CN112043466B - Transpedicular interbody fusion system - Google Patents
Transpedicular interbody fusion system Download PDFInfo
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- CN112043466B CN112043466B CN202011010446.4A CN202011010446A CN112043466B CN 112043466 B CN112043466 B CN 112043466B CN 202011010446 A CN202011010446 A CN 202011010446A CN 112043466 B CN112043466 B CN 112043466B
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- 230000004927 fusion Effects 0.000 title claims abstract description 30
- 238000002513 implantation Methods 0.000 claims abstract description 36
- 210000005077 saccule Anatomy 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000007943 implant Substances 0.000 claims description 32
- 210000003128 head Anatomy 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 210000000988 bone and bone Anatomy 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 5
- 210000001519 tissue Anatomy 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 3
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims 1
- 239000005020 polyethylene terephthalate Substances 0.000 claims 1
- 208000020307 Spinal disease Diseases 0.000 abstract description 6
- 201000010099 disease Diseases 0.000 abstract description 6
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 6
- 208000014674 injury Diseases 0.000 abstract description 3
- 230000008733 trauma Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000002639 bone cement Substances 0.000 description 7
- 206010010214 Compression fracture Diseases 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002872 contrast media Substances 0.000 description 3
- 208000015122 neurodegenerative disease Diseases 0.000 description 3
- 239000012943 hotmelt Substances 0.000 description 2
- 210000004446 longitudinal ligament Anatomy 0.000 description 2
- 230000001009 osteoporotic effect Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 206010052428 Wound Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 210000001951 dura mater Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Transplantation (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a transpedicular interbody fusion system, which comprises an open cavity assembly, an implantation saccule assembly, a conveying inner tube assembly and an outer tube assembly; the transpedicular interbody fusion system provided by the invention completes the formation of the upper and lower vertebral bodies through one puncture, provides support for the maintenance of the height of the intervertebral space between the upper and lower vertebral bodies, solves the problems existing in the prior art, and has the advantages that the trauma to patients suffering from two diseases, especially patients suffering from multiple vertebral lesions in the treatment process is small, the overall treatment time is shortened, and the operation cost is reduced; when the transpedicular interbody fusion system is used for opening a cavity, only physiological tissues in an intervertebral space are pushed away, and most physiological structures among vertebral bodies are reserved.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a transpedicular interbody fusion system.
Background
The osteoporosis vertebral compression fracture is a common disease which is harmful to the health of middle-aged and elderly people, and for the vertebral compression fracture, the current operation treatment methods include Percutaneous Vertebroplasty (PVP) and implantation balloon expansion vertebroplasty (PKP).
Implantation balloon-expanded kyphoplasty (PKP) utilizes percutaneous puncture to place an expandable implant balloon into the collapsed vertebral body, lifting the endplates by expansion of the implant balloon, restoring the height of the vertebral body, correcting kyphoplasty deformity, and forming a cavity in the vertebral body, and filling high viscosity bone cement at a lower pressure. In order to make the implantation saccule smoothly enter the vertebral body, a working channel is established by using a puncture needle and a working sleeve, then the working channel before the implantation saccule is expanded is drilled by using a bone drill, then the implantation saccule is sent into the vertebral body, a cavity is formed in the vertebral body, then the implantation saccule is withdrawn, and finally bone cement is injected. Aiming at patients with multi-section vertebral lesions, two-side puncture injection of bone cement is needed to be carried out on each section of vertebral in the operation, the operation process is complicated, the trauma to the patients is large, the occurrence probability of complications is high, and the economic burden of the patients is increased. In addition, the operation is required to be operated under the monitoring of X-rays, and the longer the operation process is, the more the health damage to doctors is, and the higher the physical requirement is.
In addition, patients with multiple vertebral lesions often have spine degenerative diseases and damaged structures, and the existing Percutaneous Vertebroplasty (PVP) and implanted saccule-expanded vertebroplasty (PKP) only can play a role in single-segment vertebroplasty reinforcement, and have no practical effect on restoring the stress and stability of the anterior column and the middle column, restoring and maintaining the inherent physiological bulge of the spine, expanding the intervertebral space and relieving the compression problem of the dura mater sac and the nerve root.
