Expandable percutaneous puncture needle

Abstract

The present invention discloses an expandable percutaneous puncture needle, belonging to the technical field of medical devices, comprising a needle core and a syringe, wherein the needle core is a solid needle, and the syringe is wrapped around the outer periphery of the needle core, the needle core is a cylinder, the inner hole diameter of the syringe is equal to the outer circle diameter of the needle core, and teeth are symmetrically arranged on both sides of the needle core, the teeth are in the shape of a triangular prism, and the syringe is composed of two semicircular barrel walls, the teeth pass through the gap of the syringe and a part of the teeth are exposed outside the syringe, and the teeth arranged on the needle core expand the range in the bone when the needle core is rotated, and the two barrel walls are driven to separate from each other by a connecting driving mechanism to achieve the same size as the outer diameter of the outer sheath of a conventional expansion sleeve, so as to realize the expansion of the puncture needle and replace the function of the expansion sleeve, thereby eliminating the insertion process of the guide needle and the expansion sleeve, making the surgical operation simpler and safer, reducing the difficulty and risk of the surgery, and reducing the pain and tissue damage caused to the patient by the secondary insertion of the sleeve.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an expandable percutaneous puncture needle. Background Art

[0002] Osteoporosis is a common disease among the elderly population, characterized by decreased bone mass, decreased bone strength and destruction of bone microstructure. Fractures of the limbs and thoracolumbar vertebrae usually occur after daily weight bearing, activities and falls. With the advent of an aging society, the proportion of the elderly in the population is increasing, and the incidence of thoracolumbar osteoporotic fractures is increasing year by year. Percutaneous vertebroplasty (PVP) is currently the first choice and widely used minimally invasive surgical technique for the treatment of thoracolumbar osteoporotic fractures in clinical practice. PVP surgery uses a percutaneous puncture needle to puncture the skin into the affected vertebral body, then place a cannula and perform balloon dilation, and finally inject bone cement into the vertebral body to achieve the purpose of strengthening and repairing the vertebral structure. The current PVP surgery is generally performed under local anesthesia. However, before establishing a working channel for the dilation balloon catheter to pass through, it is necessary to insert two cannulas and one guide wire, which makes the patient endure the pain of inserting the cannula into the injured vertebra twice. The first insertion is to successfully insert the percutaneous puncture needle into the target vertebra; then the needle core of the percutaneous puncture needle is pulled out, a guide wire is inserted along the puncture needle, and the percutaneous puncture needle is pulled out; the second insertion is to insert the dilation cannula into the vertebra along the guide wire, pull out the dilator, and establish a working channel.

[0003] The utility model with patent number CN 207679850 U discloses an improved percutaneous puncture balloon dilatation vertebral kyphoplasty surgical instrument, including a balloon dilator and a working sleeve, characterized in that the balloon dilator includes a three-way valve, an insertion part, and a balloon, and a circumferential groove is arranged on the outer wall of the insertion part of the balloon dilator; the working sleeve includes a gripping part, a tube head, a tube body and a clamping device, the gripping part of the working sleeve is on both sides of the working sleeve tube head, and the clamping device is on the other two sides of the working sleeve tube head; the clamping device is embedded in the tube wall of the working sleeve tube head, the clamping device can be telescopic in the tube wall, and the clamping operation with the groove is convenient, which can not only solve the problem of balloon movement, but also effectively control the depth of the balloon entering the vertebral body. However, before the balloon enters, a working channel of the balloon must be established first. The establishment of the current working channel requires inserting two sleeves and one guide wire, which increases the patient's pain, tissue damage, and the complexity, risk and difficulty of the operation. Summary of the invention

[0004] The embodiment of the present invention provides an expandable percutaneous puncture needle to solve the technical problem that the traditional PVP surgery needs to insert the cannula twice and the guide wire once, and the patient has to endure the pain of inserting the cannula into the injured vertebra twice.

