CN113143547A - Spine bending degree monitoring device, production method and application - Google Patents

Spine bending degree monitoring device, production method and application Download PDF

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Publication number
CN113143547A
CN113143547A CN202110271537.1A CN202110271537A CN113143547A CN 113143547 A CN113143547 A CN 113143547A CN 202110271537 A CN202110271537 A CN 202110271537A CN 113143547 A CN113143547 A CN 113143547A
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China
Prior art keywords
magnetic
spine
curvature
signal receiver
monitoring device
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Pending
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CN202110271537.1A
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Chinese (zh)
Inventor
苏彬
史云松
王琨
冯晓波
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Huazhong University of Science and Technology
Tongji Medical College of Huazhong University of Science and Technology
Union Hospital Tongji Medical College Huazhong University of Science and Technology
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Huazhong University of Science and Technology
Union Hospital Tongji Medical College Huazhong University of Science and Technology
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Priority to CN202110271537.1A priority Critical patent/CN113143547A/en
Publication of CN113143547A publication Critical patent/CN113143547A/en
Pending legal-status Critical Current

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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
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1071—Measuring physical dimensions, e.g. size of the entire body or parts thereof measuring angles, e.g. using goniometers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4566—Evaluating the spine
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4851—Prosthesis assessment or monitoring
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4644—Preparation of bone graft, bone plugs or bone dowels, e.g. grinding or milling bone material
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006—Properties of materials and coating materials
    • A61F2002/30079—Properties of materials and coating materials magnetic

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a spine bending degree monitoring device, a production method and application, wherein the spine bending degree monitoring device comprises magnetic bone nails arranged on vertebrae, the magnetic bone nails contain magnetic substances, two adjacent vertebrae are connected through intervertebral discs or intervertebral fusion devices, and the skin on the outer side of the vertebrae is provided with a signal receiver; when the magnetic bone nail is bent along with the spine of a human body, the relative displacement of the magnetic substance inside the magnetic bone nail relative to the coil receiver outside the skin is changed, so that induced current is monitored, a doctor can conveniently monitor the post-operation spine bending degree of a patient after an operation, and the problems of radiation, long time consumption, high cost and low accuracy due to the fact that X-ray and CT examination are mostly adopted in the existing method are solved. The spine bending degree monitoring device provided by the invention is simple in production method, low in cost, suitable for industrial large-scale production and wide in market prospect.

Description

Spine bending degree monitoring device, production method and application
Technical Field
The invention relates to the technical field of medical instruments, in particular to a spine bending degree monitoring device, a production method and application.
Background
With the development of technology, the proportion of spinal fusion in surgical implantation has also increased. The lumbar vertebra posterior interbody fusion is one of spinal fusion, and is generally suitable for patients with unstable lumbar degeneration caused by various reasons, patients with intervertebral disc protrusion or spinal stenosis needing posterior decompression, patients with intervertebral disc source lumbago, patients with limited anterior operation, patients with lumbar spondylolisthesis caused by various reasons, patients needing simultaneous decompression and reduction fixation of the spinal canal, and the like.
At present, after the fusion operation of the interbody fusion cage, in order to ensure the subsequent physical condition of the patient, the state of the interbody fusion cage in the patient is generally observed, and the imaging observation is generally carried out by using an X-ray and CT (computed tomography) technology, so as to judge the degree of curvature of the spine of the patient after the operation. However, the above technical solutions have the following disadvantages in practical use: the methods for judging the degree of curvature of the spine in the prior art mostly adopt X-ray and CT examination, and have the problems of radiation, long time consumption, high cost and low accuracy.
