RU2817034C1 - Interbody fusion transpedicular system - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: invention refers to medical equipment, namely to a transpedicular system for interbody fusion. Transpedicular system for interbody fusion includes an instrument for forming a cavity, an implantation balloon assembly, an internal delivery tube assembly, an external tube assembly. Tool for forming the cavity includes a tubular puncture needle assembly and a flexible drill assembly. Tubular puncture needle assembly comprises a connecting channel and a needle tube. Flexible drill assembly comprises a flexible rod and a drill head. Tubular puncture needle assembly is connected to the front end of the flexible drill assembly through a connecting channel. Implantation balloon assembly includes an implantation balloon, a balloon implantation handle and a guidewire. Implantation balloon has the shape of a dumbbell, and the sealing head with a closed distal end is additionally fixed on the distal end of the implantation balloon. Blind hole with a mouth facing the inside of the implantation balloon is provided at the proximal end of the sealing head. Balloon implantation handle is connected to the proximal end of the implantation balloon. Inner feed tube assembly includes guide, inner tube handle, inner tube slider and inlet. Inner feed tube is rigidly connected to the slider of the inner tube. Slider of the inner tube is connected by a threaded connection to the handle of the inner tube. Handle of the inner tube is rotatable to control the axial movement of the inner feed tube. External tube assembly includes an external tube slider and an external tube handle. External tube is rigidly connected to the slider of the external tube. External tube slider is threadedly connected with external tube handle. External tube handle is rotatable to control axial movement of external tube.

EFFECT: use of the invention allows to push back some physiological tissues of the intervertebral space when forming a cavity and to preserve most of the physiological structures of vertebral bodies.

10 cl, 10 dwg

Description

TECHNICAL FIELD

The present invention relates to the technical field of medical equipment, in particular to a transpedicular system for interbody fusion.

BACKGROUND OF THE ART

Osteoporotic vertebral compression fracture is a common disease affecting the health of middle-aged and elderly people. For vertebral compression fractures, modern surgical treatments include percutaneous vertebroplasty (PVP) and percutaneous balloon kyphoplasty (BPK).

In percutaneous balloon kyphoplasty (BKP), an expandable implantation balloon is inserted into the destroyed vertebral body through percutaneous puncture, and expansion of the implantation balloon allows the supporting platform of the vertebral body to return to its normal position, i.e., restore the height of the vertebral body, eliminate kyphosis and form a cavity in the vertebral body , which is designed to inject high-viscosity bone cement under low pressure. To ensure smooth insertion of the implantation balloon into the vertebral body, first of all, it is necessary to create an operating channel using a puncture needle and an operating cannula, then, using a bone drill, an operating channel is created for insertion for the implantation balloon before expanding it, then the implantation balloon is inserted into the vertebral body, forming the necessary cavity , after which it is removed and bone cement is injected. Patients with multisegmental lesions of the vertebral bodies during surgery require bilateral puncture to introduce bone cement into each of the vertebral bodies, which is difficult to implement and/or causes greater harm to patients, causes a high likelihood of complications and increases the financial burden on patients. In addition, all operations must be performed under X-ray control, and the more complex and lengthy the operation, the higher the demands placed on the doctor, and the greater the harm caused to the patient’s health.

In addition, patients with multisegmental lesions of the vertebral bodies often experience degenerative diseases and structural damage to the spine. Existing methods of percutaneous vertebroplasty (PVP) and percutaneous balloon kyphoplasty (BKP) determine the effectiveness of surgical treatment only with single-segment vertebroplasty and strengthening of the spine, but do not have a practical effect on restoring the resistance and stabilization of the anterior and middle supporting columns of the spine, on restoring and maintaining the physiological properties of the spine. bending, as well as to expand the intervertebral space and relieve compression of the dural sac and nerve roots.

Currently, it is very often necessary to use an interbody fusion cage to treat patients. The mechanism of action of the cage for interbody fusion is that it is placed on the affected intervertebral space, and after its installation, the distraction effect holds the muscles, fibrous rings, and the anterior and posterior longitudinal ligaments of the fused segments in constant tension, so that between the fused segments and the cage three-dimensional hyperstatic fixation can be achieved. Typically, implantation requires scraping of fibrous tissue from the target intervertebral space for the cage, which destroys the physiological structure of the human body; and to achieve a good supporting effect, the supporting surface must be as large as possible, which causes the creation of a large implantation channel, causing more damage to patients, a longer period of time to achieve the fusion effect after operations, and also the difficulty of achieving a satisfactory fusion effect in the elderly with poor bones .