At present, patients usually need to use an intervertebral fusion device for treatment, and the principle of the intervertebral fusion device is that after the intervertebral fusion device is implanted, the expansion force enables muscles, fiber rings, anterior and posterior longitudinal ligaments of a fusion segment to be in a continuous tension state, so that the fusion segment and the fusion device are fixed in a three-dimensional hyperstatic manner. The vertebral fusion device usually needs to scrape the fibrous tissue of the target intervertebral space before being implanted into the vertebral fusion device, destroys the physiological structure of human body, and in order to achieve good supporting effect, the supporting surface needs to be as large as possible during design, thereby leading to implantation channel to be also larger, causing great damage to patients, having longer time for achieving fusion effect after operation, and being difficult to achieve satisfactory fusion effect for old people with poor bone quality.
Osteoporotic vertebral compression fracture and degenerative diseases of the spine and structural damage thereof are common diseases which are harmful to the health of middle-aged and elderly people at present. At present, no product which can simultaneously solve the two middle-aged and elderly multiple diseases exists at home and abroad. For the elderly suffering from two diseases, especially the patients suffering from multiple vertebral lesions, the patients usually need to undergo multiple operations of different types, the wounds are large, the whole treatment period is long, and the operation cost is high.
Therefore, there is a need for a transpedicular interbody fusion system that can not only simultaneously address the two conditions of osteoporotic vertebral compression fracture and degenerative diseases of the spine and structural damage thereof, but also reduce the number of operations in the whole treatment process of the patient, shorten the operation time, and retain the physiological structures of the human body in the intervertebral space to a greater extent for patients with multiple vertebral lesions.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art and provides a transpedicular interbody fusion system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention provides a transpedicular interbody fusion system, which comprises an open cavity assembly, an implantation saccule assembly, a conveying inner tube assembly and an outer tube assembly;
the cavity opening assembly comprises a puncture needle tube assembly and a soft drill assembly; the puncture needle tube assembly comprises a connecting port and a needle tube; the soft drill assembly comprises a flexible shaft and a drill bit; the puncture needle tube assembly is connected with the head end of the soft drill assembly through a connecting port;
the implantation balloon assembly comprises an implantation balloon, an implantation balloon handle and a guide wire; the implantation saccule is dumbbell-shaped, and a sealing head with a closed distal end is fixedly arranged at the distal end of the implantation saccule; the proximal end of the sealing head is provided with a blind hole with an opening facing the inside of the implantation saccule; the implantation sacculus handle is connected with the proximal end of the implantation sacculus;
the conveying inner pipe assembly comprises a conveying inner pipe, a sliding block guide rail, an inner pipe knob, an inner pipe sliding block and a conveying port; the conveying inner pipe is fixedly connected with the inner pipe sliding block; the inner tube sliding block is in threaded connection with the inner tube knob, and the conveying inner tube can be controlled to axially stretch and retract by rotating the inner tube knob;
the outer tube assembly comprises an outer tube, an outer tube sliding block and an outer tube knob; the outer tube is fixedly connected with the outer tube sliding block; the outer tube sliding block is in threaded connection with the outer tube knob, and the outer tube can be controlled to axially stretch out and draw back by rotating the outer tube knob;
wherein the distal end of the guide wire bending section passes through the interior of the implantation balloon and is inserted into the blind hole; the inner diameter of the outer tube is slightly larger than the outer diameter of the inner conveying tube, the inner conveying tube is a rigid tube, and the distal end of the inner conveying tube is connected with the implantation saccule and can be inserted into the outer tube in a sliding manner; the distal end of the inner delivery tube or the distal end of the outer tube is deformed such that a line or surface contact is formed when the distal ends of the inner and outer delivery tubes are assembled coaxially, thereby securing the proximal end of the implant balloon between the inner and outer delivery tubes.
Preferably, the connecting port is provided with threads, and the puncture needle tube assembly is in threaded connection with the head end of the soft drill assembly through the connecting port.
Preferably, the flexible shaft is made of shape memory alloy, and the bending angle is 80-100 degrees; the drill bit is in a pointed head, a round head or a triangular pyramid shape and has rigidity for bearing the thrust of a tissue cavity without denaturation.
Further preferably, the shape memory alloy is a nickel titanium alloy.
Preferably, the implantation saccule is made of medical polymer materials, and micropores are arranged at the upper end and the lower end of the dumbbell-shaped implantation saccule.
Further preferably, the implantation balloon is PTFE film sintered and shaped or PET wire woven.
