CN215018176U - Intervertebral water sac spreader - Google Patents

Abstract

The utility model relates to an intervertebral water sac spreader, which comprises a water injection pipeline and a water sac body; the water injection pipeline is of a Y-shaped structure; the water bag body is arranged at two ends of the upper side of the water injection pipeline, and the bottom plane of the water bag body is in integral sealing connection with the water injection pipeline respectively; the water injection pipeline is made of hard materials; the water sac body is planar in a normal state and is cubic after being injected with water and expanded; the water sac body is of a double-layer structure or a lengthened structure and is made of medical thickened PVC materials. Its advantages are: simple structure and diversified, low price, small, especially be applicable to narrow and small space's intervertebral struts operation and use, and can guarantee with the area of contact of centrum end plate, avoid the end plate stress too big and lead to damaging the risk.

Description

Intervertebral water sac spreader

Technical Field

The utility model belongs to the technical field of medical appliances technique and specifically relates to an intervertebral water pocket struts ware.

Background

The lumbar vertebrae side anterior approach interbody fusion (OLIF) can be implanted into an interbody fusion cage with a larger volume, which is helpful for bone grafting and osseous fusion, can better recover the intervertebral space height and the balance of the lordosis and the coronal plane, and can indirectly reduce pressure, thereby reducing nerve injury and adhesion. The operation mode has small approach injury, is a newer spine surgery mode, and is widely popularized and applied.

In order to achieve the purposes of restoring the height of the intervertebral space and indirectly reducing the pressure, the most important step in the OLIF operation is to open the intervertebral space, and because the OLIF operation space is narrow, a metal sheet-shaped opener or a test membrane opener is usually adopted in the prior art, and even an operator directly abandons the opener and directly strikes a cage (an intervertebral fusion cage) into the intervertebral space. The above techniques have the disadvantages that: for the sheet-shaped distracter, when the intervertebral space is distracted, the edge of the supporting sheet is always abutted against the upper end plate and the lower end plate of the two centrums, and the supporting sheet is thinner, so that the contact area between the end plates and the supporting sheet is very small, and the local pressure of the end plates is too large, and the damage is very easy to cause; for the membrane test distractor, a test membrane needs to be gradually driven into the space between two vertebral bodies, and only a local area at the front end of the test membrane is contacted with an upper end plate and a lower end plate during initial driving, so that the distraction mode also has the risk of damage to the end plates due to overlarge local pressure of the end plates; the same problems exist with the direct approach of knocking the cage into the intervertebral space; in addition, slice struts ware and examination membrane struts ware all has multiple size specification, and is not only more expensive in the aspect of the price, and need according to patient's actual conditions at the in-process that struts the intervertebral space, according to try out the not unidimensional ware of strutting by big step by little, until confirming the suitable size's that can strut the intervertebral space struts ware, this makes the operation process comparatively loaded down with trivial details.

Chinese patent documents: CN201720162715.6, application date 20170222, patent names: an intervertebral space opening device. The intervertebral space opening device comprises an intervertebral insert and an opening clamp, wherein the intervertebral insert comprises a sheet body, a supporting part and a connector, and the opening clamp comprises a clamp head and a clamp handle; the supporting part is established lamellar body rear end, the connector is established on the supporting part, the connector is used for connecting the binding clip of strutting pincers, is equipped with the recess with connector matched with on the binding clip.

According to the intervertebral space expanding device in the patent document, the intervertebral space can be simply and effectively expanded by adopting the combined design of the intervertebral insertion piece and the expanding forceps, the expanded inner and outer widths of the gaps are close, the condition that the expanded intervertebral space is narrow in front and wide in back is avoided, the problems of end plate fracture, intervertebral fusion device collapse and the like when the intervertebral fusion device is forcibly placed into an intervertebral fusion device or a test mold are avoided, the operation process is accelerated, the operation time is shortened, the operation safety and the success rate are improved, and the pain of a patient is relieved; but the device in this utility model still has the risk that the intervertebral space struts the in-process endplate damage to and strut the comparatively loaded down with trivial details problem of operation mode.

In summary, there is a need for an intervertebral water sac spreader which has a simple structure, a low price, and a small volume, is particularly suitable for the operation of intervertebral distraction in a narrow space, can ensure the contact area with the vertebral end plate, and avoid the risk of injury caused by excessive stress of the end plate.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, provide a simple structure, low price, small, be particularly useful for the intervertebral struts operation in narrow and small space and use, and can guarantee with the area of contact of centrum end plate, avoid end plate stress too big and lead to damaging an intervertebral water pocket struts ware of risk.

