CN211911781U

CN211911781U - Bone cement injection device

Info

Publication number: CN211911781U
Application number: CN202020254070.0U
Authority: CN
Inventors: 梁晓明; 胡继平; 李娜
Original assignee: HOHHOT FIRST HOSPITAL
Current assignee: HOHHOT FIRST HOSPITAL
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-11-13
Anticipated expiration: 2030-03-04

Abstract

The utility model provides a bone cement injection device, including the needle tubing, sectional type push rod and pjncture needle, the sectional type push rod cup joints in the needle tubing, the needle tubing comprises body and end cover, the detachable body front end that is fixed in of end cover, the both ends opening of body, the sectional type push rod is by annotating pole section soon and straight push rod section, annotate pole section soon and straight push rod section articulated, annotate pole section soon and include the threaded rod, the front end of threaded rod is fixed with the ball seat, straight push rod section includes the connecting rod, one side of connecting rod is fixed with the ball pivot, the opposite side of connecting rod is fixed with the piston, the handheld portion of pjncture needle passes through the luer female joint and the. The front end of the needle tube of the device is detachable, so that the bone cement can be quickly filled into the needle tube, and gaps of the bone cement can be prevented; the push rod of the device adopts a sectional type hinge structure, and the end face of the front section can be kept in fit with the end face of the bone cement when the rear section is injected in a spiral mode, so that the aim of saving labor can be fulfilled, and the injection amount of the bone cement can be accurately controlled when the front section is injected.

Description

Bone cement injection device

Technical Field

The utility model relates to the field of medical equipment, concretely relates to bone cement injection device.

Background

Percutaneous vertebroplasty is a treatment operation developed in recent ten years and suitable for vertebral body compression pain caused by senile osteoporosis, compression fracture, primary or metastatic tumor of vertebral body, myeloma and vertebral body pain caused by invasive hemangioma of vertebral body. The method is to inject bone cement into a pathological vertebral body through a percutaneous puncture way under the guidance of various images so as to prevent the vertebral body from being compressed and collapsed due to the influence of various factors and relieve or alleviate the pain of a patient. However, the existing surgical instruments have the defects of complex operation, low curative effect, large wound and more complications.

In order to solve the problem, application number 201521088539.3's utility model discloses a bone cement filler, this filler is including the cylinder, the cylinder interpolation has the telescopic to be used for extracting or injecting the piston rod of bone cement, be equipped with first external screw thread on the piston rod, be equipped with the second external screw thread on the cylinder be equipped with a location section of thick bamboo between cylinder and the piston rod be equipped with on the location section of thick bamboo respectively with first external screw thread complex first internal thread and with second external screw thread complex second internal thread, the second internal thread is located first internal thread outer lane.

However, the above filler has the following problems: 1. because the needle tube of the filling device is longer, when the mixed bone cement is filled into the needle tube from the rear end of the needle tube, a plurality of gaps are formed among the bone cement, and when the bone cement is sucked from the nipple at the front end of the needle tube, because the diameter of the nipple is smaller, the bone cement is sucked into the needle tube completely, and a longer time is needed; 2. this stuffer's push rod formula structure as an organic whole, when rotatory promotion push rod, the piston of push rod front end also can rotate thereupon, and the laminating between piston and the bone cement is closely back, rotates the piston and can have great resistance, and can cause the space to appear between piston and the bone cement after breaking away from between piston and the bone cement, is difficult to guarantee the injection volume of the accurate control bone cement of notes pressurization injection mode soon.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model develops a bone cement injection device, the front end of the needle tube of the device can be disassembled, so that the bone cement can be rapidly filled into the needle tube, the gap between the bone cement due to discontinuous filling can be prevented, the needle tube can be conveniently cleaned, and the bone cement is prevented from remaining; the push rod of the device adopts a sectional type hinge structure, and the end face of the front section can be kept in fit with the end face of the bone cement when the rear section is injected in a spiral mode, so that the aim of saving labor can be fulfilled, and the injection amount of the bone cement can be accurately controlled when the front section is injected.