Preferably, the conveying inner pipe is glued with the inner pipe sliding block, hot melted or integrally injection molded; the outer tube is glued, hot-melted or integrally injection-molded with the outer tube slide block.
Preferably, the delivery port is a standard luer fitting for connecting to a bone filler injection device.
Preferably, the deformation treatment of the distal end of the inner conveying pipe or the distal end of the outer conveying pipe is flaring of the inner conveying pipe or necking of the outer conveying pipe.
Preferably, the method further comprises: a hold-down bar assembly; the press bar assembly comprises a press bar and a press bar handle.
Compared with the prior art, the invention has the following technical effects:
the transpedicular interbody fusion system provided by the invention completes the formation of the upper and lower vertebral bodies through one puncture, provides support for the maintenance of the height of the intervertebral space between the upper and lower vertebral bodies, solves the problems existing in the prior art, and has the advantages that the trauma to patients suffering from two diseases, especially patients suffering from multiple vertebral lesions in the treatment process is small, the overall treatment time is shortened, and the operation cost is reduced; when the transpedicular interbody fusion system is used for opening a cavity, only physiological tissues in the intervertebral space are pushed away, and most physiological structures among vertebral bodies are reserved; the invention designs that the fixed bent angle part of the outer tube distal end is preloaded in the adjusting tube, so that the instrument passes through the working channel straightly, an operator does not need to expend effort to put the instrument into the working channel, and the release and recovery of the fixed bent angle part of the outer tube distal end are realized by operating the handle of the adjusting tube.
Drawings
FIG. 1a is a schematic diagram showing an assembly structure of an open cavity assembly according to embodiment 1 of the present invention;
FIG. 1b is a schematic sectional view showing the assembly of the cavity opening assembly according to embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a puncture needle tube assembly according to embodiment 1 of the present invention;
FIG. 3a is a schematic view showing an assembly structure of an implanted balloon assembly according to embodiment 1 of the present invention;
FIG. 3b is a schematic cross-sectional view of the head end of the implant balloon assembly according to embodiment 1 of the present invention;
FIG. 3c is a schematic view of the structure of an implant balloon according to embodiment 1 of the present invention;
FIG. 4a is a schematic view showing the assembly structure of the inner conveying pipe assembly according to embodiment 1 of the present invention;
FIG. 4b is a schematic cross-sectional view of the inner tube assembly of embodiment 1 of the present invention;
FIG. 5 is a schematic view showing an assembly structure of an outer tube assembly according to embodiment 1 of the present invention;
FIG. 6 is a schematic view of a partially assembled structure of embodiment 1 of the present invention;
FIG. 7a is a schematic view showing a fixation mode of an implanted balloon according to embodiment 1 of the present invention;
FIG. 7b is a schematic view showing another fixation mode of the implanted balloon according to embodiment 1 of the present invention;
FIG. 8a is a sagittal view of a schematic used in the first stage of example 2 or example 3 of the present invention;
FIG. 8b is a schematic cross-section of the second stage use of example 2 or example 3 of the present invention;
FIG. 9a is a third stage of use of embodiment 3 of the present invention;
FIG. 9b is a third stage of use of embodiment 3 of the present invention;
FIG. 10a is a schematic diagram of the third stage of embodiment 2 or the fourth stage of embodiment 3 of the present invention;
FIG. 10b is a schematic diagram of the fourth stage of embodiment 2 or the fifth stage of embodiment 3;
FIG. 10c is a schematic diagram of the fourth stage of embodiment 2 or the fifth stage of embodiment 3;
FIG. 10d is a schematic diagram of the fifth stage of embodiment 2 or the sixth stage of embodiment 3;
FIG. 10e is a schematic diagram of the sixth stage of embodiment 2 or the seventh stage of embodiment 3;
FIG. 10f is a schematic diagram of the sixth stage of embodiment 2 or the eighth stage of embodiment 3;
FIG. 10g is a schematic diagram of the seventh stage of embodiment 2 or the ninth stage of embodiment 3 of the present invention;
wherein the reference numerals are as follows:
a needle cannula assembly 10; a connection port 101; a needle tube 102; a soft drill assembly 20; a flexible shaft 201; a drill 202; implanting a balloon assembly 30; implanting a balloon 301; implanting a balloon handle 302; a guidewire 303; a head 304; a blind hole 305; a delivery inner tube assembly 40; a delivery inner tube 401; a slider rail 402; an inner tube knob 403; an inner tube slider 404; a delivery port 405; an outer tube assembly 50; an outer tube 501; an outer tube slider 502; an outer tube knob 503; pedicle 601; an upper vertebral body 602; the intervertebral space 603; the inferior vertebral body 604; expanding the implant balloon 701; a contrast agent injection port 702; expanding the implanted balloon pressure pump connection port 703; pressing a bar 801; press bar handle 802.
