at the top of the tibia model, and the positioning and mounting holes at both ends of the bottom frame are sleeved on the positioning pin .

Preferably, the height of the positioning pin exposed to the top of the tibial model is 3-6 mm.

The meniscus model provided by the present utility model for suture practice is compared with the technical solution of the utility model application titled "A training device for simulating meniscus surgical operation in an arthroscopic environment", which was submitted on the same day of the present application. , every time you practice suturing, you only need to use the silicone body that contains the shorter part of the structure used for suturing practice. After the practice, the silicone body that has completed the suturing operation can be easily removed and kept. , and intuitively compare the suture lines, which greatly improves the effective utilization of the silicone model, and reduces the silicone material and preparation cost during the practice process.

Description of drawings

The following drawings are only intended to illustrate and explain the present invention schematically, and do not limit the scope of the present invention. in,

Figure 1 is a schematic diagram of the structural principle of the position of the meniscus in the knee joint;

FIG. 2 is a schematic top-view structural principle diagram of the meniscus of FIG. 1;

Figure 3 is a schematic diagram of the structural principle of the meniscus peripheral tear;

Figure 4 is a schematic diagram of the structural principle of the meniscus barrel handle tear;

5 is a schematic diagram of the structural principle of the meniscus barrel handle tear;

6 is a schematic diagram showing the principle of a partial three-dimensional exploded structure of an exercise device for simulating meniscus surgery in an arthroscopic environment applied on the same day;

FIG. 7 is a schematic diagram of the structural principle of the top surface of the tibia model of FIG. 6 .

8 is a schematic diagram of a three-dimensional exploded structure principle of a meniscus model for suture practice according to a specific embodiment of the present invention;

FIG. 9 is a schematic diagram of the cross-sectional structure principle of the silica gel body of FIG. 8;

FIG. 10 is a schematic diagram of the structure principle of the top surface of the tibia model for assembling the meniscus model for suture practice of FIG. 8 .

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts use the same reference numerals.

8 is a schematic diagram of a three-dimensional exploded structure of a meniscus model for suture practice according to a specific embodiment of the present invention; FIG. 9 is a schematic diagram of a cross-sectional structure of the silicone body of FIG. 8 ; FIG. 10 is a schematic diagram for assembling Figure 8 is a schematic diagram of the structural principle of the top surface of the tibia model of the meniscus model used for suture practice. Referring to FIGS. 8-10 , the present invention provides a meniscus model 6 for suture practice, which includes a bottom frame 61 made of elastic metal wires, and two A positioning sleeve 62 made of flexible metal wire, a silicone body 63 made of silicone to simulate the meniscus tissue used for suture, both ends of the bottom frame 61 are provided with positioning and installation holes 611, and the silicone body 63 passes through the two ends. The positioning sleeve 62 at the end is fixedly connected with the bottom frame 61 .

As described in the background art, the meniscus model 6 for suturing practice provided by the present invention is to solve the problem of “a kind of meniscus simulating arthroscopic environment” submitted by the team of the inventor of the present application on the same day of the present application. In the technical solution of the utility model application of the “practice device for surgical operation”, each time a suturing exercise is performed, regardless of the size of the suturing site, a meniscus model 4 with the same size as the real meniscus must be provided, so as to effectively utilize the silicone model. lower, and the material cost for preparing the meniscus model 4 is also higher.

In the technical solution of the present application, the silica gel body 63 may only include a part of the structure for suturing practice, that is, the silica gel body 63 may be prepared by injection molding only including the structure for suturing practice. The shorter part can also be used after the meniscus model 4 in the background art, cut the intact part that is not sutured, and then use a knife to cut the position of the peripheral tear and/or the barrel-shaped tear according to the needs of the exercise For example, when the meniscus model 4 in the background art is only used for the suture connection of the body, after the exercise, the body with the suture can be reserved for the subsequent suture effect comparison, and then the anterior corner and posterior Corner cutting and separation, when the front corner stitching practice needs to be performed, the cutting and forming of the peripheral tear and/or barrel-shaped tear position can be performed with a knife on the front corner obtained by cutting and separation according to the needs of the practice. The silica gel body 63 for suturing practice of the front corner can be obtained.

The bottom frame 61 can be made of steel wire with a diameter of 3-5mm, which can ensure a certain elasticity while ensuring the structural strength, and can facilitate the positioning and installation holes 611 at both ends of the molding process during the manufacturing process. The elasticity provided by the bottom frame 61 can simulate the elastic force of the whole meniscus structural tissue in the cross-sectional direction and the extension direction. The size of the bottom frame 61 is smaller than that of the bottom surface of the meniscus model 4 in the background art, so as to ensure that the silica gel body 63 obtained by cutting can rest on the bottom frame 61 .