Disclosure of Invention
An embodiment of the present invention provides a device for monitoring a curvature of spine, so as to solve the problems of radiation, long time consumption, high cost and low accuracy of the existing methods for determining the curvature of spine, which are proposed in the above background technologies, due to the fact that X-ray and CT inspection are mostly adopted.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a spine curvature monitoring device comprises a magnetic bone nail arranged on a spine, wherein
The magnetic bone nail comprises a magnetic substance, and the mass percentage of the magnetic substance in the magnetic bone nail is 10% -70%;
two adjacent vertebrae are connected through intervertebral discs or intervertebral fusion devices;
the signal receiver is arranged on the skin (particularly back skin) outside the vertebra and used for changing the magnetic flux of the signal receiver when the magnetic bone nail is relatively displaced relative to the signal receiver so as to generate induced current for the signal receiver to monitor, and therefore the phenomenon that the bending degree of the vertebra of a patient is early warned through the change condition of the electric signal formed by the induced current can be achieved, and the intervertebral disc displacement and the intervertebral disc falling can be prevented.
As a further scheme of the invention: the mass percentage of the magnetic substance in the magnetic bone nail is 30-60%.
As a still further scheme of the invention: the magnetic block and the magnetic powder are made of one or more of but not limited to neodymium iron boron magnet and/or neodymium iron boron magnetic powder, neodymium nickel cobalt magnet and/or neodymium nickel cobalt magnetic powder, iron oxide magnet and/or iron oxide powder, chromium dioxide magnet and/or chromium dioxide magnetic powder, cobalt-iron oxide magnet and/or cobalt-iron oxide powder, metal magnet and/or metal magnetic powder.
Another object of an embodiment of the present invention is to provide a method for producing a device for monitoring curvature of spine, the method comprising the following steps: the method comprises the steps that a magnetic bone nail containing a magnetic substance is arranged on a vertebra, a signal receiver is arranged on skin (particularly back skin) on the outer side of the vertebra, and when the magnetic bone nail is relatively displaced relative to the signal receiver, induced current for monitoring the signal receiver is generated.
Another object of the embodiments of the present invention is to provide a device for monitoring the degree of curvature of spine, which is manufactured by the above method for manufacturing a device for monitoring the degree of curvature of spine.
Another object of an embodiment of the present invention is to provide an application of the above-mentioned device for monitoring the degree of curvature of the spine in real time and/or preventing the intervertebral disc from shifting and/or preventing the intervertebral disc from falling off.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a vertebra bending degree monitoring device, which comprises a magnetic bone nail arranged on vertebra, wherein the magnetic bone nail contains magnetic substances, two adjacent vertebra are connected through intervertebral discs, and a signal receiver is arranged on the skin outside the vertebra; when the magnetic bone nail is bent along with the spine of a human body, the relative displacement of the magnetic substance inside the magnetic bone nail relative to the coil receiver outside the skin is changed, so that the magnetic flux of the coil receiver is changed to generate induced current to be monitored, a doctor can conveniently monitor the post-operation spine bending degree of a patient after an operation and whether the interbody fusion cage implanted in the patient falls off, and the problems of radiation, long time consumption, high cost and low accuracy caused by the fact that X-ray and CT inspection are mostly adopted in the existing method for judging the spine bending degree are solved. The spine bending degree monitoring device provided by the invention is simple in production method and low in cost, is suitable for industrial large-scale production, meets the requirements of actual use, and has great application value.
Drawings
Fig. 1 is a schematic structural diagram of a device for monitoring the degree of curvature of spine according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a device for monitoring the degree of curvature of spine according to an embodiment of the present invention in a normal state.
Fig. 3 is a schematic structural view of a device for monitoring the degree of curvature of spine according to an embodiment of the present invention in a tilted-back state.
Fig. 4 is a schematic structural diagram of a device for monitoring the degree of curvature of spine in a forward tilting state according to an embodiment of the present invention.