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. 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 should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
Example 1
As shown in fig. 1-7, the present embodiment provides a transpedicular interbody fusion system including an open cavity assembly, an implant balloon assembly 30, a delivery inner tube assembly 40, an outer tube assembly 50, and a tamp assembly;
the open cavity assembly includes a piercing needle cannula assembly 10 and a soft drill assembly 20; the penetrating needle cannula assembly 10 includes a connection port 101 and a needle cannula 102; the soft drill assembly 20 includes a flexible shaft 201 and a drill bit 202; the connecting port 101 is provided with threads, and the puncture needle tube assembly 10 is in threaded connection with the head end of the soft drill assembly 20 through the connecting port 101; the flexible shaft 201 is made of shape memory alloy (preferably nickel titanium alloy) with a bending angle of 80-100 degrees; the drill 202 is in the shape of a pointed tip, a round head or a triangular pyramid, and has rigidity for bearing the thrust of a tissue cavity opening without deformation;
the implant balloon assembly 30 includes an implant balloon 301, an implant balloon handle 302, and a guidewire 303; the implanting balloon 301 is made of medical polymer material (preferably PTFE film sintered and shaped or PET silk woven), and is dumbbell-shaped, and micropores are arranged at the upper end and the lower end of the implanting balloon; the distal end of the implantation saccule 301 is fixedly provided with a sealing head 304 with a closed distal end; the proximal end of the sealing head 304 is provided with a blind hole 305 which is opened towards the inside of the implantation balloon 301; the implant balloon handle 302 is connected to the proximal end of the implant balloon 301.
The conveying inner pipe assembly 40 comprises a conveying inner pipe 401, a sliding block guide rail 402, an inner pipe knob 403, an inner pipe sliding block 404 and a conveying port 405; the conveying inner pipe 401 is fixedly connected with the inner pipe sliding block 404 (preferably glued, hot melt or integrally injection molded); the inner tube sliding block 404 is in threaded connection with the inner tube knob 403, and the inner tube knob 403 is rotated to control the inner tube 401 to axially stretch; the delivery port 405 is a standard luer fitting for connecting to a bone filler injection device;
the outer tube assembly 50 includes an outer tube 501, an outer tube slider 502, and an outer tube knob 503; the outer tube 501 is fixedly connected with the outer tube slide block 502 (preferably glued, hot melt or integrally injection molded); the outer tube sliding block 502 is in threaded connection with the outer tube knob 503, and the outer tube 501 can be controlled to axially stretch and retract by rotating the outer tube knob 503;
the press bar assembly comprises a press bar 801 and a press bar handle 802;
wherein the distal end of the curved section of the guide wire 303 passes through the interior of the implant balloon 301 and is inserted into the blind hole 305; the inner diameter of the outer tube 501 is slightly larger than the outer diameter of the inner delivery tube 401, the inner delivery tube 401 is a rigid tube, and the distal end of the inner delivery tube is connected with the implantation balloon 301 and can be slidably inserted into the outer tube 501; the distal end of the inner delivery tube 401 or the distal end of the outer tube 501 is deformed (i.e., the inner delivery tube 401 is flared or the outer tube 501 is necked) such that a line or surface contact is formed when the distal ends of the inner delivery tube 401 and the outer tube 501 are assembled coaxially, thereby securing the proximal end of the implant balloon 301 between the inner delivery tube 401 and the outer tube 501.
