CN108261272B - Artificial vertebral canal for preventing spinal nerve compression - Google Patents
Artificial vertebral canal for preventing spinal nerve compression Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B2017/7073—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant with intervertebral connecting element crossing an imaginary spinal median surface
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
- A61F2/30749—Fixation appliances for connecting prostheses to the body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The invention relates to an artificial vertebral canal for preventing spinal nerve compression, which comprises an artificial vertebral canal body, a transverse connector and a fixing device; the artificial vertebral canal body is connected with the fixing device through the transverse connector. The advantages are as follows: according to the artificial vertebral canal for preventing spinal nerve compression, the artificial vertebral canal suitable for different sections is designed according to the shape and the size of vertebral canal of different sections of a human spinal column, tumor tissues around the dura mater sac are later placed around the dura mater sac of the corresponding section after the operation of removing the spinal column, the artificial vertebral canal is finally fixed together with a fixing device by using a transverse connector to achieve stability, the supporting effect of the artificial vertebral canal can effectively prevent the compression of tumor recurrence, scar hyperplasia and the like on the dura mater sac and spinal nerve at 360 degrees, and the adhesion between the surrounding scar tissues and the dura mater sac and nerve roots can also be effectively avoided.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to an artificial vertebral canal for preventing spinal nerve compression.
Background
Because of the special anatomical part of the spine, the risk of spine tumor surgery is high, the difficulty is high, and especially the problems of malignant tumor and metastasis recurrence are always plagued for spine surgeons, and the occurrence rate of paraplegia is high due to spinal nerve pressure caused by tumor recurrence. The reason for this is that the anatomical structure, the spinal canal, that was originally used to protect the dura mater sac, was destroyed by the tumor or surgically removed.
The existing operation methods aiming at spinal tumors comprise total vertebroplasty and partial vertebroplasty, and for patients who cannot radically remove the total vertebroplasty and need timely decompression spinal cord, a learner tries to perform a separation operation, and the compression caused by tumor recurrence is blocked by a bone cement filling method between the rear of the vertebroplasty and the dura mater sac after the operation, but the problems of bone cement displacement and compression on the side and the rear of the dura mater sac still cannot be solved, and the compression of spinal nerves caused by bone cement can be bypassed after the tumor recurrence. At present, no effective method is available for solving the problem of spinal nerve compression caused by tumor recurrence.
Chinese patent document CN201510558076.0, filing date 2015092, patent name: disclosed is an artificial lamina and spinal canal expanding tool, the artificial lamina includes: the bone trabecular structure comprises an upper support, a lower support and a body positioned between the upper support and the lower support, wherein at least one part of the body is a bone trabecular structure body with multidirectional micropores for bone cells to grow in.
The artificial vertebral plate and the vertebral canal expanding tool disclosed in the patent document are provided with a bone trabecular structure body, the bone trabecular structure body is provided with a rough surface similar to a cancellous bone structure, the rough surface is combined with the upper and lower combined surfaces of the vertebral body embedded by the artificial vertebral plate in an embedded mode, an initial stabilizing function is provided for the implanted artificial vertebral plate to form a support for the vertebral body, an expanded vertebral canal space is maintained, bone cells and micro blood vessels grow into along micropores of the bone trabecular structure body along with the climbing of the human body in the rehabilitation process, and the bone trabecular structure body can finally form an active fusion embedded structure body, so that the artificial vertebral plate and the autologous vertebral plate of the vertebral body are integrated into a whole body, and are not permanently fixed by bone nails, and further firm long-term self-fixing can be realized. However, no corresponding disclosure exists regarding a technical solution capable of effectively solving the problem of spinal nerve compression caused by tumor recurrence.
