Backbone support
Technical Field
The invention relates to the field of medical equipment, in particular to a spinal bracket.
Background
The incidence of osteoporotic vertebral fractures worldwide is 140 tens of thousands per year, and this figure will increase progressively as aging progresses worldwide. Complications such as chronic low back pain, reduced activity, significant spinal deformity, etc. have greatly reduced the quality of life of such patients, even at best due to kyphosis deformity or prolonged bed rest. Minimally invasive percutaneous vertebral body augmentation is widely used for patients with partial osteoporosis or pathological spine fracture because of its technical minimally invasive nature, and the ability to quickly relieve pain and restore patient function.
In 1984, french Galibert et al reported percutaneous vertebroplasty that bone cement was injected into the vertebral body by percutaneous placement of a cannula to stabilize the fracture, alleviating pain, and since then, the age of percutaneous vertebroplasty was opened, but the higher cement leakage rate, the vertebral body height recovery was poor, and various improvements were made in terms of fracture vertebral body reinforcement re-collapse, leakage reduction, etc. But are all non-degradable materials.
Currently, the metal implant materials used for the internal expandable stent of the vertebral body comprise titanium alloy, nickel alloy and cobalt-chromium alloy, the metals have good corrosion resistance, and can keep stable structure in the body for a long time, but the alloys can generate toxic metal ions in the body due to abrasion, can cause anaphylactic reaction or inflammation and reduce the biocompatibility. The material is non-degradable material, and complications such as fracture, dislocation and the like are likely to occur in long term. In recent years, scholars at home and abroad have conducted a great deal of research on biomedical degradable metal implant materials, and magnesium alloy has the advantages of good absorbability, biocompatibility, complete degradability and low price, has the effect of promoting bone formation, and becomes a research hot spot in the field of biomedical degradable metal implant materials.
Disclosure of Invention
Based on the above, the invention aims to provide the spinal bracket which has simple structure, convenient use, good reduction supporting effect and can be placed in the body.
The spinal column bracket comprises a catheter, an air bag and a magnesium alloy telescopic body;
The balloon is arranged on the catheter and is communicated with the catheter;
the magnesium alloy telescopic body is provided with a front end and a rear end, a telescopic part is arranged between the front end and the rear end, and the telescopic part is coated on the air bag;
in the expanded state, the cross-sectional area of the front end is greater than the cross-sectional area of the rear end.
According to the spinal bracket, the catheter, the air bag and the magnesium alloy telescopic body are arranged, the air bag and the magnesium alloy telescopic body can be guided into the vertebral body by the catheter, and the air bag is inflated by injecting the contrast agent through the catheter, so that the magnesium alloy telescopic body is transversely expanded and longitudinally expanded, the compression fracture vertebral body is reset, after the vertebral body is reset, the magnesium alloy telescopic body can play a supporting role to maintain the restoration state of the vertebral body, the magnesium alloy telescopic body can be remained in the vertebral body, bone cement or bone materials are conveniently injected, and the height of the vertebral body and the lobe angle after correction can be effectively maintained; the magnesium alloy telescopic body has enough structural strength, can prevent the propped vertebral body from re-collapsing, and has the effect of promoting bone formation in the degradation process; in addition, the cross section area of the front end is set to be larger than that of the rear end in the expansion state, so that the device can better play a role in supporting and resetting according to the operation practice and the optimal form obtained by the human spine structure, and the postoperative recovery effect is better.
Further preferably, the magnesium alloy telescopic body is a magnesium alloy wire mesh. The magnesium alloy telescopic body is arranged as a magnesium alloy wire mesh, the magnesium alloy wire mesh has enough structural strength, and the magnesium alloy has the effect of promoting bone formation in the degradation process.
Further preferably, the magnesium alloy telescopic body comprises a plurality of support strips, and the support strips are mutually crossed and hinged to form a telescopic net structure. The telescopic net structure is formed by mutually intersecting and hinging the support strips, so that the magnesium alloy telescopic body can be conveniently unfolded and expanded when the air bag is inflated.
Further preferably, the plurality of branch bars are all arc-shaped. And a plurality of support strips are all arranged in an arc shape, so that each expanded support strip has a smooth surface, and secondary damage to the vertebral body is prevented.
Further preferably, all cross sections of the magnesium alloy telescopic body along the radial direction of the catheter are circular, and in the expanded state, the vertical distance between the position with the largest cross section area and the front end is smaller than the vertical distance between the position with the largest cross section area and the rear end.
