Bone marrow stimulation cone system

Abstract

A bone marrow stimulation cone system relates to the technical field of medical instruments and comprises a guide tube, a folding cone inner core and a handle. The head end of the guide pipe is detachably and fixedly connected with the handle, and the tail end of the guide pipe is provided with a bent part; the handle is provided with a handle through hole; the guide pipe is provided with a guide pipe through hole; the axis, at the head end of the guide pipe, of the guide pipe through hole is collinear with the axis of the handle through hole, and the included angle between the axis, at the bent portion, of the guide pipe through hole and the axis of the handle through hole is a bent angle. The bending angle is any angle between 0 and 90 degrees; the folding cone inner core sequentially penetrates through the handle through hole and the guide pipe through hole; the length of the folding cone inner core is larger than the sum of the length of the handle through hole and the length of the guide pipe through hole. The rigidity of the head end of the folding cone inner core is higher than that of the tail end of the folding cone inner core. The invention aims to provide the bone marrow stimulation cone system so as to solve the technical problems that in the prior art, a micro-fracture cone is large in punching diameter and low in puncture depth, and a pointed cone at the front end is prone to deformation and blunt.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bone marrow stimulation cone system. Background Art

[0002] Arthroscopic microfracture surgery refers to a surgical method in which microfractures are artificially created at the site of cartilage damage or ligament implantation during arthroscopy, allowing cellular components deep in the bone to overflow, thereby promoting articular cartilage defects or areas suitable for bone marrow stimulation. In layman's terms, it is a surgical method in which a hole is punched on the cartilage bone surface under the damaged area of ​​the articular surface cartilage, allowing bone marrow and blood containing bone marrow stem cells to overflow. These components form blood clots on the surface of the damaged cartilage, and then form fibrocartilage to repair the damaged area, thereby restoring the normal function of the joint or promoting tendon-bone healing and avoiding the occurrence of arthritis.

[0003] At present, the most commonly used surgical instrument for this operation is a microfracture cone. The front end of the microfracture cone is roughly straight or curved, and the rear of the microfracture cone is a handle. In addition, the microfracture cone can also include an auxiliary knocking rod. During the operation, the microfracture cone is pressed against the bone surface, and the handle or the auxiliary knocking rod is knocked to achieve the subchondral perforation operation.

[0004] Existing microfracture surgery has the following technical problems: 1. The front end of the microfracture cone is designed to be a cone or triangular cone, and the straight length of the cone line is about 3mm, which can only pierce the superficial bone surface.

[0005] 2. The front end of the microfracture cone needs to have a certain hardness to prevent deformation at the front bend during the tapping process, and it requires a larger diameter; however, the hole left by a large-diameter bone cone when drilling a hole in the bone surface is a larger conical hole, which can easily cause larger bone surface damage.

[0006] 3. The front end of the microfracture cone is designed to be a pointed cone or a triangular cone. The front end of the cone has no protective cover. The microfracture cone is a reusable tool. When cleaning and sterilizing, the tip of the cone is exposed on the outer surface and collides with other instruments, which will cause the tip of the cone to deform and become blunt. Summary of the invention

[0007] The purpose of the present invention is to provide a bone marrow stimulation cone system to solve the technical problems existing in the prior art such as large microfracture cone drilling diameter, low puncture depth, easy deformation of the front end of the cone and blunt mouth.

[0008] In order to achieve the above object, the present invention provides the following technical solutions: A bone marrow stimulation cone system, comprising a guide tube, a folded cone inner core and a handle; The head end of the guide tube is detachably fixedly connected to the handle, and the tail end of the guide tube has a bending portion; The handle is provided with a handle through hole; the handle through hole extends along the axial direction of the handle and is open at both ends; The guide tube is provided with a guide tube through hole; the guide tube through hole is open at both ends along the extension direction of the guide tube; the axis of the guide tube through hole at the head end of the guide tube is colinear with the axis of the handle through hole, and the angle between the axis of the guide tube through hole at the bending portion and the axis of the handle through hole is a bending angle; the bending angle is any angle between 0-90°; The folding cone inner core passes through the handle through hole and the guide tube through hole in sequence; the length of the folding cone inner core is greater than the sum of the lengths of the handle through hole and the guide tube through hole; The rigidity of the head end of the folding cone inner core is stronger than the rigidity of the tail end of the folding cone inner core; at least the tail end of the folding cone inner core is made of a flexible and resilient material.

[0009] In any of the above technical solutions, optionally, the bone marrow stimulation cone system further includes a positioning member; The handle is provided with a handle countersunk hole for inserting the guide tube; A positioning groove is provided on the outer peripheral wall of the head end of the guide tube; the positioning member passes through the handle and abuts against the guide tube, and part of the positioning member is accommodated in the positioning groove; The bending portion and the positioning groove are located on the same side of the guide tube.

[0010] In any of the above technical solutions, optionally, the guide tube includes a guide portion, a positioning portion and a locking cap; the head end of the guide portion is fixedly connected to the positioning portion, and the tail end of the guide portion is fixedly connected to the bending portion; the through hole of the guide tube sequentially passes through the positioning portion, the guide portion and the bending portion; At least part of the positioning portion is inserted into the handle countersunk hole, and the positioning groove is arranged on the positioning portion; The handle is provided with a handle threaded portion which is threadedly connected to the locking cap; The positioning portion is provided with an anti-dropping protrusion which prevents the locking cap from being detached from the positioning portion.

