CN116077160B - Spinal traction device - Google Patents
Spinal traction device Download PDFInfo
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- CN116077160B CN116077160B CN202310384319.8A CN202310384319A CN116077160B CN 116077160 B CN116077160 B CN 116077160B CN 202310384319 A CN202310384319 A CN 202310384319A CN 116077160 B CN116077160 B CN 116077160B
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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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7014—Longitudinal elements, e.g. rods with means for adjusting the distance between two screws or hooks
- A61B17/7016—Longitudinal elements, e.g. rods with means for adjusting the distance between two screws or hooks electric or electromagnetic means
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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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
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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
- A61B2017/00017—Electrical control of surgical instruments
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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
- A61B2017/00831—Material properties
- A61B2017/00876—Material properties magnetic
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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
- A61B2017/681—Alignment, compression, or distraction mechanisms
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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
Abstract
The present invention provides a spinal distraction device comprising: the fixing rod comprises a rod body and an inner tube arranged at the end part of the rod body, and the inner tube and the rod body are of an integrated structure; the cylinder body comprises a cylinder body and an outer tube arranged at the end part of the cylinder body, the outer tube and the cylinder body are of an integrated structure, the cylinder body is arranged at intervals with the rod body along the axis direction of the cylinder body, the outer tube is sleeved outside the inner tube, the inner tube is welded and connected on the cylinder body towards the end part of the cylinder body, and the outer tube is welded and connected on the rod body towards the end part of the rod body; a moving rod, a part of which is positioned in the cylinder body, the moving rod being arranged at intervals from the rod body in the extending direction of the rod body; the distance adjusting structure is arranged in the cylinder body and comprises a magnetic part, and the magnetic part drives the movable rod to be close to or far away from the fixed rod so as to adjust the distance. The technical scheme of the application effectively solves the problem that the operation is complex because the implantation rod needs to be manually prolonged in the related technology.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a spinal traction device.
Background
Scoliosis is a three-dimensional deformity of the spine for which treatment often relies on the medical device to provide sufficient measured bending force as a scaffold function to correct the bent spine back. Mild scoliosis can be treated by conservative treatment methods such as observation, support, plaster, gymnastics, etc., and serious spinal deformities require surgical treatment. The operation can correct the bent spine by pushing, rotating, expanding and pressing, cutting bones and other means, and the spine is fused and fixed by using the bone grafting fusion operation. However, in children whose skeletal development is not yet mature, the growth of the spine and the thorax is limited if a spinal fusion operation is performed prematurely.
The spinal distraction device of the related art is an implant rod, a first end of which is coupled to the patient's spinal column at a spaced apart relationship to a second end of the implant rod. The implanted rod pulls the spine to apply force to the spine and to reshape the spine. However, the implantation rod in the related art uses a manual extension mode, and when the implantation rod is manually extended, a general anesthesia operation is required to be performed on a patient, and the length of the implantation rod in the patient is directly adjusted from the outside of the patient. Multiple general anesthesia procedures are required during spinal orthoses, making the procedure complex, and the multiple procedures present significant surgical trauma and financial burden to the patient.
Disclosure of Invention
The main object of the present invention is to provide a spinal traction device, which solves the problem of complex operation caused by the need of manually extending an implanted rod in the related art.
In order to achieve the above object, the present invention provides a spinal traction device comprising: the fixing rod comprises a rod body and an inner tube arranged at the end part of the rod body, and the inner tube and the rod body are of an integrated structure; the cylinder body comprises a cylinder body and an outer tube arranged at the end part of the cylinder body, the outer tube and the cylinder body are of an integrated structure, the cylinder body is arranged at intervals with the rod body along the axis direction of the cylinder body, the outer tube is sleeved outside the inner tube, the inner tube is welded and connected on the cylinder body towards the end part of the cylinder body, and the outer tube is welded and connected on the rod body towards the end part of the rod body; a moving rod, a part of which is positioned in the cylinder body, the moving rod being arranged at intervals from the rod body in the extending direction of the rod body; the distance adjusting structure is arranged in the cylinder body and comprises a magnetic part, and the magnetic part drives the movable rod to be close to or far away from the fixed rod in the axial direction of the movable rod so as to adjust the distance.
