CN210204887U - Blocking type vertebra filling device - Google Patents

Abstract

The utility model discloses a block type vertebra filling device, include: the device comprises an opening device and a capsule wall structure, wherein the capsule wall structure is arranged on the opening device; the strutting device comprises at least two support rods, and the far ends of the support rods are of pre-bending memory structures; when the plurality of pre-bending memory structures are subjected to external pressure, the plurality of pre-bending memory structures are concentrated towards the same central shaft, and the capsule wall structure is retracted to form a strip-shaped structure; when the plurality of pre-bending memory structures are not subjected to external pressure, the plurality of pre-bending memory structures restore the pre-bending shape and prop open the cyst wall structure to form a barrier wall; the surface of the opening device connected with the capsule wall structure is a circular arc surface, and another blocking type vertebral filling device is further provided. The utility model discloses can block the dispersion of a certain position pulpiness medicine material in the centrum, nevertheless keep the normal dispersion of other space pulpiness medicine materials, can also protect centrum perisporium cortex bone and have had damaged position, block bone cement from near crack dispersion, it is effectual to perform the operation.

Description

Blocking type vertebra filling device

Technical Field

The utility model relates to a spine surgical instrument, in particular to a blocking type spine filling device.

Background

The best method for dealing with vertebral compression fracture mainly comprises percutaneous vertebroplasty and percutaneous kyphoplasty, wherein the vertebroplasty is more used and has wider application. Improvements to vertebroplasty have been continued since the first percutaneous vertebroplasty started in 1984, and percutaneous vertebroplasty generally used to create a passage and introduce bone cement (e.g., PMMA) into the vertebral body to provide sufficient support between the trabeculae in the vertebral body to prevent compression fracture and pain in the affected vertebrae.

However, in the case of a patient with a compression fracture of the vertebral body or a tumor of the vertebral body, a fracture of the fracture or osteolytic destruction of cortical bone by osteolytic tumor may cause partial incompletion of the cortical bone. In this case, the treatment with conventional vertebroplasty procedure (PVP) is relatively risky, since in this case the bone cement is very likely to leak out of the cracks in the peripheral wall under high pressure perfusion if the physician adopts open surgery or vertebroplasty, i.e. perfusion of the bone cement directly into the vertebral body.

After the cavity in the vertebral body is expanded through the vertebral body dilatation balloon catheter (PKP), the bone cement is filled into the defected vertebral body at low pressure, and other problems can be met under the condition that the flow direction of the bone cement is uncontrollable and the bone cement leakage risk still exists. For example in bone tumor patient's treatment, because osteolysis's destruction, easily cause the damage of backbone centrum cortex bone, like the incompleteness of centrum back wall etc. use intervention instrument of this kind of punching press expansion of centrum expansion sacculus all to have the possibility that causes the centrum back wall pressurized to consequently lead to the spinal canal occupy-place, the neural oppression reaction appears, and the postoperative even still needs open decompression to alleviate pain.

In addition, doctors also implant bone cement through the bone cement bag/bone cement mesh bag, and in the operation of partial incomplete perisporium cortical bone, the operation mode adopting the bag structure has the following defects:

1. in the bone tissue environment, if the bag structure is only opened by filling the pulpiness medical material, the pulpiness medical material is easy to leak under the condition of large aperture, and after the pressure is released, the bag structure can not be opened. Under the condition that the aperture is little, pulpiness medical material is more thick and sticky, and pressure device feedback pressure is stronger, and under the extremely high condition of pressure, can influence strutting of utricule structure, also has clinical operation risk.

2. The leakage degree of the existing bag structure for preventing bone cement is still insufficient, because the pulpiness medical material is concentrated in the bag body structure, the pressure is concentrated, and the pulpiness medical material is easy to leak out from the gap of the woven bag structure at the stage of low viscosity. When the capsule structure has a large aperture on one side and a small aperture on the other side, if the injection speed of the slurry medical material is high or the slurry medical material is thin and the pressure is not released from the large aperture side temporarily, there is still a possibility that a large amount of the drug may leak from the small aperture side.

3. The existing capsular bag structure is generally in an elliptical olive shape, so that pulpous medical materials can be concentrated in the whole capsular bag structure, common pulpous medical materials such as bone cement and the like can release high-energy heat during curing, and the larger the lumping shape is, the more concentrated the energy is, and other tissues are easier to burn.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a block type vertebra filling device can block dispersion of some place pulpiness medical material in the centrum, nevertheless remains the normal dispersion of other space pulpiness medical materials, can also protect centrum perisporium cortex bone and have had damaged position, blocks bone cement from near crack dispersion, and it is effectual to operate.

