CN211325516U - Bone cement filling device - Google Patents

Abstract

The utility model relates to a bone cement filling device. The technical scheme is as follows: the bone cement filling device comprises an inner catheter, wherein a mud injection hole communicated with the inner cavity of the inner catheter is formed in the side wall of the inner catheter, and the mud injection hole is located at the bone cement extrusion end of the inner catheter. Bone cement's extrusion end be on the inner catheter with pocket complex one end to have a mud port, because only this a mud port can make the place ahead resistance when pouring into cement into the pocket lead to greatly filling inhomogeneous, consequently offer the notes mud hole through the lateral wall of inner catheter, realize the edgewise extrusion, make in the pocket preceding, the side fill bone cement simultaneously, this kind of diversified mud of going out can avoid the resistance to concentrate, can reach the even effect of packing.

Description

Bone cement filling device

Technical Field

The utility model relates to the technical field of medical equipment, specifically a bone cement filling device is particularly useful for the minimal access surgery operation of osteoporosis backbone compression fracture.

Background

The senile osteoporotic spine compression fracture is common clinically, the current main treatment methods of the senile osteoporotic spine compression fracture comprise bed rest, oral administration of calcium and analgesic, wearing of a brace, physical and rehabilitation treatment and the like, or the traditional pedicle screw internal fixation operation can solve the problems of reduction and fixation of the fracture, but the senile osteoporotic spine compression fracture has the defects of large wound, long hospitalization time, high cost, insufficient holding force of the osteoporotic spine, need of secondary operation and the like.

In recent years, minimally invasive spine surgery has appeared, and bone cement is injected into a vertebral body to increase the strength and stability of the vertebral body, so that the applicant has applied for a patent of a bone cement filling device before, and the bone cement filling device is clinically used together with a vertebroplasty complete set of surgical instruments for treating vertebral compression fracture-percutaneous vertebroplasty of lower thoracic vertebra and lumbar vertebra parts caused by vertebral body tumor, osteoporosis or trauma. In the operation, the injection tube and the mesh bag are sent into the vertebral body along the working channel, and the screw propeller is used for injecting bone cement or other bone materials into the mesh bag, so that the collapsed vertebral body is lifted, the strength of the vertebral body is increased, and the pain is relieved.

The prior art is a patent with patent number 200920025327.9, named "vertebral filler", applied by the applicant to the national intellectual property office patent office.

At present, only one end part mud outlet is arranged on an inner conduit in the existing bone cement filling device, the mud is gathered along the mud outlet direction during mud discharging so that the resistance is increased, the bone cement is easy to solidify, the bone cement is slowly diffused to the periphery during recompression, the bone cement is unevenly filled in a mesh bag, and the good treatment effect cannot be achieved.

Therefore, the problem that the bone cement filler capable of realizing uniform pressing of bone cement into the mesh bag needs to be researched and developed aiming at the current situation that when cement is injected into the mesh bag by the existing bone cement filler, the mesh bag is not uniformly filled due to large front resistance of a mud outlet port.

SUMMERY OF THE UTILITY MODEL

The utility model discloses because the big technical problem that leads to filling inhomogeneous in the pocket that receives out mud port the place ahead resistance when pouring into cement into toward the pocket to current bone cement stuffer provides a bone cement stuffer that can realize the even pocket of impressing of bone cement.

The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the bone cement filling device comprises an inner catheter, wherein a mud injection hole communicated with the inner cavity of the inner catheter is formed in the side wall of the inner catheter, and the mud injection hole is located at the bone cement extrusion end of the inner catheter. Bone cement's extrusion end be on the inner catheter with pocket complex one end to have a mud port, because only this a mud port can make the place ahead resistance when pouring into cement into the pocket lead to greatly filling inhomogeneous, consequently offer the notes mud hole through the lateral wall of inner catheter, realize the edgewise extrusion, make in the pocket preceding, the side fill bone cement simultaneously, this kind of diversified mud of going out can avoid the resistance to concentrate, can reach the even effect of packing.

Furthermore, the mud injection holes are at least two and are distributed on the side wall of the inner conduit at intervals and respectively face different directions. The effect of dispersing resistance is achieved.

Furthermore, the two mud injection holes are arranged oppositely and have the same size. The effect of evenly annotating mud in the net bag can be reached to the inner catheter both sides when being convenient for the trompil.

The four mud injection holes are divided into two groups, the two mud injection holes of the first group are arranged oppositely to form a front mud injection hole and a rear mud injection hole, and the two mud injection holes of the second group are arranged oppositely to form an upper mud injection hole and a lower mud injection hole. The mud is discharged from the mesh bag in five directions, the injection pressure of the bone cement is reduced, and the effect of uniform mud injection is achieved.

Further, the diameter of the mud injection hole is not larger than that of the mud outlet port of the inner conduit. Avoid the too big influence of notes mud hole on the inner catheter lateral wall bone cement to go out mud from going out the mud port.

The needle comprises an inner catheter, an outer catheter and a core needle, wherein the inner catheter is sleeved on the core needle, the outer catheter is sleeved on the inner catheter, a mesh bag is fixed in a gap between the front ends of the inner catheter and the outer catheter, and the mesh bag is supported by the core needle.

Further, be provided with the fixing base on the pocket, be provided with the connector on the fixing base, the connector is connected with the end connection of core needle. Has the functions of fixing and supporting the mesh bag.

Further, the mesh bag is a single-layer mesh bag.

Further, the mesh bag is a double-layer mesh bag.

The utility model discloses an adopt above-mentioned technical scheme, have following advantage:

1. bone cement's extrusion end be on the inner catheter with pocket complex one end to have a mud port, because only this a mud port can make the place ahead resistance when pouring into cement into the pocket lead to greatly filling inhomogeneous, consequently offer the notes mud hole through the lateral wall of inner catheter, realize the edgewise extrusion, make in the pocket preceding, the side fill bone cement simultaneously, this kind of diversified mud of going out can avoid the resistance to concentrate, can reach the even effect of packing.