In the figure: 1-the vertebra; 2-intervertebral disc; 3-skin; 4-a signal receiver; 5-magnetic bone nail.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention. In order to make the technical solution of the present invention clearer, process steps and device structures well known in the art are omitted here.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
as shown in fig. 1, a spinal curvature monitoring device includes a magnetic bone pin 5 provided on a vertebra 1, wherein
The magnetic bone nail 5 contains magnetic substances, and the mass percentage of the magnetic substances in the magnetic bone nail 5 is 10-70%;
two adjacent vertebras 1 are connected through an intervertebral disc 2 or an intervertebral fusion device;
the signal receiver 4 is arranged on the skin 3 (particularly back skin) outside the vertebra 1, and the signal receiver 4 is used for changing the magnetic flux of the signal receiver 4 when the magnetic bone nail 5 is relatively displaced relative to the signal receiver 4 so as to generate induced current for monitoring the signal receiver 4, so that the condition that the spine is bent can be early warned to a patient through the change of an electric signal formed by the induced current, and the displacement and the falling of the intervertebral disc can be prevented.
As another preferred embodiment of the present invention, the mass percentage of the magnetic substance in the magnetic bone nail 5 is 30% to 60%.
As another preferred embodiment of the present invention, the magnetic substance is provided at least one end of a magnetic bone nail 5 (which may be a commercially available bone nail at present), and preferably, by introducing the magnetic substance at the end of the bone nail inserted into the commercially available bone nail while placing a signal receiver 4 on the posterior skin 3 of the spine, when the magnetic bone nail 5 is bent along with the spine of the human body, the relative displacement of the magnetic substance inside thereof with respect to the signal receiver 4 outside the skin is changed, so that the induced current is monitored by the change of the magnetic flux of the signal receiver 4. Therefore, the invention also provides a method for monitoring the post-operation spinal curvature degree of a patient in real time through a non-CT technology and early warning the spinal curvature degree of the patient through an electric signal so as to prevent the intervertebral disc from shifting and falling off.
As another preferred embodiment of the invention, the intervertebral disc 2 is an intervertebral cage or a cartilaginous junction between vertebral bodies of two adjacent vertebrae of the human body.
As another preferred embodiment of the present invention, specifically, the magnetic bone nail 5 is a medical bone nail containing a magnetic substance, and the magnetic bone nail 5 and the signal receiver 4 are respectively located on the vertebra 1 of the human body and outside the skin 3 of the vertebra.
In the embodiment of the invention, due to the matching use of the magnetic bone nail 5 (specifically, a magnetic substance is introduced into the tail end of the bone nail of the current commercial bone nail) and the signal receiver 4 (specifically, a coil receiver is placed on the posterior skin of the vertebra), the signal receiver 4 monitors the change of induced current generated when the magnetic bone nail 5 relatively displaces with respect to the signal receiver 4 in real time, when the magnetic bone nail 5 bends along with the vertebra of a human body, the relative displacement of the magnetic substance inside the magnetic bone nail 5 with respect to the coil receiver outside the skin changes, so that the magnetic flux of the coil receiver changes, and the induced current is monitored. Can also be used for preventing intervertebral disc displacement and discectomy.
As another preferred embodiment of the present invention, the magnetic substance is a magnetic block or a mixed block of magnetic powder and polymer, wherein the polymer may be one or more of polydimethylsiloxane, polyurethane and rubber.
As another preferred embodiment of the present invention, the material used for the magnetic block and the magnetic powder includes, but is not limited to, one or more of neodymium iron boron magnet block and/or neodymium iron boron magnetic powder, neodymium iron nickel cobalt magnet block and/or neodymium iron nickel cobalt magnetic powder, iron oxide magnet block and/or iron oxide magnetic powder, chromium dioxide magnet block and/or chromium dioxide magnetic powder, cobalt-iron oxide magnet block and/or cobalt-iron oxide magnetic powder, metal magnet block and/or metal magnetic powder.
As another preferred embodiment of the present invention, when the magnetic substance is a mixed bulk of magnetic powder and polymer, the particle diameter of the magnetic powder is 0.01 to 500 μm.
As another preferred embodiment of the present invention, the signal receiver 4 (coil receiver) is a conductive coil, which may be one or more of a copper coil, a silver coil, a gold coil, a liquid metal coil, or a coil made by printing conductive polymer and/or metal nanoparticles on a fabric.
