CN211911778U

CN211911778U - Spiral injector

Info

Publication number: CN211911778U
Application number: CN201921814319.2U
Authority: CN
Inventors: 黄钰; 刘俊; 蒙德; 周先明; 黎家宏
Original assignee: Guangxi Meidunli Medical Technology Co ltd
Current assignee: Guangxi Meidunli Medical Technology Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-11-13
Anticipated expiration: 2029-10-25

Abstract

The present disclosure relates to a spiral injector. The screw injector includes a syringe and a piston rod. One end of the injection tube is provided with an injection port, the other end of the injection tube is fixedly provided with a matching cover with a matching hole, and the matching hole is provided with internal threads. The piston rod is inserted into the syringe through the mating hole and comprises a smooth section and a threaded section with an external thread. Smooth section sets up in the one side that is close to the injection port, smooth section can with mating holes sliding fit, the screw thread section can with mating holes screw-thread fit. Through the technical scheme, different operation requirements can be met by selecting the quick injection mode or the slow injection mode according to the requirements in an actual operation, the operation time is shortened, and the operation efficiency is improved.

Description

Spiral injector

Technical Field

The disclosure relates to the technical field of medical instruments, in particular to a spiral injector.

Background

Vertebroplasty, which is a treatment method for injecting a filling material into a vertebral body through a pedicle of a vertebral arch to increase the compression resistance of the vertebral body, prevent further collapse of the vertebral body, relieve pain in the waist and back, and restore the height of the vertebral body, was originally used in an open surgery for spinal fracture with bone slurry as a filling material. In 1984, Galibert et al, France, used 1 case C2 vertebral body invasive vertebral body hemangioma, first used a method of percutaneous penetration into the vertebral body, injecting Polymethylmethacrylate (PMMA), commonly known as "bone cement", into the vertebral body and succeeded, opening the history of Percutaneous Vertebroplasty (PVP).

However, the screw injector for injecting the bone cement in the prior art has a single function, generally can only realize the action of slow injection, has low injection efficiency, and cannot meet the operation requirement of fast injection.

SUMMERY OF THE UTILITY MODEL

It is an object of the present disclosure to provide a screw injector that can meet both the operational needs of a fast bolus and the operational needs of a slow bolus.

In order to achieve the above object, the present disclosure provides a spiral injector, which includes an injection tube and a piston rod, wherein an injection port is formed at one end of the injection tube, a fitting cover with a fitting hole is fixedly arranged at the other end of the injection tube, an internal thread is arranged in the fitting hole, the piston rod penetrates through the fitting hole and is inserted into the injection tube, the piston rod includes a smooth section and a threaded section with an external thread, the smooth section is arranged at one side close to the injection port, the smooth section can be in sliding fit with the fitting hole, and the threaded section can be in threaded fit with the fitting hole.

Optionally, the smooth section and the threaded section are adjacent.

Optionally, the length of the smooth section is 90-100 mm.

Optionally, a piston is fixedly connected to one end of the piston rod, which is close to the injection port, the outer periphery of the piston abuts against the inner wall of the injection cylinder, and the smooth section is disposed between the threaded section and the piston.

Optionally, the piston is peripherally sleeved with a sealing ring.

Optionally, the mating cap is threadedly connected with the syringe barrel.

Optionally, the screw injector further comprises an injection handle configured in a T-shaped structure, and one end of the piston rod away from the injection port is fixedly connected with the injection handle.

Optionally, the injection port of the injection cylinder is provided with a luer connector, and the luer connector is communicated with the cavity of the injection cylinder.

Optionally, the screw injector further comprises an extension tube connected to the luer fitting.

Optionally, the outer wall of the injection tube is annularly provided with a plurality of anti-slip grooves, and the anti-slip grooves are arranged at intervals along the axial direction of the injection tube.

Through the technical scheme, different operation requirements can be met by selecting the quick injection mode or the slow injection mode according to the requirements in an actual operation, the operation time is shortened, and the operation efficiency is improved. For example, when it is desired to purge the syringe and the extension tube connected thereto, a rapid injection mode may be selected so that the air therein may be rapidly purged. In the process of injecting the bone cement, a slow injection mode can be selected, so that the accurate control of the injection amount of the bone cement can be realized.

