CN217511001U

CN217511001U - Syringe for embolization

Info

Publication number: CN217511001U
Application number: CN202221171009.5U
Authority: CN
Inventors: 陈尘; 胡立宝; 郅新
Original assignee: Peking University Peoples Hospital
Current assignee: Peking University Peoples Hospital
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-09-30
Anticipated expiration: 2032-05-16

Abstract

The utility model discloses an injector for embolism art, including piston assembly and cylinder subassembly, in addition, still include: the movable sleeve is connected with the cylinder cover of the cylinder component through a detachable connecting structure; a piston shaft in the piston assembly penetrates through the center of the movable sleeve and is in threaded connection with the movable sleeve; the diameter of a through hole formed in the center of the cylinder cover and used for the piston shaft to penetrate through is larger than the outer diameter of the piston shaft. The utility model is used for the syringe of embolism art, simple structure, convenient to use can freely switch over two kinds of modes of pressure injection and ordinary injection, makes things convenient for clinical use, improves injection efficiency.

Description

Syringe for embolization

Technical Field

The utility model relates to the technical field of medical treatment, especially, relate to an injector for embolism art.

Background

The arteria-transversa embolization is a conventional treatment method for treating malignant tumors such as liver cancer, and the most commonly used embolization agent in the operation is iodized oil. Iodized oil is very viscous, needs to be pushed through a micro catheter with the diameter of less than 1 mm, has very large injection pressure, is pushed by a common injector, and wastes time and labor. In the prior art, a pressure syringe for embolism with the patent number of 94225099.0 can be adopted, but only pressure injection can be carried out when in use, common injection and suction like a common syringe cannot be carried out, and the common syringe is also required when in need of common injection or suction, so the use process is very inconvenient and the universality is poor.

Disclosure of Invention

The utility model aims at solving the above problems, providing an injector for embolism operation, simple structure, convenient to use can freely switch over two kinds of modes of pressure injection and ordinary injection, makes things convenient for clinical use, improves injection efficiency.

In order to achieve the above object of the present invention, the present invention provides an injector for embolization, which comprises a piston assembly and a syringe assembly, and further comprises: the movable sleeve is connected with the cylinder cover of the cylinder component through a detachable connecting structure; a piston shaft in the piston assembly penetrates through the center of the movable sleeve and is in threaded connection with the movable sleeve; the diameter of a through hole formed in the center of the cylinder cover and used for the piston shaft to penetrate through is larger than the outer diameter of the piston shaft.

Preferably, the detachable connection structure includes: the plug is arranged on the lower surface of the movable sleeve and extends towards the cylinder cover; and the jack is arranged on the upper surface of the barrel cover and corresponds to the plug on the movable sleeve.

Alternatively, the detachable connection structure includes: and the at least one pair of buckles are arranged on two sides of the movable sleeve and are bent towards the cylinder cover.

Further, the buckle tail end is equipped with the joint platform of epirelief, detachable connection structure still includes: and the clamping holes are arranged on two sides of the cylinder cover and used for correspondingly buckling with the clamping platforms at the tail ends of the at least one pair of buckles on two sides of the movable sleeve.

Preferably, the center of the cylinder cover is provided with a through hole with the diameter larger than the outer diameter of the piston shaft.

Compared with the prior art, the utility model discloses a syringe for embolism art has following beneficial effect:

1. the utility model is used for the syringe of embolism art, simple structure, convenient to use can freely switch over pressure injection and ordinary injection two kinds of modes according to the operation needs, makes things convenient for clinical use, improves injection efficiency.

2. The utility model is used for the injector of embolism, the movable sleeve is connected with the piston shaft in the piston component by screw thread, and the piston shaft can move freely in the center of the cylinder cover of the cylinder component, when the movable sleeve and the piston shaft are relatively static, the function of the common injector can be realized by moving the piston shaft along the cylinder body of the cylinder component; the movable sleeve is connected with the cylinder cover through a detachable structure, and after the movable sleeve is connected with the cylinder cover, the piston shaft rotates relative to the movable sleeve to realize the movement relative to the cylinder body, so that the injector realizes the function of pressure injection.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of a first embodiment of a syringe for embolization according to the present invention, in which the movable cover and the cap are not connected;

FIG. 2 is a schematic view of a first embodiment of a syringe for embolization according to the present invention, in which a movable cover and a cap are connected;

FIG. 3 is a schematic view of a structure of the movable sleeve of the present invention;

FIG. 4 is a bottom plan view of the first configuration of the active sleeve of FIG. 3;

FIG. 5 is a bottom view of the second configuration of the active sleeve of FIG. 3;

FIG. 6 is a top view of one construction of the syringe assembly of the present invention;

FIG. 7 is a schematic view of a second configuration of a movable sleeve and a cap of the syringe for embolization according to the present invention in a connected state;

FIG. 8 is a top view of the holster of FIG. 7;

fig. 9 is a schematic view of another structure of the movable sleeve of the present invention.