Further, both ends of the inner tube protrude from both ends of the magnetic member in the axial direction thereof, respectively.
Further, the inner diameter of the cylinder body is smaller than the inner diameter of the outer tube so as to form a first step surface on the end surface of the cylinder body facing the outer tube, and the end part of the inner tube facing the cylinder body is welded and connected on the first step surface; the outer diameter of the part of the rod body, which is provided with the inner tube, is larger than that of the inner tube so as to form a second step surface on the end surface of the rod body, which faces the inner tube, and the end part of the outer tube, which faces the rod body, is welded and connected on the second step surface.
Further, the inner tube and the outer tube are interference fit or transition fit.
Further, the end of the inner tube facing the cylinder body is connected to the cylinder body by ultrasonic welding.
Further, a first strain sensing device is arranged on the outer side wall of the inner tube, and/or a second strain sensing device is arranged on the inner side wall of the outer tube.
Further, when the first strain sensing device is arranged on the outer side wall of the inner tube, the first strain sensing device comprises an induction coil and a strain sensor electrically connected with the induction coil, and the induction coil is arranged on the outer side wall of the inner tube in an etching mode.
Further, a guide structure is arranged between the moving rod and the cylinder body, the guide structure comprises a guide protrusion and a guide groove, one of the guide protrusion and the guide groove is arranged on the moving rod, and the other of the guide protrusion and the guide groove is arranged on the cylinder body.
Further, the distance adjusting structure further comprises a screw rod connected with the magnetic piece, and external threads are arranged on the screw rod; the part of the movable rod, which is positioned in the cylinder body, is a screw rod connecting cylinder sleeved outside the screw rod, and an inner thread matched with the outer thread is arranged on an inner hole of the screw rod connecting cylinder.
Further, the magnetic piece is rotatably connected with the inner tube through a bearing, the inner ring of the bearing is fixedly connected with the magnetic piece, and the outer ring of the bearing is fixedly connected with the inner tube.
By applying the technical scheme of the invention, the spine traction device comprises: fixed stick, barrel, removal stick and distance adjustment structure. The fixed rod comprises a rod body and an inner tube arranged at the end part of the rod body, wherein the inner tube and the rod body are of an integrated structure, so that the inner tube and the rod body are connected more reliably, and can bear larger acting force. The barrel comprises a barrel body and an outer tube arranged at the end part of the barrel body, wherein the outer tube and the barrel body are of an integrated structure, so that the outer tube and the barrel body are connected more reliably, and can bear larger acting force. The cylinder body is arranged at intervals with the rod body along the axis direction of the cylinder body, and the outer pipe is sleeved outside the inner pipe. The inner tube is welded and connected to the cylinder body towards the end of the cylinder body, and the outer tube is welded and connected to the rod body towards the end of the rod body. Like this, for directly welding fixed stick and barrel, inner tube and outer tube range upon range of setting and weld the junction that has increased fixed stick and barrel, the welding position of inner tube and barrel body and the welding position of outer tube and barrel stagger each other, have avoided the stacking of welded junction to avoid the emergence of stress concentration phenomenon, so that the welding of fixed stick and barrel is more reliable. And there is the barrel in the outside of the welding position of inner tube and section of thick bamboo body to owing to outer tube and section of thick bamboo body structure as an organic whole, the barrel that makes the outside that is located the welding position of inner tube and section of thick bamboo body can bear a portion bending stress, in order to reduce the bending stress that the welding position of inner tube