Light-proof injector

Abstract

The utility model provides a lucifugal syringe which is used for injecting medical adhesive, the lucifugal syringe comprises a syringe cylinder, a piston, a core rod and an injection needle, the front end of the syringe cylinder is provided with an injection needle seat, the rear end of the injection needle is detachably connected with the injection needle seat, the syringe cylinder, the injection needle seat and the injection needle are all lucifugal, and the piston is arranged in the syringe cylinder. The front end part of the injection needle is a bendable part, an angle is formed between the bendable part and the axis of the injection needle, and the front end part of the bendable part is circular. According to the injector provided by the utility model, the front end of the injection needle is designed to be circular and is consistent with the injection needle in order to avoid the situation that the injector can be used for the photo-induced adhesive, and the front end is provided with a bent part at one end, so that the adhesive pushed out by the injector does not generate bubbles.

Description

Technical Field

[0001] The utility model belongs to a light-proof syringe, in particular to a light-proof syringe. Background Art

[0002] The dura mater is the outermost layer of the surface membrane of the brain and spinal cord and is a connective tissue fibrous membrane. As a protective structure, the dura mater is often accompanied by cerebrospinal fluid leakage when it is damaged, that is, the cerebrospinal fluid leaks from the gap in the dura mater and the bone defect covered by it under the action of the pressure gradient inside and outside the skull and spinal canal. According to the cause, the clinical classification of cerebrospinal fluid leakage can be divided into: traumatic cerebrospinal fluid leakage, postoperative cerebrospinal fluid leakage and idiopathic cerebrospinal fluid leakage, among which postoperative cerebrospinal fluid leakage is one of the common complications of neurosurgery and spinal surgery. There is currently a method of repairing the dura mater using fibrin adhesive, i.e., human-derived medical biological protein adhesive, porcine-derived medical biological protein adhesive or occluding agent (hydrogel, composite adhesive, etc.).

[0003] There are many adhesive syringes (guns) on the market, but the surgical area for repairing the dura mater (spinal) is relatively narrow, long and deep, and the current adhesive syringes (guns) are not very suitable.

[0004] In clinical practice, many syringes are mostly used for intravenous injections, where the front end of the syringe is connected to the patient's vein for infusion. The front end of the intravenous needle is usually conical, which is convenient for intravenous injection, but is not suitable for current medical adhesives. Utility Model Content

[0005] In response to the above technical problems, the utility model provides a light-proof syringe for injecting medical adhesives. The front end of the injection needle is designed to be round, consistent with the shape of the injection needle, and the front end has a curved part at one end, so that the adhesive pushed out by the syringe will not produce bubbles.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A light-proof syringe is used for injecting medical adhesives. The light-proof syringe comprises a syringe barrel, a piston, a core rod and an injection needle. The front end of the syringe barrel is provided with an injection needle seat, and the rear end of the injection needle is detachably connected to the injection needle seat. The syringe barrel, the injection needle seat and the injection needle are all light-proof. The front end portion of the injection needle is a bendable portion, and the bendable portion forms an angle with the axis of the injection needle, and the front end end portion of the bendable portion is circular.

[0008] Preferably, the angle between the bendable portion and the axis of the injection needle is 0-45°.

[0009] Preferably, the length of the bendable portion accounts for 1 / 3 of the length of the injection needle.

[0010] Preferably, the diameter of the injection needle is 2-5 mm.

[0011] Preferably, the injection needle is 30 cm long.

[0012] Preferably, the inner wall or outer wall of the syringe barrel and the injection needle seat are coated with a light-proof coating.

[0013] Preferably, the light-shielding coating is an opaque medical-grade material.

[0014] Preferably, the light-proof syringe is a 5 mL or 10 mL syringe.

[0015] Preferably, the rear end of the injection needle is Luer-connected to the injection needle seat.

[0016] Due to the adoption of the above technical solution, the utility model has the following advantages and positive effects compared with the prior art:

[0017] The light-proof syringe provided by the utility model has a syringe barrel, a needle holder and a needle that are all designed to be light-proof, so that it can be used to inject light-induced curing biological adhesives; at the same time, the needle is designed to be used in narrow and long surgical areas, such as the cranial cavity, spinal canal, abdominal cavity and pelvic floor and other surgical areas, and the front end of the needle is a relatively rounded design, and the front end of the needle is a bendable part, and the bendable part and the axis of the needle are at an angle to each other, so that the adhesive pushed out by the syringe can avoid containing bubbles, resulting in low strength after curing. Therefore, the light-proof syringe provided by the utility model is particularly suitable for light-induced curing adhesives, and is also suitable for narrow and long surgical areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a light-proof syringe of the utility model;

[0019] Figure 2 It is a schematic diagram of the injection needle of the present invention.