In summary, there is a need for an artificial spinal canal which is placed in a first stage during surgery, surrounds the dura mater sac and is fixed on a bilateral nailing rod system, thereby playing a supporting and protecting role, preventing spinal nerves from being pressed even if tumors recur, avoiding paraplegia, improving the life quality of patients suffering from spinal tumors, and providing valuable time for further treatment.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the artificial vertebral canal which is placed in the first stage in the operation, surrounds the periphery of the dura mater sac and is fixed on the double-side nail rod system, plays a role in supporting and protecting, prevents spinal nerves from being pressed even if tumors recur, avoids paraplegia, improves the survival quality of patients with spinal tumors, and strives for precious time for further treatment.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an artificial vertebral canal for preventing spinal nerve compression comprises an artificial vertebral canal body, a transverse connector and a fixing device; the artificial vertebral canal body is connected with the fixing device through the transverse connector;
the artificial vertebral canal body comprises a micropore thin-wall layer and an elastic supporting layer; the microporous thin-wall layer is arranged on the outer layer, and the elastic supporting layer is arranged on the inner layer; the surface of the microporous thin-wall layer is covered with a microporous structure, and the elastic supporting layer is made of an elastic material;
the fixing device comprises a universal screw and a longitudinal connecting rod; the universal screw is provided with a connector, the connector is in the structure form of a counter bore, the counter bore is provided with a notch, and the inner wall of the counter bore is provided with internal threads; a longitudinal connecting rod is arranged in the notch in a penetrating way; a locking joint is arranged above the longitudinal connecting rod, and an external thread is arranged on the locking joint and is matched with an internal thread of the counter bore;
the transverse connector comprises a connecting plate, one end of the connecting plate is provided with a bulge, the bulge is provided with an arc-shaped cavity, and the arc-shaped cavity is matched with the connecting rod; the protrusion is also provided with a locking screw rod which is extruded on one side of the longitudinal connecting rod.
As an optimized technical scheme, the two longitudinal connecting rods are distributed on two sides of the artificial vertebral canal body, and at least two universal screws are arranged on each longitudinal connecting rod in a penetrating mode.
As a preferable technical scheme, the transverse connectors are distributed on two sides of the artificial vertebral canal body, one end of each transverse connector is fixed on the artificial vertebral canal body, and the other end of each transverse connector is connected to a longitudinal connecting rod of the fixing device.
As a preferable technical scheme, the vertebral canal cavity formed in the artificial vertebral canal body is circular, and the normal range of the sagittal diameter is 14-15mm.
As a preferable technical scheme, the vertebral canal cavity formed by the artificial vertebral canal body is triangular, and the normal range of the sagittal diameter is 12-21mm.
As a preferable technical scheme, the vertebral canal cavity formed in the artificial vertebral canal body is oval, the normal range of the sagittal diameter is 15-25mm, and the average diameter is 16-17mm.
As a preferable technical scheme, the vertebral canal cavity formed in the artificial vertebral canal body is triangular, and the normal range of the transverse diameter is 20-30mm, and the average diameter is 20-21mm.
As a preferable technical scheme, the vertebral canal cavity formed in the artificial vertebral canal body is circular, and the normal range of the sagittal diameter is 14-15mm.
The invention has the advantages that:
1. according to the spinal nerve compression artificial vertebral canal, the artificial vertebral canal suitable for different segments is designed according to the shapes and sizes of vertebral canals of different segments of a human spinal column, tumor tissues around the dura mater sac are placed around the dura mater sac of the corresponding segment in the later stage of the spinal column posterior operation excision, the spinal nerve compression artificial vertebral canal is finally fixed together with a fixing device by using a transverse connector to achieve stability, the supporting effect can effectively prevent compression of tumor recurrence, scar hyperplasia and the like on the dura mater sac and spinal nerve at 360 degrees, and adhesion between surrounding scar tissues, the dura mater sac and nerve roots can be avoided.
2. The artificial vertebral canal body is in the form of a thin layer structure, the thin layer structure can effectively save space, and enough space is reserved for the dura mater sac and spinal nerves as much as possible.
3. The micropore structure of the micropore thin-wall layer of the artificial vertebral canal body can effectively prevent tumor cells and microvessels from growing into the artificial vertebral canal to cause local compression, and simultaneously can meet the free access of water and electrolyte and ensure the nutrition support of the dural sac and nerve roots.
4. The elastic structure of the elastic supporting layer of the artificial vertebral canal body can be molded temporarily in the process of implantation, so that the artificial vertebral canal is convenient to implant, the harassment to the dura mater sac and spinal nerves is reduced as much as possible, and the effective mechanical supporting effect of the artificial vertebral canal body can be ensured.