The utility model provides a technical scheme as follows:

a barrier vertebral filling device comprising: an expansion device and a capsule wall structure, the capsule wall structure being disposed on the expansion device; the strutting device comprises at least two support rods, and the far ends of the support rods are of pre-bending memory structures; when the plurality of pre-bending memory structures are subjected to external pressure, the plurality of pre-bending memory structures are concentrated towards the same central axis, and the capsule wall structure is retracted to form a strip-shaped structure; when the plurality of pre-bending memory structures are not subjected to external pressure, the plurality of pre-bending memory structures restore the pre-bending shape and prop open the capsule wall structure to form a barrier wall; the surface of the opening device connected with the capsule wall structure is an arc surface.

In the structure, after the capsule wall structure and the distraction device reach the target position through the introduction channel, the distraction device is unfolded and enables the capsule wall structure to be unfolded to form a barrier wall, the barrier wall can avoid the random dispersion of bone cement, and the simple barrier of the bone cement in a certain direction has better advantages on reducing the bone cement leakage risk of a certain part, thereby realizing the dispersion with more tendentiousness and constraint, effectively reducing the damage to the anterior and longitudinal ligaments and the damage and the compression to the spinal nervous system of the posterior edge, reducing the damage to the surrounding muscle tissues and the vascular tissues, effectively solving the leakage problem when the bone cement is poured, reducing the complications and reducing the risk of pulmonary embolism, and when the device is adopted, the bone cement implanted into the vertebral body can not be concentrated in the capsule bag, so that the energy is more dispersed and other tissues are not easy to burn. Wherein, strutting arrangement comprises the support stick that has the memory of preflex, and when strutting arrangement passes through leading-in passageway, the support stick becomes straight strip type structure under the restraint of leading-in passageway to be convenient for through leading-in passageway, after strutting arrangement arrived the target point position through leading-in passageway, the support stick no longer received the constraining force, thereby resume the preflex shape, and drive the cyst wall structure and strut and form the barrier wall, the strutting arrangement simple structure of this kind of structure, the control of being convenient for.

Preferably, the distraction device further comprises at least one ring, and the ring is movably sleeved outside the plurality of support rods; when the ring is sleeved at the pre-bending memory structures, external pressure is applied to the pre-bending memory structures by the ring, and the pre-bending memory structures are concentrated to the same central axis and the capsule wall structure is retracted to form the strip-shaped structure; when the loop is removed from the pre-curved memory structures, the plurality of pre-curved memory structures resume a pre-curved shape and distract the capsule wall structure to form the barrier wall.

In the structure, the opening device can control the deformation of the pre-bending support rod through the ring, when the capsule wall structure is not required to be opened by the opening device, the ring is always sleeved on the pre-bending support rod, when the capsule wall structure is required to be opened by the opening device, the ring is removed from the pre-bending support rod, and the pre-bending support rod can be restored to the pre-bending shape, so that the control is convenient.

Preferably, the capsule wall structure is a capsule bag, the capsule bag is provided with an injection port, and the distraction device is inserted into the capsule bag through the injection port.

In the structure, the capsule wall structure can be set into the capsule bag, and when the capsule wall structure is expanded, bone cement can be injected into the capsule bag, so that the structural strength of the capsule wall structure is stronger.

Preferably, an expansion balloon is arranged in the balloon bag and is connected with an external pressurizing device.

In the structure, when the capsule wall structure is a capsule bag, an expansion balloon can be placed in the capsule bag, the expansion device is driven to expand through expansion of the expansion balloon, and the expansion device is kept in an expanded state, so that the capsule wall structure can be fully expanded and kept in the expanded state.

A barrier vertebral filling device comprising: an expansion device and a capsule wall structure, the capsule wall structure being disposed on the expansion device; the distraction device comprises a pair of oppositely arranged support rods and at least one elastic part, the support rods are arranged at two ends of the elastic part, when the support rods are subjected to opposite external pressure, the elastic part is in a compressed state, and when the support rods are not subjected to external pressure, the elastic part distracts the support rods and drives the capsule wall structure to expand to form a barrier wall; the surface of the support rod connected with the capsule wall structure is an arc surface, and the surface contacted with the elastic piece is a plane.

In the structure, the strutting arrangement comprises the support rod and the elastic part, the support rod limits and supports the expansion of the capsule wall structure in the first direction, the elastic part can limit and support the expansion of the capsule wall structure in the second direction, and the elastic part drives the capsule wall structure to expand when expanding in the contraction state, so that the expansion of the capsule wall structure can be better controlled, and the expanding direction and the expanding range of the capsule wall structure are within the target range.