[0005] The embodiment of the present invention adopts the following technical scheme: it includes a needle core and a syringe, the needle core is a solid needle, the syringe is wrapped around the outer periphery of the needle core, the needle core is a cylinder, the inner hole diameter of the syringe is equal to the outer ring diameter of the needle core, teeth are symmetrically arranged on both sides of the needle core, the teeth are triangular prism-shaped, the syringe is composed of two semicircular cylinder walls, the teeth pass through the gap of the syringe and a part of the teeth are exposed outside the syringe.

[0006] Furthermore, the syringe is provided with a connecting drive mechanism, and the connecting drive mechanism is drivingly connected to one end of the syringe.

[0007] Furthermore, the connecting driving mechanism includes a connecting plate, a transmission column, a rotating disk and an external box, the connecting plate and the transmission column are both provided with two, the lower end of each connecting plate is connected to a cylinder wall, the upper section of each connecting plate is connected to a transmission column, the transmission column is movably connected to the rotating disk, the bottom surface of the rotating disk is provided with a slide groove, the slide groove is in the shape of an arc, the transmission column is arranged in the slide groove, the top end of the transmission column is provided with a protrusion, the upper part of the slide groove is provided with a connecting groove corresponding to the protrusion, the rotating disk is arranged in an internal cavity in the external box, the bottom of the external box is provided with a movable groove for accommodating the connecting plate, the top surface of the rotating disk is provided with a rotating handle, the rotating handle is exposed outside the external box, the inside of the rotating handle is provided with a through hole, and the center of the rotating disk and the external box are both provided with through holes.

[0008] Furthermore, the connecting drive mechanism includes a rack, a rotating gear, a positioning box and a rotating handle, two racks are provided, both of which are meshed with the rotating gear, the lower end of each rack is connected to a tube wall, a trapezoidal slider is provided on the top surface of each rack, a trapezoidal groove for accommodating the trapezoidal slider is provided on the bottom of the positioning box, a through hole is provided in the center of the positioning box, a through hole is provided inside the rotating handle, and the rotating handle passes through the through hole of the positioning box to be connected with the rotating gear.

[0009] Furthermore, the rotating disk is provided with a locking groove, the external box is provided with a locking switch, and the locking switch is provided with a locking bevel block corresponding to the locking groove.

[0010] Furthermore, a rotating handle is provided above the rotating handle.

[0011] Furthermore, a fixed handle is provided at the top of the needle core, a groove is provided on the top surface of the rotating handle, and a protrusion corresponding to the groove of the rotating handle is provided on the bottom surface of the fixed handle.

[0012] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0013] Firstly, the embodiment of the present invention uses the teeth arranged on the needle core to expand the range in the bone when the needle core is rotated, and drives the two barrel walls to separate from each other through the connection driving mechanism so that the outer diameter of the puncture needle expands. At this time, the outer diameter of the percutaneous puncture needle expands to the same size as the outer diameter of the outer sheath of the conventional expansion sleeve, thereby eliminating the insertion process of the guide needle and the expansion sleeve, replacing the functions of these two tools, making the surgical operation simpler and safer, reducing the difficulty and risk of the operation, and reducing the pain and tissue damage caused to the patient by the secondary insertion of the sleeve under local anesthesia.

[0014] Secondly, the embodiment of the present invention uses a locking switch to lock the locking bevel block in the position of the locking groove to prevent the rotating handle from being accidentally touched. The rotating disk moves so that the two barrel walls remain in a state of clamping the needle core when locked. When the two barrel walls need to be separated to a certain distance for expansion, the locking switch is slid to the other end, so that the locking bevel block leaves the position of the locking groove, the lock is released, and then the two barrel walls are separated by the rotating handle to achieve the expansion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0017] Figure 2 It is an exploded view at a first angle in the present invention;

[0018] Figure 3 It is an exploded view from a second angle in the present invention;

[0019] Figure 4 It is a structural schematic diagram of the rotating disk in the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the external box in the present invention;

[0021] Figure 6 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 7 It is a schematic diagram of the movement of the transmission column when the rotating disk rotates clockwise in the present invention;

[0023] Figure 8 It is a schematic diagram of the movement of the transmission column when the rotating disk rotates counterclockwise in the present invention;

[0024] Fig. 9 It is a structural schematic diagram of a second embodiment of a connecting drive mechanism in the present invention;

[0025] Fig.10 It is an exploded view of the second embodiment of the connection drive mechanism in the present invention.

