Special injector and injection device for arteriovenous pumping gas

Abstract

The utility model discloses a special injector for arteriovenous pumping gas and an injection device, the injector comprises a cylinder body, a rod core and a piston, the piston is fixed at one end of the rod core, and a cavity in the cylinder body is divided into a first cavity body and a second cavity body; a limiting blocking piece is arranged on the rod core in the height direction of the rod core, a first notch and a second notch are further formed in the rod core, a limiting protrusion is arranged on the inner wall of the cylinder body, and the position, located in the second cavity, of the limiting protrusion is switched through the first notch and the position, located in the second cavity, of the limiting protrusion. The cylinder and the rod core rotate relatively, the limiting protrusion rotates to the position between the limiting blocking pieces, during injection, the piston is moved by pressing the pressing piece of the rod core, the moving distance of the piston is only limited to the distance between the limiting blocking pieces, and therefore during injection, a fixed amount of gas is injected, and the injection precision is improved; and different types of poison gases can be quantitatively output through the two injectors.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a special syringe and injection device for arteriovenous gas pumping. Background Art

[0002] Gas injection therapy through arteriovenous injection has been widely carried out in animal experiments and has also been used in clinical practice to a small extent. It is currently in the animal experiment stage and has not yet been used clinically. In the later stage, it will be used for interventional treatment of liver cancer, injecting drugs directly from the artery into the tumor area. Studies have found that injecting toxic gases is more effective in treating tumors; but there are currently no special gas syringes for animal experiments. Using ordinary syringes to inject gas has the following disadvantages: 1. Gas leaks easily. In the process of extracting toxic gas and then injecting it into the tumor area, the toxic gas will leak, so the syringe needs to be leak-proof; 2. Both extracting and injecting gas need to be controlled. When using ordinary syringes, the amount of gas injected cannot be precisely controlled in micro amounts. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a special syringe and injection device for arteriovenous gas pumping, which can achieve precise control of the injected gas and prevent gas leakage.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] In a first aspect, the present invention provides a syringe for arteriovenous gas pumping, comprising a barrel, a rod core, and a piston, wherein the piston is fixed to one end of the rod core and divides the cavity in the barrel into a first cavity and a second cavity;

[0006] The rod core is provided with a plurality of spaced-apart limiting blocks along its height direction, and a first notch and a second notch are also provided on the rod core. A limiting protrusion is provided on the inner wall of the cylinder, and the limiting protrusion is located in the second cavity through the first notch and the switch.

[0007] In an optional embodiment, the rod core includes at least one plate, and the plate separates the second cavity into at least one adjustment area and an injection area;

[0008] The first notch and the second notch are provided on the side of the plate body, and the adjustment area and the injection area are connected through the first notch and the second notch;

[0009] The limit blocking pieces are arranged in the adjustment area and distributed along the height direction of the plate body.

[0010] In an optional embodiment, the limiting blocks are evenly distributed or unevenly distributed in the height direction of the plate.

[0011] In an optional embodiment, the limiting blocking piece is arranged in the area between the first notch and the second notch.

[0012] In an optional embodiment, the limiting protrusion switches between the adjustment area and the injection area through the first notch or the second notch.

[0013] In an optional embodiment, the outer wall of the cylinder has scale lines.

[0014] In an optional embodiment, a sealing member is provided at the injection port of the barrel.

[0015] In an optional embodiment, the sealing member is a syringe inlet and outlet gasket or plug.

[0016] The utility model of the special syringe for pumping gas into arteries and veins has the following beneficial effects:

[0017] By making the cylinder and the rod core rotate relative to each other, the limit protrusion rotates to between the limit blocks. During injection, the piston is moved by pressing the pressing piece of the rod core. The distance the piston moves is limited to the distance between the limit blocks. Therefore, during injection, a fixed amount of gas is injected, thereby improving the injection accuracy.

[0018] In the second aspect, the utility model provides a special injection device for pumping gas into arteries and veins, comprising at least two syringes as described in the first aspect, and also comprising a medical three-way tube and a needle. The syringe is connected to the two ports of the medical three-way tube through a first catheter, and the other port of the medical three-way tube is connected to the needle through a second catheter.