In order to achieve the technical effects, the utility model discloses a following technical scheme realizes:

a bone cement injection device comprises a needle tube, a sectional type push rod and a puncture needle, wherein the sectional type push rod is sleeved in the needle tube, and the puncture needle is detachably fixed at the front end of the needle tube. The needle tube comprises a tube body and an end cover, wherein the end cover is detachably fixed at the front end of the tube body, a concentric sleeve is fixed on the inner side of the end cover, an embedded groove is formed between the concentric sleeve and the inner wall of the end cover, a sealing gasket is filled in the embedded groove, internal threads are arranged on the inner wall of the end cover, and a luer male connector is arranged on the outer side of the end cover. The two ends of the tube body are open, the tail of the tube body is provided with fins, the outer wall of the front end of the tube body is provided with external threads, the inner wall of the rear section of the tube body is provided with internal threads, and the front end of the tube body is inserted into the caulking groove of the end cover and is extruded on the sealing gasket to form sealing connection.

The sectional type push rod consists of a rotary injection rod section and a straight push rod section, and the rotary injection rod section is hinged with the straight push rod section. The rotary injection rod section comprises a threaded rod, a ball seat is fixed at the front end of the threaded rod, a spherical accommodating cavity is formed in the ball seat, a base is fixed at the rear end of the threaded rod, and a pull ring is fixed on the base. The straight push rod section comprises a connecting rod, a spherical hinge is fixed on one side of the connecting rod, a piston is fixed on the other side of the connecting rod, and the spherical hinge is inserted into a spherical containing cavity of the ball seat to form spherical hinge. The threaded rod and the internal thread of the pipe body form a threaded connection relation.

The puncture needle comprises a handheld part, one side of the handheld part is provided with a luer female connector, and the handheld part is connected with a luer male connector of the end cover through the luer female connector. A needle head which is communicated with the luer female joint is fixed on the other side of the hand-held part.

The utility model has the advantages that: the front end of the needle tube of the device is detachable, so that the bone cement can be quickly filled into the needle tube, gaps among the bone cement due to discontinuous filling can be prevented, the needle tube can be conveniently cleaned, and the bone cement is prevented from remaining; the push rod of the device adopts a sectional type hinge structure, and the end face of the front section can be kept in fit with the end face of the bone cement when the rear section is injected in a spiral mode, so that the aim of saving labor can be fulfilled, and the injection amount of the bone cement can be accurately controlled when the front section is injected.

Drawings

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

FIG. 1 is a schematic cross-sectional view of a bone cement injection device;

FIG. 2 is a schematic view of the construction of the needle cannula;

FIG. 3 is a schematic view of the sectional type push rod;

fig. 4 is a schematic view of the structure of the puncture needle.

In the drawings, the components represented by the respective reference numerals are listed below:

1-needle tube, 2-sectional push rod, 3-puncture needle, 11-end cover, 12-sealing washer, 13-internal thread, 14-external thread, 15-fin, 16-luer male joint, 21-ball seat, 22-connecting rod, 23-piston, 24-pull ring, 25-spherical containing cavity, 26-ball hinge, 27-base, 31-needle, 32-handheld part and 33-luer female joint.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in figures 1-4, a bone cement injection device comprises a needle tube 1, a sectional type push rod 2 and a puncture needle 3, wherein the sectional type push rod 2 is sleeved in the needle tube 1, and the puncture needle 3 is detachably fixed at the front end of the needle tube 1. The needle tube 1 comprises a tube body and an end cover 11, wherein the end cover 11 is detachably fixed at the front end of the tube body, a concentric sleeve is fixed on the inner side of the end cover 11, an embedded groove is formed between the concentric sleeve and the inner wall of the end cover, a sealing gasket 12 is filled in the embedded groove, internal threads are arranged on the inner wall of the end cover 11, and a luer male connector 16 is arranged on the outer side of the end cover 11. The two ends of the pipe body are open, the tail of the pipe body is provided with a fin 15, the outer wall of the front end of the pipe body is provided with an external thread 14, the inner wall of the rear section of the pipe body is provided with an internal thread 13, and the front end of the pipe body is inserted into the caulking groove of the end cover and is extruded on the sealing washer 12 to form sealing connection.