And, because there is certain resistance in the injection of "bone cement", therefore can produce certain force of retreating to the piston rod, because in the slow injection mode, piston rod and mating hole are the screw-thread fit, the screw thread on the two is mutual to be butted, can't promote the piston rod to retreat to the force of retreating in the straight line direction that produces the piston rod, thus can guarantee "bone cement" inject smoothly and inject safely, and through the slow precession of piston rod, can make the piston rod overcome the injection resistance step by step and advance, for directly pushing the piston rod with the hand, can show reduction operator's intensity of labour.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic perspective view of a bolus screw according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a screw injector according to an embodiment of the present disclosure, wherein the extension tube is not shown.

Icon: 100-a spiral injector; 10-an injection cylinder; 11-an injection port; 12-anti-slip groove; 20-a piston rod; 21-smooth section; 22-a threaded section; 23-a piston; 24-a sealing ring; 30-a mating cover; 31-mating holes; 40-an injection handle; a 50-luer fitting; 60-extension tube.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present invention, there is provided a screw injector 100, as shown in fig. 1 and 2, the screw injector 100 is used for injecting bone cement, and the screw injector 100 includes an injection tube 10 and a piston rod 20. The syringe barrel 10 is typically filled with "cement" which is injected by advancement of the plunger rod 20. One end of the syringe 10 has an injection port 11, and the other end of the syringe 10 is fixedly provided with a fitting cap 30 having a fitting hole 31. The mating bore 31 is internally threaded and the piston rod 20 is inserted into the syringe barrel 10 through the mating bore 31 to push the "cement" within the syringe barrel 10 out of the syringe barrel 10. The piston rod 20 includes a smooth section 21 and a threaded section 22 having an external thread, the smooth section 21 is disposed on a side near the injection port 11, and the threaded section 22 is capable of being threadedly engaged with the engagement hole 31.

When the piston rod 20 is advanced forward, the smooth section 21 is first slidably engaged with the engagement hole 31, and the piston rod 20 can be advanced rapidly, in this case, in the rapid injection mode, and then the threaded section 22 is threadedly engaged with the engagement hole 31, and the piston rod 20 is advanced, in this case, in the slow injection mode.

Through the technical scheme, different operation requirements can be met by selecting the quick injection mode or the slow injection mode according to the requirements in an actual operation, the operation time is shortened, and the operation efficiency is improved. For example, when it is desired to purge the syringe 10 and the extension tube 60 connected to the syringe 10, a rapid injection mode may be selected so that the air therein may be rapidly purged. In the process of injecting the bone cement, a slow injection mode can be selected, so that the accurate control of the injection amount of the bone cement can be realized.

Moreover, because certain resistance exists in the injection of the bone cement, certain retreating force can be generated on the piston rod 20, because in the slow injection mode, the piston rod 20 and the matching hole 31 are in threaded matching, threads on the two are mutually abutted, and the retreating force in the linear direction generated on the piston rod 20 can not push the piston rod 20 to retreat, thereby ensuring the smooth injection and safe injection of the bone cement, and through the slow screwing-in of the piston rod 20, the piston rod 20 can gradually overcome the injection resistance to advance, compared with the direct manual pushing of the piston rod 20, the labor intensity of an operator can be obviously reduced.

As shown in fig. 2, one end of the piston rod 20 is fixedly connected with the piston 23, and the other end is fixedly connected with the injection handle 40. The outer periphery of the plunger 23 abuts the inner wall of the syringe barrel 10 for pushing "cement" inside the syringe barrel 10 out of the injection port 11. The outer periphery of the piston 23 is sleeved with a sealing ring 24 to increase the sealing degree between the outer periphery of the piston 23 and the inner wall of the syringe 10.

The injection handle 40, threaded section 22, smooth section 21 and piston 23 are arranged in sequence. The smooth section 21 is disposed between the threaded section 22 and the piston 23. The smooth section 21 is adjacent to the threaded section 22, and the slow injection mode is entered after the fast injection, so that the injection efficiency of the bone cement is improved.

Optionally, the length of the smooth section 21 is 90-100 mm, and further may be 95 mm. When the piston rod 20 is advanced through the length of the smooth section 21, it is possible to quickly evacuate the syringe 10 of air, thereby facilitating subsequent operations.