[0026] Reference numerals

[0027] Needle core 1, tooth piece 11, fixed handle 12, syringe 2, syringe wall 21, connecting drive mechanism 3, connecting plate 31, transmission column 32, protrusion 321, rotating disk 33, slide groove 331, connecting groove 3311, rotating handle 332, rotating handle 3321, locking groove 333, external box 34, moving groove 341, locking switch 342, locking bevel block 3421, rack 35, trapezoidal slider 351, rotating gear 36, positioning box 37, trapezoidal groove 371, rotating handle 38. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] An embodiment of the present invention provides an expandable percutaneous puncture needle, comprising a needle core 1 and a syringe 2, wherein the needle core 1 is a solid needle, and the syringe 2 is wrapped around the outer periphery of the needle core 1, the needle core 1 is a cylinder, and the inner hole diameter of the syringe 2 is equal to the outer ring diameter of the needle core 1, and teeth 11 are symmetrically arranged on both sides of the needle core 1, and the teeth 11 are triangular prism-shaped, and the syringe 2 is composed of two semicircular cylinder walls 21, and the teeth 11 pass through the gap of the syringe 2 and a part of the teeth 11 is exposed outside the syringe 2. When in use, the needle core 1 of the puncture needle and the syringe 2 outside the needle core 1 are tightly combined, and after the needle core 1 and the syringe 2 are inserted into the target vertebral body as a whole, the puncture needle is rotated as a whole to expand the range in the bone through the triangular prism-shaped teeth 11 on both sides of the needle core 1.

[0031] Preferably, a connecting drive mechanism 3 is provided on the syringe 2, and the connecting drive mechanism 3 is drivingly connected to one end of the syringe 2. The connecting drive mechanism 3 connects the two barrel walls 21 together and drives the two barrel walls 21 to separate by driving the connecting drive mechanism 3.

[0032] The first embodiment of the connecting driving mechanism 3, the connecting driving mechanism 3 includes a connecting plate 31, a transmission column 32, a rotating disk 33 and an external box 34, the connecting plate 31 and the transmission column 32 are each provided with two, the lower end of each connecting plate 31 is connected to a piece of cylinder wall 21, the upper section of each connecting plate 31 is connected to a transmission column 32, the transmission column 32 is movably connected to the rotating disk 33, the bottom surface of the rotating disk 33 is provided with a slide groove 331, the slide groove 331 is in the shape of an arc, the transmission column 32 is arranged in the slide groove 331, the top of the transmission column 32 is provided with a protrusion 321, the upper part of the slide groove 331 is provided with a connecting groove 3311 corresponding to the protrusion 321, the rotating disk 33 is arranged in the internal cavity of the external box 34, the bottom of the external box 34 is provided with a movable groove 341 for accommodating the connecting plate 31, the top surface of the rotating disk 33 is provided with a rotating handle 332, the rotating handle 332 is exposed outside the external box 34, the The interior of the rotating handle 332 is provided with a through hole, and the centers of the rotating disk 33 and the external box 34 are both provided with a through hole. The needle core 1 passes through the through holes of the rotating handle 332, the rotating disk 33 and the external box 34 in turn and is then surrounded by the two barrel walls 21 below the connecting plate 31. In the initial state, the needle core 1 of the puncture needle and the two barrel walls 21 outside the needle core 1 are tightly combined together. After the needle core 1 and the syringe 2 are inserted into the target vertebral body as a whole, the needle core 1 and the syringe 2 are rotated as a whole, and the range in the bone is expanded by the triangular prism-shaped teeth 11 on both sides of the needle core 1, and then the needle core 1 is pulled out, and the rotating handle 332 is rotated by hand to rotate the rotating disk 33, and the rotation of the rotating disk 33 causes the transmission column 32 in the slide groove 331 to move. Since the connecting plate 31 can only perform translational motion in the moving groove 341 on the external box 34, the transmission column 32 drives the two barrel walls 21 to separate through the connecting plate 31, so that the outer diameter of the puncture needle is expanded, replacing the function of the expansion sleeve.