and section of thick bamboo body received, improved the reliability of the welding position of inner tube and section of thick bamboo body. The inner side of the welding position of the outer tube and the rod body is provided with the fixing rod, and the inner tube and the rod body are of an integrated structure, so that the fixing rod positioned on the inner side of the welding position of the inner tube and the cylinder body can bear part of bending stress, the bending stress born by the welding position of the outer tube and the rod body is reduced, and the reliability of the welding position of the inner tube and the cylinder body is improved. The overall performance and the bending strength of the spinal traction device are improved, so that the spinal traction device can bear larger bending stress and bending load when the spinal traction device is used for spinal correction. A part of the moving rod is located in the cylinder body, and the moving rod is disposed at a distance from the rod body in the extending direction of the rod body. The distance adjusting structure is arranged in the cylinder body and comprises a magnetic piece. The magnetic member drives the moving rod to approach or separate from the fixed rod in the axial direction thereof to perform distance adjustment. The fixed rod and the movable rod are connected to the spine at intervals, the magnetic part is driven to rotate outside the patient body, the magnetic part rotates to drive the movable rod to approach or separate from the fixed rod, the length of the spine traction device is adjusted, so that the spine is subjected to traction, and the spine is corrected. Thus, the distance between the movable rod and the fixed rod can be adjusted by driving the magnetic piece to rotate outside the patient, and the problem that the implanted rod needs to be manually prolonged in the related art is avoided. Therefore, the technical scheme of the application effectively solves the problem that the operation is complex because the implantation rod is required to be manually prolonged in the related technology.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic perspective view of an embodiment of a spinal traction device according to the present invention;
FIG. 2 illustrates a schematic cross-sectional view of the spinal traction device of FIG. 1 from a first perspective;
FIG. 3 illustrates a schematic cross-sectional view of the spinal traction device of FIG. 1 from a second perspective;
fig. 4 shows a schematic cross-sectional view of the spinal traction device of fig. 1 from a third perspective.
Wherein the above figures include the following reference numerals:
10. a fixing rod; 11. a rod body; 111. a second step surface; 12. an inner tube;
20. a cylinder; 21. a cartridge body; 211. a first step surface; 22. an outer tube;
30. a moving rod;
40. a distance adjusting structure; 41. a magnetic member; 42. a screw rod; 43. a bearing;
50. a first strain sensing device;
60. a guide structure; 61. a guide protrusion; 62. a guide groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
As shown in fig. 1 to 4, the spinal traction device of the present embodiment includes: a fixed rod 10, a cylinder 20, a moving rod 30, and a distance adjusting structure 40. The fixing rod 10 comprises a rod body 11 and an inner tube 12 arranged at the end part of the rod body 11, wherein the inner tube 12 and the rod body 11 are of an integrated structure. The cylinder 20 includes a cylinder body 21 and an outer tube 22 provided at an end of the cylinder body 21, and the outer tube 22 and the cylinder body 21 are integrally formed. The tube body 21 is disposed at a distance from the rod 11 in the axial direction, and the outer tube 22 is sleeved outside the inner tube 12. The inner tube 12 is welded to the tube body 21 toward the end of the tube body 21, and the outer tube 22 is welded to the rod body 11 toward the end of the rod body 11. A part of the moving rod 30 is located in the cylinder body 21, and the moving rod 30 is disposed at a distance from the rod body 11 in the extending direction of the rod body 11. The distance adjusting structure 40 is provided in the cylinder 20, and the distance adjusting structure 40 includes a magnetic member 41. The magnetic member 41 drives the moving rod 30 to approach or separate from the fixed rod 10 in the axial direction thereof for distance adjustment.