[0019] The utility model provides a special injection device for pumping gas into arteries and veins, which has the following beneficial effects:

[0020] Different types of poisonous gases can be extracted through the setting of two syringes, and the poisonous gases can be quantitatively delivered to the medical three-way tube through the syringes and the first catheter. The medical three-way tube can selectively output the poisonous gas in one of the syringes through the second catheter and the needle, thereby realizing the quantitative output of different types of poisonous gases.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic structural diagram of the first direction of the dedicated syringe for arteriovenous gas pumping according to an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of the second direction of the dedicated syringe for arteriovenous gas pumping according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of a special syringe for pumping gas into arteries and veins in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of a dedicated injection device for arteriovenous gas pumping in an embodiment of the present utility model;

[0027] Legend:

[0028] 100. Syringe; 110. Cylinder; 111. Scale mark; 112. Injection port; 113. Seal; 114. Limiting protrusion; 115. Limiting baffle; 120. Rod core; 121. Pressing piece; 122. First notch; 123. Second notch; 124. Piston; 130. First catheter; 140. Medical tee; 150. Second catheter; 160. Needle. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first," "second," etc. in this utility model are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0033] Please refer to Figures 1 to 3 The embodiment of the present invention provides a syringe 100 for arteriovenous gas pumping, comprising a barrel 110, a rod core 120, and a piston 124. The piston 124 is fixed to one end of the rod core 120 and divides the cavity in the barrel 110 into a first cavity and a second cavity.

[0034] Typically, piston 124 is movable within cylinder 110, maintaining a sealed state with the first and second cavities during movement, and completing the gas extraction process during movement. In this embodiment, the first cavity is the cavity on the side of piston 124 near the injection port 112 of cylinder 110, and the second cavity is the cavity above piston 124 near its nozzle.

[0035] It should be noted that a seal 113 is provided at the injection port 112 of the barrel 110. This seal 113 is implemented as a syringe inlet and outlet gasket or plug. In this embodiment, the plug is used as the seal 113. This prevents the syringe from being drawn out of the syringe, i.e., by not pushing the syringe, the air inside the syringe cannot be exchanged with the outside air. Furthermore, it ensures the tightness of the barrel 110.

[0036] The rod core 120 is provided with a plurality of spaced apart limiting blocks 115 along its height direction, and a first notch 122 and a second notch 123 are also provided on the rod core 120. A limiting protrusion 114 is provided on the inner wall of the cylinder 110, and the limiting protrusion 114 switches its position in the second cavity through the first notch 122 and the second notch 123.

[0037] The limiting protrusion 114 is made to enter the side with the limiting block piece 115 through the first notch 122 through the cylinder 110 or the rod core 120, and the piston 124 is moved along the cylinder 110 by pulling the rod core 120, so that the gas (poison gas) is extracted through the injection port 112 of the cylinder 110. After the extraction is completed, the cylinder 110 and the rod core 120 are rotated relative to each other to make the limiting protrusion 114 rotate to between the two limiting blocks 115. During injection, the piston 124 is moved by pressing the pressing piece 121 of the rod core 120. The distance moved by the piston 124 is limited to the distance between the two limiting blocks 115, so that a fixed amount of gas is injected during injection, thereby improving the injection accuracy.

[0038] Optionally, the rod core 120 includes at least one plate body, which divides the second cavity into at least one adjustment area and an injection area; in this embodiment, the adjustment area is an area with a limit baffle 115, and on the contrary, the injection area is an area without a limit baffle 115. When the limit protrusion 114 is located in the injection area, the pressing plate 121 can be used as a traditional syringe.

[0039] Furthermore, the first notch 122 and the second notch 123 are provided on the side of the plate body, and the adjustment area and the injection area are connected through the first notch 122 and the second notch 123;

[0040] The limiting blocks 115 are disposed in the adjustment area and distributed along the height direction of the plate.

[0041] The first notch 122 is arranged on the side of the rod core 120 close to the top, and the second notch 123 is arranged on the side close to the piston 124. Through the arrangement of the first notch 122 and the second notch 123, the limiting protrusion 114 can switch between the injection area and the adjustment area whether there is toxic gas or not in the first cavity, thereby improving applicability.