As another preferred embodiment of the invention, the diameter of the conductive coil is between 1 cm and 10 cm, and the number of coil turns is 1 to 500 turns.
Another object of an embodiment of the present invention is to provide a method for producing a device for monitoring curvature of spine, the method comprising the following steps:
a magnetic bone nail 5 containing magnetic substances is arranged on a vertebra 1, a signal receiver 4 is arranged on skin 3 (particularly back skin) outside the vertebra 1, and when the magnetic bone nail 5 is displaced relative to the signal receiver 4, induced current for monitoring the signal receiver 4 is generated.
As another preferred embodiment of the present invention, the magnetic bone nail 5 is prepared by fixing a magnetic substance to the end of a currently commercially available bone nail to form the magnetic bone nail 5, and the fixing method may be welding, additive manufacturing, glue bonding, or physical mortise and tenon structure connection, or may be a mixture of one or more of these methods.
As another preferred embodiment of the present invention, in the method for producing the device for monitoring the degree of curvature of spine, the method further comprises the step of introducing a protective layer on the outside of the magnetic bone nail 5, specifically, a polymer protective paint is disposed on the outside of the magnetic bone nail 5 by electroplating, physical deposition or painting, and an outer protective layer is introduced to block the reaction between the biological tissue and the intervertebral cage.
As another preferred embodiment of the present invention, the material of the polymer protective paint includes, but is not limited to, one or more of polyester, polyolefin, polyamide, and graft copolymer.
As another preferred embodiment of the present invention, both the fixing method for fixing the magnetic substance in the magnetic bone nail 5 and the method for protecting paint by electroplating, physical deposition or painting polymer can be adopted in the prior art, and the specific process conditions can be selected according to the needs, which are not described herein again.
The embodiment of the invention also provides a spine bending degree monitoring device prepared by the production method of the spine bending degree monitoring device.
The embodiment of the invention also provides application of the vertebral bending degree monitoring device in real-time monitoring of the vertebral bending degree and/or prevention of intervertebral disc displacement and/or prevention of intervertebral disc falling. Specifically, by adopting the spine bending degree monitoring device, two adjacent vertebrae 1 are connected through the intervertebral disc 2 or the intervertebral fusion cage, when the magnetic bone nail 5 is relatively displaced relative to the signal receiver 4, the magnetic flux of the signal receiver 4 is changed to generate induced current for monitoring the signal receiver 4, so that the spine bending degree of a patient can be early warned by the change condition of the electric signal formed by the induced current, and the displacement and the falling of the intervertebral disc can be prevented.
The technical effects of the spine curvature monitoring device according to the present invention will be further described below by referring to specific embodiments.
Example 1
A spine bending degree monitoring device comprises the following steps:
the magnetic neodymium iron boron block is fixed at the tail end of the current commercial bone nail through a glue adhesion technology, the exterior of the magnetic neodymium iron boron block is wrapped by medical polyurethane polymer, and the reaction between the magnetic neodymium iron boron block and biological tissues is blocked to form the magnetic bone nail 5.
A 300-turn coil receiver of conductive polyaniline having a diameter of 5 cm was placed on the skin opposite the vertebrae as the signal receiver 4.
After the fusion of the lumbar interbody fusion cage, the patient leans forward, the relative displacement of the permanent magnetic substance (magnetic neodymium iron boron block) at the tail end of the magnetic bone nail 5 relative to the coil outside the skin is changed, so that the magnetic flux passing through the coil is changed, and the induced voltage of 150 microvolts is monitored by the signal receiver 4. The patient leans back and an induced voltage of 223 microvolts is generated which is monitored by the signal receiver 4.
Example 2
A spine bending degree monitoring device comprises the following steps:
the magnetic ferrite block is fixed at the tail end of the current commercial bone nail by an additive manufacturing technology, the outer part of the magnetic ferrite block is wrapped by medical polyether ether ketone (PEEK) polymer, and the magnetic ferrite block is prevented from reacting with biological tissues to form the magnetic bone nail 5.