In order to achieve the purpose, the utility model adopts the technical proposal that:

an intervertebral water sac spreader comprises a water injection pipeline and a water sac body; the water injection pipeline is of a Y-shaped structure; the water bag body is arranged at two ends of the upper side of the water injection pipeline, and the water bag body and the water injection pipeline are respectively connected in an integrated sealing way; the water injection pipeline is made of hard materials; the water sac body is planar in a normal state and is stereoscopic after being inflated by water.

As a preferred technical scheme, both ends of the upper side of the water injection pipeline are respectively connected with the bottom plane of the water bag body in a sealing manner.

As a preferred technical scheme, the water injection pipeline is made of medical stainless steel.

As a preferred technical scheme, the water bag body is of a cuboid structure after being injected with water.

As a preferred technical scheme, the water bag body is of a double-layer structure or a lengthened structure and is made of medical thickened PVC materials.

The utility model has the advantages that:

1. through water injection pipeline end respectively to water pocket body in water injection, the water pocket body just can automatic inflation and gradually bulge after the water injection takes shape, through with the water injection pipeline between opposite support effort, alright with upper and lower both ends centrum to opposite direction removal to effectively strut the intervertebral space.

2. Treat that intervertebral space is propped open the back, can directly put into the cage between the water pocket body after two water injections, be about to the cage is put into intervertebral space to play the purpose of recovering intervertebral space height and indirect decompression.

3. The water pocket body is the cuboid structure after the water injection, has six faces, and water injection pipeline upside both ends are connected with the plane of water pocket body bottom, so this makes cage be unobstructed in the route that gets into between two cuboid water pocket bodies, puts into the intervertebral space back at cage, through with the water discharge back of water injection pipeline in with the water pocket body, directly take out the water pocket body can.

4. The utility model provides a water pocket struts ware, only two simple structures of water injection pipeline and water pocket body, it is small, and all pass in and out intervertebral space with water injection state not during the use, the during operation water pocket body links to each other with external only leaning on a water injection pipeline with, does benefit to going on of operation, and the intervertebral that is applicable to narrow and small space struts the operation and uses, and the material all can adopt current medical material, and the price is very cheap.

5. Because the utility model provides a water pocket body has certain deformability after the water injection, and the edge is not the plane on the well-known centrum, but has the curvature, so the water pocket body can be effectual after the water injection with the laminating of centrum end plate, increase with the area of contact of end plate to the stress of dispersible end plate prevents that the end plate pressure is too big and causes the risk of damage, protection end plate that can be better.

6. The water sac body is of a double-layer structure or a structure formed by extending the water sac body, or is designed into different shapes according to different conditions of a vertebral body and an intervertebral space, so that the water sac body is more suitable for an end plate in an operation, the contact area of the water sac body and the end plate is enlarged, and the water sac body can be used for protecting the end plate when cage of a patient with severe osteoporosis is implanted.

Drawings

Fig. 1 is a schematic plane structure diagram of the intervertebral water sac spreader in a conventional state.

Fig. 2 is a structural schematic diagram of the water sac body of the intervertebral water sac spreader after water injection.

Fig. 3 is a schematic view of the cage of the intervertebral water sac spreader of the present invention when implanted.

Fig. 4 is a schematic diagram of the intervertebral water sac spreader after the cage of the utility model is inserted.

Detailed Description

The invention will be further described with reference to the following examples and with reference to the accompanying drawings.

The reference numerals and components referred to in the drawings are as follows:

1. water injection pipeline 2. water bag body

3. Intervertebral fusion device

Example 1

Referring to fig. 1-2, fig. 1 is a schematic plane structure of the intervertebral water sac spreader in a conventional state, and fig. 2 is a schematic structure of the intervertebral water sac spreader after water injection. An intervertebral water sac spreader comprises a water injection pipeline 1 and a water sac body 2; the water injection pipeline 1 is of a Y-shaped structure; the water bag body 2 is arranged at two ends of the upper side of the water injection pipeline 1, and the bottom plane of the water bag body 2 is respectively connected with the water injection pipeline 1 in an integrated sealing way; the water sac body 1 is planar in a normal state and is cubic after being inflated by water.

