Bone cement medicine-carrying cannula

Abstract

The utility model relates to the technical field of infection treatment after a fracture intramedullary nail operation, and provides a bone cement medicine-carrying sleeve which comprises a first half tube. The second half tube is used for forming bone cement after the first half tube and the second half tube are combined; the two first plugs are correspondingly arranged at the two ends of the first half tube, and each first plug is provided with a first wire passing hole; the two second plugs are correspondingly arranged at the two ends of the second half tube, each second plug is provided with a second wire passing hole, after the first half tube and the second half tube are combined, the first wire passing hole and the second wire passing hole are driven to be combined, and the first wire passing hole and the second wire passing hole are used for centering the titanium wire. By means of the technical scheme, the problem that in the prior art, the position of the titanium wire in the bone cement sleeve is not accurate is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fracture intramedullary nail postoperative infection treatment, specifically, a bone cement drug loading sleeve. BACKGROUND

[0002] The bone cement rod is applied to tibial, humeral, femoral intramedullary nail postoperative infection: after debridement operation, the bone cement sleeve can be used for assisting preparation of the bone cement rod for drug loading and dead cavity packing, temporary fixation of fracture ends and infection control.

[0003] The bone cement rod preparation device is a medical instrument, which is used for filling preparation when intramedullary nail is infected after orthopedic surgery and intramedullary infection is treated. The bone cement rod preparation device accurately controls the uniformity of the thickness of the bone cement rod and ensures that the surface of the bone cement rod is smooth, so that the bone cement rod can be smoothly inserted into the medullary cavity. The bone cement rod can be placed with 1-2 3.mm Kirschner wires, which plays a supporting role for unhealed fractures. The bone cement rod can be placed with 0.8mm double helix interlocking titanium wires, the titanium wires are kept in the middle of the bone cement rod, and the titanium wires are exposed by about 2-3cm at one end of the bone cement, so as to facilitate the removal of the bone cement rod in the later period, and the titanium wires can prevent the bone cement rod from breaking and falling into the medullary cavity to form a foreign body.

[0004] The traditional bone cement forming principle is: self-made mold (sleeve), that is, two half pipe grooves (hollow recesses) are connected by a hinge in the middle, the two half pipe grooves are filled with bone cement, a Kirschner wire is placed on one side, and a titanium wire is placed on the other side, the tail end of the titanium wire is exposed outside the mold, the two half pipe grooves are closed through the hinge, after the bone cement is completely hardened, the two half pipe grooves are opened, the bone cement rod is taken out, and the excess bone cement at the butt joint of the two sides of the bone cement rod is removed, so that the bone cement rod is smoother.

[0005] If the position of the titanium wire in the bone cement is not accurate, the overall strength and service life of the bone cement drug loading structure will be reduced. The traditional self-made mold is not convenient to open and close and inject bone cement, and the bone cement is easy to overflow from both ends of the self-made mold, which not only causes material waste, but also affects the appearance and quality of the formed bone cement. UTILITY MODEL CONTENTS

[0006] The utility model provides a bone cement drug loading sleeve, solve the problem that the titanium wire is not accurate in the bone cement sleeve in the related technical field.

[0007] The technical scheme of the utility model is as follows:

[0008] A bone cement drug loading sleeve comprises:

[0009] A first half pipe;

[0010] A second half pipe, the first half pipe and the second half pipe are combined to form bone cement;

[0011] a first end cap, having two, corresponding to be arranged at two ends of the first half pipe, the first end cap having a first wire hole;

[0012] a second end cap, having two, corresponding to be arranged at two ends of the second half pipe, the second end cap having a second wire hole, the first wire hole and the second wire hole being combined after the first half pipe and the second half pipe being combined, the first wire hole and the second wire hole being used for centering the titanium wire.

[0013] Optionally, the first wire hole has a diameter larger than that of the titanium wire, and the device further comprises:

[0014] a screw rod, being rotatably arranged on the first end cap, the screw rod being capable of being extended into or moved out of the first wire hole after being rotated, the screw rod being capable of centering the titanium wire in cooperation with the second wire hole after being extended into the first wire hole.

[0015] Optionally, the second wire hole has a diameter equal to that of the titanium wire.

[0016] Optionally, the first half pipe, the second half pipe, the first end cap and the second end cap are all semicircular structures.

[0017] Optionally, the device further comprises:

[0018] a hinge, one end of the hinge being arranged on the first half pipe and the other end of the hinge being arranged on the second half pipe, the first half pipe and the second half pipe being capable of being combined or separated through the hinge.

[0019] Optionally, the device further comprises:

[0020] a plurality of clamping members, the clamping members having clamping spaces, the clamping spaces being used for clamping the combined first half pipe and the second half pipe.