Osteoporotic vertebral compression fractures, degenerative diseases, and structural injuries of the spine are common diseases that compromise the health of middle-aged and older adults. Currently, there is no invention in the country or abroad that could simultaneously solve the problem of these common diseases in middle-aged and elderly people. Elderly people suffering from two types of diseases, especially patients with lesions of several vertebrae, as a rule, have to undergo multiple operations of various types, which leads to great trauma, a long overall treatment cycle and high costs of surgical interventions.

Therefore, there is an urgent need for a transpedicular system for interbody fusion, which will not only simultaneously treat two diseases, such as osteoporotic vertebral compression fractures, degenerative diseases and structural injuries of the spine, but also reduce the number of operations in general during the treatment process, shorten the operation time, and also largely preserve the physiological structure of the intervertebral space.

DISCLOSURE OF INVENTION

Taking into account the existing shortcomings of the related art, the purpose of the present invention is to provide a transpedicular system for interbody fusion.

To achieve the above purpose and disclose the invention, the following technical schemes are used.

The present invention discloses a transpedicular system for interbody fusion, including a cavity forming tool in an assembled state, an implantation balloon in an assembled state, an internal delivery tube in an assembled state, and an outer tube in an assembled state.

The cavity forming instrument in the assembled state includes a tubular puncture needle in the assembled state and a flexible drill in the assembled state. The assembled tubular puncture needle includes a connecting channel and a needle tube. The assembled flexible drill includes a flexible rod and a drill head. The assembled tubular puncture needle is connected to the front end of the assembled flexible drill through a connecting channel.

The assembled implantation balloon includes an implantation balloon, a handle for implanting the balloon and a guidewire. The implantation balloon is shaped like a dumbbell, and a sealing head with a closed distal end is further secured to the distal end of the implantation balloon. At the proximal end of the sealing head there is a blind hole with an orifice facing the inside of the implantation balloon. The balloon implantation handle is connected to the proximal end of the implantation balloon.

The inner feed tube, when assembled, includes the inner feed tube, guide, inner tube handle, inner tube slider and inlet port. The inner feed tube is rigidly connected to the inner tube slider. The inner tube slider is threaded to the inner tube handle, and the inner tube handle can be rotated to control the axial expansion and contraction of the inner feed tube.

The assembled outer tube includes the outer tube, the outer tube slider, and the outer tube handle. The outer feed tube is rigidly connected to the outer tube slider. The outer tube slider is threaded to the outer tube handle, and the outer tube handle can be rotated to control the axial expansion and contraction of the outer tube.

The distal end of the flexible guidewire section is passed through the inside of the implantation balloon and inserted into the blind hole. The inner diameter of the outer tube is slightly larger than the outer diameter of the inner delivery tube, and the inner delivery tube is a rigid tube, and the distal end of the inner delivery tube is connected to the implantation balloon and slidably inserted into the outer tube. The distal end of the inner delivery tube or the distal end of the outer tube is deformed so that the distal end of the inner delivery tube and the distal end of the outer tube form a linear or surface contact in a coaxial connection, thereby fixing the proximal end of the implantation balloon between the inner delivery tube and the outer tube.

In a preferred embodiment, the connecting channel is threaded, and the tubular puncture needle in the assembled state is threadedly connected to the front end of the flexible drill in the assembled state through the connecting channel.

In a preferred embodiment, the flexible rod is made of an alloy that holds its shape with a bend angle of 80 to 100 degrees. The drill head is made in the form of a pointed head, a round head or a triangular pyramid and has rigidity that ensures a constant direction when transmitting force to form a cavity in the tissue.

It is also preferable that the shape-holding alloy be nickel-titanium.

The implantation balloon is made of medical polymer material in the shape of a dumbbell and has micropores at the upper and lower ends.

It is also preferable that the implantation balloon be formed from a fluoroplastic sintered membrane or woven PET fibers.

In a preferred embodiment, the inner feed tube and the inner tube slider are joined by bonding, hot melt or integral injection molding. The outer tube and the outer tube slider are connected by bonding, melt deposition or integral injection molding.

In a preferred embodiment, the inlet is a standard Luer fitting for connection to a device for introducing bone replacement filler.