The sectional type push rod 2 consists of a rotary injection rod section and a straight push rod section, and the rotary injection rod section is hinged with the straight push rod section. The injection rod section comprises a threaded rod, a ball seat 21 is fixed at the front end of the threaded rod, a spherical accommodating cavity 25 is formed in the ball seat 21, a base 27 is fixed at the rear end of the threaded rod, and a pull ring 24 is fixed on the base 27. The straight push rod section comprises a connecting rod 22, one side of the connecting rod 22 is fixed with a spherical hinge 26, the other side of the connecting rod 22 is fixed with a piston 23, and the spherical hinge 26 is inserted into a spherical accommodating cavity 25 of the ball seat 21 to form spherical hinge. The threaded rod is in threaded connection with the internal thread 13 of the tube body.

The puncture needle 3 comprises a handheld part 32, a luer female connector 33 is arranged on one side of the handheld part 32, and the handheld part 32 is connected with the luer male connector 16 of the end cover 11 through the luer female connector 33. A needle 31 penetrating the luer connector 33 is fixed to the other side of the handle 32.

One specific application of the device is as follows: 1. filling of bone cement: the end cover 11 is unscrewed from the tube body, bone cement is filled from the front end of the tube body, then the end cover 11 is screwed to the front end of the tube body, the tube body is inserted into the caulking groove of the end cover 11 and is propped against the sealing washer 12, the end cover 11 forms sealing on the tube body, the bone cement can be integrally filled into the tube body, and no gap is formed among the bone cement; 2. assembling and debugging: connecting the luer female connector 33 of the puncture needle with the luer male connector of the end cap 11; the rotary injection rod section of the rotary-knob sectional type push rod 2 advances spirally, the straight push rod section pushes forwards under the pushing of the rotary injection rod section, and the rotary-knob sectional type push rod 3 is continuously turned until the piston is tightly attached to the end face of the bone cement and no gap exists in the bone cement; 3. and (3) injection: under the transmission of an X-ray machine, a needle head 31 of a puncture needle 3 is punctured into a gap of a target vertebral body, a forefinger is sleeved on a pull ring 24 and rotates a rotary injection rod section of a rotary-knob sectional type push rod 2, the rotary injection rod section spirally advances, a straight push rod section is hinged with the rotary injection rod section, in a spiral advancing type of the rotary injection rod section, the straight push rod section still linearly advances and cannot rotate, the piston 23 is prevented from being separated from a bone cement surface, and the injection amount of the bone cement cannot be accurately controlled due to the fact that a gap is formed between the bone cement.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bone cement injection device is characterized by comprising a needle tube, a sectional type push rod and a puncture needle, wherein the sectional type push rod is sleeved in the needle tube, and the puncture needle is detachably fixed at the front end of the needle tube; the needle tube consists of a tube body and an end cover, wherein the front end of the tube body is inserted into the end cover and is in sealing connection with the end cover; the sectional type push rod consists of a rotary injection rod section and a straight push rod section, and the rotary injection rod section is hinged with the straight push rod section.

2. The bone cement injection device according to claim 1, wherein a concentric sleeve is fixed on the inner side of the end cap, a caulking groove is formed between the concentric sleeve and the inner wall of the end cap, a sealing gasket is filled in the caulking groove, internal threads are arranged on the inner wall of the end cap, and a luer male connector is arranged on the outer side of the end cap; the two ends of the pipe body are opened, the tail part of the pipe body is provided with fins, the outer wall of the front end of the pipe body is provided with external threads, the inner wall of the rear section of the pipe body is provided with internal threads, and the front end of the pipe body is inserted into the caulking groove of the end cover and is extruded on the sealing gasket to form sealing connection.

3. The bone cement injection device according to claim 1, wherein the injection rod section comprises a threaded rod, a ball seat is fixed at the front end of the threaded rod, a spherical containing cavity is formed inside the ball seat, a base is fixed at the rear end of the threaded rod, and a pull ring is fixed on the base; the straight push rod section comprises a connecting rod, a spherical hinge is fixed on one side of the connecting rod, a piston is fixed on the other side of the connecting rod, the spherical hinge is inserted into a spherical containing cavity of the ball seat to form spherical hinge, and a threaded connection relation is formed between the threaded rod and the internal thread of the pipe body.

4. The bone cement injection device as claimed in claim 1, wherein the puncture needle comprises a hand-held portion, one side of the hand-held portion is provided with a luer female connector, the other side of the hand-held portion is fixed with a needle head communicated with the luer female connector, and the hand-held portion is connected with the luer male connector of the end cap through the luer female connector.