[0011] In any of the above technical solutions, optionally, the positioning portion includes a positioning matching portion and a positioning plug-in portion; the positioning matching portion, the anti-dropping protrusion and the positioning plug-in portion are fixedly connected in sequence; at least part of the positioning plug-in portion is plugged into the handle countersunk hole; The outer peripheral wall of the guide portion is provided with a guide boss; The positioning and matching portion is provided with a positioning and matching countersunk hole for inserting at least a portion of the guide portion, and the guide boss abuts against an opening of the positioning and matching countersunk hole; The locking cap is mounted on the positioning fitting portion and is configured to be movable between the guide boss and the anti-dropping protrusion.

[0012] In any of the above technical solutions, optionally, the locking cap comprises a locking cap through hole, a locking cap first countersunk hole and a locking cap threaded hole which are connected in sequence; The diameter of the lock cap through hole is larger than the outer diameter of the positioning matching portion, and the diameters of the lock cap first countersunk hole and the lock cap threaded hole are larger than the diameter of the lock cap through hole; The diameters of the first countersunk hole of the lock cap and the threaded hole of the lock cap are both larger than the outer diameter of the anti-dropout protrusion, and at least a portion of the anti-dropout protrusion can be accommodated in the first countersunk hole of the lock cap; The threaded hole of the lock cap is threadedly connected to the threaded portion of the handle; The locking cap further comprises a second countersunk hole of the locking cap; the first countersunk hole of the locking cap, the threaded hole of the locking cap and the second countersunk hole of the locking cap are connected in sequence; the aperture of the second countersunk hole of the locking cap is not less than the aperture of the threaded hole of the locking cap; The lock cap through hole, the lock cap first countersunk hole, the lock cap threaded hole and the lock cap second countersunk hole are coaxially arranged; The guide boss is welded to the positioning fitting portion at the opening of the positioning fitting counterbore.

[0013] In any of the above technical solutions, optionally, the bending portion is in a straight line, an arc line or a wavy line shape; The positioning portion is formed by integral mechanical processing; In any of the above technical solutions, optionally, the folding cone inner core includes a striking portion and a flexible bone cone portion; the tail end of the striking portion is fixedly connected to the head end of the flexible bone cone portion; the tail end of the flexible bone cone portion is a pointed end; The knocking part is located at the head end of the handle through hole, and the flexible bone cone part is located at the tail end of the guide tube through hole; the tail end of the flexible bone cone part is configured to extend out of the guide tube through hole when the knocking part is knocked; The rigidity of the striking part is stronger than that of the flexible bone cone part; and the flexible bone cone part is made of a flexible and resilient material.

[0014] In any of the above technical solutions, optionally, the flexible resilient material includes nickel-titanium alloy or heat-treated elastic stainless steel; The head end of the knocking part is provided with a knocking protrusion, and the tail end of the knocking part is provided with a knocking countersunk hole; the flexible bone cone part is inserted into the knocking countersunk hole; The flexible bone cone portion comprises a flexible bone cone body portion and a pricking portion connected to each other; one end of the pricking portion away from the flexible bone cone body portion is connected to the tip, and one end of the flexible bone cone body portion away from the pricking portion is inserted into the knocking countersunk hole; The tip is conical, the cross-sectional area of ​​the tip is not larger than the cross-sectional area of ​​the pricking portion, and the cross-sectional area of ​​the pricking portion is smaller than the cross-sectional area of ​​the flexible bone cone body; The outer wall of the knocking part is provided with at least one knocking groove at the knocking counterbore.

[0015] In any of the above technical solutions, optionally, the handle pin is connected with a lever buckle; A pressure elastic member is provided between the handle and the lever buckle; the pressure elastic member has elastic deformation to drive the lever buckle to reset; A knocking protrusion is arranged at the head end of the folding cone inner core; The head end of the lever buckle can abut against the head end of the handle, and is provided with a buckle through hole; the folded cone inner core passes through the buckle through hole and is inserted into the handle through hole; The knocking protrusion can abut against the lever buckle; The lever buckle is configured to, when pressed, drive the tail end of the lever buckle close to the handle, and at the same time drive the pressure elastic member to produce elastic deformation to restore the lever buckle, and drive the head end of the lever buckle away from the head end of the handle, thereby driving the knocking protrusion away from the handle.

[0016] In any of the above technical solutions, optionally, the handle is provided with a quick-connect marking structure and a positioning hole in sequence along its own axial direction; the positioning piece passes through the positioning hole and abuts against the guide tube; the quick-connect marking structure and the positioning hole are located on the same side of the handle.

[0017] The beneficial effects of the present invention are mainly: The bone marrow stimulation cone system provided by the present invention comprises a guide tube, a folding cone inner core and a handle; the guide tube head end is detachably fixedly connected with the handle so that guide tubes of different models can be replaced according to actual conditions, for example, guide tubes with different bending angles can be replaced; the folding cone inner core passes through the handle through hole of the handle and the guide tube through hole of the guide tube in sequence, that is, the folding cone inner core can be disposable and replaceable, and compared with the reusable microfracture cone in the prior art, its tip can always remain sharp, effectively avoiding the tip deformation and blunting phenomenon caused by the tip of the microfracture cone exposed to the outer surface during cleaning and sterilization and contact and collision with other instruments. The rigidity of the folding cone inner core head end is stronger than the rigidity of the folding cone inner core tail end, at least the folding cone inner core tail end is made of flexible and resilient material, and the guide tube and the folding cone inner core are replaceable, and the folding cone inner core of various specifications and depths can be used, which can be selected according to different parts, which can improve the entry of target bone marrow cells, and the folding cone inner core with a thinner diameter can be used, which can reduce the damage area of ​​the bone surface area, thereby reducing the damage to the subchondral bone plate.