[0021] Optionally, the device further comprises:

[0022] a rotating shaft;

[0023] the clamping members comprise:

[0024] a first arc-shaped clamping piece, being rotatably arranged on the rotating shaft;

[0025] a second arc-shaped clamping piece, being rotatably arranged on the rotating shaft, the first arc-shaped clamping piece and the second arc-shaped clamping piece forming the clamping spaces, the first arc-shaped clamping piece and the second arc-shaped clamping piece being capable of increasing or reducing the clamping spaces after being rotated.

[0026] Optionally, the first arc-shaped clamping piece has a clamping groove, and the device further comprises:

[0027] A rotating column is rotatably arranged at one end of the second arc-shaped clamping piece, and the other end of the rotating column has a clamping protrusion for clamping into the clamping groove.

[0028] Optionally, the rotating shaft is located between the hinge and the first half pipe and the second half pipe after the first half pipe and the second half pipe are combined.

[0029] The working principle and beneficial effects of the present application are as follows:

[0030] In the present application, two first plugs are respectively arranged at two ends of the first half pipe, and two second plugs are respectively arranged at two ends of the second half pipe. When the first half pipe and the second half pipe are separated, the first half pipe and the second half pipe are filled with unhardened bone cement, and titanium wire is placed in the first wire passing hole or the second wire passing hole. The first half pipe and the second half pipe are combined together, and at this time, the first wire passing hole and the second wire passing hole are also combined. The combined first wire passing hole and second wire passing hole make the titanium wire be in the center position of the sleeve pipe.

[0031] The design of the first half pipe and the second half pipe facilitates opening and closing, and is beneficial to the injection and molding operation of bone cement. The combined first wire passing hole and second wire passing hole can make the titanium wire be in the center, ensure the position accuracy of the titanium wire in the bone cement, and improve the stability of the bone cement drug loading structure. The design of the first plug and the plug can prevent the bone cement from overflowing outside the two ends of the first half pipe and the second half pipe. BRIEF DESCRIPTION OF DRAWINGS

[0032] The above features, technical characteristics, advantages and implementation modes of the present application will be further described in the following preferred embodiments in a clear and understandable manner combined with the drawings.

[0033] Figure 1 Fig. 1 is a schematic diagram of the separation structure of the first half pipe and the second half pipe of the present application;

[0034] Figure 2 Fig. 2 is an enlarged schematic diagram of A in Fig. 1; Figure 1

[0035] Figure 3 Fig. 3 is a schematic diagram of the combination structure of the first half pipe and the second half pipe of the present application;

[0036] Figure 4 Fig. 4 is an enlarged schematic diagram of B in Fig. 3; Figure 3

[0037] Figure 5 Fig. 5 is a schematic diagram of the clamping piece structure of the present application;

[0038] Figure 6 Fig. 6 is an enlarged schematic diagram of C in Fig. 5; Figure 5

[0039] ​​​Figure 7 It is a structural schematic view of the utility model.

[0040] In the drawing: 1, first half pipe, 2, second half pipe, 3, first plug, 31, first wire hole, 4, second plug, 41, second wire hole, 5, screw rod, 6, hinge, 7, clamping piece, 71, clamping space, 8, rotating shaft, 72, first arc clamping piece, 73, second arc clamping piece, 721, clamping groove, 9, rotating column, 91, clamping protrusion. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the specific implementation of the utility model will be described below with reference to the drawings. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, without creative labor, further technical solutions can be understood, and in some drawings, only one of the components with the same structure or function is schematically shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this paper, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second" and the like are only used for differentiation and description, and cannot be understood as indicating or implying relative importance.

[0044] Reference Figures 1-7 For the first embodiment of the utility model, a bone cement drug-loaded sleeve is proposed, which comprises a first half pipe 1, a first half pipe 1 and a second half pipe 2 are combined to form a bone cement, the first plug 3 has two, which are correspondingly arranged at both ends of the first half pipe 1, the first plug 3 has a first wire hole 31, the second plug 4 has two, which are correspondingly arranged at both ends of the second half pipe 2, the second plug 4 has a second wire hole 41, the first half pipe 1 and the second half pipe 2 are combined to drive the first wire hole 31 and the second wire hole 41 to combine, and the first wire hole 31 and the second wire hole 41 are used to center the titanium wire.

[0045] In this embodiment, two first plugs 3 are respectively installed at the two ends of the first half pipe 1, and two second plugs 4 are respectively installed at the two ends of the second half pipe 2. When the first half pipe 1 and the second half pipe 2 are separated, the first half pipe 1 and the second half pipe 2 are filled with uncured bone cement, and then the titanium wire is placed in the first wire passing hole 31 or the second wire passing hole 41, and the first half pipe 1 and the second half pipe 2 are combined together, at this time, the first wire passing hole 31 and the second wire passing hole 41 are also combined. The combined first wire passing hole 31 and the second wire passing hole 41 make the titanium wire in the center position of the sleeve.