By applying the technical scheme of the embodiment, the spine traction device comprises: a fixed rod 10, a cylinder 20, a moving rod 30, and a distance adjusting structure 40. The fixing rod 10 comprises a rod body 11 and an inner tube 12 arranged at the end part of the rod body 11, wherein the inner tube 12 and the rod body 11 are of an integrated structure, so that the inner tube 12 and the rod body 11 are connected more reliably and can bear larger acting force. The cylinder 20 comprises a cylinder body 21 and an outer tube 22 arranged at the end part of the cylinder body 21, wherein the outer tube 22 and the cylinder body 21 are of an integrated structure, so that the outer tube 22 is connected with the cylinder body 21 more reliably and can bear larger acting force. The tube body 21 is disposed at a distance from the rod 11 in the axial direction, and the outer tube 22 is sleeved outside the inner tube 12. The inner tube 12 is welded to the tube body 21 toward the end of the tube body 21, and the outer tube 22 is welded to the rod body 11 toward the end of the rod body 11. Thus, compared with the method that the fixing rod 10 and the cylinder 20 are directly welded, the method that the inner tube 12 and the outer tube 22 are stacked and welded increases the joint of the fixing rod 10 and the cylinder 20, the welding positions of the inner tube 12 and the cylinder body 21 and the welding positions of the outer tube 22 and the rod body 11 are staggered, and the stacking of welded junctions is avoided, so that the occurrence of stress concentration phenomenon is avoided, and the fixing rod 10 and the cylinder 20 are welded more reliably. In addition, the cylinder 20 is arranged outside the welding position of the inner tube 12 and the cylinder body 21, and the outer tube 22 and the cylinder body 21 are of an integrated structure, so that the cylinder 20 positioned outside the welding position of the inner tube 12 and the cylinder body 21 can bear part of bending stress, the bending stress born by the welding position of the inner tube 12 and the cylinder body 21 is reduced, and the reliability of the welding position of the inner tube 12 and the cylinder body 21 is improved. The fixing rod 10 is arranged at the inner side of the welding position of the outer tube 22 and the rod body 11, and the fixing rod 10 positioned at the inner side of the welding position of the inner tube 12 and the cylinder body 21 can bear part of bending stress due to the integral structure of the inner tube 12 and the rod body 11, so that the bending stress born by the welding position of the outer tube 22 and the rod body 11 is reduced, and the reliability of the welding position of the inner tube 12 and the cylinder body 21 is improved. The overall performance and the bending strength of the spinal traction device are improved, so that the spinal traction device can bear larger bending stress and bending load when the spinal traction device is used for spinal correction. A part of the moving rod 30 is located in the cylinder body 21, and the moving rod 30 is disposed at a distance from the rod body 11 in the extending direction of the rod body 11. The distance adjusting structure 40 is provided in the cylinder 20, and the distance adjusting structure 40 includes a magnetic member 41. The magnetic member 41 drives the moving rod 30 to approach or separate from the fixed rod 10 in the axial direction thereof for distance adjustment. The fixed rod 10 and the movable rod 30 are connected to the spine at intervals, the magnetic member 41 is driven to rotate outside the patient, the magnetic member 41 rotates to drive the movable rod 30 to approach or separate from the fixed rod 10, and the length of the spine traction device is adjusted so that the spine is subjected to traction, and the spine is corrected. Thus, driving the magnetic member 41 to rotate outside the patient's body enables the distance adjustment of the movable rod 30 and the fixed rod 10, avoiding the problem of the related art that the implanted rod needs to be manually extended. Therefore, the technical scheme of the embodiment effectively solves the problem of complex operation caused by the need of manually extending the implantation rod in the related art.
As shown in fig. 1 to 4, both ends of the inner tube 12 protrude from both ends of the magnetic member 41 in the axial direction thereof, respectively. In this way, the distance between the welding position of the inner tube 12 and the tube body 21 and the welding position of the outer tube 22 and the rod body 11 can be increased, stacking of the welding positions is avoided, the influence of a welded junction on the overall strength is avoided, and the mechanical property of the welding positions is increased, so that the spinal traction device can bear larger bending stress and bending load when performing spinal correction. And since the welding position avoids both ends of the magnetic member 41, the influence on the magnetic member 41 during the welding operation can be avoided.
As shown in fig. 1 to 4, the inner diameter of the tube body 21 is smaller than the inner diameter of the outer tube 22 to form a first stepped surface 211 on the end surface of the tube body 21 facing the outer tube 22, and the inner tube 12 is welded to the first stepped surface 211 toward the end of the tube body 21. The arrangement on the first step surface 211 is convenient for the welding of the inner tube 12 and the cylinder body 21, increases the welding area of the inner tube 12 and the cylinder body 21, ensures that the welding of the inner tube 12 and the cylinder body 21 is firmer and more reliable, ensures that the outer wall of the inner tube 12 welded with the cylinder body 21 can be flush, and further avoids the occurrence of the stress concentration phenomenon. The outer diameter of the portion of the rod body 11 where the inner tube 12 is provided is larger than the outer diameter of the inner tube 12 to form a second stepped surface 111 on the end surface of the rod body 11 facing the inner tube 12, and the outer tube 22 is welded to the second stepped surface 111 toward the end of the rod body 11. The setting of second step face 111 is convenient for the welding of the body 11 and outer tube 22, has increased the welding area of body 11 and outer tube 22 for the welding of body 11 and outer tube 22 is firm reliable more, and makes the outer wall after body 11 and outer tube 22 welding can the parallel and level, has further avoided the emergence of stress concentration phenomenon.