[0018] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of the structure of a bone marrow stimulation cone system provided by an embodiment of the present invention; Figure 2 Another schematic diagram of the structure of the bone marrow stimulation cone system provided by an embodiment of the present invention; Figure 3 for Figure 2 Another state schematic diagram of the bone marrow stimulation cone system shown; Figure 4 for Figure 2 A cross-sectional view of the bone marrow stimulation cone system is shown (the inner core of the folded cone is not shown); Figure 5 for Figure 4 An enlarged view of region A of the myeloid stimulator cone system is shown; Figure 6 An exploded diagram of a bone marrow stimulation cone system provided by an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a guide tube provided in an embodiment of the present invention; Figure 8 for Figure 7 A cross-sectional view of the guide tube shown; Fig. 9 for Figure 8 An enlarged view of area B of the guide tube is shown; Fig.10 A schematic diagram of the structure of a guide portion provided by an embodiment of the present invention; Fig.11 for Fig.10 A right side view of the guide portion shown; Figure 12-16 A schematic diagram of the structure of a bending portion with different bending angles provided in an embodiment of the present invention; Fig.17 A schematic diagram of the structure of a positioning unit provided by an embodiment of the present invention; Fig.18 A schematic diagram of the structure of a locking cap provided in an embodiment of the present invention; Fig.19 A cross-sectional view of a locking cap provided in an embodiment of the present invention; Fig. 20 A schematic diagram of the structure of a folded cone inner core provided by an embodiment of the present invention; Fig.21 A schematic diagram of the structure of a handle provided by an embodiment of the present invention; Fig. 22 A cross-sectional view of a handle provided by an embodiment of the present invention; Fig.23 An exploded view of a handle provided by an embodiment of the present invention; Fig.24 A schematic diagram of the structure of a lever buckle provided in an embodiment of the present invention; Fig.25 A schematic diagram of the working principle of the bone marrow stimulation cone system provided by an embodiment of the present invention; Fig.26 and Fig. 27 Schematic diagram comparing the drilling of holes by the existing microfracture tool and the drilling of holes by the bone marrow stimulation cone system provided by the embodiment of the present invention.

[0021] Icons: 100-guide tube; 110-guide part; 120-positioning part; 130-locking cap; 140-bending part; 150-guide tube through hole; 1005-guide boss; 1009-positioning matching countersunk hole; 1010-positioning matching part; 1011-anti-slip protrusion; 1012-positioning plug-in part; 1013-positioning groove; 1015-locking cap through hole; 1016-locking cap first countersunk hole; 1017-locking cap second countersunk hole; 1018-locking cap threaded hole; 1021-welding seam; 200-folded cone inner core; 2002-knocking part; 2003-flexible bone cone part; 2004-knocking countersunk hole; 2005-knocking groove; 2006-tip; 2007-knocking protrusion; 2008-flexible bone cone body; 2009-needling part; 300-handle; 3002-handle threaded portion; 3003-annular groove; 3004-pin connection hole; 3005-handle countersunk hole; 3006-handle through hole; 3008-positioning hole; 3009-quick-connection marking structure; 400-lever buckle; 4004-buckling through hole; 500-pressure elastic part; 600-positioning part. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0024] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0025] The bone marrow stimulation cone system provided in this embodiment can be used in arthroscopic microfracture surgery.

[0026] See also Figure 1-Figure 27 As shown, the bone marrow stimulation cone system includes a guide tube 100 , a folded cone inner core 200 and a handle 300 .

[0027] The head end of the guide tube 100 is detachably fixedly connected to the handle 300 , and the tail end of the guide tube 100 has a bent portion 140 .

[0028] The handle 300 is provided with a handle through hole 3006 ; the handle through hole 3006 extends along the axial direction of the handle 300 and is open at both ends.

[0029] The guide tube 100 is provided with a guide tube through hole 150; the guide tube through hole 150 is open at both ends along the extension direction of the guide tube 100; the axis of the guide tube through hole 150 at the head end of the guide tube 100 is collinear with the axis of the handle through hole 3006, and the angle between the axis of the guide tube through hole 150 at the bending portion 140 and the axis of the handle through hole 3006 is the bending angle; the bending angle is any angle between 0-90°, such as Fig.10 As shown, the figure shows the bending angle of the bending portion 140. Optionally, the bending portion 140 is in a straight line, an arc line, a wavy line, or other shapes. In order to show the structure more clearly, Figure 12-Figure 15 The bending portion 140 and the guiding portion 110 of the guide tube 100 are separated by a dotted line; Figure 12-Figure 15 , the bending portion 140 is in a straight line shape, Fig.12 The bend angle shown is 0. Fig.13 The bending angle shown is 30°. Fig.14 The bending angle shown is 60°. Fig.15 The bending angle shown is 90°; Fig.16 As shown, the bending portion 140 is S-shaped.

[0030] The folding cone inner core 200 passes through the handle through hole 3006 and the guide tube through hole 150 in sequence; the length of the folding cone inner core 200 is greater than the sum of the lengths of the handle through hole 3006 and the guide tube through hole 150 .

