Exhaust type injector

Abstract

The utility model discloses an exhaust type syringe which comprises a first syringe body, a remaining needle head, a hose, a cut-off clamp and a second syringe body, the remaining needle head is installed on a piston of the first syringe body, and the liquid inlet end of the remaining needle head is communicated with a containing cavity of the first syringe body. The two ends of the hose are communicated with the liquid outlet end of the indwelling needle and the liquid inlet end of the second injector respectively, and the cut-off clamp is installed on the hose. The injector can be assembled through existing medical consumables, materials are easy to obtain, assembling is simple, the clinical use cost is reduced, suction negative pressure generated by the second injector is used for breaking pressure balance in the first injector, bubbles in the first injector can be rapidly sucked out through the negative pressure, the first injector shrinks at the same time, and the injection efficiency is improved. And the bubble discharging work is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary appliances, in particular to an exhaust syringe. Background Art

[0002] Coronary heart disease is a type of ischemic heart disease mainly caused by atherosclerosis of the blood vessel wall, with morphological changes such as coronary artery stenosis or occlusion, and is the leading cause of death worldwide. Mastering the pathogenesis of coronary heart disease is crucial for the prevention, diagnosis, and treatment of coronary heart disease. When studying the pathogenesis and clinical manifestations of patients with coronary heart disease, coronary angiography is generally required for patients. When performing coronary angiography, a contrast agent needs to be injected into the patient. Generally, a syringe is used to draw the contrast agent and inject it into the patient's body.

[0003] When injecting the contrast agent with a syringe, the phenomenon of air bubbles often occurs. Air bubbles are fatal for arterial injection because the air in the syringe barrel is not exhausted, or there are certain air bubbles in the contrast agent, or air is mixed in during the extraction process. Due to the above reasons, it is difficult to avoid the generation of air bubbles in the syringe barrel, and only the number of air bubbles can be reduced as much as possible during operation.

[0004] Therefore, in order to better eliminate or reduce the air bubble content. Currently, various syringes that can exclude air bubbles have been introduced. For example, the Chinese utility model patent with the publication number CN213911784U and the name of a syringe with an exhaust device sets an inclined surface at one end of the syringe nipple. An exhaust device (a double-layer water-blocking and air-permeable membrane) is set at the higher position of the inclined surface, and a nipple is set at the lower position of the inclined surface. The syringe is erected to make the air bubbles float and discharged through the exhaust device. When this syringe exhausts air, especially for high-density contrast agents with high atomic weight and large specific gravity, the contrast agent has a "blocking force" on the air bubbles. Moreover, when the internal pressure of the syringe is not greater than the external pressure, affected by the air pressure, it is very difficult or slow for the air bubbles to naturally pass through the water-blocking and air-permeable membrane of the exhaust device. If force is applied to increase the internal pressure, the injection agent will surely flow out from the nipple. In addition, the structural composition of this syringe, such as the syringe needle part and the exhaust device part, is complex, and the production process is difficult, which is not suitable for low-cost medical use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an exhaust syringe to solve the problems that the existing syringe is inconvenient to exhaust air bubbles, and the structure of the syringe is complex and not suitable for low-cost medical use.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An exhaust syringe, comprising a first syringe, a indwelling needle, a hose, a stop card and a second syringe, wherein the indwelling needle is mounted on the piston of the first syringe, and the liquid inlet end of the indwelling needle is communicated with the cavity of the first syringe, both ends of the hose are respectively communicated with the liquid outlet end of the indwelling needle and the liquid inlet end of the second syringe, and the stop card is mounted on the hose.

[0008] A further technical solution is that a one-way valve is arranged between the second syringe and the hose.

[0009] A further technical solution is that an eccentric cone is arranged on the surface of the piston in contact with the liquid, and the nipple end of the first syringe is arranged as an eccentric concave shape adapted to the eccentric cone.

[0010] A further technical solution is that the liquid inlet end of the indwelling needle passes through the highest point of the eccentric cone.

[0011] A further technical solution is that the hose and the piston shaft of the first syringe are fixed by adhesive tape.

[0012] A further technical solution is that the cross section of the piston shaft is cross-shaped, and the hose is located in the groove of the piston shaft.

[0013] Compared with the prior art, at least one of the following beneficial effects can be achieved by the present utility model:

[0014] The present utility model provides an exhaust syringe, which can be assembled by using existing medical consumables, with easy-to-obtain materials and simple assembly, reducing the clinical use cost. Moreover, by using the suction negative pressure generated by the second syringe to break the pressure balance in the first syringe, the air bubbles inside the first syringe can be quickly sucked out by the negative pressure, and at the same time, the first syringe shrinks to complete the air bubble discharge work. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of an exhaust syringe according to the present utility model.