[0033] Embodiment 2 of the connection drive mechanism 3, the connection drive mechanism 3 comprises a rack 35, a rotating gear 36, a positioning box 37 and a rotating handle 38, two racks 35 are provided, both of the two racks 35 are meshed with the rotating gear 36, the lower end of each rack 35 is connected to a piece of cylinder wall 21, a trapezoidal slider 351 is provided on the top surface of each rack 35, a trapezoidal groove 371 for accommodating the trapezoidal slider 351 is provided at the bottom of the positioning box 37, a through hole is provided in the center of the positioning box 37, and the rotating handle 38 is provided with a through hole. A through hole is provided inside 8, and the rotating handle 38 passes through the through hole of the positioning box 37 and is connected to the rotating gear 36. The rotating handle 38 is turned by hand to rotate the rotating gear 36 connected to the rotating handle 38, and the rotating gear 36 rotates to drive the two racks 35 to move through meshing. Since the trapezoidal slider 351 on the rack 35 is in the trapezoidal groove 371, the rack 35 can only move along the trapezoidal groove 371. The movement of the rack 35 drives the two barrel walls 21 to separate, so that the outer diameter of the puncture needle is enlarged, replacing the function of the expansion sleeve.

[0034] Preferably, a locking groove 333 is provided on the rotating disk 33, and a locking switch 342 is provided on the external box 34. A locking bevel 3421 corresponding to the locking groove 333 is provided on the locking switch 342. The locking bevel 3421 is stuck in the position of the locking groove 333 by the locking switch 342 to prevent the rotating handle 332 from being accidentally touched. The rotating disk 33 moves so that the two barrel walls 21 remain in a state of clamping the needle core 1 when locked. When the two barrel walls 21 need to be separated to a certain distance for expansion, the locking switch 342 is slid to the other end so that the locking bevel 3421 leaves the position of the locking groove 333, the lock is released, and then the two barrel walls 21 are separated by the rotating handle 332 so that the two barrel walls 21 move back to back in a straight line to achieve an expansion effect.

[0035] Preferably, a rotating handle 3321 is provided above the rotating handle 332. When the rotating handle 332 is rotated by holding the rotating handle 3321, the rotating disk 33 is rotated, which is ergonomic and more comfortable to operate.

[0036] Preferably, a fixed handle 12 is provided at the top of the needle core 1 , a groove is provided on the top surface of the rotating handle 3321 , and a protrusion corresponding to the groove of the rotating handle 3321 is provided on the bottom surface of the fixed handle 12 .

[0037] Working principle: In the initial state, the needle core 1 of the puncture needle and the two tube walls 21 outside the needle core 1 are tightly together, and the two tube walls 21 form the syringe 2. When the needle core 1 and the syringe 2 are punctured to the target position and depth of the injured vertebra as a whole, the needle core 1 and the syringe 2 are rotated as a whole. Since the sharp tip of the triangular prism-shaped tooth piece 11 is exposed to the syringe 2, the triangular prism-shaped tooth pieces 11 on both sides of the rotating needle core 1 will expand the range in the bone, and then the needle core 1 is pulled out, and the locking switch 342 is slid to the other end, so that the locking bevel block 3421 leaves the position of the locking groove 333, the lock is released, and then the rotating handle 332 is rotated by hand to make the rotating disk 33 rotates, and the rotation of the rotating disk 33 causes the transmission column 32 in the slide groove 331 to move. Since the connecting plate 31 can only perform translational motion in the movable groove 341 on the external box 34, the transmission column 32 drives the two tube walls 21 to separate through the connecting plate 31, so that the outer diameter of the puncture needle expands. At this time, the outer diameter of the percutaneous puncture needle is expanded to the same size as the outer diameter of the outer sheath of the conventional expansion sleeve, thereby eliminating the insertion process of the guide needle and the expansion sleeve, replacing the functions of these two tools, making the surgical operation simpler and safer, reducing the difficulty and risk of the operation, and reducing the pain and tissue damage caused to the patient by the secondary insertion of the sleeve under local anesthesia.