In a preferred embodiment, the deformation of the distal end of the inner feed tube or the distal end of the outer tube is to widen the inner feed tube or narrow the outer tube.

Preferably, the system further includes a pressure rod. The press rod when assembled includes a press rod and a press rod handle.

Compared with the prior art, the present invention has the following technical advantages due to the use of technical solutions:

The transpedicular system for interbody fusion according to the present invention allows the formation of the upper and lower vertebrae, as well as maintaining a certain height of the intervertebral space between the upper and lower vertebral bodies through a single puncture, which solves the problems of the prior art, and reduces trauma, reduces the overall treatment time and reduces the cost of surgery in the treatment of patients suffering from the two diseases described above, which is especially important for patients with multi-segmental lesions of the vertebral bodies. The transpedicular system for interbody fusion in accordance with the present invention makes it possible to push aside some physiological tissues of the intervertebral space during the formation of the cavity and preserve most of the physiological structures of the vertebral bodies. According to the present invention, the fixed angular portion of the distal end of the outer tube is pre-positioned in the insertion tube so that instruments can easily pass through the operating channel, thus, the operator does not need to exert force to insert the instrument into the operating channel, and the fixed angular portion of the distal end of the outer tube The tube can be released and opened using the tube adjusting knob.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG 1a is a schematic view of a cavity forming tool in an assembled state according to Embodiment 1 of the present invention;

FIG 1b is a side view of a schematic view of a cavity forming tool in an assembled state according to Embodiment 1 of the present invention;

FIG 2 is a side view of a schematic view of a tubular puncture needle in an assembled state in accordance with Embodiment 1 of the present invention;

FIG. 3a is a schematic view of an assembled implantation balloon according to Embodiment 1 of the present invention;

FIG. 3b is a side view of a schematic view of an implantation balloon head in an assembled state according to Embodiment 1 of the present invention;

FIG. 3c is a schematic view of an implantation balloon according to Embodiment 1 of the present invention;

FIG. 4a is a schematic view of the inner supply tube in an assembled state according to Embodiment 1 of the present invention;

FIG. 4b is a side view of a schematic view of the inner supply tube in an assembled state according to Embodiment 1 of the present invention;

FIG. 5 is a schematic view of the outer tube in an assembled state in accordance with Embodiment 1 of the present invention;

FIG. 6 is a schematic view of a part of Embodiment 1 of the present invention;

FIG. 7a is a schematic view of a fixed implantation balloon in accordance with Embodiment 1 of the present invention;

FIG. 7b is a schematic view of another method for fixing an implantation balloon according to Embodiment 1 of the present invention;

FIG. 8a is a schematic sagittal plane when using the invention in the first step in Embodiment 2 or 3 of the present invention;

FIG. 8b is a schematic cross-section when using the invention in a second step in Embodiment 2 or 3 of the present invention;

FIG. 9a is a schematic view when the invention is used in the third step in Embodiment 3 of the present invention;

FIG. 9b is a schematic view when the invention is used in the third step in Embodiment 3 of the present invention;

FIG. 10a is a schematic view when the invention is used in the third step of the stage in Embodiment 2 or the fourth step in Embodiment 3 of the present invention;

FIG. 10b is a schematic view when the invention is used in the fourth step in Embodiment 2 or the fifth step in Embodiment 3 of the present invention;

FIG. 10c is a schematic view when the invention is used in the fourth step in Embodiment 2 or the fifth step in Embodiment 3 of the present invention;

FIG. 10d is a schematic view when the invention is used in the fifth step in Embodiment 2 or the sixth step in Embodiment 3 of the present invention;

FIG. 10e is a schematic view when the invention is used in the sixth step in Embodiment 2 or the seventh step in Embodiment 3 of the present invention;

FIG. 10f is a schematic view when the invention is used in the sixth step in Embodiment 2 or the eighth step in Embodiment 3 of the present invention; And

Fig. 10g is a schematic view when the invention is used in the seventh step in Embodiment 2 or the ninth step in Embodiment 3 of the present invention.