Detailed Description

As shown in fig. 1, fig. 2 and fig. 7, the structural schematic diagrams of the injector for embolization of the present invention are respectively schematic diagrams of different structures, and it can be seen from the drawings that the injector for embolization of the present invention comprises a piston assembly and a cylinder assembly, and in addition, further comprises: the movable sleeve 3 is connected with the cylinder cover 4 of the cylinder component through a detachable connecting structure; a piston shaft 2 in the piston assembly penetrates through the center of the movable sleeve and is in threaded connection with the movable sleeve; the diameter of a through hole which is formed in the center of the cylinder cover and used for the piston shaft to pass through is larger than the outer diameter of the piston shaft.

In the injector for embolization of the utility model, the movable sleeve is in threaded connection with the piston shaft, and the piston shaft can move freely in the center of the cylinder cover, so that when the movable sleeve and the piston shaft are relatively static and the movable sleeve and the cylinder cover are separated (as shown in fig. 1), the functions of a common injector can be realized by moving the piston shaft along the cylinder body of the cylinder assembly; the movable sleeve is connected with the cylinder cover through a detachable structure, and after the movable sleeve is fixedly connected with the cylinder cover (as shown in figures 2 and 7), the piston shaft rotates relative to the movable sleeve to realize the movement of the piston shaft relative to the cylinder body, so that the injector realizes the function of pressure injection. It can be seen that the utility model discloses an injector, simple structure, convenient to use can freely switch over pressure injection and ordinary injection two kinds of modes according to the operation needs, makes things convenient for clinical use, improves injection efficiency.

Specifically, the injector of the utility model comprises a piston component, a needle cylinder component and a movable sleeve. The needle cylinder component comprises a cylinder body 5 and a cylinder cover 4 which is positioned at the top end of the cylinder body and is integrally connected with the cylinder body, a through hole 8 (shown in figure 6) is formed in the center of the cylinder cover, an internal thread is arranged at a connector which is arranged at the front end of the cylinder body and is used for connecting a catheter, the internal thread can be in threaded connection with an external thread at the tail end of the catheter to be connected, and therefore the injector and the catheter can be stably connected together in a threaded connection mode. The piston assembly comprises a piston handle 1 positioned outside the cylinder 5, a piston shaft 2 partially inserted into the cylinder and a piston positioned at the lower end of the piston shaft and moving along the inner wall of the cylinder, and the diameter of the through hole in the center of the cylinder cover is larger than the outer diameter of the piston shaft in order to facilitate the piston assembly to move up and down relative to the cylinder.

And for realizing the function that the syringe carries out pressure injection, the utility model discloses movable sleeve 3 is connected through dismantling connection structure with cover 4, and piston shaft 2 passes the movable sleeve center and with movable sleeve threaded connection.

Wherein, the utility model discloses a can dismantle connection structure can adopt as shown in fig. 1-6 structure, include: a plug 6 (see fig. 1-3) arranged on the lower surface of the movable sleeve 3 and extending towards the cylinder cover; and the jack 9 is arranged on the upper surface of the cylinder cover 4 and corresponds to the position of the plug 6 on the movable sleeve (see figure 6).

The number of the plugs 6 arranged on the lower surface of the movable sleeve 3 can be one or more (four as shown in fig. 4 and 5, symmetrically arranged on two sides of the lower surface of the movable sleeve), and correspondingly, the number of the jacks arranged on the upper surface of the cylinder cover is the same as that of the plugs, and the positions of the jacks correspond to each other, so that the plugs can be inserted into the jacks. Can be fixed in the cover through dismantling connection structure, make both can not produce relative movement to but make the piston shaft relative barrel movement through rotatory piston shaft, produce the effect of the interior liquid of extrusion barrel, promptly, realize the function of pressure injection.