Preferably, the capsule wall structure is a capsule bag, the capsule bag is provided with an injection port, and the distraction device is inserted into the capsule bag through the injection port.

In the structure, the capsule wall structure can be set into the capsule bag, and when the capsule wall structure is expanded, bone cement can be injected into the capsule bag, so that the structural strength of the capsule wall structure is stronger.

Preferably, an expansion balloon is arranged in the balloon bag and is connected with an external pressurizing device.

In the structure, when the capsule wall structure is a capsule bag, an expansion balloon can be placed in the capsule bag, the expansion device is driven to expand through expansion of the expansion balloon, and the expansion device is kept in an expanded state, so that the capsule wall structure can be fully expanded and kept in the expanded state.

The utility model provides a pair of block type vertebra filling device can bring following beneficial effect:

when the vertebra filling device in the utility model passes through the leading-in channel, the capsule wall structure and the opening device are both in a packed state and are in a strip structure, thereby being convenient for passing through the leading-in channel, after reaching the target position through the leading-in channel, the opening device is expanded and the capsule wall is expanded to form a barrier wall, the barrier wall can avoid the wantonly dispersion of bone cement, the simple barrier wall can simply prevent the dispersion of the bone cement to a certain direction, thereby having better advantage in reducing the leakage risk of the bone cement at a certain position, thereby realizing the dispersion with more tendency and constraint, effectively reducing the damage to the anterior longitudinal ligament, breaking and oppressing the posterior spinal cord nervous system, reducing the damage to the surrounding muscle tissue and vascular tissue, effectively solving the leakage problem when filling the bone cement, reducing complications and pulmonary embolism risk, and when adopting the device, the bone cement implanted in the vertebra body can not be concentrated in the capsule bag, therefore, the energy is more dispersed and the other tissues are not easy to burn.

Drawings

The foregoing features, technical features, advantages and implementations of the barrier vertebral filling device will be further described in the following, in a clearly understood manner, with reference to the accompanying drawings, which illustrate preferred embodiments.

FIG. 1 is a schematic view of the barrier vertebral filling device after distraction from the spine;

fig. 2 is a schematic view of the distractor.

The reference numbers illustrate:

1-opening device, 11-supporting rod, 12-pre-bending memory structure and 2-capsule wall structure.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure of the product.

[ example 1 ]

As shown in fig. 1 to 2, example 1 discloses a specific embodiment of a blocking type spinal filling device, which includes a distraction device 1 and a capsule wall structure 2, wherein the capsule wall structure 2 is disposed on the distraction device 1.

Specifically, the distractor 1 comprises two support rods 11, the proximal ends of the support rods 11 are directly or indirectly connected together and keep a relatively fixed state, and the distal ends of the support rods 11 are pre-bent memory structures 12.

When the opening device 1 passes through the guide channel, the guide channel applies external pressure to the pre-bending memory structures 12, so that the pre-bending memory structures 12 are concentrated towards the same central axis and the capsule wall structure 2 is retracted to form a strip-shaped structure, and the support rod 11 can drive the capsule wall structure 2 to reach a target position through the guide channel.

After the pre-bending memory structure 12 of the support rod 11 reaches the target position, the pre-bending memory structure 12 is no longer subjected to external pressure, as shown in fig. 1, the pre-bending memory structure 12 recovers the pre-bending shape and props up the capsule wall structure 2 to form a barrier wall.

The capsule wall structure 2 in this embodiment is a sheet-like structure, a pair of opposite side ends of the sheet-like structure are respectively fixed on a pair of support rods 11, and when the pre-bending memory structure 12 in the support rods 11 recovers the pre-bending shape, the two support rods 11 pull the capsule wall structure 2 in a direction away from each other to expand the capsule wall structure. The surface of the strutting device 1 connected with the capsule wall structure 2 is an arc surface, the outer surface of the pre-bending memory structure 12 is connected with the capsule wall structure 2, and the outer surface of the pre-bending memory structure 12 is an arc surface, so that the pre-bending memory structure 12 can smoothly pass through the leading-in channel.

The blocking type spine filling device in the embodiment is simple in structure and easy to operate, the opening device 1 opens the capsule wall structure 2 at the target point position to form a blocking wall, the blocking wall can block dispersion of pulpous medical materials in a certain direction, normal dispersion of pulpous medical materials in other spaces is reserved, damaged parts of cortical bone in the peripheral wall of the vertebral body can be protected, bone cement is prevented from being dispersed from the vicinity of cracks, and postoperative complications can be effectively avoided. After the perfusion of the pulpiness medical material is finished, the distraction device 1 can be pulled back, and the distraction device 1 and the capsule wall structure 2 are taken out at one time, so that the operation is convenient and fast.