Setting the cross section area of the magnesium alloy telescopic body to be round, so that the surface of the magnesium alloy telescopic body is smooth, and damage to the vertebral body is prevented; the vertical distance between the position with the largest cross-sectional area and the front end is set to be smaller than the vertical distance between the position with the largest cross-sectional area and the rear end, so that the front part and the rear part of the expanded magnesium alloy telescopic body are thick, and the function of supporting and resetting can be better achieved.
Further preferably, the front end of the catheter is provided with a limiting protrusion for limiting;
the air bag is provided with a sleeved hole, the air bag is sleeved on the catheter through the sleeved hole, and contrast agent can be injected into the air bag;
The front end and the rear end of the magnesium alloy telescopic body are respectively provided with an opening, and the magnesium alloy telescopic body is sleeved on the guide pipe through the openings.
The front end of the catheter is provided with a limiting bulge, so that the magnesium alloy telescopic body can be better guided into the vertebral body; the air bag is sleeved on the catheter through the sleeved hole, so that the air bag is fixed more firmly and is beneficial to expanding and expanding; contrast agent can be injected into the air bag, so that X-ray perspective development is facilitated, and doctor control is facilitated; the magnesium alloy telescopic body is sleeved on the guide pipe through the opening, so that the magnesium alloy telescopic body can be conveniently guided into the vertebral body, and the guide pipe can be conveniently pulled out to be placed in the body.
Further preferably, in the contracted state, the length of the magnesium alloy telescopic body along the axial direction of the catheter is 20-32mm;
In the maximum expansion state, the maximum height of the magnesium alloy telescopic body along the radial direction of the catheter is 12-22mm, and the maximum volume of the magnesium alloy telescopic body is 4.2-5.8ml.
The magnesium alloy telescopic body can have different specifications according to the size of the spine of the patient.
Further preferably, in the contracted state, the length of the magnesium alloy telescopic body along the axial direction of the catheter is 22mm;
in the maximum expansion state, the maximum height of the magnesium alloy telescopic body along the radial direction of the catheter is 15mm, and the maximum volume of the magnesium alloy telescopic body is 4.5ml. The magnesium alloy telescopic body with the specification is suitable for patients with smaller vertebral bodies.
Further preferably, in the contracted state, the length of the magnesium alloy telescopic body along the axial direction of the catheter is 27mm;
in the maximum expansion state, the maximum height of the magnesium alloy telescopic body along the radial direction of the catheter is 17mm, and the maximum volume of the magnesium alloy telescopic body is 5.0ml. The magnesium alloy telescopic body with the specification is suitable for patients with middle vertebral body size.
Further preferably, in the contracted state, the length of the magnesium alloy telescopic body along the axial direction of the catheter is 31mm;
In the maximum expansion state, the maximum height of the magnesium alloy telescopic body along the radial direction of the catheter is 17mm, and the maximum volume of the magnesium alloy telescopic body is 5.5ml. The magnesium alloy telescopic body with the specification is suitable for patients with larger vertebral bodies.
The spinal bracket has the beneficial effects that:
(1) According to the spinal bracket, the catheter, the air bag and the magnesium alloy telescopic body are arranged, the air bag and the magnesium alloy telescopic body can be guided into the vertebral body by the catheter, and the air bag is inflated by injecting the contrast agent through the catheter, so that the magnesium alloy telescopic body is transversely expanded and longitudinally expanded, the compression fracture vertebral body is reset, after the vertebral body is reset, the magnesium alloy telescopic body can play a supporting role, the vertebral body restoration state is maintained, the magnesium alloy telescopic body can be remained in the vertebral body, bone cement or bone materials are conveniently injected, and the vertebral body height and the lobe angle after correction can be effectively maintained.
(2) The magnesium alloy telescopic body has enough structural strength, can prevent the propped vertebral body from re-collapsing, and has the effect of promoting bone formation in the degradation process.
(3) The cross section area of the front end is larger than that of the rear end in the expansion state, so that the device can better play a role in supporting and resetting according to the operation practice and the optimal form obtained by the human spine structure, and the postoperative recovery effect is better.
(4) The spinal bracket has the characteristics of simple structure, convenient use, good reduction supporting effect, capability of being placed in the body and the like.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic view of the spinal bracket of the present invention in a preferred collapsed configuration.
Fig. 2 is a schematic view of the spinal bracket of the present invention in a preferred structurally expanded condition.
FIG. 3 is a schematic view of a preferred structure of the spinal bracket of the present invention extending into the spinal column.
Fig. 4 is a schematic view of a preferred construction of the spinal bracket of the present invention in an expanded state of the magnesium alloy telescopic body.
FIG. 5 is a schematic view of a magnesium alloy telescopic body in a vertebral body.
Detailed Description
Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts. Therefore, the position and the use state of the device may be changed accordingly. These and other directional terms should not be construed as limiting terms.