Example 2
As shown in fig. 8a, S1, positioning a diseased vertebra under the assistance of an X-ray C-arm or CT image, using the cavity opening assembly to penetrate the access through the pedicle 601, entering the upper vertebral body 602, and establishing a first working channel;
as shown in fig. 8b, S2, rotating and simultaneously advancing the soft drill assembly 20, creates a second curved passage of 80 ° -100 ° between the upper vertebral body 602, the intervertebral space 603, and the lower vertebral body 604;
as shown in fig. 10a, S3, extracting the soft drill assembly 20 and inserting the implant balloon assembly 30, the delivery inner tube assembly 40 and the outer tube assembly 50 until the head 304 reaches the bottom end of the second curved channel, and extracting the guide wire handle 302;
as shown in fig. 10b and 10c, S4, injecting bone cement along the delivery port 405 in an amount matching the expansion volume of the implant balloon 301, and rotating the inner delivery tube knob 403 counterclockwise, retracting the inner delivery tube 401, and disengaging the proximal end of the inner delivery tube 401 from the implant balloon 301;
as shown in fig. 10d, S5, inserting the pressing rod 801 along the delivery port 405, compressing the pressing rod handle 802 to completely enter the bone cement into the implantation balloon 301, and withdrawing the pressing rod 801 and the pressing rod handle 802;
as shown in fig. 10e and 10f, S6, rotating the outer tube knob 503 counterclockwise, disengaging the outer tube 501 from the implant balloon 301;
as shown in fig. 10g, S7, the puncture needle tube assembly 10 is withdrawn, and the implant balloon 301 is left between the vertebral bodies, thereby completing the operation.
Example 3
As shown in fig. 8a, S1, positioning a diseased vertebra under the assistance of an X-ray C-arm or CT image, using the cavity opening assembly to penetrate the access through the pedicle 601, entering the upper vertebral body 602, and establishing a first working channel;
as shown in fig. 8b, S2, rotating and simultaneously advancing the soft drill assembly 20, creates a second curved passage of 80 ° -100 ° between the upper vertebral body 602, the intervertebral space 603, and the lower vertebral body 604;
as shown in fig. 9a and 9b, S3, inserting an expansion balloon assembly, so that the expansion implant balloon 701 reaches the bottom end of the second curved channel of the lower vertebral body 604, injecting a contrast agent along the contrast agent injection port 702, confirming the position of the expansion implant balloon 701 with the aid of an X-ray C-arm, connecting a pressure pump to the expansion implant balloon pressure pump connection port 703, and expanding cancellous bone in the vertebral body; the cancellous bone within the upper vertebral body 602 is expanded using the same method;
as shown in fig. 10a, S4, extracting the soft drill assembly 20 and inserting the implant balloon assembly 30, the delivery inner tube assembly 40 and the outer tube assembly 50 until the end cap 304 reaches the bottom end of the second curved channel, and extracting the guide wire handle 302;
as shown in fig. 10b and 10c, S5, injecting bone cement along the delivery port 405 in an amount matching the expansion volume of the implant balloon 301, and rotating the inner delivery tube knob 403 counterclockwise, retracting the inner delivery tube 401, and disengaging the proximal end of the inner delivery tube 401 from the implant balloon 301;
as shown in fig. 10d, S6, the pressing rod 801 is inserted along the delivery port 405, the pressing rod handle 802 is pressed to completely enter the bone cement into the implant balloon 301, and the pressing rod 801 and the pressing rod handle 802 are withdrawn.
As shown in fig. 10e and 10f, S7, rotating the outer tube knob 503 counterclockwise, disengaging the outer tube 501 from the implant balloon 301;
as shown in fig. 10g, S8, the puncture needle tube assembly 10 is withdrawn, and the implant balloon 301 is left between the vertebral bodies, thereby completing the operation.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A transpedicular interbody fusion system comprising an open cavity assembly, an implant balloon assembly (30), a delivery inner tube assembly (40), and an outer tube assembly (50);
the cavity opening assembly comprises a puncture needle tube assembly (10) and a soft drill assembly (20); the puncture needle tube assembly (10) comprises a connecting port (101) and a needle tube (102); the soft drill assembly (20) comprises a flexible shaft (201) and a drill bit (202); the puncture needle tube assembly (10) is connected with the head end of the soft drill assembly (20) through a connecting port (101);
the implantation balloon assembly (30) comprises an implantation balloon (301), an implantation balloon handle (302) and a guide wire (303); the implantation saccule (301) is dumbbell-shaped, and a sealing head (304) with a closed distal end is fixedly arranged at the distal end of the implantation saccule; the proximal end of the sealing head (304) is provided with a blind hole (305) with an opening facing the inside of the implantation sacculus (301); the implantation balloon handle (302) is connected with the proximal end of the implantation balloon (301);