In other embodiments of the present invention, the specific structure of the distraction device 1, the specific structure of the capsule wall, and the connection relationship between the distraction device 1 and the capsule wall structure 2 can be adjusted according to actual needs; the manufacturing material of the capsule wall structure 2 can be elastic or non-elastic material, can be non-airtight material or woven material, and the specific material can be selected according to the requirement; the cross section of the support rod 11 can be cylindrical, semi-cylindrical, rectangular, rhombic and the like; the blocking wall can be in the shape of a square, a diamond, a rectangle, a circle, a sector, an ellipse and the like; in the case where the capsule wall structure 2 is not fixed to the distractor 1, the capsule wall structure 2 may be selectively implanted or the capsule wall structure 2 may be removed by pulling with a proximal cable or the like.

[ example 2 ]

Example 2 on the basis of example 1, the structure of example 2 is substantially the same as that of example 1, except that in this example, the expanding device includes a ring connected to an external cable, and the ring is movably sleeved outside the support rods, that is, the ring retracts the support rods together. When the ring is sleeved at the pre-bending memory structures, external pressure is applied to the pre-bending memory structures by the ring, and the pre-bending memory structures are concentrated towards the same central shaft and retract the capsule wall structure to form a strip-shaped structure, so that the capsule wall structure can conveniently pass through the guide-in channel. When the ring is removed from the pre-bending memory structure, the pre-bending memory structure is not restrained by the ring, thereby restoring the pre-bending shape and expanding the capsule wall structure to form the barrier wall. The loop may be pulled directly by an external cable or by an axle structure.

The blocking type vertebral filling device in the embodiment controls the pre-bending memory structure through the control ring, can better control the distraction device, and can accurately distract the capsule wall structure at the target point position.

In other embodiments of the barrier vertebral filling device of the present invention, the number of loops can be two or more as desired; the loop may also be controlled by a pull rod or other structure, without limitation.

[ example 3 ]

Example 3 is substantially the same as example 1 in structure, and example 3 is different from example 1 in that the specific structure of the wall structure of example 3 is different, in this example, the wall structure is a bag, the bag has an injection port, and the distraction device is inserted into the bag through the injection port. After the opening device opens the sac, bone cement can be injected into the sac, and it should be noted that the bone cement in the sac is not used for filling the bone cement in the vertebral body, and the bone cement in the sac is used for enhancing the overall strength of the sac wall structure, so that a good local barrier is formed in the vertebral body.

Of course, the wall structure of the balloon in the barrier-type spinal filling device of embodiment 2 could be replaced by a balloon.

[ example 4 ]

Example 4 based on example 3, the balloon of example 4 was provided with an inflatable balloon, which was connected to an external pressurizing device. When the far end of the distraction device reaches the target point position, the pressurization device pressurizes the expansion saccule to expand the expansion saccule, so that the distraction device is distracted and kept in the distraction state.

Of course, if the wall structure of the balloon in the spinal filling device of embodiment 2 is also replaced by a balloon, an expansion balloon connected to an external pressurizing device may be added to the balloon.

[ example 5 ]

Example 5 discloses another specific implementation of a barrier vertebral filling device, and the structure of example 5 is substantially the same as that of example 1, except that the specific structure of the distraction device of example 5 is different from that of example 1, in this example, the distraction device comprises a pair of oppositely arranged support rods and a pair of elastic members arranged in parallel, the pair of support rods are arranged at two ends of the pair of elastic members, and the distance between the pair of support rods is changed when the elastic members contract and extend.

When the vertebral filling device passes through the guide channel, the guide channel applies relative external pressure to the pair of support rods, the space between the pair of support rods is reduced and the elastic piece is compressed, and the capsule wall structure is collected on the distraction device to form a strip-shaped structure, so that the vertebral filling device is convenient to pass through the guide channel.

After the distraction device reaches the target position, the guide-in channel does not apply external pressure to the support rods any more, and the elastic piece expands and distracts the pair of support rods from the compressed state, so that the distance between the pair of support rods is increased, and meanwhile, the capsule wall structure is driven to expand to form the barrier wall. The peripheries of the capsule wall structures can be limited by the pair of elastic pieces and the pair of support rods, so that the expansion range of the capsule wall structures can be effectively limited, and the capsule wall structures are prevented from being excessively expanded by the pressure of the implanted pulpy medical material.