Example 1
Please refer to fig. 1 and 2. FIG. 1 is a schematic view of the spinal bracket of the present invention in a preferred collapsed configuration. Fig. 2 is a schematic view of the spinal bracket of the present invention in a preferred structurally expanded condition. The spinal bracket comprises a catheter 1, an air sac and a magnesium alloy telescopic body 2.
The balloon is arranged on the catheter 1 and is communicated with the catheter 1; the magnesium alloy telescopic body 2 is provided with a front end 21 and a rear end 22, a telescopic part is arranged between the front end 21 and the rear end 22, and the telescopic part is coated on the air bag; in the expanded state, the cross-sectional area of the front end 21 is greater than the cross-sectional area of the rear end 22.
Specifically, the front end of the catheter 1 is provided with a limiting protrusion 11 for limiting. The front end of the catheter 1 is provided with the limit bulge 11, so that the magnesium alloy telescopic body 2 can be better guided into the vertebral body.
The air bag is provided with a sleeving hole, and the air bag is sleeved on the catheter 1 through the sleeving hole. The front end 21 and the rear end 22 of the magnesium alloy telescopic body 2 are respectively provided with an opening, and the magnesium alloy telescopic body 2 is sleeved on the guide pipe 1 through the openings. In addition, the size of the opening after expansion is larger than the limit bump 11 of the catheter 1, so as to facilitate the withdrawal of the catheter 1.
The air bag is sleeved on the catheter 1 through the sleeved hole, so that the air bag is fixed more firmly and is beneficial to expansion; the magnesium alloy telescopic body 2 is sleeved on the guide pipe 1 through the opening, so that the magnesium alloy telescopic body can be conveniently guided into the vertebral body, and the guide pipe 1 can be conveniently pulled out to keep the magnesium alloy telescopic body 2 in the body.
In addition, the air bag can be preferably injected with contrast agent, so that the X-ray perspective development is convenient, and the doctor can conveniently control.
The magnesium alloy telescopic body 2 of the embodiment is a magnesium alloy wire mesh. The magnesium alloy telescopic body 2 is arranged as a magnesium alloy wire mesh which has enough structural strength and has the function of promoting bone formation in the degradation process.
The magnesium alloy telescopic body 2 comprises a plurality of support strips 20, and the support strips 20 are mutually crossed and hinged to form a telescopic net structure. By mutually intersecting and hinging a plurality of support strips 20 to form a telescopic net structure, the magnesium alloy telescopic body 2 is conveniently unfolded and expanded when the air bag is inflated.
Preferably, the plurality of branch bars 20 are all circular arc-shaped. The plurality of support bars 20 are all arranged in a circular arc shape, so that each support bar 20 after expansion has a smooth surface, and secondary damage to the vertebral body is prevented.
Further preferably, all cross sections of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 are circular, and in the expanded state, the position with the largest cross section area is at a smaller vertical distance from the front end 21 than from the rear end 22.
The cross section area of the magnesium alloy telescopic body 2 is set to be round, so that the surface of the magnesium alloy telescopic body 2 is smooth, and the damage to the vertebral body is prevented; the vertical distance between the position with the largest cross-sectional area and the front end 21 is set smaller than the vertical distance between the position with the largest cross-sectional area and the rear end 22, so that the front part and the rear part of the expanded magnesium alloy telescopic body 2 are thick, and the function of supporting and resetting can be better achieved.
In the contracted state, the length of the magnesium alloy telescopic body 2 along the axial direction of the catheter 1 is 20-32mm.
In the maximum expansion state, the maximum height of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 is 12-22mm, and the maximum volume is 4.2-5.8ml.
The magnesium alloy telescopic body 2 can have different specifications according to the size of the vertebral body of the patient.
In this embodiment, in the contracted state, the length of the magnesium alloy telescopic body 2 along the axial direction of the catheter 1 is preferably 22mm.
In the maximum expanded state, the maximum height of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 is 15mm, and the maximum volume thereof is 4.5ml. The magnesium alloy telescopic body 2 with the specification is suitable for patients with smaller vertebral bodies.
In use, the magnesium alloy telescopic body 2 is not normally expanded to the maximum expanded state, and the maximum height of the magnesium alloy telescopic body 2 in the present embodiment in the radial direction of the catheter 1 after expansion is 13mm.
In addition, the magnesium alloy telescopic body 2 can be combined with the prior art to change alloy components and proportions, and is provided with surface coating and the like so as to be better applied to the vertebral body.
In surgery, one or more spinal supports, typically one to two, of the present invention may be placed in the spinal column to provide better support depending on the patient.