5. The universal screws of the fixing device are arranged one by one, a fixing path is established among different universal screws, the operation is flexible, and the fixing path can be established according to the position of tumor tissues around the dura mater sac of the posterior spine surgical excision.
6. The longitudinal connecting rod of the fixing device has two functions, on one hand, the scattered universal screws are fixed together, namely, the point fixing mode is converted into the line fixing mode, and the fixing effect is definite; in another aspect, attachment points are provided for the transverse connectors to effect fixation of the artificial spinal body to the longitudinal connector rods.
7. Be equipped with transverse connector, transverse connector is used for linking together vertical connective bar and artifical vertebral canal body, can avoid artifical vertebral canal body lateral shifting.
Drawings
Fig. 1 is a schematic structural view of an artificial spinal canal for preventing spinal nerve compression according to the present invention.
Fig. 2 is a schematic view of an artificial spinal body.
Fig. 3 is a schematic structural view of the fixing device.
Fig. 4 is a schematic view of the structure of the transverse connector.
Fig. 5 is a schematic view of the artificial spinal body in an open interface state.
FIG. 6 is a schematic view of the structure of the artificial spinal canal of example 2.
Fig. 7 is a schematic view of the structure of the artificial spinal canal of example 3.
Fig. 8 is a schematic view of the structure of the artificial spinal canal of example 4.
FIG. 9 is a schematic view of the structure of the artificial spinal canal of example 5.
Detailed Description
The following detailed description of the invention provides specific embodiments with reference to the accompanying drawings.
Reference numerals and components referred to in the drawings are as follows:
1. artificial vertebral canal body 11 microporous thin wall layer
12. Elastic supporting layer 2. Fixing device
21. Universal screw 211 connector
212. Locking tab 22. Longitudinal connecting rod
3. Transverse connector 31. Connecting plate
32. Projection 33 arc cavity
34. Locking screw 4. Interface
Example 1
Referring to fig. 1, fig. 1 is a schematic structural view of an artificial spinal canal for preventing spinal nerve compression according to the present invention. An artificial vertebral canal for preventing spinal nerve compression comprises an artificial vertebral canal body 1, a transverse connector 3 and a fixing device 2; the artificial vertebral canal body 1 is connected with the fixing device 2 through the transverse connector 3.
Referring to fig. 2, fig. 2 is a schematic view of an artificial spinal canal body 1. The artificial vertebral canal body 1 comprises a micropore thin-wall layer 11 and an elastic supporting layer 12; the microporous thin-wall layer 11 is arranged on the outer layer, and the elastic supporting layer 12 is arranged on the inner layer; the surface of the microporous thin-wall layer 11 is covered with a microporous structure, and the elastic supporting layer 12 is made of an elastic material.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the fixing device 2. The fixing device 2 comprises a universal screw 21 and a longitudinal connecting rod 212; the universal screw 21 is provided with a connector 211, the connector 211 is in a structure form of a counter bore, the counter bore is provided with a notch, and the inner wall of the counter bore is provided with internal threads; a longitudinal connecting rod 212 is arranged in the notch in a penetrating way; a locking joint 212 is arranged above the longitudinal connecting rod 212, and an external thread is arranged on the locking joint 212 and is matched with an internal thread of the counter bore; the number of the longitudinal connecting rods 212 is two, the two longitudinal connecting rods are distributed on two sides of the artificial vertebral canal body 1, and at least two universal screws 21 are arranged on each longitudinal connecting rod 22 in a penetrating way.
Referring to fig. 4, fig. 4 is a schematic structural view of the transverse connector 3. The transverse connector 3 comprises a connecting plate 3, one end of the connecting plate 3 is provided with a protrusion 32, the protrusion 32 is provided with an arc-shaped cavity 33, and the arc-shaped cavity 33 is matched with the connecting rod; the protrusion 32 is also provided with a locking screw 34, and the locking screw 34 is extruded on one side of the longitudinal connecting rod; the transverse connectors 3 are distributed on two sides of the artificial vertebral canal body 1, one end of each transverse connector 3 is fixed on the artificial vertebral canal body 1, and the other end of each transverse connector 3 is connected to the longitudinal connecting rod 212 of the fixing device 2.