[0031] The rigidity of the head end of the folding cone inner core 200 is stronger than the rigidity of the tail end of the folding cone inner core 200; at least the tail end of the folding cone inner core 200 is made of a flexible and resilient material. Optionally, the material of the head end of the folding cone inner core 200 is different from the material of the tail end of the folding cone inner core 200. Optionally, the flexible and resilient material includes nickel-titanium alloy or heat-treated elastic stainless steel or other materials. Since the folding cone inner core 200 needs to pass through a complex bending structure in actual application, its material is required to have excellent flexibility and bendability, and can accurately return to the initial state after being bent and deformed by force; in order to meet these performance requirements, at least the tail end of the folding cone inner core 200 needs to be made of a flexible and resilient material, such as nickel-titanium alloy or heat-treated elastic stainless steel or other materials. This type of material can change its shape under the action of external force by virtue of its unique crystal structure changes, and after the external force is eliminated, it can return to its original state through flexible and resilient properties, which perfectly meets the use requirements of the folding cone inner core 200. However, the head end of the folding cone inner core 200 also has the function of bearing the force of knocking, and needs to have high hardness, strength and impact resistance, so as to ensure that it will not be deformed or damaged during repeated knocking, and to ensure normal use function. Based on these characteristic requirements, the rigidity of the head end of the folding cone inner core 200 is required to be stronger than the rigidity of the tail end of the folding cone inner core 200. For example, the head end of the folding cone inner core 200 is made of stainless steel, especially high-strength medical stainless steel, so as to effectively resist the impact force.

[0032] The bone marrow stimulation cone system described in this embodiment includes a guide tube 100, a folded cone inner core 200 and a handle 300; the head end of the guide tube 100 is detachably and fixedly connected to the handle 300 so that different types of guide tubes 100 can be replaced according to actual conditions, such as replacing guide tubes 100 with different bending angles; the folded cone inner core 200 passes through the handle through hole 3006 of the handle 300 and the guide tube through hole 150 of the guide tube 100 in sequence, that is, the folded cone inner core 200 can be disposable and replaceable. Compared with the reusable microfracture cone in the prior art, its tip can always remain sharp, effectively avoiding the deformation and blunting of the tip due to the tip of the microfracture cone being exposed to the outer surface during cleaning and sterilization and contacting and colliding with other instruments. The rigidity of the front end of the folded cone inner core 200 is stronger than that of the rear end of the folded cone inner core 200, at least the rear end of the folded cone inner core 200 is made of flexible and resilient material, and the guide tube 100 and the folded cone inner core 200 are replaceable. The folded cone inner core 200 of various specifications and depths can be used and can be selected according to different parts, which can improve the entry of target bone marrow cells. The folded cone inner core 200 with a thinner diameter can be used to reduce the damage area of ​​the bone surface, thereby reducing the damage to the subchondral bone plate.

[0033] Compared to standard microfracture awl technology, the bone marrow stimulation awl system described in this embodiment destroys less bone surface area, allowing surgeons to place more holes in the defect than using microfracture awls. More holes means more stem cells can be released in the joint.

[0034] See also Figure 1-Figure 9 , Figure 21-23 As shown, in an optional solution of this embodiment, the bone marrow stimulation cone system also includes a positioning member 600.

[0035] The handle 300 is provided with a handle counterbore 3005 for inserting the guide tube 100, wherein the handle through hole 3006 passes through the handle counterbore 3005. Optionally, the handle through hole 3006 and the handle counterbore 3005 are coaxially arranged.

[0036] A positioning groove 1013 is provided on the outer peripheral wall of the front end of the guide tube 100; the positioning member 600 passes through the handle 300 and abuts against the guide tube 100, and a part of the positioning member 600 is accommodated in the positioning groove 1013. Fig. 22 As shown, the handle 300 is provided with a positioning hole 3008 communicating with the handle counterbore 3005 , and the positioning member 600 passes through the positioning hole 3008 to reach the positioning groove 1013 and abuts against the guide tube 100 .

[0037] The bending portion 140 and the positioning groove 1013 are located on the same side of the guide tube 100. By the positioning member 600 cooperating with the positioning groove 1013, and the bending portion 140 and the positioning groove 1013 being located on the same side of the guide tube 100, the guide tube 100 can be quickly inserted into the handle counterbore 3005 of the handle 300, which can effectively improve the correctness of the insertion direction of the guide tube 100.

[0038] Optionally, the positioning member 600 is a screw or a pin, or other parts.

[0039] See also Figure 1-Figure 9 , Figure 21-23 As shown, in an optional solution of this embodiment, the guide tube 100 includes a guide portion 110, a positioning portion 120 and a locking cap 130; the head end of the guide portion 110 is fixedly connected to the positioning portion 120, and the tail end of the guide portion 110 is fixedly connected to the bending portion 140; for example, the guide portion 110 and the positioning portion 120 are welded, and the guide portion 110 and the bending portion 140 are integrally formed. Optionally, the guide portion 110 and the positioning portion 120 are coaxially arranged.

[0040] The guide tube through hole 150 passes through the positioning portion 120 , the guide portion 110 and the bending portion 140 in sequence.

[0041] At least a portion of the positioning portion 120 is inserted into the handle counterbore 3005 , and the positioning groove 1013 is disposed on the positioning portion 120 .

[0042] Optionally, the handle 300 is provided with a handle threaded portion 3002 that is threadedly connected to the locking cap 130. By threading the locking cap 130 and the handle threaded portion 3002, the guide tube 100 can be quickly fixed to the handle 300 and the guide tube 100 can be quickly disassembled.

[0043] Optionally, the positioning portion 120 is provided with an anti-dropping protrusion 1011 for preventing the locking cap 130 from being separated from the positioning portion 120. The anti-dropping protrusion 1011 prevents the locking cap 130 from being separated from the positioning portion 120, thereby preventing the locking cap 130 from being separated from the guide tube 100.

[0044] Optionally, the guide portion 110 includes a hollow annular cylinder, and the positioning portion 120 includes a hollow annular cylinder.

[0045] Optionally, the bending portion 140 includes a bending section and a transition section; the transition section is connected between the guide portion 110 and the bending section; the transition section is a hollow annular cone, and the cross-sectional diameter of the transition section gradually expands until it is the same as the diameter of the guide portion 110.