The following referral numbers are used:

Tubular puncture needle in assembled state 10; connecting channel 101; needle tube 102; flexible drill in assembled state 20; flexible rod 201; drill head 202; implantation balloon in assembled state 30; implantation balloon 301; handle for balloon implantation 302; conductor 303; sealing head 304; blind hole 305; internal supply tube in assembled state 40; inner feed tube 401; guide 402; inner tube handle 403; inner tube slider 404; inlet 405; outer tube assembly 50; outer tube 501; outer tube slider 502; outer tube handle 503; transpedicular 601; upper vertebra 602; intervertebral space 603; lower vertebra 604; expanding implantation balloon 701; injection port for contrast agent 702; a connecting channel of the pressure pump of the expanding implantation balloon 703; clamping bar 801; pressure rod 801; 802 pressure rod handle.

DETAILED DESCRIPTION

Hereinafter, the technical diagram in the embodiment will be described fully and clearly in accordance with the drawings; It is obvious that the described option is only one of the embodiments of the invention, but not the only one. Based on the described embodiments of this invention, all other embodiments implemented by one of ordinary skill in the art without any creative effort fall within the scope of protection of this invention.

It should be noted that the embodiments of the present invention and the characteristics of the embodiments can be combined together in the absence of conflicts.

The present invention will be further described in accordance with the accompanying drawings and specific embodiments, which, however, do not limit the present invention.

Embodiment 1

As shown in FIG. 1-7, this embodiment provides a transpedicular interbody fusion system that includes a cavity forming tool, an implantation balloon in an assembled state 30, an internal delivery tube in an assembled state 40, an outer tube in an assembled state 50, and a pressure rod in an assembled state. .

The cavity forming tool includes a tubular puncture needle in an assembled state 10 and a flexible drill in an assembled state 20. A tubular puncture needle in an assembled state 10 includes a connecting channel 101 and a needle tube 102. A flexible drill in an assembled state 20 includes a flexible rod 201 and a head drill 202. The connecting channel 101 is threaded, and the tubular puncture needle in the assembled state 10 is threadedly connected to the front end of the flexible drill in the assembled state 20 through the connecting channel 101. The flexible rod 201 is made of a shape-holding alloy (preferably nickel-titanium alloy) with a bend angle from 80 to 100 degrees. The drill head 202 is shaped like a pointed head, a round head, or a triangular pyramid and is rigid to provide directional stability while transmitting force to form a cavity in the tissue.

The implantation balloon in the assembled state 30 includes an implantation balloon 301, a balloon implantation handle 302, and a guidewire 303. The implantation balloon 301 is made of a medical polymer material (preferably fluoroplastic sintered membrane or woven PET threads) in the shape of a dumbbell and has micropores on the top and lower ends. A sealing head 304 with a closed distal end is further secured to the distal end of the implantation balloon 301. A blind hole 305 is provided at the proximal end of the sealing head 304 with an orifice facing the interior of the implantation balloon 301. A balloon implantation handle 302 is connected to the proximal end of the implantation balloon 301.

The assembled inner feed tube 40 includes an inner feed tube 401, a guide 402, an inner tube handle 403, an inner tube slider 404, and an inlet port 405. The inner feed tube 401 is rigidly connected to the inner tube slider 404 (preferably by bonding, melt coating or by integral injection molding). The inner tube slider 404 is threadably coupled to the handle of the inner tube 403, and the handle of the inner tube 403 can be rotated to control the axial expansion and contraction of the inner delivery tube 401. The inlet 405 is a standard Luer fitting for connection to the bone filler insertion device.

The outer tube, when assembled, 50 includes an outer tube 501, an outer tube slider 502, and an outer tube handle 503. The outer tube 501 is rigidly connected to the outer tube slider 502 (preferably by bonding, melt deposition, or integral injection molding). The outer tube slider 502 is threadably coupled to the outer tube handle 503, and the outer tube handle 503 is rotatable to control the axial expansion and contraction of the outer tube 501.

The press rod when assembled includes a press rod 801 and a press rod handle 802.

The distal end of the flexible section of the guidewire 303 is passed through the inside of the implantation balloon 301 and 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, and 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 is 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 expanded or the outer tube 501 is narrowed) such that the distal end of the inner delivery tube 501 the tubes 401 and the distal end of the outer tube 501 form a linear or surface contact in a coaxial connection, thereby securing the proximal end of the implantation balloon 301 between the inner delivery tube 401 and the outer tube 501.

Embodiment 2

As shown in FIG. 8a, in step S1, the affected vertebra is identified through an X-ray taken with a C-type frame device or computed tomography, and then a cavity-forming instrument is used for puncture and percutaneous access, and then the transpedicular 601 is installed in the upper vertebra 602 to create the first operating channel.