[0016] Figure 2 For the present utility model Figure 1 is a schematic structural diagram of the first syringe.

[0017] Figure 3 For the present utility model Figure 1 is a schematic structural diagram of the piston.

[0018] Reference numerals: 1, first syringe; 2, indwelling needle; 3, hose; 4, stop card; 5, second syringe; 6, piston; 7, one-way valve; 8, eccentric cone; 9, piston shaft; 10, adhesive tape. Detailed Description of the Invention

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0022] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected with" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Example 1:

[0026] As shown in this example Figure 1 A kind of exhaust syringe includes a first syringe 1, a indwelling needle 2, a hose 3, a cut-off card 4 and a second syringe 5. The indwelling needle 2 is installed on the piston 6 of the first syringe 1, and the liquid inlet end of the indwelling needle 2 is communicated with the cavity of the first syringe 1. Both ends of the hose 3 are respectively communicated with the liquid outlet end of the indwelling needle 2 and the liquid inlet end of the second syringe 5. The cut-off card 4 is installed on the hose 3.

[0027] The indwelling needle 2 penetrates through the piston 6 of the first syringe 1 and is communicated with the hose 3. When using the first syringe 1 to draw the injection agent, first close the hose 3 through the cut-off card 4, and then draw the injection agent into the barrel of the first syringe 1. At this time, hold the first syringe 1 upright so that the air bubbles float up to the piston 6. If there are air bubbles adhering to the barrel wall or difficult to float up, you can tap the barrel with your finger to promote the floating of the air bubbles and reduce the residual air bubbles in the barrel. Then connect the second syringe 5 with the outer end of the hose 3, release the closure of the cut-off card 4 on the cut-off card 4, and pull the second syringe 5. Utilize the suction negative pressure generated by the second syringe 5 to break the pressure balance in the first syringe, and the air bubbles inside the first syringe can be quickly sucked out by the negative pressure, and the first syringe contracts at the same time to complete the air bubble discharge work.

[0028] Preferably, a one-way valve 7 is arranged between the second syringe 5 and the hose 3.

[0029] The one-way valve 7 is a medical plastic check valve (non-return valve) to prevent air from entering the first syringe 1 due to misoperation or too small pressure in the first syringe 1.

[0030] Example 2:

[0031] On the basis of the above embodiment, as shown in this example Figure 2 and Figure 3 An eccentric cone 8 is arranged on the surface of the piston 6 in contact with the liquid, and the nipple end of the first syringe 1 is set as an eccentric concave shape adapted to the eccentric cone 8. The liquid inlet end of the indwelling needle 2 passes through the highest point of the eccentric cone 8.

[0032] The eccentric cone 8 can make the floating air bubbles float on one side of the piston 6 after floating, which is convenient for the collection and discharge of the air bubbles.

[0033] Preferably, the hose 3 and the piston shaft 9 of the first syringe 1 are fixed by an adhesive tape 10.

[0034] The adhesive tape 10 is used to fix the hose 3 and the piston shaft 9.

[0035] Preferably, the cross-section of the piston shaft 9 is cross-shaped, and the hose 3 is located in the groove of the piston shaft 9.

[0036] Prevent the hose 3 and the piston shaft 9 from occupying too much space and further strengthen the fixation of the hose 3.

[0037] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An exhaust syringe, characterized in that: It includes a first syringe (1), an indwelling needle (2), a hose (3), a stop card (4) and a second syringe (5). The indwelling needle (2) is installed on the piston (6) of the first syringe (1), and the liquid inlet end of the indwelling needle (2) is communicated with the cavity of the first syringe (1). The two ends of the hose (3) are respectively communicated with the liquid outlet end of the indwelling needle (2) and the liquid inlet end of the second syringe (5). The stop card (4) is installed on the hose (3).

2. The exhaust syringe according to claim 1, characterized in that: A one-way valve (7) is provided between the second syringe (5) and the hose (3).

3. The exhaust syringe according to claim 1, wherein: An eccentric cone (8) is provided on the surface of the piston (6) in contact with the liquid, and the nipple end of the first syringe (1) is provided with an eccentric concave shape adapted to the eccentric cone (8).

4. The exhaust syringe according to claim 3, characterized in that: The liquid inlet end of the indwelling needle (2) passes through the highest point of the eccentric cone (8).

5. The exhaust syringe according to claim 1, wherein: The hose (3) and the piston shaft (9) of the first syringe (1) are fixed by an adhesive tape (10).

6. The exhaust syringe according to claim 5, characterized in that: The cross-section of the piston shaft (9) is cross-shaped, and the hose (3) is located in the groove of the piston shaft (9).

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