[0020] Description of reference numerals: 1-syringe barrel; 11-injection needle seat; 2-piston; 3-core rod; 4-injection needle; 41-rear end of injection needle; 42-bendable portion; 43-front end of bendable portion DETAILED DESCRIPTION

[0021] The light-proof syringe proposed by the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the utility model will become clearer according to the following description.

[0022] See also Figure 1-2A light-proof syringe is used for injecting medical adhesives and is suitable for narrow and long surgical areas such as cranial cavity, spinal canal, abdominal cavity and pelvic floor. The light-proof syringe comprises a syringe barrel 1, a piston 2, a core rod 3 and an injection needle 4. The piston 2 is installed in front of the core rod 3 and can be driven by the core rod 3 to move back and forth in the syringe barrel 1. An injection needle seat 11 is provided at the front end of the syringe barrel 1 for connecting the injection needle 4. The rear end 41 of the injection needle 4 is detachably connected to the injection needle seat 11, for example, the rear end 41 of the injection needle 4 is threadedly connected to the injection needle seat 11, or the rear end 41 of the injection needle 4 can be Luer-connected to the injection needle seat 11. Considering the sealing performance, it is preferred that the rear end 41 of the injection needle 4 is Luer-connected to the injection needle seat 11.

[0023] The syringe barrel 1, the injection needle seat 11, and the injection needle 4 are all light-proof. For example, the syringe barrel 1 and the injection needle seat 11 are made of two or more layers of raw materials by composite injection molding, one of which is an opaque medical-grade plastic to ensure light protection, or a light-proof coating is directly coated on the inner or outer wall of the syringe barrel 1, the injection needle seat 11, and the injection needle 4. Preferably, the inner or outer wall of the syringe barrel 1, the injection needle seat 11, and the injection needle 4 are all coated with a light-proof coating, and the light-proof coating is an opaque medical-grade material.

[0024] The front end of the injection needle 4 is a bendable portion 42, and the bendable portion 42 and the axis of the injection needle 4 form an angle α, and further the angle α between the bendable portion 42 and the axis of the injection needle 4 is 0-45°. The front end 43 of the bendable portion 42, i.e., the front end of the injection needle 4, is circular. With this design of the injection needle 4, the adhesive pushed out does not contain bubbles, ensuring that the cured adhesive does not contain gas, thereby ensuring the strength of the adhesive. The injection needle 4 can be made of plastic metal or plastic material.

[0025] The injection needle and the injection needle seat are detachably connected, that is, the injection needle and the syringe barrel are detachably connected. In normal areas of open surgery, the adhesive can be directly injected into the syringe barrel. For narrow and long surgical areas such as the cranial cavity, spinal canal, abdominal cavity and pelvic floor, for example, the skull base of dura mater repair surgery, injection needle injection is required.

[0026] In order to be better applied to narrow and long surgical areas such as dura mater repair, the injection needle 4 is 30 cm long, which allows the injection needle 4 to extend into the skull base, wherein the length of the bendable portion 42 is 10 mm.

[0027] The injection needle 4 has a diameter of 2-5 mm, for example, a diameter of 2 mm, 3 mm, 4 mm, 5 mm, preferably 2 mm and 5 mm.

[0028] Usually the light-proof syringe is a 5mL or 10mL syringe. Generally, the syringe barrel 1 is pre-installed with adhesive, and the rear end tube mouth and the front end injection needle seat 11 have a tin foil sealing layer.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they still fall within the protection scope of the present invention.

Claims

1. A light-proof syringe for injecting medical adhesives, the light-proof syringe comprising a syringe barrel, a piston, a core rod and an injection needle, the front end of the syringe barrel is provided with an injection needle seat, the rear end of the injection needle is detachably connected to the injection needle seat, characterized in that: The syringe barrel, injection needle seat and injection needle are all light-proof. The front end of the injection needle is a bendable part. The bendable part and the axis of the injection needle form an angle with each other. The front end of the bendable part is circular.

2. The light-proof syringe according to claim 1, characterized in that: The angle between the bendable portion and the axis of the injection needle is 0-45°.

3. The light-proof syringe according to claim 1, characterized in that: The length of the bendable portion accounts for 1 / 3 of the length of the injection needle.

4. The light-proof syringe according to claim 1, characterized in that: The diameter of the injection needle is 2-5 mm.

5. The light-proof syringe according to claim 1 or 4, characterized in that: The length of the injection needle is 30 cm.

6. The light-proof syringe according to claim 1, characterized in that: The inner wall or outer wall of the syringe barrel and the injection needle seat are coated with a light-proof coating.

7. The light-proof syringe according to claim 6, characterized in that: The light-proof coating is an opaque medical-grade material.

8. The light-proof syringe according to claim 1, characterized in that: The light-proof syringe is a 5mL or 10mL syringe.

9. The light-proof syringe according to claim 1, characterized in that: The rear end of the injection needle is Luer-connected to the injection needle seat.

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