[0046] The design of the first half pipe 1 and the second half pipe 2 facilitates opening and closing, and is beneficial to the injection and molding operation of the bone cement. The combined first wire passing hole 31 and the second wire passing hole 41 can center the titanium wire, ensure the position of the titanium wire in the bone cement, and improve the stability of the bone cement drug-loaded structure. Moreover, the design of the first plug 3 and the plug can prevent the bone cement from overflowing outside the two ends of the first half pipe 1 and the second half pipe 2.

[0047] Further, the diameter of the first wire passing hole 31 is greater than the diameter of the titanium wire, and further comprising a screw rod 5, which is rotationally arranged on the first plug 3. After the screw rod 5 is rotated and extended into or moved out of the first wire passing hole 31, the screw rod 5 is extended into the first wire passing hole 31 and cooperates with the second wire passing hole 41 to center the titanium wire.

[0048] In this embodiment, the screw rod 5 is rotationally arranged on the first plug 3. After the first wire passing hole 31 and the second wire passing hole 41 are combined, the screw rod 5 is rotated and extended into the first wire passing hole 31, the titanium wire is extruded, the titanium wire is in contact with the second wire passing hole 41, and the titanium wire is in the center position. The diameter of the first wire passing hole 31 is greater than the diameter of the titanium wire, which is convenient for operation, so that the titanium wire can accurately enter the first wire passing hole 31, and the fault tolerance is increased. The screw rod 5 can further limit the titanium wire, prevent the titanium wire from moving during the molding process of the bone cement, and improve the reliability of the bone cement drug-loaded structure.

[0049] The diameter of the first wire passing hole 31 is greater than the diameter of the titanium wire, which is convenient for the titanium wire to pass in, and the adjustment function of the screw rod 5 can adapt to the limiting needs of titanium wires of different thicknesses.

[0050] Further, the diameter of the second wire passing hole 41 is equal to the diameter of the titanium wire.

[0051] In this embodiment, the diameter of the second wire passing hole 41 is equal to the diameter of the titanium wire. After the first wire passing hole 31 and the second wire passing hole 41 are combined, the titanium wire is positioned by the extrusion of the screw rod 5 and the limiting of the second wire passing hole 41, and is exactly located in the center.

[0052] The diameter of the second wire passing hole 41 is equal to the diameter of the titanium wire, which can accurately position the titanium wire, cooperate with the first wire passing hole 31, and further improve the centering accuracy of the titanium wire in the sleeve.

[0053] Further, the first half pipe 1, the second half pipe 2, the first plug 3 and the second plug 4 are all semicircular structures.

[0054] In this embodiment, the first plug 3 and the second plug 4 are both semicircular structures, and when the first half pipe 1 and the second half pipe 2 are combined, the straight edges of the first plug 3 and the second plug 4 are combined exactly, completely sealing the two ends of the circular cavity formed by combining the first half pipe 1 and the second half pipe 2, making the two ends of the formed bone cement more flat, and eliminating the need for later processing.

[0055] Further, the hinge 6 is arranged at one end of the first half pipe 1 and at the other end of the second half pipe 2, and the first half pipe 1 and the second half pipe 2 are combined or separated through the hinge 6. The clamping piece 7 has a plurality of clamping spaces 71, which are used to clamp the combined first half pipe 1 and the second half pipe 2.

[0056] In this embodiment, the hinge 6 is used to combine the first half pipe 1 and the second half pipe 2. The clamping spaces 71 of the plurality of clamping pieces 7 are aligned with the combined first half pipe 1 and the second half pipe 2, and clamping is performed to make the two tightly combined, preventing the first half pipe 1 and the second half pipe 2 from accidentally separating after the bone cement is not completely solidified.

[0057] The clamping piece 7 can enhance the stability of the combined first half pipe 1 and the second half pipe 2, prevent them from separating during the injection of bone cement or other operations, and ensure the forming effect of the bone cement.

[0058] Further, the first arc-shaped clamping piece 72 is rotationally arranged on the rotating shaft 8, and the second arc-shaped clamping piece 73 is rotationally arranged on the rotating shaft 8. The first arc-shaped clamping piece 72 and the second arc-shaped clamping piece 73 form the clamping space 71, and after being rotated, they are used to increase or decrease the clamping space 71.

[0059] In this embodiment, the first arc-shaped clamping piece 72 and the second arc-shaped clamping piece 73 are rotationally arranged on the rotating shaft 8 to form the clamping space 71. The first arc-shaped clamping piece 72 and the second arc-shaped clamping piece 73 are rotated to increase the clamping space 71, and then they are sleeved on the combined first half pipe 1 and the second half pipe 2. After being rotated again, the clamping space 71 is decreased to realize clamping.