[0042] It should be noted that the limiting blocks 115 can be evenly or unevenly distributed along the height of the plate. The limiting blocks 115 are disposed in the area between the first notch 122 and the second notch 123. For example, when the limiting blocks 115 are evenly distributed along the height of the plate, a fixed amount of gas can be delivered by moving the limiting protrusion 114 between the limiting blocks 115 and then performing the injection operation. When the limiting blocks 115 are unevenly distributed along the height of the plate, for example, the spacing between the limiting blocks 115 increases, the limiting protrusion 114 can be adjusted to the corresponding position between the limiting blocks 115 according to the desired injection volume to deliver a fixed amount of gas during injection.

[0043] Furthermore, the limiting protrusion 114 switches between the adjustment area and the injection area through the first notch 122 or the second notch 123. In actual operation, when the gas is injected as needed, for example, when the gas needs to be discharged at one time, by adjusting the limiting protrusion 114 to the injection area, the pressing piece 121 can be directly pressed to discharge the gas.

[0044] Furthermore, the outer wall of the cylinder 110 has scale lines 111. The scale lines 111 are provided to facilitate observation by the operator.

[0045] like Figure 4 As shown, an embodiment of the present invention also provides a special injection device for pumping gas into arteries and veins, including at least two of the above-mentioned syringes 100, and also including a medical three-way tube 140 and a needle 160. The syringe 100 is connected to the two ports of the medical three-way tube 140 through a first catheter 130, and the other port of the medical three-way tube 140 is connected to the needle 160 through a second catheter 150.

[0046] Different types of poisonous gases can be extracted by setting up two syringes 100, and the poisonous gases can be quantitatively delivered to the medical three-way tube 140 through the syringes 100 and the first conduit 130. The medical three-way tube 140 can selectively output the poisonous gas in one of the syringes 100 through the second conduit 150 and the needle 160, thereby realizing the quantitative output of different types of poisonous gases.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A special syringe for arteriovenous gas pumping, characterized in that: It comprises a cylinder (110), a rod core (120), and a piston (124), wherein the piston (124) is fixed to one end of the rod core (120) and divides the cavity in the cylinder (110) into a first cavity and a second cavity; The rod core (120) is provided with a plurality of spaced-apart limiting blocks (115) along its height direction, and a first notch (122) and a second notch (123) are also provided on the rod core (120). A limiting protrusion (114) is provided on the inner wall of the cylinder (110), and the limiting protrusion (114) switches its position in the second cavity through the first notch (122) and the second notch (123).

2. The special syringe for arteriovenous gas pumping according to claim 1, characterized in that: The rod core (120) comprises at least one plate body, and the plate body separates the second cavity into at least one adjustment area and an injection area; The first notch (122) and the second notch (123) are arranged on the side of the plate body, and the adjustment area and the injection area are connected through the first notch (122) and the second notch (123); The limiting baffles (115) are arranged in the adjustment area and distributed along the height direction of the plate body.

3. The special syringe for arteriovenous gas pumping according to claim 2, characterized in that: The limiting blocks (115) are evenly distributed or unevenly distributed in the height direction of the plate body.

4. The special syringe for arteriovenous gas pumping according to claim 2, characterized in that: The limiting block (115) is arranged in the area between the first notch (122) and the second notch (123).

5. The special syringe for arteriovenous gas pumping according to claim 2, characterized in that: The limiting protrusion (114) switches between the regulating area and the injection area via the first notch (122) or the second notch (123).

6. The special syringe for arteriovenous gas pumping according to claim 1, characterized in that: The outer wall of the cylinder (110) has scale lines (111).

7. The special syringe for arteriovenous gas pumping according to claim 1, characterized in that: A sealing member (113) is provided at the injection port (112) of the barrel (110).

8. The special syringe for arteriovenous gas pumping according to claim 7, characterized in that: The sealing member (113) is a syringe inlet and outlet gasket or a plug.

9. A special injection device for arteriovenous gas pumping, characterized in that: The invention comprises at least two syringes according to any one of claims 1 to 8, and further comprises a medical three-way tube (140) and a needle (160), wherein the syringe is connected to two ports of the medical three-way tube (140) through a first conduit (130), and the other port of the medical three-way tube (140) is connected to the needle (160) through a second conduit (150).

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