2. The diameter of the mud injection hole is not larger than that of the mud outlet port of the inner catheter, so that the bone cement is prevented from being discharged from the mud outlet port due to the fact that the mud injection hole in the side wall of the inner catheter is too large.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of a structure of a bone cement injection end portion of fig. 1.

Fig. 3 is a schematic view of the structure of the inner duct in embodiment 1.

Fig. 4 is a partially enlarged view of a in fig. 3.

Fig. 5 is a schematic view of the structure of an inner duct in embodiment 2.

Fig. 6 is a partially enlarged view of B in fig. 5.

In the figure, 1, a mesh bag, 2, an outer sleeve, 3, an inner catheter, 31, a mud injection hole, 32, a front mud injection hole, 33, an upper mud injection hole, 34, a mud outlet, 4, a core needle, 5, a sleeve seat, 6, a catheter seat, 7, a core needle seat, 8, a connector, 9 and a fixed seat.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Detailed description of the preferred embodiment 1

As shown in figures 1-4, the bone cement filling device comprises an outer sleeve 2, an inner catheter 3 and a core needle 4, wherein the inner catheter 3 is sleeved on the core needle 4, the outer sleeve 2 is sleeved on the inner catheter 3, a mesh bag 1 is fixedly connected at the front end gap of the inner catheter 3 and the front end gap of the outer sleeve 2, and the mesh bag 1 is supported by the core needle 4. Seted up on the lateral wall of inner catheter 3 and annotated mud hole 31, annotate the bone cement pressure that mud hole 31 is located inner catheter 3 and go out the end, the extrusion end of bone cement is inner catheter 3 and pocket 1 complex one end, and mud port 34 has, because only this one mud port 34 can make when pouring into cement into in the pocket 1 because the 34 the place ahead resistance of mud port that receives leads to filling inhomogeneous in the pocket, consequently, set up notes mud hole 31 through the lateral wall of inner catheter 3, realize the extrusion from the side, make the front of pocket 1, bone cement is filled simultaneously to the side, this kind of diversified mud of going out can avoid pressure to concentrate, can reach the even effect of packing. The mud injection holes 31 are at least two and are distributed on the side wall of the inner conduit at intervals towards different directions respectively so as to disperse resistance. This embodiment annotates mud hole 31 and is provided with two, and two annotate mud hole 31 relative and establish, the size is the same, but sets up like this and once only trompil, can reach the effect of evenly annotating mud toward the pocket 1 in the interior pipe 3 both sides when being convenient for the trompil. In order to avoid that the mud injection holes 31 on the side wall of the inner conduit 3 are too large to influence the mud discharge of the bone cement from the mud discharge port 34, the diameter of the mud injection holes 31 is set to be not larger than that of the mud discharge port of the inner conduit 3.

In addition, the improvement points in the present embodiment are: the net bag 1 is provided with a fixing seat 9, the fixing seat 9 is provided with a connector 8, the end part of the core needle 4 is inserted into the connector 8 for connection, and the net bag 1 is fixed and supported. The mesh bag 1 can adopt a single-layer form or a double-layer form, and a double-layer mesh bag is selected in the embodiment.

Detailed description of the preferred embodiment 2

As shown in fig. 5 and 6, unlike embodiment 1: the mud injection holes are four in the same size, the four mud injection holes are divided into two groups, the two mud injection holes of the first group are opposite and form front and rear mud injection holes, the two mud injection holes of the second group are opposite and form upper and lower mud injection holes, mud discharging in five directions in the mesh bag 1 is achieved, and the effect of evenly injecting mud is achieved while the injection resistance of bone cement is reduced.

Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. The bone cement filler is characterized by comprising an inner catheter (3), wherein a mud injection hole (31) communicated with an inner cavity of the inner catheter (3) is formed in the side wall of the inner catheter (3), and the mud injection hole (31) is located at the bone cement extrusion end of the inner catheter (3).

2. Bone cement filler according to claim 1, characterized in that the said holes (31) are provided in at least two, respectively spaced-apart directions in the side wall of the inner catheter.

3. Bone cement filler according to claim 2, characterized in that the two injection holes (31) are provided, and that the two injection holes (31) are opposite and of the same size.

4. The bone cement filler according to claim 2, characterized in that the mud injection holes are provided with four same size, the four mud injection holes are divided into two groups, the two mud injection holes of the first group are oppositely arranged and form a front mud injection hole and a rear mud injection hole, and the two mud injection holes of the second group are oppositely arranged and form an upper mud injection hole and a lower mud injection hole.

5. Bone cement filler according to any of claims 1-4, characterized in that the diameter of the mud injection hole is not larger than the diameter of the mud outlet port (34) on the inner catheter (3).

6. The bone cement filler according to claim 1, characterized in that it further comprises an outer cannula (2) and a core needle (4), the inner cannula (3) is sleeved on the core needle (4), the outer cannula (2) is sleeved on the inner cannula (3), a mesh bag (1) is fixedly connected at the front end gap of the inner cannula (3) and the outer cannula (2), and the mesh bag (1) is supported by the core needle (4).

7. Bone cement filler according to claim 6, characterized in that the mesh bag (1) is provided with a fixing seat (9), the fixing seat (9) is provided with a connector (8), and the connector (8) is connected with the end of the core pin (4).

8. Bone cement filler according to claim 6 or 7, characterized in that the mesh bag (1) is a single layer mesh bag.

9. Bone cement filler according to claim 6 or 7, characterized in that the mesh bag (1) is a double mesh bag.

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