[0046] See also Figure 7-Figure 19 As shown, in an optional scheme of this embodiment, the positioning portion 120 includes a positioning matching portion 1010 and a positioning plug-in portion 1012; the positioning matching portion 1010, the anti-drop protrusion 1011 and the positioning plug-in portion 1012 are fixedly connected in sequence; at least part of the positioning plug-in portion 1012 is plugged into the handle countersunk hole 3005.

[0047] The outer peripheral wall of the guide portion 110 is provided with a guide boss 1005. The positioning and matching portion 1010 is provided with a positioning and matching countersunk hole 1009 for inserting at least part of the guide portion 110, and the guide boss 1005 abuts against the opening of the positioning and matching countersunk hole 1009; the guide boss 1005 is used to limit the position of the guide portion 110 inserted into the positioning and matching countersunk hole 1009. The guide tube through hole 150 passes through the positioning and matching countersunk hole 1009. Optionally, the guide tube through hole 150 is coaxial with the positioning and matching countersunk hole 1009.

[0048] Optionally, the locking cap 130 is sleeved on the positioning matching portion 1010, and the locking cap 130 is configured to be movable between the guide boss 1005 and the anti-dropping protrusion 1011. Optionally, the locking cap 130 is clearance-matched with the positioning matching portion 1010. By arranging the locking cap 130 between the guide boss 1005 and the anti-dropping protrusion 1011, the locking cap 130 is prevented from being separated from the guide tube 100.

[0049] Optionally, the positioning portion 120 is formed by integral machining; that is, the positioning matching portion 1010, the anti-drop protrusion 1011 and the positioning plug-in portion 1012 are formed by integral machining.

[0050] See also Figure 5 , Fig. 9 , Fig.18 and Fig.19 As shown, in an optional solution of this embodiment, the locking cap 130 includes a locking cap through hole 1015, a locking cap first countersunk hole 1016 and a locking cap threaded hole 1018 that are connected in sequence. Optionally, the locking cap through hole 1015, the locking cap first countersunk hole 1016 and the locking cap threaded hole 1018 are coaxially arranged.

[0051] The diameter of the locking cap through hole 1015 is larger than the outer diameter of the positioning matching portion 1010 , so that the positioning matching portion 1010 can pass through the locking cap through hole 1015 .

[0052] The diameters of the first countersunk hole 1016 of the lock cap and the threaded hole 1018 of the lock cap are both larger than the diameter of the through hole 1015 of the lock cap.

[0053] The diameters of the first countersunk hole 1016 of the lock cap and the threaded hole 1018 of the lock cap are both larger than the outer diameter of the anti-dropout protrusion 1011, and at least a portion of the anti-dropout protrusion 1011 can be accommodated in the first countersunk hole 1016 of the lock cap. The diameters of the first countersunk hole 1016 of the lock cap and the threaded hole 1018 of the lock cap are both larger than the outer diameter of the anti-dropout protrusion 1011, so that the anti-dropout protrusion 1011 can be accommodated in the first countersunk hole 1016 of the lock cap.

[0054] The locking cap threaded hole 1018 is threadedly connected to the handle threaded portion 3002 ; the threaded connection helps the locking cap 130 to be quickly connected to the handle 300 , thereby helping the guide tube 100 to be quickly connected to the handle 300 .

[0055] Optionally, the locking cap 130 also includes a second locking cap countersunk hole 1017; the locking cap first countersunk hole 1016, the locking cap threaded hole 1018 and the locking cap second countersunk hole 1017 are connected in sequence; the aperture of the locking cap second countersunk hole 1017 is not less than the aperture of the locking cap threaded hole 1018; the locking cap second countersunk hole 1017 helps to guide the handle threaded portion 3002 to quickly enter the interior of the locking cap 130, thereby facilitating the locking cap 130 to quickly connect the handle 300.

[0056] Optionally, the locking cap through hole 1015 , the locking cap first countersunk hole 1016 , the locking cap threaded hole 1018 and the locking cap second countersunk hole 1017 are coaxially arranged.

[0057] Optionally, the guide boss 1005 is welded to the positioning matching portion 1010 at the opening of the positioning matching counterbore 1009; the welding seam 1021 is as shown in FIG. Fig. 9 shown.

[0058] See also Fig. 20As shown, in an optional scheme of this embodiment, the folded cone inner core 200 includes a striking portion 2002 and a flexible bone cone portion 2003; the tail end of the striking portion 2002 is fixedly connected to the head end of the flexible bone cone portion 2003; the tail end of the flexible bone cone portion 2003 is a tip 2006.

[0059] The knocking portion 2002 is located at the head end of the handle through hole 3006 , for example, the knocking portion 2002 is located outside the handle 300 .

[0060] The flexible bone cone 2003 is located at the tail end of the guide tube through hole 150; the tail end of the flexible bone cone 2003 is configured to be able to extend out of the guide tube through hole 150 when the knocking part 2002 is knocked, so that the tail end of the flexible bone cone 2003 can pierce the bone, thereby causing the cellular components deep in the bone to overflow.

[0061] Optionally, the rigidity of the striking portion 2002 is stronger than that of the flexible bone cone portion 2003. The fact that the rigidity of the striking portion 2002 is stronger than that of the flexible bone cone portion 2003 helps the striking portion 2002 to better transmit the striking force to the flexible bone cone portion 2003, which helps the flexible bone cone portion 2003 to puncture and perforate.

[0062] Optionally, the flexible bone cone 2003 is made of a flexible resilient material or other materials.