The injection handle 40 is constructed into a T-shaped structure, one end of the piston rod 20, which is far away from the injection port 11, is fixedly connected with the injection handle 40, the force arm for rotating the piston rod 20 can be increased by arranging the injection handle 40, an operator can conveniently rotate the piston rod 20 in a slow injection mode, and labor is saved.

As shown in fig. 2, a matching cover 30 is disposed at one end of the syringe 10 close to the injection handle 40, the matching cover 30 covers one end of the syringe 10 far from the injection port 11, and the matching cover 30 is in threaded connection with the syringe 10. Therefore, when the syringe 10 needs to be cleaned, the piston rod 20 can be easily removed and cleaned by removing the fitting cap 30.

As shown in fig. 2, the injection port 11 of the syringe 10 is provided with a luer 50, and the luer 50 is communicated with the cavity of the syringe 10, so as to facilitate the connection and the disconnection between the extension tube 60 and the syringe 10.

As shown in fig. 1, the screw injector 100 further includes an extension tube 60, the extension tube 60 being connected to the luer 50. By connecting extension tubing 60 at the interface of luer 50, the injection range and flexibility of injection of "bone cement" can be increased.

As shown in fig. 2, the side wall of the syringe 10 is transparent, and the outer wall of the syringe 10 is provided with graduations. The syringe 10 may be made of transparent plastic, thereby facilitating observation of changes in the amount of "bone cement" in the syringe 10 at any time during injection.

The outer wall of the injection tube 10 is annularly provided with a plurality of anti-slip grooves 12, and the anti-slip grooves 12 are arranged at intervals along the axial direction of the injection tube 10. Therefore, when in operation, the syringe 10 can be held for injection, and the anti-slip groove 12 can effectively avoid the slip phenomenon when the piston rod 20 is pushed by force. The outer wall of the syringe 10 is of a curved structure, which is convenient to hold during operation.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of the various embodiments of the present disclosure can be made without departing from the spirit of the present disclosure, and the present disclosure should also be considered as the disclosed embodiments and not limited to the embodiments, and various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The spiral injector is characterized by comprising an injection cylinder (10) and a piston rod (20), wherein an injection port (11) is formed in one end of the injection cylinder (10), a matching cover (30) with a matching hole (31) is fixedly arranged at the other end of the injection cylinder (10), an internal thread is arranged in the matching hole (31), the piston rod (20) penetrates through the matching hole (31) and is inserted into the injection cylinder (10), the piston rod (20) comprises a smooth section (21) and a threaded section (22) with an external thread, the smooth section (21) is arranged on one side close to the injection port (11), the smooth section (21) can be in sliding fit with the matching hole (31), and the threaded section (22) can be in threaded fit with the matching hole (31).

2. The screw injector of claim 1, wherein the smooth section (21) and the threaded section (22) are adjacent.

3. The spiral injector of claim 1, wherein the smooth section (21) has a length of 90-100 mm.

4. The bolus screw injector according to claim 1, wherein a piston (23) is fixedly connected to one end of the piston rod (20) near the injection port (11), the outer circumference of the piston (23) abuts against the inner wall of the syringe (10), and the smooth section (21) is disposed between the threaded section (22) and the piston (23).

5. A screw injector according to claim 4, wherein the piston (23) is peripherally provided with a sealing ring (24).

6. The screw injector of claim 1, wherein the mating cap (30) is threadedly connected with the syringe barrel (10).

7. The screw injector according to claim 1, wherein the screw injector (100) further comprises an injection handle (40) configured in a T-shaped configuration, and an end of the piston rod (20) remote from the injection port (11) is fixedly connected with the injection handle (40).

8. Screw injector according to claim 1, characterized in that the injection port (11) of the syringe (10) is provided with a luer connector (50), the luer connector (50) being in communication with the cavity of the syringe (10).

9. The screw injector of claim 8, wherein the screw injector (100) further comprises an extension tube (60), the extension tube (60) being connected to the luer fitting (50).

10. The spiral injector of claim 1, wherein the outer wall of the syringe (10) is provided with a plurality of anti-slip grooves (12) in a circumferential manner, the anti-slip grooves (12) being spaced apart in an axial direction of the syringe (10).