Example two
The structure of the spinal column support of this embodiment is substantially the same as that of the first embodiment, except that the length of the magnesium alloy telescopic body 2 in the axial direction of the catheter 1 is 27mm in the contracted state.
In the maximum expanded state, the maximum height of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 is 17mm, and the maximum volume thereof is 5.0ml. The magnesium alloy telescopic body 2 with the specification is suitable for patients with middle vertebral body size.
The maximum height of the magnesium alloy telescopic body 2 in the radial direction of the catheter 1 after expansion is 15mm.
Example III
The structure of the spinal column support of this embodiment is substantially the same as that of the first embodiment, except that the length of the magnesium alloy telescopic body 2 in the axial direction of the catheter 1 is 31mm in the contracted state.
In the maximum expanded state, the maximum height of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 is 17mm, and the maximum volume thereof is 5.5ml. The magnesium alloy telescopic body 2 with the specification is suitable for patients with larger vertebral bodies.
The maximum height of the magnesium alloy telescopic body 2 in the radial direction of the catheter 1 after expansion is 16mm.
In general, the magnesium alloy expansion body 2 of the first to third embodiments is the most commonly used.
Example IV
The structure of the spinal column support of this embodiment is substantially the same as that of the first embodiment, except that the length of the magnesium alloy telescopic body 2 along the axial direction of the catheter 1 is 20mm in the contracted state.
In the maximum expanded state, the maximum height of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 is 12mm, and the maximum volume thereof is 4.2ml. The magnesium alloy telescopic body 2 with the specification is suitable for patients with smaller vertebral bodies.
The maximum height of the magnesium alloy telescopic body 2 in the radial direction of the catheter 1 after expansion is 11mm.
Example five
The structure of the spinal column support of this embodiment is substantially the same as that of the first embodiment, except that the length of the magnesium alloy telescopic body 2 along the axial direction of the catheter 1 is 32mm in the contracted state.
In the maximum expanded state, the maximum height of the magnesium alloy telescopic body 2 along the radial direction of the catheter 1 is 22mm, and the maximum volume thereof is 5.8ml. The magnesium alloy telescopic body 2 with the specification is suitable for patients with larger vertebral bodies.
The maximum height of the magnesium alloy telescopic body 2 in the radial direction of the catheter 1 after expansion is 20mm.
Please refer to fig. 3-5. FIG. 3 is a schematic view of a preferred structure of the spinal bracket of the present invention extending into the spinal column. Fig. 4 is a schematic view of a preferred construction of the spinal bracket of the present invention in an expanded state of the magnesium alloy telescopic body. FIG. 5 is a schematic view of a magnesium alloy telescopic body in a vertebral body.
The application method of the spinal bracket comprises the following steps:
The catheter 1 is used for guiding the air bag and the magnesium alloy telescopic body 2 to enter the spinal column in a sagittal position, contrast agent is injected into the air bag through the catheter 1 to expand the air bag so as to transversely expand and longitudinally expand the magnesium alloy telescopic body 2 and put the magnesium alloy telescopic body in a proper position in the injured vertebra, so that the aim of resetting the compressed fracture vertebral body is fulfilled, after the vertebral body is reset, the air bag is emptied, the magnesium alloy telescopic body 2 maintains an expanded state, the air bag can be separated from the magnesium alloy telescopic body 2 and taken out, and the magnesium alloy telescopic body 2 is reserved in the vertebral body to facilitate injection of bone cement or bone materials.
The spinal bracket has the beneficial effects that:
(1) According to the spinal bracket, the catheter, the air bag and the magnesium alloy telescopic body are arranged, the air bag and the magnesium alloy telescopic body can be guided into the vertebral body by the catheter, and the air bag is inflated by injecting the contrast agent through the catheter, so that the magnesium alloy telescopic body is transversely expanded and longitudinally expanded, the compression fracture vertebral body is reset, after the vertebral body is reset, the magnesium alloy telescopic body can play a supporting role, the restoration state of the vertebral body is maintained, the magnesium alloy telescopic body can be reserved in the spinal column, bone cement or bone materials are conveniently injected, and the height of the vertebral body and the lobe degree after correction can be effectively maintained.
(2) The magnesium alloy telescopic body has enough structural strength, can prevent the propped vertebral body from re-collapsing, and has the effect of promoting bone formation in the degradation process.
(3) The cross section area of the front end is larger than that of the rear end in the expansion state, so that the device can better play a role in supporting and resetting according to the operation practice and the optimal form obtained by the human spine structure, and the postoperative recovery effect is better.
(4) The spinal bracket has the characteristics of simple structure, convenient use, good reduction supporting effect, capability of being placed in the body and the like.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.