This example illustrates: in this embodiment, the vertebral canal cavity formed inside the artificial vertebral canal body 1 is circular, and the normal range of the sagittal diameter is 14-15mm. The artificial spinal canal body 1 in this embodiment is suitable for application on the thoracic spine segment in the spinal cord.
The artificial vertebral canal body 1 is in a thin layer structure, the thin layer structure can effectively save space, and enough space is reserved for the dural sac and spinal nerves as far as possible; the artificial vertebral canal body 1 comprises a micropore thin-wall layer 11 and an elastic supporting layer 12, wherein the micropore structure of the micropore thin-wall layer 11 can effectively prevent local compression caused by growth of tumor cells and micro blood vessels into the artificial vertebral canal, and simultaneously can meet the free access of water and electrolyte and ensure the nutrition support of dural sac and nerve roots; the elastic structure of the elastic supporting layer 12 can be temporarily plastic in the process of implantation, is convenient to implant, reduces harassment to the dura mater sac and spinal nerves as much as possible, and can ensure the effective mechanical supporting function.
The fixing device 2 comprises universal screws 21 and longitudinal connecting rods 212, the universal screws 21 are arranged one by one, fixing paths are established among different universal screws 21, the operation is flexible, and the fixing paths can be established according to the positions of tumor tissues around the dura mater sac of the spine posterior operation excision. The longitudinal connecting rod 212 has two functions, namely, on one hand, the zero universal screw 21 is fixed together, namely, the point fixing mode is converted into the line fixing mode, and the fixing effect is definite; on the other hand, the transverse connector 3 is provided with a connection point, thereby achieving the fixation of the artificial vertebral tube body 1 on the longitudinal connection rod 212.
The connector 211 of the universal screw 21 is in a counter bore structure, and an internal thread is arranged on the inner wall of the counter bore, and is convenient for matching with an external thread on the locking joint 212, so that the locking joint 212 can be fixed on the longitudinal connecting rod 212 in a spiral manner, and the longitudinal connecting rod 212 cannot move up and down.
The artificial vertebral canal is fixed on the longitudinal connecting rod 212 at two sides through the transverse connector 3, so that the artificial vertebral canal body 1 is fixed, the compression of tumors can be effectively resisted, the dural sac and the spinal cord are protected from being compressed by the tumors, and adverse effects caused by tumor recurrence can be effectively avoided.
The transverse connector 3 is used for connecting the longitudinal connecting rod 212 and the artificial vertebral canal body 1, so that the artificial vertebral canal body 1 can be prevented from moving transversely. The transverse connector 3 is provided with the arc-shaped cavity 33, the arc-shaped cavity 33 is used for being matched with the outer side face of the longitudinal connecting rod 212, meanwhile, the transverse connector 3 is provided with the locking screw 34, one side of the locking screw 34 is extruded on the longitudinal connecting rod 212, so that the transverse connector 3 and the longitudinal connecting rod 212 are locked, and when the locking screw 34 is pulled out, the locking can be released, and the adjustment is convenient.
The invention relates to an artificial vertebral canal for preventing spinal nerve compression, which comprises the following steps: in the first period of operation, firstly, two rows of universal screw 21 groups are driven into vertebrae in the resected area to establish a fixed path; two longitudinal connecting rods 212 are passed through the notches of the connecting joints, and the locking joints 212 are screwed into the connecting joints, so that the longitudinal connecting rods 212 are fixed; then, the artificial vertebral canal body 1 is placed between the two longitudinal connecting rods 212, and the arc-shaped cavity 33 of the transverse connector 3 is lapped on the longitudinal connecting rods 212, after the position is determined, the artificial vertebral canal body 1 is fixed by screwing in the locking screw 34, wherein the artificial vertebral canal body 1 is provided with an openable connector 4 (shown in fig. 5), can be placed from one side of the dura mater sac in an operation, passes around the abdomen side of the dura mater sac to the other side of the dura mater sac, and finally is connected and fixed at the rear side.