[0063] Optionally, the material of the striking portion 2002 is different from that of the flexible bone cone portion 2003. For example, the striking portion 2002 is made of stainless steel, especially high-strength medical stainless steel.

[0064] See also Fig. 20 As shown, in an optional scheme of this embodiment, a knocking protrusion 2007 is provided at the front end of the knocking part 2002, and a knocking countersunk hole 2004 is provided at the rear end of the knocking part 2002; the flexible bone cone part 2003 is inserted into the knocking countersunk hole 2004; optionally, the axis of the flexible bone cone part 2003 is colinear with the axis of the knocking countersunk hole 2004.

[0065] See also Fig. 20 As shown, in an optional scheme of this embodiment, the flexible bone cone portion 2003 includes a flexible bone cone body portion 2008 and a puncture portion 2009 that are connected to each other; the end of the puncture portion 2009 that is away from the flexible bone cone body portion 2008 is connected to the tip 2006, and the end of the flexible bone cone body portion 2008 that is away from the puncture portion 2009 is inserted into the knocking countersunk hole 2004.

[0066] Optionally, tip 2006 is conical or has other shapes.

[0067] Optionally, the cross-sectional area of ​​the tip 2006 is not greater than the cross-sectional area of ​​the puncture portion 2009 , for example, the cross-sectional area of ​​the tip 2006 gradually increases until it becomes the same as the cross-sectional area of ​​the puncture portion 2009 .

[0068] Optionally, the cross-sectional area of ​​the needling portion 2009 is not larger than the cross-sectional area of ​​the flexible bone cone body 2008; optionally, the cross-sectional area of ​​the needling portion 2009 is smaller than the cross-sectional area of ​​the flexible bone cone body 2008; by making the cross-sectional area of ​​the needling portion 2009 smaller than the cross-sectional area of ​​the flexible bone cone body 2008, the bone surface area destroyed by the needling portion 2009 can be effectively reduced, thereby reducing damage to the subchondral bone plate.

[0069] Optionally, the outer wall of the striking part 2002 is provided with at least one striking groove 2005 at the striking counterbore 2004. Optionally, there are multiple striking grooves 2005, and the multiple striking grooves 2005 are sequentially arranged along the axial direction of the striking part 2002. The striking grooves 2005 can effectively improve the connection firmness between the flexible bone cone body 2008 and the striking part 2002.

[0070] See also Figure 1-Figure 4 , Figure 21-24 As shown, in an optional solution of this embodiment, the handle 300 is pinned with a lever buckle 400. Optionally, the pinning through hole 3004 of the handle 300 pinned with the lever buckle 400 is located at the side of the head end of the handle 300.

[0071] A pressure elastic member 500 is provided between the handle 300 and the lever buckle 400; the pressure elastic member 500 has elastic deformation that drives the lever buckle 400 to return to its original position; for example, an external force presses the lever buckle 400 to reduce the distance between the handle 300 and the rear end of the lever buckle 400 so that the front end of the lever buckle 400 is away from the front end of the handle 300; after the external force is removed, the elastic deformation of the pressure elastic member 500 can drive the lever buckle 400 to return to its original position.

[0072] In some embodiments, a knocking protrusion 2007 is provided at the head end of the folding cone inner core 200 .

[0073] In some embodiments, the head end of the lever buckle 400 can abut against the head end of the handle 300, and the lever buckle 400 is provided with a buckle through hole 4004; the folding cone inner core 200 passes through the buckle through hole 4004 and is inserted into the handle through hole 3006, and is inserted into the guide tube through hole 150; In some embodiments, the knocking protrusion 2007 can abut against the lever buckle 400; for example, when the knocking protrusion 2007 is knocked by external force, it can abut against the lever buckle 400, so that the tail end of the flexible bone cone 2003 extends out of the guide tube through hole 150, that is, the tip 2006 and at least part of the puncture portion 2009 extend out of the guide tube through hole 150 and puncture the bone, thereby allowing the cellular components deep in the bone to overflow.

[0074] In some embodiments, when the lever buckle 400 is pressed by an external force, it is configured to drive the tail end of the lever buckle 400 close to the handle 300, while driving the pressure elastic member 500 to produce elastic deformation to restore the lever buckle 400, and driving the head end of the lever buckle 400 away from the head end of the handle 300, thereby driving the knocking protrusion 2007 away from the handle 300.

[0075] like Figure 1 As shown, optionally, the handle 300 is sequentially provided with a quick-connect marking structure 3009 and a positioning hole 3008 along its own axial direction; the positioning member 600 passes through the positioning hole 3008 and abuts against the guide tube 100; the quick-connect marking structure 3009 and the positioning hole 3008 are located on the same side of the handle 300. The quick-connect marking structure 3009 facilitates the guide tube 100 to be quickly plugged into the handle counterbore 3005 of the handle 300, which can effectively improve the correctness of the plugging direction of the guide tube 100.

[0076] Optionally, the quick-connect mark structure 3009 is, for example, a groove or a protrusion. Optionally, the shape of the quick-connect mark structure 3009 is, for example, an arrow shape or other shapes.

[0077] Optionally, the buckle through hole 4004 is a long hole.

[0078] Optionally, the pressure elastic member 500 is a spring or other elastic member. Optionally, the handle 300 is provided with a groove for accommodating at least part of the pressure elastic member 500 .

[0079] like Fig.21 As shown, optionally, a plurality of annular grooves 3003 are provided in the middle of the handle 300 ; the annular grooves 3003 are used to facilitate grasping of the handle 300 .