It should be noted that: the water injection pipeline 1 can be made of hard materials such as medical stainless steel and the like; the water sac body 2 can be made of medical double-layer thickened PVC material; after the intervertebral disc is taken out in the operation, the water sac bodies 2 can be respectively placed into the small intervertebral spaces in a bottom-down mode, and the water injection channel 1 plays a role in fixing and supporting the water sac bodies 2 at the moment; the water is respectively injected into the water bag body 2 through the tail end of the water injection pipeline 1, the water bag body 2 can automatically expand and gradually bulge to form after being injected with water, and at the moment, the upper and lower end centrums can move in opposite directions through the opposite supporting acting force between the water injection pipeline 1, so that the intervertebral space is effectively expanded; after the intervertebral space is expanded, the cage can be directly placed between the two water sac bodies 2 after water is injected, namely the cage is placed in the intervertebral space, so that the aims of recovering the height of the intervertebral space and indirectly reducing pressure are fulfilled; the water bag body 2 is preferably in a cuboid structure after water injection and has six surfaces, and two ends of the upper side of the water injection pipeline 1 are connected with the plane at the bottom of the water bag body 2, so that the path of cage entering between the two cuboid water bag bodies 2 is smooth; after the cage is placed in the intervertebral space, water in the water bag body 2 is discharged through the water injection pipeline 1, and then the water bag body 2 is directly pumped out; the water sac spreader of the utility model has two simple structures, namely the water injection pipeline 1 and the water sac body 2, has small volume, and can pass in and out of the intervertebral space in a state without water injection when in use, the water sac body 2 is connected with the outside of the body by only one water injection pipeline 1 when in work, thereby being beneficial to the operation, being applicable to the operation of intervertebral distraction in narrow space, and the materials can all adopt the existing medical materials, and the price is very low; because the utility model provides a water pocket body 2 has certain deformability after the water injection, and the edge is not the plane on the well-known centrum, but has the curvature, so water pocket body 2 can be effectual after the water injection with the laminating of centrum end plate, increase with the area of contact of end plate to the stress of dispersible end plate prevents that the end plate pressure is too big and causes the risk of damage, protection end plate that can be better.

Example 2

The embodiment is basically the same as the embodiment 1, except that the water sac body 2 in the embodiment is of a double-layer structure or a body re-extension structure, so that the contact area with an end plate can be enlarged in the operation, and the water sac body is used for protecting the end plate when a cage of a patient with severe osteoporosis is implanted; the water sac body 2 in this embodiment may also be designed into different shapes for different situations of the vertebral body and the intervertebral space, for example, into a cone shape after water injection, so as to be more suitable for the end plate.

In the intervertebral water sac spreader, water is respectively injected into the water sac body through the tail end of the water injection pipeline, the water sac body can automatically expand and gradually bulge to form after being injected with water, and the upper and lower vertebral bodies can be moved in opposite directions through opposite supporting acting force between the water sac body and the water injection pipeline, so that intervertebral space is effectively spread; after the intervertebral space is expanded, the cage can be directly placed between the two water sac bodies after water is injected, namely the cage is placed in the intervertebral space, so that the aims of recovering the height of the intervertebral space and indirectly reducing pressure are fulfilled; the water bag body is of a cuboid structure after water injection and is provided with six surfaces, and two ends of the upper side of the water injection pipeline are connected with the plane at the bottom of the water bag body, so that a path for cage to enter between the two cuboid water bag bodies is smooth, and after the cage is placed in an intervertebral space, water in the water bag body is discharged through the water injection pipeline, and then the water bag body is directly pumped out; the water sac spreader has two simple structures of a water injection pipeline and a water sac body, has small volume, and can pass in and out of the intervertebral space in a non-water injection state when in use, the water sac body is connected with the outside of the body by only one water injection pipeline during work, thereby being beneficial to the operation, being applicable to the operation and use of intervertebral spreading operation in narrow space, and the materials can adopt the existing medical materials, and the price is very low; because the water sac body in the utility model has a certain deformation capacity after water injection, and the upper and lower edges of the centrum are not planes but curved as well known, the water sac body can be effectively attached to the centrum end plate after water injection, so that the contact area between the water sac body and the end plate is increased, the stress of the end plate can be dispersed, the risk of damage caused by overlarge pressure of the end plate is prevented, and the end plate can be better protected; the water sac body is of a double-layer structure or a structure formed by extending the water sac body, or is designed into different shapes according to different conditions of a vertebral body and an intervertebral space, so that the water sac body is more suitable for an end plate in an operation, the contact area of the water sac body and the end plate is enlarged, and the water sac body can be used for protecting the end plate when cage of a patient with severe osteoporosis is implanted.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the principles of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.

Claims (5)

1. An intervertebral water sac spreader is characterized by comprising a water injection pipeline and a water sac body; the water injection pipeline is of a Y-shaped structure; the water bag body is arranged at two ends of the upper side of the water injection pipeline, and the water bag body and the water injection pipeline are respectively connected in an integrated sealing way; the water injection pipeline is made of hard materials; the water sac body is planar in a normal state and is cubic after being inflated by water.

2. The intervertebral water sac spreader according to claim 1, wherein both ends of the upper side of the water injection pipeline are respectively connected with the bottom plane of the water sac body in a sealing manner.

3. The intervertebral water sac spreader according to claim 2, wherein the water injection pipe is made of medical stainless steel.

4. The intervertebral water sac spreader according to claim 2, wherein the water sac body is of a rectangular parallelepiped structure after being filled with water.

5. The intervertebral water sac spreader according to claim 4, wherein the water sac body has a double-layer structure or an elongated structure and is made of medical thickened PVC material.

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