Example 2
Referring to fig. 6, fig. 4 is a schematic view of the structure of an artificial spinal canal according to embodiment 2. The present embodiment is basically the same as embodiment 1, except that the artificial vertebral canal body 1 in this embodiment forms a triangular vertebral canal cavity, and the normal range of the sagittal diameter is 12-21mm. The artificial vertebral canal body 1 in the embodiment is suitable for application to the cervical spine segment in the spinal cord.
Example 3
Referring to fig. 7, fig. 7 is a schematic view of the structure of an artificial spinal canal according to embodiment 3. The present embodiment is basically the same as embodiment 1, except that the vertebral canal cavity formed inside the artificial vertebral canal body 1 in this embodiment is oval, and the normal range of the sagittal diameter is 15-25mm, and the average diameter is 16-17mm. The artificial vertebral canal in this embodiment is suitable for the lumbar segment in the spinal cord and is applied at the L1-2 position of the lumbar spine.
Example 4
Referring to fig. 8, fig. 8 is a schematic view of the structure of an artificial spinal canal according to embodiment 4. The present embodiment is basically the same as embodiment 1, except that the inside of the artificial vertebral canal body 1 in this embodiment has a triangular vertebral canal cavity, and the normal range of the transverse diameter is 20-30mm, and the average diameter is 20-21mm. The artificial vertebral canal in this embodiment is suitable for the lumbar segment in the spinal cord and is applied at the L3-4 position of the lumbar spine.
Example 5
Referring to fig. 9, fig. 9 is a schematic view of the structure of an artificial spinal canal according to embodiment 5. This embodiment is substantially the same as embodiment 1, except that the vertebral canal cavity formed inside the artificial vertebral canal body 1 in this embodiment is in the form of a trilobal shape with a transverse diameter of < 16mm. The artificial vertebral canal in this embodiment is suitable for the lumbar segment in the spinal cord and is applied at the L5 position of the lumbar spine.
According to the spinal nerve compression artificial vertebral canal, the artificial vertebral canal suitable for different segments is designed according to the shapes and the sizes of vertebral canals of different segments of a human spinal column, tumor tissues around the dural sac are later placed around the dural sac of the corresponding segment after the posterior operation of the spinal column is cut, the spinal nerve compression artificial vertebral canal is finally fixed with the fixing device 2 together by the transverse connector 3 to achieve stability, the supporting effect of the spinal nerve compression artificial vertebral canal can effectively prevent the compression of tumor recurrence, scar hyperplasia and the like on the dural sac and the spinal nerve at 360 degrees, and the adhesion between the surrounding scar tissues and the dural sac and nerve roots can be avoided; the artificial vertebral canal body 1 is in the form of a thin layer structure, the thin layer structure can effectively save space, and enough space is reserved for the dural sac and spinal nerves as far as possible; the micropore structure of the micropore thin-wall layer 11 of the artificial vertebral canal body 1 can effectively prevent local compression caused by the growth of tumor cells and microvessels into the artificial vertebral canal, and simultaneously can meet the free access of water and electrolyte and ensure the nutrition support of the dural sac and nerve roots; the elastic structure of the elastic supporting layer 12 of the artificial vertebral canal body 1 can be temporarily plastic in the process of implantation, so that the implantation is convenient, the harassment to the dura mater sac and spinal nerves is reduced as much as possible, and the effective mechanical supporting effect of the artificial vertebral canal body 1 can be ensured; the universal screws 21 of the fixing device 2 are arranged one by one, a fixing path is established among different universal screws 21, the operation is flexible, and the fixing path can be established according to the position of tumor tissues around the dura mater sac of the posterior spine surgical excision; the longitudinal connecting rod 212 of the fixing device 2 has two functions, namely, on one hand, the zero universal screw 21 is fixed together, namely, the point fixing mode is converted into the line fixing mode, and the fixing effect is definite; on the other hand, the transverse connector 3 is provided with a connection point, so that the artificial vertebral tube body 1 is fixed on the longitudinal connection rod 212; the transverse connector 3 is arranged, and the transverse connector 3 is used for connecting the longitudinal connecting rod 212 with the artificial vertebral canal body 1, so that the artificial vertebral canal body 1 can be prevented from moving transversely.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and additions may be made to those skilled in the art without departing from the method of the present invention, which modifications and additions are also to be considered as within the scope of the present invention.