A copper coil receiver of 20 turns with a diameter of 1 cm was placed on the skin opposite the vertebrae as the signal receiver 4.
After the fusion of the lumbar interbody fusion cage, the patient leans forward, the relative displacement of the magnetic bone nail 5 end permanent magnetic substance (magnetic ferrite block) relative to the coil outside the skin changes, so that the magnetic flux passing through the coil changes, and the induced voltage of 125 microvolts is monitored by the signal receiver 4. The patient leans back and an induced voltage of 176 microvolts is generated which is monitored by the signal receiver 4.
Example 3
A spine bending degree monitoring device comprises the following steps:
the magnetic neodymium-nickel-cobalt powder with the mass percentage of 42% and the particle size of 120 mu m is fixed at the tail end of the current commercial bone nail through a physical wrapping technology, the exterior of the magnetic neodymium-nickel-cobalt powder is wrapped by medical polyimide polymer, and the magnetic bone nail 5 is formed by blocking the reaction with biological tissues.
A conductive silver coil receiver of 200 turns, 1 cm in diameter, was placed on the skin opposite the vertebrae as signal receiver 4.
After the fusion of the lumbar interbody fusion cage, the patient leans forward, the relative displacement of the permanent magnetic substance (block formed by magnetic neodymium nickel cobalt powder) at the end of the magnetic bone nail 5 relative to the coil outside the skin is changed, so that the magnetic flux passing through the coil is changed, and the induced voltage of 121 microvolts is generated and monitored by the signal receiver 4. The patient leans back and an induced voltage of 186 microvolts is generated which is monitored by the signal receiver 4.
Example 4
A spine bending degree monitoring device comprises the following steps:
the magnetic neodymium-nickel-cobalt powder with the mass percentage of 60% and the particle size of 200 mu m is fixed at the tail end of the current commercial bone nail by a physical wrapping technology, the exterior of the magnetic neodymium-nickel-cobalt powder is wrapped by medical polyimide polymer, and the magnetic bone nail 5 is formed by blocking the reaction with biological tissues.
A conductive silver coil receiver of 200 turns, 1 cm in diameter, was placed on the skin opposite the vertebrae as signal receiver 4.
Example 5
As shown in fig. 1, a spinal curvature monitoring device comprises a magnetic bone nail 5 arranged on a vertebra 1, wherein
The magnetic bone nail 5 contains magnetic substances, and the mass percentage of the magnetic substances in the magnetic bone nail 5 is 10%;
two adjacent vertebras 1 are connected through an intervertebral disc 2;
the signal receiver 4 is arranged on the skin 3 (particularly back skin) outside the vertebra 1, and the signal receiver 4 is used for changing the magnetic flux of the signal receiver 4 when the magnetic bone nail 5 is relatively displaced relative to the signal receiver 4 so as to generate induced current for monitoring the signal receiver 4, so that the condition that the spine is bent can be early warned to a patient through the change of an electric signal formed by the induced current, and the displacement and the falling of the intervertebral disc can be prevented.
Example 6
The spine bending degree monitoring device of embodiment 5 is used in the lumbar interbody fusion cage, and after the operation, the structural schematic diagram of the spine bending degree monitoring device when the human vertebral body is in a normal state is shown in fig. 2, the structural schematic diagram of the spine bending degree monitoring device when the human vertebral body is in a backward bending state is shown in fig. 3, and the structural schematic diagram of the spine bending degree monitoring device when the human vertebral body is in a forward bending state is shown in fig. 4. When the magnetic bone nail 5 deforms along with the bending of the human vertebra, the relative displacement of the permanent magnetic substance inside the magnetic bone nail relative to the coil outside the skin changes, the magnetic flux of the coil changes, induced current is generated and monitored, and the magnetic bone nail can be used for early warning the bending degree of the spine of a patient, so that the displacement and the falling of the intervertebral disc are prevented.
Example 7
The same as example 1 except that the magnetic neodymium iron boron block is replaced by the iron oxide magnetic block as compared with example 1.