[0080] In order to more clearly understand the bone marrow stimulation cone system described in this embodiment, the working principle is briefly described below: like Fig.25As shown, when the bone marrow stimulation cone system is needed, the folding cone inner core 200 is placed in the handle through hole 3006 of the handle 300 and the guide tube through hole 150 of the guide tube 100, the tail end of the guide tube 100 is close to the target bone surface, an axial force is applied (the axial force applied only assists in holding the guide tube 100 without shaking) to contact the bone surface, and the head end of the folding cone inner core 200 is struck at a uniform speed with a bone hammer (specifically, the striking protrusion 2007 is struck at a uniform speed with a bone hammer) to make the folding cone inner core 200 enter the bone, and when the head end of the folding cone inner core 200 completely contacts the head end of the handle 300, it stops (at this time, the striking protrusion 2007 abuts against the head end of the handle 300), and the lever buckle 400 is held with one hand, and the folding cone inner core 200 is tilted upward by the lever principle. The microfracture hole is established.

[0081] The bone marrow stimulation cone system described in this embodiment can be operated with one hand to quickly and conveniently tilt the folding cone inner core 200, and can also quickly connect and position the replacement guide tube 100, and can control different drilling depths by replacing the folding cone inner core 200. Fig.26 and Fig. 27 As shown, the holes punched by the existing microfracture tool are compared with the holes punched by the bone marrow stimulation cone system described in the present embodiment. It can be seen that the bone holes punched by the bone marrow stimulation cone system described in the present embodiment have a smaller hole diameter and a deeper hole depth, which is more conducive to the overflow of bone marrow stem cells; for example, the holes formed by punching with the existing microfracture tool are the existing holes, and the holes formed by punching with the bone marrow stimulation cone system described in the present embodiment are the holes of the present embodiment. It can be seen from the figure that the existing holes are triangular, with a larger hole mouth and a shallower hole depth; the holes of the present embodiment are similar to a cylindrical shape with a pointed bottom, and have a smaller hole diameter. For example, the hole diameter of the hole of the present embodiment is 40%-70% of the hole diameter of the existing hole, such as the hole diameter of the hole of the present embodiment is 40%, 50%, 60%, 65% or 70% of the hole diameter of the existing hole, etc.; the hole depth of the hole of the present embodiment is deeper, for example, the hole depth of the hole of the present embodiment is 2 times to 4 times the hole depth of the existing hole, such as the hole depth of the hole of the present embodiment is 2 times, 2.5 times or 4 times the hole depth of the existing hole, etc. For example, when using the existing microfracture cone (model L540486) produced by Smith & Nephew Inc., Endoscopy Division, the hole opening is 1.5mm-2mm and the hole depth is 3mm-5mm. When using the bone marrow stimulation cone system described in this embodiment to make holes, the hole opening is 1mm and the hole depth is 10mm-15mm. The bone holes made by the bone marrow stimulation cone system described in this embodiment have a smaller hole diameter and a deeper hole depth, which is more conducive to the overflow of bone marrow stem cells.

[0082] The above description is only a preferred 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 replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bone marrow stimulation cone system, characterized in that, It comprises a guide tube (100), a folding cone inner core (200) and a handle (300); The head end of the guide tube (100) is detachably fixedly connected to the handle (300), and the tail end of the guide tube (100) has a bent portion (140); The handle (300) is provided with a handle through hole (3006); the handle through hole (3006) extends along the axial direction of the handle (300) and is open at both ends; The guide tube (100) is provided with a guide tube through hole (150); the guide tube through hole (150) is open at both ends along the extension direction of the guide tube (100); the axis of the guide tube through hole (150) at the head end of the guide tube (100) is colinear with the axis of the handle through hole (3006), and the angle between the axis of the guide tube through hole (150) at the bending portion (140) and the axis of the handle through hole (3006) is the bending angle; the bending angle is any angle between 0° and 90°; The folding cone inner core (200) passes through the handle through hole (3006) and the guide tube through hole (150) in sequence; the length of the folding cone inner core (200) is greater than the sum of the lengths of the handle through hole (3006) and the guide tube through hole (150); The rigidity of the head end of the folding cone inner core (200) is stronger than the rigidity of the tail end of the folding cone inner core (200); at least the tail end of the folding cone inner core (200) is made of a flexible and resilient material.

2. The bone marrow stimulation cone system according to claim 1, characterized in that: Also includes a positioning member (600); The handle (300) is provided with a handle countersunk hole (3005) for plugging the guide tube (100); A positioning groove (1013) is provided on the outer peripheral wall of the head end of the guide tube (100); the positioning member (600) passes through the handle (300) and abuts against the guide tube (100), and a portion of the positioning member (600) is accommodated in the positioning groove (1013); The bending portion (140) and the positioning groove (1013) are located on the same side of the guide tube (100).

3. The bone marrow stimulation cone system according to claim 2, characterized in that: The guide tube (100) comprises a guide portion (110), a positioning portion (120) and a locking cap (130); the head end of the guide portion (110) is fixedly connected to the positioning portion (120), and the tail end of the guide portion (110) is fixedly connected to the bending portion (140); the guide tube through hole (150) passes through the positioning portion (120), the guide portion (110) and the bending portion (140) in sequence; At least a portion of the positioning portion (120) is inserted into the handle countersunk hole (3005), and the positioning groove (1013) is arranged on the positioning portion (120); The handle (300) is provided with a handle threaded portion (3002) threadedly connected to the locking cap (130); The positioning portion (120) is provided with an anti-detachment protrusion (1011) for preventing the locking cap (130) from detaching from the positioning portion (120).