Claims (7)
1. An artificial vertebral canal for preventing spinal nerve compression is characterized by comprising an artificial vertebral canal body, a transverse connector and a fixing device; the artificial vertebral canal body is connected with the fixing device through the transverse connector;
the artificial vertebral canal body comprises a micropore thin-wall layer and an elastic supporting layer; the microporous thin-wall layer is arranged on the outer layer, and the elastic supporting layer is arranged on the inner layer; the surface of the microporous thin-wall layer is covered with a microporous structure, and the elastic supporting layer is made of an elastic material;
the fixing device comprises a universal screw and a longitudinal connecting rod; the universal screw is provided with a connector, the connector is in the structure form of a counter bore, the counter bore is provided with a notch, and the inner wall of the counter bore is provided with internal threads; a longitudinal connecting rod is arranged in the notch in a penetrating way; a locking joint is arranged above the longitudinal connecting rod, and an external thread is arranged on the locking joint and is matched with an internal thread of the counter bore;
the transverse connector comprises a connecting plate, one end of the connecting plate is provided with a bulge, the bulge is provided with an arc-shaped cavity, and the arc-shaped cavity is matched with the connecting rod; the bulge is also provided with a locking screw rod which is extruded on one side of the longitudinal connecting rod,
the artificial vertebral canal body is provided with an openable interface, can be placed from one side of the dura mater sac in operation, and finally is connected and fixed at the rear side after passing around the abdomen side of the dura mater sac to the other side of the dura mater sac.
2. The artificial spinal canal for preventing spinal nerve compression according to claim 1, wherein the number of the longitudinal connecting rods is two, the longitudinal connecting rods are distributed on two sides of the artificial spinal canal body, and at least two universal screws are arranged on each longitudinal connecting rod in a penetrating manner.
3. The artificial spinal canal for preventing spinal nerve compression according to claim 1, wherein the transverse connectors are distributed on both sides of the artificial spinal canal body, one end of each transverse connector is fixed on the artificial spinal canal body, and the other end of each transverse connector is connected to a longitudinal connecting rod of the fixing device.
4. The artificial spinal canal for preventing spinal nerve compression according to claim 1, wherein the spinal canal cavity formed inside the artificial spinal canal body is circular, and the normal range of the sagittal diameter is 14-15mm.
5. The artificial spinal canal for preventing spinal nerve compression according to claim 1, wherein the spinal canal cavity formed by the artificial spinal canal body is triangular, and the normal range of the sagittal diameter is 12-21mm.
6. The artificial spinal canal for preventing spinal nerve compression according to claim 1, wherein the spinal canal cavity formed inside the artificial spinal canal body is oval, and the normal range of sagittal diameter is 15-25mm, and average 16-17mm.
7. The artificial spinal canal for preventing spinal nerve compression according to claim 1, wherein the spinal canal cavity formed inside the artificial spinal canal body is triangular, and the normal range of transverse diameter is 20-30mm, and average 20-21mm.
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| CN201810077583.6A CN108261272B (en) | 2018-01-26 | 2018-01-26 | Artificial vertebral canal for preventing spinal nerve compression |
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| CN201810077583.6A CN108261272B (en) | 2018-01-26 | 2018-01-26 | Artificial vertebral canal for preventing spinal nerve compression |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108992216A (en) * | 2018-07-18 | 2018-12-14 | 中国医学科学院北京协和医院 | Artificial neural plate and internal fixation device of spine |
| CN111297459A (en) * | 2020-03-18 | 2020-06-19 | 北京爱康宜诚医疗器材有限公司 | Vertebral plate assembly |
| CN112164027B (en) * | 2020-09-01 | 2023-10-27 | 联影智能医疗科技(北京)有限公司 | Spinal dural sac compression detection method, equipment and storage medium |
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| CN108261272A (en) | 2018-07-10 |
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