As shown in FIG. 8b, in step S2, the assembled flexible drill 20 is rotated and pushed to create a second curved channel at an angle of 80 to 100 degrees between the upper vertebra 602, the intervertebral space 603 and the lower vertebra 604.

As shown in FIG. 10a, in step S3, the flexible drill in the assembled state 20 is withdrawn and the implantation balloon is inserted in the assembled state 30, the inner supply tube in the assembled state 40 and the outer tube in the assembled state 50 are aligned until the sealing head 304 reaches the bottom of the second curved channel. , and the balloon implantation handle 302 is pulled out.

As shown in FIG. 10b and 10c, in step S4, bone cement is injected through the inlet port 405, the amount of the injected substance corresponds to the expansion volume of the implantation balloon 301, and the handle 403 of the inner delivery tube is rotated counterclockwise to retract the inner delivery tube 401 so that the proximal end of the inner the delivery tube 401 is separated from the implantation balloon 301.

As shown in FIG. 10d, in step S5, the pressure rod 801 is inserted into the inlet hole 405, the pressure rod handle 802 is pressed so that the bone cement is completely inserted into the implant balloon 301, and then the pressure rod 801 and the pressure rod handle 802 are withdrawn.

As shown in FIG. 10e and 10f, in step S6, the handle of the outer tube 503 is rotated counterclockwise to separate the outer tube 501 from the implantation balloon 301.

As shown in FIG. 10g, in step S7, the tubular puncture needle in the assembled state 10 is withdrawn, and the implantation balloon 301 is placed between the vertebral bodies to complete this operation.

Embodiment 3

As shown in FIG. 8a, in step S1, the affected vertebra is identified through an X-ray taken with a C-type frame device or computed tomography, and then a cavity-forming instrument is used for puncture and percutaneous access, and then the transpedicular 601 is installed in the upper vertebra 602 to create the first operating channel.

As shown in FIG. 8b, in step S2, the assembled flexible drill 20 is rotated and pushed to create a second curved channel at an angle of 80 to 100 degrees between the upper vertebra 602, the intervertebral space 603 and the lower vertebra 604.

As shown in FIG. 9a and 9b, in step S3, the expanding implant balloon in the assembled state is inserted such that the expanding implant balloon 701 reaches the bottom of the second curved canal of the lower vertebra 604, the contrast agent is introduced through the injection port 702, the position of the expanding implant balloon 701 is confirmed by an X-ray photograph taken using a C-type frame device, and the pressure pump is connected to the pressure pump connecting channel 703 of the expanding implant balloon so as to allow expansion of the cancellous bone in the vertebral body. The cancellous bone in the body of the upper vertebra 602 rises in the same way.

As shown in FIG. 10a, in step S4, the flexible drill in the assembled state 20 is withdrawn and the implantation balloon is inserted in the assembled state 30, the inner supply tube in the assembled state 40 and the outer tube in the assembled state 50 are aligned until the sealing head 304 reaches the bottom of the second curved channel. , and the balloon implantation handle 302 is pulled out.

As shown in FIG. 10b and 10c, in step S5, bone cement is injected through the inlet port 405, the amount of the injected substance corresponds to the expansion volume of the implantation balloon 301, and the handle 403 of the inner delivery tube is rotated counterclockwise to retract the inner delivery tube 401 so that the proximal end of the inner the delivery tube 401 is separated from the implantation balloon 301.

As shown in FIG. 10d, in step S6, the pressing rod 801 is inserted into inlet 405, the handle of the pressing rod 802 is pressed so that the bone cement is completely inserted into the implantation balloon 301, and then the pressing rod 801 and the handle of the pressing rod 802 are withdrawn.

As shown in FIG. 10e and 10f, in step S7, the handle of the outer tube 503 is rotated counterclockwise to separate the outer tube 501 from the implantation balloon 301.

As shown in FIG. 10g, in step S8, the tubular puncture needle in the assembled state 10 is withdrawn, and the implantation balloon 301 is placed between the vertebral bodies to complete this operation.

The above-described embodiments are only preferred embodiments of the present invention and do not limit the scope and scope of protection of the present invention. It will be understood by those skilled in the art that all circuits obtained using equivalent substitutions and obvious changes made in the description and drawings of the present invention should also be included within the scope of protection of the present invention.