the conveying inner pipe assembly (40) comprises a conveying inner pipe (401), a sliding block guide rail (402), an inner pipe knob (403), an inner pipe sliding block (404) and a conveying port (405); the conveying inner pipe (401) is fixedly connected with the inner pipe sliding block (404); the inner tube sliding block (404) is in threaded connection with the inner tube knob (403), and the conveying inner tube (401) can be controlled to axially stretch and retract by rotating the inner tube knob (403);
the outer tube assembly (50) comprises an outer tube (501), an outer tube slider (502) and an outer tube knob (503); the fixed bent angle part of the far end of the outer tube (501) is preloaded in the adjusting tube, and the outer tube (501) is fixedly connected with the outer tube sliding block (502); the outer tube sliding block (502) is in threaded connection with the outer tube knob (503), and the outer tube (501) can be controlled to axially stretch and retract by rotating the outer tube knob (503);
wherein the distal end of the curved section of the guide wire (303) passes through the interior of the implantation balloon (301) and is inserted into the blind hole (305); the inner diameter of the outer tube (501) is slightly larger than the outer diameter of the inner conveying tube (401), the inner conveying tube (401) is a rigid tube, and the distal end of the inner conveying tube is connected with the implantation balloon (301) and can be inserted into the outer tube (501) in a sliding manner; the distal end of the inner delivery tube (401) or the distal end of the outer tube (501) is deformed such that a wire or surface contact is formed when the distal ends of the inner delivery tube (401) and the outer tube (501) are assembled coaxially, thereby securing the proximal end of the implant balloon (301) between the inner delivery tube (401) and the outer tube (501);
the flexible shaft (201) is made of shape memory alloy, and the bending angle of the flexible shaft (201) is 80-100 degrees; the soft drill component (20) can rotate and simultaneously propulsively establish a bending channel of 80-100 degrees among the upper section vertebral body (602), the intervertebral space (603) and the lower section vertebral body (604);
the drill bit (202) is a pointed or round head and has rigidity for bearing the thrust of a tissue cavity opening without deformation;
further comprises: a hold-down bar assembly; the plunger assembly includes a plunger (801) and a plunger handle (802).
2. The transpedicular interbody fusion system of claim 1, wherein the connection port (101) is threaded and the penetrating needle cannula assembly (10) is threadably connected to the head end of the soft drill assembly (20) via the connection port (101).
3. The transpedicular interbody fusion system of claim 1, wherein the shape memory alloy is a nickel-titanium alloy.
4. The transpedicular interbody fusion system according to claim 1, wherein the implant balloon (301) is made of a medical polymer material, and has micropores provided at both upper and lower ends of a dumbbell shape.
5. The transpedicular interbody fusion system of claim 4, wherein the implant balloon (301) is polytetrafluoroethylene film sintered set or a braided polyethylene terephthalate.
6. The transpedicular interbody fusion system of claim 1, wherein the delivery inner tube (401) is glued, heat fused, or integrally injection molded with the inner tube slider (404); the outer tube (501) is glued or hot-melted or integrally injection-molded with the outer tube slide block (502).
7. The transpedicular intervertebral fusion system of claim 1, wherein the delivery port (405) is a standard luer fitting for connecting to a bone filler injection device.
8. The transpedicular interbody fusion system according to claim 1, wherein the deforming process of the distal end of the delivery inner tube (401) or the distal end of the outer tube (501) is flaring of the delivery inner tube (401) or necking of the outer tube (501).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011010446.4A CN112043466B (en) | 2020-09-23 | 2020-09-23 | Transpedicular interbody fusion system |
| PCT/CN2021/113359 WO2022062779A1 (en) | 2020-09-23 | 2021-08-18 | Transpedicular intervertebral fusion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011010446.4A CN112043466B (en) | 2020-09-23 | 2020-09-23 | Transpedicular interbody fusion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112043466A CN112043466A (en) | 2020-12-08 |
| CN112043466B true CN112043466B (en) | 2024-02-27 |
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| CN112043466B (en) * | 2020-09-23 | 2024-02-27 | 宁波华科润生物科技有限公司 | Transpedicular interbody fusion system |
| CN113693793A (en) * | 2021-08-11 | 2021-11-26 | 宁波华科润生物科技有限公司 | Intervertebral fusion system under full scope of backbone |
| CN113813088B (en) * | 2021-08-11 | 2024-07-23 | 宁波华科润生物科技有限公司 | Annular interbody fusion system under full endoscope of backbone |
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| CN112043466A (en) | 2020-12-08 |
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