[0038] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An expandable percutaneous puncture needle, characterized in that: include: A needle core (1) and a needle barrel (2), wherein the needle core (1) is a solid needle, the needle barrel (2) is wrapped around the outer periphery of the needle core (1), the needle core (1) is a cylinder, the inner diameter of the needle barrel (2) is equal to the outer diameter of the needle core (1), the needle core (1) is symmetrically provided with tooth pieces (11) on both sides, the tooth pieces (11) are in the shape of a triangular prism, the needle barrel (2) is composed of two semicircular barrel walls (21), the tooth pieces (11) pass through the gap of the needle barrel (2) and a part of the tooth pieces (11) is exposed outside the needle barrel (2); a connecting drive mechanism (3) is provided on the needle barrel (2), the connecting drive mechanism (3) is connected to a part of the needle barrel (2) The connecting drive mechanism (3) comprises a connecting plate (31), a transmission column (32), a rotating disk (33) and an external box (34); two connecting plates (31) and two transmission columns (32) are provided; the lower end of each connecting plate (31) is connected to a cylinder wall (21); the upper section of each connecting plate (31) is connected to a transmission column (32); the transmission column (32) and the rotating disk (33) are movably connected; a slide groove (331) is provided on the bottom surface of the rotating disk (33); the slide groove (331) is in the shape of an arc; the transmission column (32) is arranged in the slide groove (331); the top of the transmission column (32) is provided with The outer box (34) comprises a protrusion (321), a connecting groove (3311) corresponding to the protrusion (321) is provided above the slide groove (331), the rotating disk (33) is arranged in an internal cavity in the external box (34), the bottom of the external box (34) is provided with a movable groove (341) for accommodating the connecting plate (31), the top surface of the rotating disk (33) is provided with a rotating handle (332), the rotating handle (332) is exposed outside the external box (34), a through hole is provided inside the rotating handle (332), and the centers of the rotating disk (33) and the external box (34) are both provided with through holes; the connecting drive mechanism (3) comprises a rack (35), a rotating gear ( 36), a positioning box (37) and a first rotating handle (38), two racks (35) are provided, both of the two racks (35) are meshed with the rotating gear (36), the lower end of each rack (35) is connected to a piece of cylinder wall (21), a trapezoidal slider (351) is provided on the top surface of each rack (35), a trapezoidal groove (371) for accommodating the trapezoidal slider (351) is provided at the bottom of the positioning box (37), a through hole is provided at the center of the positioning box (37), a through hole is provided inside the first rotating handle (38), and the first rotating handle (38) passes through the through hole of the positioning box (37) and is connected to the rotating gear (36).

2. The expandable percutaneous puncture needle according to claim 1, characterized in that: The rotating disk (33) is provided with a locking groove (333), the external box (34) is provided with a locking switch (342), and the locking switch (342) is provided with a locking bevel block (3421) corresponding to the locking groove (333).

3. The expandable percutaneous puncture needle according to claim 2, characterized in that: A second rotating handle (3321) is provided above the rotating handle (332).

4. The expandable percutaneous puncture needle according to claim 3, characterized in that: A fixed handle (12) is provided at the top end of the needle core (1), a groove is provided on the top surface of the second rotating handle (3321), and a protrusion corresponding to the groove of the second rotating handle (3321) is provided on the bottom surface of the fixed handle (12).

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