Claims (15)

1. Transpedicular system for interbody fusion, including a tool for forming a cavity, an implantation balloon assembly (30), an internal supply tube assembly (40), an external tube assembly (50); characterized in that: the cavity forming tool includes a tubular puncture needle assembly (10) and a flexible drill assembly (20); the tubular puncture needle assembly (10) contains a connecting channel (101) and a needle tube (102); the flexible drill assembly (20) includes a flexible rod (201) and a drill head (202); and the tubular puncture needle assembly (10) is connected to the front end of the flexible drill assembly (20) through a connecting channel (101); the implantation balloon assembly (30) includes an implantation balloon (301), a balloon implantation handle (302) and a guidewire (303); the implantation balloon (301) is shaped like a dumbbell, and a sealing head (304) with a closed distal end is further secured to the distal end of the implantation balloon; a blind hole (305) with a mouth facing the inside of the implantation balloon (301) is provided at the proximal end of the sealing head (304); and a balloon implantation handle (302) is connected to the proximal end of the implantation balloon (301); the inner feed tube assembly (40) includes a guide (402), an inner tube handle (403), an inner tube slider (404), and an inlet port (405); the inner feed tube (401) is rigidly connected to the slider of the inner tube (404); the inner tube slider (404) is threadably connected to the inner tube handle (403), and the inner tube handle (403) is rotatable to control axial movement of the inner feed tube (401); And the outer tube assembly (50) includes an outer tube slider (502) and an outer tube handle (503); the outer tube (501) is rigidly connected to the slider (502) of the outer tube; the outer tube slider (502) is threadedly connected to the outer tube handle (503) and the outer tube handle (503) is rotatable to control axial movement of the outer tube (501); wherein the distal end of the flexible section of the conductor (303) is passed through the inside of the implantation balloon (301) and inserted into the blind hole (305); the inner diameter of the outer tube (501) is larger than the outer diameter of the inner supply tube (401), and the inner supply tube (401) is a rigid tube, and the distal end of the inner supply tube is connected to the implantation balloon (301) and slidably inserted into the outer tube ( 501); and the distal end of the inner feed tube (401) or the distal end of the outer tube (501) is deformed so that the distal end of the inner feed tube (401) and the distal end of the outer tube (501) form a linear or surface contact when coaxially connected, thereby fixing the proximal the end of the implantation balloon (301) between the inner supply tube (401) and the outer tube (501). 2. Transpedicular system for interbody fusion according to claim 1, characterized in that the connecting channel (101) is threaded and the tubular puncture needle assembly (10) is connected by means of a threaded connection to the front end of the flexible drill assembly (20) through the connecting channel (101 ). 3. Transpedicular system for interbody fusion according to claim 1, characterized in that the flexible rod (201) is made of an alloy that holds its shape, with a bending angle of 80 to 100 degrees; The drill head (202) is shaped like a pointed head, a round head, or a triangular pyramid and is rigid to provide directional stability while transmitting force to form a cavity in the tissue. 4. Transpedicular system for interbody fusion according to claim 3, characterized in that the shape memory alloy is nickel-titanium. 5. Transpedicular system for interbody fusion according to claim 1, characterized in that the implantation balloon (301) is made of medical polymer materials, and the upper and lower ends, made in the shape of a dumbbell, are also equipped with micropores. 6. Transpedicular system for interbody fusion according to claim 5, characterized in that the implantation balloon (301) is formed from a fluoroplastic sintered membrane or woven PET threads. 7. Transpedicular system for interbody fusion according to claim 1, characterized in that the inner supply tube (401) and the slider (404) of the inner tube are connected by gluing, melt coating or integral injection molding, and the outer tube (501) and the slider ( 502) of the outer tube are connected by bonding, melt deposition or integral injection molding. 8. The transpedicular system for interbody fusion according to claim 1, characterized in that the inlet (405) is a luer lock fitting for connection with a device for introducing bone replacement filler. 9. Transpedicular system for interbody fusion according to claim 1, characterized in that the deformation of the distal end of the internal supply tube (401) or the distal end of the outer tube (501) consists in the expansion of the internal supply tube (401) or the narrowing of the outer tube (501). 10. The transpedicular system for interbody fusion according to claim 1, characterized in that it further comprises a pressure rod assembly, which includes a pressure rod (801) and a pressure rod handle (802).