As shown in fig. 1-4, the inner tube 12 and the outer tube 22 are interference fit such that when the spinal traction device is subjected to bending stresses, the inner tube 12 and the outer tube 22 can be in abutting engagement to facilitate the transfer of forces between the inner tube 12 and the outer tube 22, so that the spinal traction device is more uniformly stressed and can withstand greater bending stresses.
In other embodiments, not shown, the inner tube 12 and the outer tube 22 are transition fitted.
As shown in fig. 1 to 4, the end of the inner tube 12 facing the tube body 21 is connected to the tube body 21 by ultrasonic welding. The use of ultrasonic welding allows the inner tube 12 and the barrel body 21 to be welded outside the spinal traction device with reliable weld quality and capable of withstanding large bending stresses.
As shown in fig. 1 to 4, a first strain-sensing device 50 is provided on the outer sidewall of the inner tube 12 to obtain the bending stress to which the inner tube 12 is subjected. The sensing signal sent by the first strain sensing device 50 is read by using an external device, and when the bending stress born by the inner tube 12 reaches the maximum set value of the bending stress of the inner tube 12, the driving of the magnetic member 41 is stopped. Furthermore, the first strain sensitive device 50 is provided on the outer side wall of the inner tube 12 for easier processing. The first strain sensing device 50 is disposed between the outer sidewall of the inner tube 12 and the inner sidewall of the outer tube 22, so as to avoid the influence of human tissue fluid and improve the stability and reliability of the first strain sensing device 50 during operation.
In an embodiment not shown, a second strain sensitive means is provided on the inner side wall of the outer tube.
As shown in fig. 1 to 4, when the first strain sensing device 50 is disposed on the outer sidewall of the inner tube 12, the first strain sensing device 50 includes an induction coil and a strain sensor electrically connected to the induction coil. Because both ends of the inner tube 12 protrude from both ends of the magnetic member 41 along the axial direction thereof, the induction coil disposed on the outer sidewall of the inner tube 12 can sense the rotation of the magnetic member 41, so that the magnetic field generated when the magnetic member 41 rotates can cut the induction coil, thereby generating current in the induction coil, enabling the induction coil to supply power to the strain sensor, and facilitating the operation of the strain sensor. The induction coil is disposed on the outer side wall of the inner tube 12 by etching, which facilitates miniaturization of the induction coil, and can further reduce the gap between the inner tube 12 and the outer tube 22, and optimize the internal layout of the spinal column orthopedic device.
In this embodiment, while the magnetic member 41 is rotated, an electric current is generated in the induction coil, and the strain sensor operates to transmit bending stress received by the inner tube 12 to an external device in real time in the form of the magnitude of the load force. Thus, the operator can read the bending stress of the inner tube 12 in real time, so that the operator can evaluate the bending stress of the spine traction device, and the spine orthopedic treatment plan can be adjusted in time. When the external equipment reads that the bending stress born by the spine traction device reaches 80% of the allowable limit bending stress of the spine traction device, the external equipment automatically cuts off the power supply, thereby protecting the spine traction device and a patient. Avoiding the situation that the bending stress born by the spine traction device exceeds the structural strength limit and the spine traction device is damaged and fails for the purpose of moving the moving rod 30 relative to the fixed rod 10 when the spine is corrected. The strain sensor is attached to the outer side wall of the inner tube 12, and the inner tube 12 is deformed by bending stress, so that the strain sensor is deformed, and the strain sensor changes the circuit resistivity due to deformation, so that the induced current passing through the strain sensor is changed. Because the bending stress born by the cylinder body is larger in the spinal column correction process, the strain sensor is arranged on the inner side wall of the cylinder body provided with the movable rod, and the bending stress born by the spinal column traction device can be sensed more accurately.
In an embodiment not shown, an induction coil is provided on the outer side wall of the inner tube, and a strain sensor is provided on the inner side wall of the barrel body provided with the moving rod.