Example 8
The same as example 1 except that the magnetic ndfeb block was replaced with the cobalt-iron oxide magnetic block, compared to example 1.
Example 9
The same as example 1 except that the magnetic ndfeb block was replaced with a neodymium nickel cobalt magnetic block, as compared with example 1.
Example 10
Compared with the embodiment 1, the method is the same as the embodiment 1 except that the magnetic neodymium iron boron block body is replaced by the chromium dioxide magnetic block.
Example 11
Compared with the embodiment 3, the method is the same as the embodiment 3 except that the neodymium iron boron magnetic powder with the mass percentage of 10% and the grain diameter of 0.01 mu m is fixed at the tail end of the current commercial bone nail by the glue bonding technology.
Example 12
Compared with the embodiment 3, the method is the same as the embodiment 3 except that the neodymium iron boron magnetic powder with the mass percentage of 20% and the grain diameter of 0.1 μm is fixed at the tail end of the current commercial bone nail by the glue bonding technology.
Example 13
Compared with the embodiment 3, the method is the same as the embodiment 3 except that 30 mass percent cobalt-iron oxide magnetic powder with the grain diameter of 1 μm is fixed at the end of the current commercial bone nail by the glue bonding technology.
Example 14
Compared with the embodiment 3, the method is the same as the embodiment 3 except that the chromium dioxide magnetic powder with the mass percentage of 40% and the grain diameter of 10 μm is fixed at the tail end of the current commercial bone nail by the glue bonding technology.
Example 15
The same as example 3, except that 50% by mass of metal magnetic powder having a particle size of 100 μm was fixed to the end of the current commercial bone screw by means of the technique of glue bonding, was used as example 3.
Example 16
The same as example 3, except that 60% by mass of cobalt-iron oxide magnetic powder having a particle size of 200 μm was fixed to the end of the current commercial bone screw by rubber, was used.
Example 17
The same as example 3 was conducted except that the magnetic powder of chromium dioxide having a particle size of 300 μm and a mass percentage of 65% was fixed to the end of a currently commercially available bone screw by polyurethane as in example 3.
Example 18
The same as example 3 was conducted except that 70 mass% of metal magnetic powder having a particle size of 500 μm was fixed to the end of the currently commercially available bone screw by means of polydimethylsiloxane, as compared with example 3.
Example 19
The same as example 1, except that a 1 cm diameter, 1 turn silver coil receptor was placed on the skin opposite the vertebrae as compared to example 1.
Example 20
The procedure was as in example 1 except that a 7 cm diameter, 10 turn gold wire loop receiver was placed on the skin opposite the vertebrae as compared to example 1.
Example 21
The same as example 1, except that 500 turns of conductive polymer and/or metal nanoparticles having a diameter of 10 cm were printed on the fabric to form a coil receptor, which was placed on the skin opposite to the vertebrae, was used as example 1.
Example 22
The same as example 3 except that the medical polyimide polymer was replaced with the medical polyester polymer, as compared with example 3.
Example 23
The same as example 3 except that the medical polyimide polymer was replaced with the medical graft copolymer, as compared with example 3.
Example 24
The same as example 3 except that the medical polyimide polymer was replaced with the medical polyolefin polymer, as compared with example 3.
The spine bending degree monitoring device provided by the invention can be used for early warning the bending degree of the spine of a patient through an electric signal, preventing the intervertebral disc from shifting and falling off and realizing the real-time monitoring of the relative displacement of the intervertebral fusion cage by the non-CT technology for the first time. Currently, in order to observe the state of the interbody fusion cage in the patient, CT technology is generally used for shooting observation. However, the CT technique is expensive, time-consuming and requires a long waiting time, and the method of installing the sensor in vitro to monitor the physical morphology of the vertebra is to attach the sensor to the external skin, which cannot accurately reflect the situation that the intervertebral disc bends along the spine of the human body. The invention has the advantages of light structure, simple operation, real-time monitoring, short time consumption and lower cost, is convenient for doctors to monitor the spine bending degree of patients after operation, and can early warn the spine bending degree of the patients through electric signals so as to prevent intervertebral disc displacement and intervertebral disc falling, thereby having wide market prospect.