In this embodiment, the surface of the support rod connected with the capsule wall structure is a circular arc surface, so that the connection between the capsule wall structure and the support rod is facilitated, and the surface of the support rod connected with the capsule wall structure can be contacted with the guide channel when passing through the guide channel, so that the circular arc surface facilitates the distraction device to pass through the guide channel, and the surface of the support rod contacted with the elastic member is a plane, so that the connection between the support rod and the elastic member is facilitated.

In other embodiments of the blocking-type spine filling device of the present invention, only one elastic member may be provided, or three or more elastic members may be provided; the specific structure of the elastic part can be specifically selected according to the requirement; the specific connection mode and the arrangement form of the elastic piece and the support rod can be adjusted according to actual needs.

[ example 6 ]

Example 6 is substantially the same as example 5 in structure, and example 6 is different from example 5 in that the specific structure of the wall structure of example 6 is different, in this example, the wall structure is a pouch, the pouch has an injection port, and the distraction device is inserted into the pouch through the injection port. After the opening device opens the sac, bone cement can be injected into the sac, and it should be noted that the bone cement in the sac is not used for filling the bone cement in the vertebral body, and the bone cement in the sac is used for enhancing the overall strength of the sac wall structure, so that a good local barrier is formed in the vertebral body.

[ example 7 ]

Example 7 based on example 6, the balloon of example 7 was provided with an inflatable balloon connected to an external pressurizing device. When the far end of the distraction device reaches the target point position, the pressurization device pressurizes the expansion saccule to expand the expansion saccule, so that the distraction device is distracted and kept in the distraction state.

[ example 8 ]

Example 8 discloses another specific implementation of the barrier vertebral filling device, and example 8 is a further improvement on the basis of examples 3, 4, 6 or 7, in this example, the distraction device is not fixedly connected with the capsule wall structure, and after the perfusion of the pulpous medical material is completed, the distraction device can be pulled back, the distraction device is taken out from the vertebral body, and the capsule wall structure is implanted in the vertebral body.

Of course, in other embodiments of the present invention, the opening device may be detachably connected to the bladder wall structure when the bladder wall structure is a non-bladder structure.

It should be noted that the above embodiments can be freely combined as necessary. 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 modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (7)

1. A barrier vertebral filling device, comprising:

an expansion device and a capsule wall structure, the capsule wall structure being disposed on the expansion device;

the strutting device comprises at least two support rods, and the far ends of the support rods are of pre-bending memory structures;

when the plurality of pre-bending memory structures are subjected to external pressure, the plurality of pre-bending memory structures are concentrated towards the same central axis, and the capsule wall structure is retracted to form a strip-shaped structure;

when the plurality of pre-bending memory structures are not subjected to external pressure, the plurality of pre-bending memory structures restore the pre-bending shape and prop open the capsule wall structure to form a barrier wall;

the surface of the opening device connected with the capsule wall structure is an arc surface.

2. The barrier vertebral filling device of claim 1, wherein:

the strutting device also comprises at least one ring, and the ring is movably sleeved outside the plurality of support rods;

when the ring is sleeved at the pre-bending memory structures, external pressure is applied to the pre-bending memory structures by the ring, and the pre-bending memory structures are concentrated to the same central axis and the capsule wall structure is retracted to form the strip-shaped structure;

when the loop is removed from the pre-curved memory structures, the plurality of pre-curved memory structures resume a pre-curved shape and distract the capsule wall structure to form the barrier wall.

3. The barrier vertebral filling device according to any one of claims 1-2, wherein:

the capsule wall structure is a capsule bag, the capsule bag is provided with an injection opening, and the distraction device is inserted into the capsule bag through the injection opening.

4. The barrier vertebral filling device of claim 3, wherein:

an expansion sacculus is arranged in the sac and is connected with an external pressurizing device.

5. A barrier vertebral filling device, comprising:

an expansion device and a capsule wall structure, the capsule wall structure being disposed on the expansion device;

the distraction device comprises a pair of oppositely arranged support rods and at least one elastic part, the support rods are arranged at two ends of the elastic part, when the support rods are subjected to opposite external pressure, the elastic part is in a compressed state, and when the support rods are not subjected to external pressure, the elastic part distracts the support rods and drives the capsule wall structure to expand to form a barrier wall;

the surface of the support rod connected with the capsule wall structure is an arc surface, and the surface contacted with the elastic piece is a plane.

6. The barrier vertebral filling device of claim 5, wherein:

the capsule wall structure is a capsule bag, the capsule bag is provided with an injection opening, and the distraction device is inserted into the capsule bag through the injection opening.

7. The barrier vertebral filling device of claim 6, wherein:

an expansion sacculus is arranged in the sac and is connected with an external pressurizing device.

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