As shown in fig. 1 to 4, a guide structure 60 is provided between the moving rod 30 and the cylinder 20 so that the moving rod 30 can move relative to the cylinder 20 in a guide direction of the guide structure 60. The guide structure 60 includes a guide protrusion 61 and a guide groove 62, the guide protrusion 61 being provided on the moving rod 30, and the guide groove 62 being provided on the cylinder 20. The guide grooves 62 and the guide protrusions 61 are engaged to enable the guide engagement of the moving rod 30 and the cylinder 20, and the relative rotation between the moving rod 30 and the cylinder 20 is prevented. The guide groove 62 and the guide projection 61 are simple and reliable in structure and convenient to process.
In an embodiment not shown, the guide groove is provided on the moving rod and the guide protrusion is provided on the cylinder.
As shown in fig. 1 to 4, the distance adjusting structure 40 further includes a screw 42 connected to the magnetic member 41, and external threads are provided on the screw 42. The part of the moving rod 30 located in the cylinder body 21 is a screw rod connecting cylinder sleeved outside the screw rod 42, and an inner hole of the screw rod connecting cylinder is provided with an inner thread matched with the outer thread. Thus, the magnetic member 41 rotates to drive the screw rod 42 to rotate, when the screw rod 42 rotates, the internal thread on the inner hole of the screw rod connecting cylinder is matched with the external thread on the screw rod 42, and under the guiding action of the guiding structure 60, the moving rod 30 can move relative to the cylinder body 20, so that the moving rod 30 moves relative to the fixed rod 10 to traction and orthopedic the spine.
As shown in fig. 1 to 4, the magnetic member 41 is rotatably connected to the inner tube 12 through a bearing 43, an inner ring of the bearing 43 is fixedly connected to the magnetic member 41, and an outer ring of the bearing 43 is fixedly connected to the inner tube 12. The arrangement of the bearings 43 can improve concentricity and stability of the magnetic member 41 when rotated, and make the structure of the spinal traction device simple, and improve the reliability of the spinal traction device. In the present embodiment, the bearing 43 is preferably a thrust bearing 43.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A spinal distraction device, comprising:
the fixing rod (10) comprises a rod body (11) and an inner tube (12) arranged at the end part of the rod body (11), wherein the inner tube (12) and the rod body (11) are of an integrated structure;
the cylinder body (20) comprises a cylinder body (21) and an outer tube (22) arranged at the end part of the cylinder body (21), wherein the outer tube (22) and the cylinder body (21) are of an integrated structure, the cylinder body (21) and the rod body (11) are arranged at intervals along the axis direction of the cylinder body, the outer tube (22) is sleeved outside the inner tube (12), the inner tube (12) is welded and connected onto the cylinder body (21) towards the end part of the cylinder body (21), and the outer tube (22) is welded and connected onto the rod body (11) towards the end part of the rod body (11);
a moving rod (30), a part of the moving rod (30) being located within the cylinder body (21), the moving rod (30) being disposed at a distance from the rod body (11) in the extending direction of the rod body (11);
and a distance adjusting structure (40) arranged in the cylinder body (20), wherein the distance adjusting structure (40) comprises a magnetic piece (41), and the magnetic piece (41) drives the movable rod (30) to be close to or far away from the fixed rod (10) in the axial direction of the movable rod so as to adjust the distance.
2. Spinal traction device according to claim 1, characterized in that the two ends of the inner tube (12) protrude from the two ends of the magnetic element (41) in the direction of its axis, respectively.
3. The spinal traction device of claim 1, wherein the device comprises a frame,
the inner diameter of the cylinder body (21) is smaller than the inner diameter of the outer tube (22) so as to form a first step surface (211) on the end surface of the cylinder body (21) facing the outer tube (22), and the inner tube (12) is welded and connected on the first step surface (211) towards the end part of the cylinder body (21);
the outer diameter of the part of the rod body (11) provided with the inner tube (12) is larger than the outer diameter of the inner tube (12) so as to form a second step surface (111) on the end surface of the rod body (11) facing the inner tube (12), and the outer tube (22) is welded and connected on the second step surface (111) towards the end part of the rod body (11).
4. The spinal traction device according to claim 1, wherein the inner tube (12) and the outer tube (22) are interference fit or transition fit.