See Figure 9; in the operation of suturing the meniscus, the commonly used instrument approaches can use the positions shown by the dotted lines 200 and 300 in the figure, and when suturing, the suture lines can only be used as shown by the dotted lines 200 and 300 in the figure The position of the dashed line 400 and the positions shown by the dashed lines 200 and/or 300 in the figure can also be used as the route of the line. This also means that the rigidity of the bottom frame 61 at the bottom does not interfere with the passage of the sutures during regular sewing practice.

Referring to FIG. 10 , when using the meniscus model 6 for suturing practice of the present application, a positioning pin 21 needs to be pre-inserted in the fitting hole at the top of the tibia model 2 in the background art. The positioning pin It is only necessary to expose the top of the tibia model 2 to a certain height, which can ensure that the positioning and installation holes 611 at both ends of the bottom frame 61 can be sleeved and positioned. The positioning nails 21 can be made of steel wires with a diameter of 5-8 mm. Since the positions of the positioning nails 21 will not be used for suturing exercises, the height of the tops of the positioning nails 21 exposing the tibial model 2 can be as high as possible. It is 3-6mm, which can ensure the connection stability of the socketed bottom frame 61, and basically will not affect the cooperation of the femur model 3 and the tibia model 2.

The positioning sleeve 62 can be made of copper wire with a diameter of 2-3 mm, so that the two ends of the positioning sleeve 62 can be wound on the bottom frame 61 to form a ring that can move along the bottom frame 61. structure, since the positioning sleeve 62 has good flexibility, when it is necessary to assemble and fix the silica gel body 63 obtained by the above-mentioned cutting, according to the assembly position of the silica gel body 63 on the bottom frame 61, two The positioning sleeves 62 are adjusted to two sides. After the silicone body 63 is placed on the bottom frame 61, the positions of the two positioning sleeves 62 are adjusted so that the two positioning sleeves 62 are respectively sleeved on the bottom frame 61. The two ends of the silicone body 63 are then twisted to deform the copper wires of the positioning sleeve, so that the silicone body 63 is firmly fixed on the bottom frame 61 .

It should be understood by those skilled in the art that although Figures 8 and 9 only show the meniscus model 6 provided by the present invention for suturing practice arranged according to the structure of the medial meniscus, for the lateral meniscus, the The technical solution provided by the new model can be set according to the shape and characteristics of the lateral meniscus. The meniscus model 6 for suturing practice provided by the present invention for the lateral meniscus will not be repeated in this application.

The meniscus model provided by the present utility model for suture practice is compared with the technical solution of the utility model application titled "A training device for simulating meniscus surgical operation in an arthroscopic environment", which was submitted on the same day of the present application. , every time you practice suturing, you only need to use the silicone body that contains the shorter part of the structure used for suturing practice. After the practice, the silicone body that has completed the suturing operation can be easily removed and kept. , and intuitively compare the suture lines, which greatly improves the effective utilization of the silicone model, and reduces the silicone material and preparation cost during the practice process.

Those skilled in the art should understand that although the present invention is described in terms of multiple embodiments, not every embodiment only includes an independent technical solution. This description in the description is only for the sake of clarity, and those skilled in the art should understand the description as a whole, and regard the technical solutions involved in each embodiment as being able to be combined into different embodiments to understand the present utility. A new range of protection.

The above descriptions are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the protection scope of the present invention.

Claims (5)

1. The utility model provides a meniscus model for sewing up exercise, its characterized in that, it includes the underframe of being made by the elastic metal silk, cup joints two position sleeves of being made by the flexible metal silk on the underframe, the simulation of being made by silica gel is used for the colloidal silica of sutural meniscus tissue, the underframe both ends are provided with the location mounting hole, the colloidal silica passes through both ends the position sleeve with underframe fixed connection.

2. The meniscus model for suturing exercise according to claim 1, characterized in that the bottom frame is made of steel wire with a diameter of 3-5 mm.

3. The meniscus model for suturing practice according to claim 1, characterized in that the locating sleeve is made of copper wire with a diameter of 2-3 mm.

4. The meniscus model for suturing exercise according to claim 1, wherein the bottom frame is detachably connected with the top end of the tibia model, positioning nails are inserted into the assembly holes at the top end of the tibia model, and the positioning mounting holes at the two ends of the bottom frame are sleeved on the positioning nails.

5. The meniscus model for suturing exercise according to claim 4, wherein the height of the positioning pin exposed from the top end of the tibia model is 3-6 mm.

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