In summary, compared with the prior art, the invention has the beneficial effects that:
1. the device for monitoring the bending degree of the spine provided by the invention realizes real-time monitoring of the relative displacement of the interbody fusion cage by the non-CT technology for the first time. The method is light, simple and low in cost, facilitates the monitoring of the spine bending degree of the patient after the operation by a doctor and the judgment of whether the intervertebral fusion cage implanted into the patient falls off, and is a method for early warning the spine bending degree of the patient through electric signals so as to prevent the displacement and the falling off of the spine bending degree monitoring device.
2. The invention realizes the aim of monitoring the position of the interbody fusion cage in real time by utilizing an electromagnetic induction mechanism, and is beneficial to further development towards the directions of convenience, intellectualization and the like.
3. The production method of the spine bending degree monitoring device provided by the invention has the advantages of simple equipment, easiness in operation, low energy consumption and low cost in the production process, and is suitable for industrial large-scale production; and the product prepared by the method is easy to install by doctors in operation, meets the requirement of actual use, and has great application value.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The standard parts used by the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part can adopt the conventional means of mature bolts, rivets, welding and the like in the prior art, and the detailed description is not repeated.
The above detailed description of the preferred embodiments of the present invention, but the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.

Claims (10)

1. A spinal curvature monitoring device comprising a magnetic bone pin disposed on a vertebra, wherein
The magnetic bone nail comprises a magnetic substance, and the mass percentage of the magnetic substance in the magnetic bone nail is 10% -70%;
two adjacent vertebrae are connected through intervertebral discs or intervertebral fusion devices;
and a signal receiver is arranged on the skin outside the vertebra and used for changing the magnetic flux when the magnetic bone nail is relatively displaced relative to the signal receiver so as to generate induced current for the signal receiver to monitor.
2. The spine curvature monitoring device according to claim 1, wherein the magnetic substance is included in the magnetic bone pins at a mass percentage of 30-60%.
3. The spine curvature monitoring device of claim 1, wherein the intervertebral disc is a cartilaginous junction between vertebral bodies of two adjacent vertebrae of a human body, and the intersomatic cage is an artificially implanted intersomatic cage.
4. The device for monitoring the degree of curvature of spine according to claim 1, wherein the magnetic substance is a magnetic block or a mixed block of magnetic powder and polymer, wherein the polymer is one or more of polydimethylsiloxane, polyurethane and rubber.
5. The spinal curvature monitoring device of claim 1, wherein the signal receiver is a conductive coil, and wherein the conductive coil has a diameter of between 1 cm and 10 cm.
6. A method of producing a device for monitoring the degree of curvature of the spine according to any of claims 1 to 5, comprising the steps of: the method comprises the steps of arranging a magnetic bone nail containing a magnetic substance on a vertebra, arranging a signal receiver on the skin outside the vertebra, and generating induction current for monitoring the signal receiver when the magnetic bone nail is relatively displaced relative to the signal receiver.
7. The method for producing a device for monitoring the degree of curvature of spine according to claim 6, further comprising the step of introducing a protective layer on the exterior of the magnetic bone pins, specifically, a polymer protective paint is disposed on the exterior of the magnetic bone pins by electroplating, physical deposition or painting.
8. A method for producing a device for monitoring the curvature of the spine according to claim 7, wherein the polymeric protective paint is one or more of polyester, polyolefin, polyamide and graft copolymer.
9. A vertebral curvature monitoring device manufactured by the method of manufacturing a vertebral curvature monitoring device according to any of claims 6 to 8.
10. Use of a spinal curvature monitoring device according to claim 1 or 2 or 3 or 4 or 5 or 9 for real-time monitoring of spinal curvature and/or prevention of disc displacement and/or prevention of disc loss.
CN202110271537.1A 2021-03-12 2021-03-12 Spine bending degree monitoring device, production method and application Pending CN113143547A (en)

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