5. Spinal traction device according to claim 1, characterized in that the end of the inner tube (12) facing the cylinder body (21) is connected to the cylinder body (21) by ultrasonic welding.
6. Spinal traction device according to claim 1, characterized in that the outer side wall of the inner tube (12) is provided with a first strain sensitive device (50) and/or the inner side wall of the outer tube (22) is provided with a second strain sensitive device.
7. The spinal distraction device according to claim 6, wherein when said first strain sensing device (50) is provided on the outer side wall of said inner tube (12), said first strain sensing device (50) comprises an induction coil and a strain sensor electrically connected to said induction coil, said induction coil being provided on the outer side wall of said inner tube (12) by means of etching.
8. The spinal traction device according to claim 1, characterized in that a guiding structure (60) is provided between the mobile rod (30) and the cylinder (20), the guiding structure (60) comprising a guiding protrusion (61) and a guiding groove (62), one of the guiding protrusion (61) and the guiding groove (62) being provided on the mobile rod (30), the other of the guiding protrusion (61) and the guiding groove (62) being provided on the cylinder (20).
9. The spinal traction device of claim 1, wherein the device comprises a frame,
the distance adjusting structure (40) further comprises a screw rod (42) connected with the magnetic piece (41), and external threads are arranged on the screw rod (42);
the part of the movable rod (30) positioned in the cylinder body (21) is a screw rod connecting cylinder sleeved on the outer side of the screw rod (42), and an inner hole of the screw rod connecting cylinder is provided with an inner thread matched with the outer thread.
10. The spinal traction device according to claim 9, characterized in that the magnetic member (41) is rotatably connected with the inner tube (12) by means of a bearing (43), an inner ring of the bearing (43) is fixedly connected with the magnetic member (41), and an outer ring of the bearing (43) is fixedly connected with the inner tube (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310384319.8A CN116077160B (en) | 2023-04-11 | 2023-04-11 | Spinal traction device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310384319.8A CN116077160B (en) | 2023-04-11 | 2023-04-11 | Spinal traction device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325504A (en) * | 2009-02-23 | 2012-01-18 | 埃利普斯科技有限公司 | Spinal traction system |
| CN208169975U (en) * | 2018-05-17 | 2018-11-30 | 江苏迪欧姆股份有限公司 | High-strength accurate welded still pipe |
| CN110714534A (en) * | 2019-10-22 | 2020-01-21 | 中国一冶集团有限公司 | Section steel concrete structure |
| CN216069481U (en) * | 2021-09-20 | 2022-03-18 | 广东富华重工制造有限公司 | Axle and axle assembly |
| CN218640626U (en) * | 2022-11-09 | 2023-03-17 | 湖南中联重科车桥有限公司 | Fist end welding type axle and engineering vehicle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11241257B2 (en) * | 2008-10-13 | 2022-02-08 | Nuvasive Specialized Orthopedics, Inc. | Spinal distraction system |
| US9044281B2 (en) * | 2012-10-18 | 2015-06-02 | Ellipse Technologies, Inc. | Intramedullary implants for replacing lost bone |
-
2023
- 2023-04-11 CN CN202310384319.8A patent/CN116077160B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325504A (en) * | 2009-02-23 | 2012-01-18 | 埃利普斯科技有限公司 | Spinal traction system |
| CN208169975U (en) * | 2018-05-17 | 2018-11-30 | 江苏迪欧姆股份有限公司 | High-strength accurate welded still pipe |
| CN110714534A (en) * | 2019-10-22 | 2020-01-21 | 中国一冶集团有限公司 | Section steel concrete structure |
| CN216069481U (en) * | 2021-09-20 | 2022-03-18 | 广东富华重工制造有限公司 | Axle and axle assembly |
| CN218640626U (en) * | 2022-11-09 | 2023-03-17 | 湖南中联重科车桥有限公司 | Fist end welding type axle and engineering vehicle |
Non-Patent Citations (1)
| Title |
|---|
| 十字形交叉对接焊缝对圆钢管拼接构件静力承载性能的影响;万先哲;赵宪忠;李明;;建筑结构(第S1期);843-846 * |
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