[0060] The first arc-shaped clamping piece 72 and the second arc-shaped clamping piece 73 can be rotationally adjusted to change the size of the clamping space 71, which can adapt to the clamping needs of first half pipes 1 and second half pipes 2 of different sizes, and improve the versatility of the clamping piece 7.

[0061] Further, the first arc-shaped clamping piece 72 has a clamping groove 721, one end of the rotating column 9 is rotationally arranged on the second arc-shaped clamping piece 73, and the other end of the rotating column 9 has a clamping protrusion 91 which is used to be clamped into the clamping groove 721.

[0062] In this embodiment, one end of the rotating column 9 is rotatably arranged on the second arc-shaped clamping piece 73. After the first half pipe 1 and the second half pipe 2 are clamped and combined with the first arc-shaped clamping piece 72 and the second arc-shaped clamping piece 73, the rotating column 9 is rotated, and the clamping protrusion 91 is clamped into the clamping groove 721 of the first arc-shaped clamping piece 72. The cooperation of the clamping protrusion 91 and the clamping groove 721 can further fix the relative position of the first arc-shaped clamping piece 72 and the second arc-shaped clamping piece 73, enhance the clamping effect of the clamping piece 7, and prevent the clamping piece 7 from loosening.

[0063] Further, after the first half pipe 1 and the second half pipe 2 are combined, the rotating shaft 8 is located between the hinge 6 and the first half pipe 1 and the second half pipe 2.

[0064] In this embodiment, such position arrangement facilitates the operation and installation of the clamping piece 7, and meanwhile, when not in use, the first half pipe 1, the second half pipe 2 and the clamping piece 7 can form an integral whole, preventing the loss of parts.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application. They should be covered in the scope of the claims of the present application.

Claims

1. A drug-loaded cannula for bone cement, characterized in that It includes: The first half pipe (1); The second half pipe (2), the first half pipe (1) and the second half pipe (2) are combined to form a bone cement; The first plug (3) has two, corresponding to the two ends of the first half pipe (1), the first plug (3) has a first wire hole (31); The second plug (4) has two, corresponding to the two ends of the second half pipe (2), the second plug (4) has a second wire hole (41), the first wire hole (31) and the second wire hole (41) are combined after the first half pipe (1) and the second half pipe (2) are combined, the first wire hole (31) and the second wire hole (41) are used to center the titanium wire.

2. A drug-loaded cannula for bone cement according to claim 1, characterized in that The diameter of the first wire hole (31) is greater than the diameter of the titanium wire, and the first wire hole (31) further includes: The screw rod (5) is rotatably arranged on the first plug (3), and the screw rod (5) extends into or moves out of the first wire hole (31) after rotation, and the screw rod (5) extends into the first wire hole (31) and cooperates with the second wire hole (41) to center the titanium wire.

3. A drug-loaded cannula for bone cement according to claim 1, characterized in that The diameter of the second wire hole (41) is equal to the diameter of the titanium wire.

4. The drug-loaded cannula for bone cement according to claim 1, wherein The first half pipe (1), the second half pipe (2), the first plug (3) and the second plug (4) are all semicircular structures.

5. The drug-loaded cannula for bone cement according to claim 1, wherein It also includes: The hinge (6) is arranged at one end of the first half pipe (1) and the other end of the second half pipe (2), and the first half pipe (1) and the second half pipe (2) are combined or separated through the hinge (6).

6. A drug-loaded cannula for bone cement according to claim 5, characterized in that It also includes: The clamping piece (7) has several, the clamping piece (7) has a clamping space (71), and the clamping space (71) is used for clamping the first half pipe (1) and the second half pipe (2) after combination.

7. A drug-loaded cannula for bone cement according to claim 6, characterized in that It also includes: The rotating shaft (8); The clamping piece (7) includes: The first arc-shaped clamping piece (72) is rotatably arranged on the rotating shaft (8); The second arc-shaped clamping piece (73) is rotatably arranged on the rotating shaft (8), the first arc-shaped clamping piece (72) and the second arc-shaped clamping piece (73) form the clamping space (71), and the first arc-shaped clamping piece (72) and the second arc-shaped clamping piece (73) are used to increase or reduce the clamping space (71) after rotation.

8. A drug-loaded cannula for bone cement according to claim 7, characterized in that The first arc-shaped clamping piece (72) has a clamping groove (721), and the first arc-shaped clamping piece (72) further includes: The rotating column (9) is rotatably arranged at one end of the second arc-shaped clamping piece (73), and the other end of the rotating column (9) has a clamping protrusion (91), and the clamping protrusion (91) is used for clamping into the clamping groove (721).

9. A drug-loaded cannula for bone cement according to claim 7, characterized in that After the first half pipe (1) and the second half pipe (2) are combined, the rotating shaft (8) is located between the hinge (6) and the first half pipe (1) and the second half pipe (2).

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