4. The bone marrow stimulation cone system according to claim 3, characterized in that: The positioning portion (120) comprises a positioning matching portion (1010) and a positioning plug-in portion (1012); the positioning matching portion (1010), the anti-drop protrusion (1011) and the positioning plug-in portion (1012) are fixedly connected in sequence; at least a portion of the positioning plug-in portion (1012) is plugged into the handle countersunk hole (3005); The outer peripheral wall of the guide portion (110) is provided with a guide boss (1005); The positioning matching portion (1010) is provided with a positioning matching countersunk hole (1009) for inserting at least a portion of the guide portion (110), and the guide boss (1005) abuts against the opening of the positioning matching countersunk hole (1009); The locking cap (130) is sleeved on the positioning matching portion (1010) and is configured to be able to move between the guide boss (1005) and the anti-slip protrusion (1011).

5. The bone marrow stimulation cone system according to claim 4, characterized in that: The locking cap (130) comprises a locking cap through hole (1015), a locking cap first countersunk hole (1016) and a locking cap threaded hole (1018) which are connected in sequence; The diameter of the lock cap through hole (1015) is larger than the outer diameter of the positioning matching portion (1010), and the diameters of the lock cap first countersunk hole (1016) and the lock cap threaded hole (1018) are both larger than the diameter of the lock cap through hole (1015); The diameters of the first countersunk hole (1016) of the lock cap and the threaded hole (1018) of the lock cap are both larger than the outer diameter of the anti-dropout protrusion (1011), and at least a portion of the anti-dropout protrusion (1011) can be accommodated in the first countersunk hole (1016) of the lock cap; The locking cap threaded hole (1018) is threadedly connected to the handle threaded portion (3002); The locking cap (130) further comprises a second locking cap countersunk hole (1017); the first locking cap countersunk hole (1016), the locking cap threaded hole (1018) and the second locking cap countersunk hole (1017) are sequentially connected; the aperture of the second locking cap countersunk hole (1017) is not less than the aperture of the locking cap threaded hole (1018); The lock cap through hole (1015), the lock cap first countersunk hole (1016), the lock cap threaded hole (1018) and the lock cap second countersunk hole (1017) are coaxially arranged; The guide boss (1005) is welded to the positioning matching portion (1010) at the opening of the positioning matching countersunk hole (1009).

6. The bone marrow stimulation cone system according to claim 3, characterized in that: The bending portion (140) is in a straight line shape, an arc line shape, or a wavy line shape; The positioning portion (120) is formed by integral mechanical processing.

7. The bone marrow stimulation cone system according to claim 1, characterized in that: The folding cone inner core (200) comprises a striking portion (2002) and a flexible bone cone portion (2003); the tail end of the striking portion (2002) is fixedly connected to the head end of the flexible bone cone portion (2003); the tail end of the flexible bone cone portion (2003) is a tip (2006); The knocking portion (2002) is located at the head end of the handle through hole (3006), and the flexible bone cone portion (2003) is located at the tail end of the guide tube through hole (150); the tail end of the flexible bone cone portion (2003) is configured to be able to extend out of the guide tube through hole (150) when the knocking portion (2002) is knocked; The rigidity of the striking portion (2002) is stronger than that of the flexible bone cone portion (2003); and the flexible bone cone portion (2003) is made of a flexible and resilient material.

8. The bone marrow stimulation cone system according to claim 7, characterized in that: The head end of the knocking part (2002) is provided with a knocking protrusion (2007), and the tail end of the knocking part (2002) is provided with a knocking countersunk hole (2004); the flexible bone cone part (2003) is inserted into the knocking countersunk hole (2004); The flexible bone cone portion (2003) comprises a flexible bone cone body portion (2008) and a pricking portion (2009) which are connected to each other; one end of the pricking portion (2009) which faces away from the flexible bone cone body portion (2008) is connected to the tip (2006), and one end of the flexible bone cone body portion (2008) which faces away from the pricking portion (2009) is inserted into the knocking counterbore (2004); The tip (2006) is conical, the cross-sectional area of ​​the tip (2006) is not larger than the cross-sectional area of ​​the pricking portion (2009), and the cross-sectional area of ​​the pricking portion (2009) is smaller than the cross-sectional area of ​​the flexible bone cone body (2008); The outer wall of the knocking portion (2002) is provided with at least one knocking groove (2005) at the knocking counterbore (2004).

9. The bone marrow stimulation cone system according to claim 2, characterized in that: The handle (300) is pin-connected with a lever buckle (400); A pressure elastic member (500) is provided between the handle (300) and the lever buckle (400); the pressure elastic member (500) has elastic deformation that drives the lever buckle (400) to return to its original position; A knocking protrusion (2007) is provided at the head end of the folding cone inner core (200); The head end of the lever buckle (400) is capable of abutting against the head end of the handle (300), and is provided with a buckle through hole (4004); the folding cone inner core (200) passes through the buckle through hole (4004) and is inserted into the handle through hole (3006); The knocking protrusion (2007) is capable of abutting against the lever buckle (400); The lever buckle (400) is configured to, when pressed, drive the rear end of the lever buckle (400) close to the handle (300), and at the same time drive the pressure elastic member (500) to produce elastic deformation to reset the lever buckle (400), and drive the head end of the lever buckle (400) away from the head end of the handle (300), thereby driving the knocking protrusion (2007) away from the handle (300).

10. The bone marrow stimulation cone system according to claim 9, characterized in that: The handle (300) is provided with a quick-connect marking structure (3009) and a positioning hole (3008) in sequence along its axial direction; the positioning member (600) passes through the positioning hole (3008) and abuts against the guide tube (100); the quick-connect marking structure (3009) and the positioning hole (3008) are located on the same side of the handle (300).

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