During manufacturing, the cylinder cover can adopt a plate-shaped structure (as shown in fig. 6) with an ellipse-like or prismatic-like shape, or can adopt a rectangular structure (not shown in the figure), the center of the cylinder cover is provided with a through hole 8 with a diameter larger than the major diameter of the piston shaft, the periphery of the cylinder cover is provided with a plurality of insertion holes, the movable sleeve 3 inserted into the cylinder cover can adopt a rectangular plate (as shown in fig. 4 and 8), or the outer contour of the movable sleeve can adopt the same shape as that of the cylinder cover (as shown in fig. 5). The center of the movable sleeve is provided with an internal thread hole 7, the outer wall of the piston shaft is provided with an external thread, the external thread can be fully distributed on the whole length of the piston shaft, and a part of external thread can be processed on the piston shaft only under the condition of meeting the stroke of the piston shaft moving up and down along the cylinder.

In addition, the detachable connection structure of the present invention can also adopt the structure shown in fig. 7 and 8, which includes at least a pair of buckles 10 (only a pair of buckles is shown in the figure) disposed on both sides of the movable sleeve 3 and bending toward the cylinder cover. During setting, the buckle can set up the different positions department at the movable sleeve according to actual conditions. For example, when the movable sleeve is a rectangular plate as shown in fig. 4 and 8, the fastener may be disposed on the outer wall of the movable sleeve extending in the width direction, or may be disposed on the outer wall extending in the length direction, and in order to resist the rotation force when the piston shaft rotates relative to the movable sleeve after the movable sleeve and the cylinder cover are fixed by the fastener, the fastener is preferably disposed on the outer wall of the movable sleeve extending in the length direction, so as to improve the fixing stability; and when the structure shown in fig. 5 is adopted, the catch may be provided on the outer wall extending in the width direction.

The buckle 10 may be a bent structure as shown in fig. 7, that is, it includes a vertical portion and a horizontal portion, and the height of the vertical portion is designed reasonably so that after the movable sleeve is placed above the cover, the horizontal portion of the buckle can tightly attach to the lower surface of the cover. Alternatively, the tail end of the buckle may be provided with a convex clamping platform, that is, as shown in fig. 9, the tail end of the horizontal portion is provided with a raised clamping platform, so that the buckle is in a hook shape, and correspondingly, two sides of the cover are further provided with clamping holes (not shown in the figure) for correspondingly buckling with the clamping platforms at the tail end of the buckle at two sides of the movable sleeve. In order to fix the movable sleeve on the cylinder cover through the buckle, the buckle can be made of elastic materials.

The utility model discloses a syringe, after the movable sleeve is connected with the cover, make the relative movable sleeve of piston axle twist into the barrel through rotary piston handle 1 in, can extrude the thick embolic agent in the barrel, realize extruding the purpose of barrel in order to carry out pressure injection with embolic agent. When the suppository is used up and the medicine needs to be pumped out again, the movable sleeve can be separated from the cylinder cover, the movable sleeve is screwed to the tail end of the piston shaft, and then the movable sleeve and the piston shaft can synchronously push and pull along the cylinder under the action of external force, so that the injector becomes the mode of a common injector.

To sum up, the utility model discloses an injector for embolism art, simple structure, convenient to use can freely switch over two kinds of modes of pressure injection and ordinary injection according to the operation needs, makes things convenient for clinical use, improves injection efficiency.

Although the present invention has been described in detail, the present invention is not limited thereto, and those skilled in the art can modify the principle of the present invention, and therefore, various modifications performed according to the principle of the present invention should be understood as falling into the protection scope of the present invention.

Claims

1. An injector for embolization comprising a plunger assembly and a barrel assembly, further comprising:

the movable sleeve is connected with the cylinder cover of the cylinder component through a detachable connecting structure;

a piston shaft in the piston assembly penetrates through the center of the movable sleeve and is in threaded connection with the movable sleeve;

the diameter of a through hole which is formed in the center of the cylinder cover and used for the piston shaft to penetrate through is larger than the outer diameter of the piston shaft.

2. The syringe for embolization according to claim 1, wherein the detachable connection structure comprises:

the plug is arranged on the lower surface of the movable sleeve and extends towards the cylinder cover;

and the jack is arranged on the upper surface of the barrel cover and corresponds to the plug on the movable sleeve.

3. The syringe for embolization according to claim 1, wherein the detachable connection structure comprises: and the at least one pair of buckles are arranged on two sides of the movable sleeve and are bent towards the cylinder cover.

4. The syringe for embolization according to claim 3, wherein the snap tail is provided with an upwardly convex snap platform.

5. The syringe for embolization according to claim 4, wherein the detachable connection structure further comprises: and the clamping holes are arranged on two sides of the cylinder cover and are used for correspondingly buckling with the clamping platforms at the tail ends of at least one pair of buckles on two sides of the movable sleeve.