CN209933708U - Hyperfine syringe needle - Google Patents

Abstract

The utility model discloses an ultra-fine injection needle head, which comprises a needle cap, a needle tube, a conduit and a connecting part, wherein the needle cap is fixedly connected with the connecting part, the front end of the connecting part is fixedly connected with the needle tube, a threaded hole is arranged inside the connecting part, two ends of the threaded hole are respectively communicated with the needle tube and the needle cap, a hollow hole is arranged in the middle of the side wall of the connecting part and penetrates through the side wall of the connecting part, a threaded rod is arranged in the threaded hole, a through hole is arranged inside the threaded rod along the central axis, the conduit is sleeved inside the needle tube, one end of the conduit is fixedly connected in the middle of the end part of the threaded rod, an anti-skid hand wheel is arranged in the middle of the outer wall of the thread, and the surface of the anti-skid hand wheel is provided with an anti-skid bulge, the, can prevent the catheter from being broken and remained in the body of the patient to cause injury.

Description

Hyperfine syringe needle

Technical Field

The utility model relates to a retina tissue puncture injection technical field specifically belongs to a hyperfine syringe needle.

Background

Retinal degeneration is the main cause of irreversible blinding diseases, and mainly comprises age-related macular degeneration, retinitis pigmentosa and Stargardt disease. There are approximately 3 million to 5 million age-related macular degeneration patients worldwide, and approximately 1 million retinitis pigmentosa patients. At present, the number of age-related macular degeneration patients in China is about more than 2000 thousands, and is expected to be doubled in 2050. Since retinal degenerative changes are mainly manifested as lesions of the macular Retinal Pigment Epithelium (RPE), replacement transplantation therapy of regenerative medicine RPE cells has become the main direction of therapeutic research.

At present, clinicians or researchers are often used for the puncture injection device in the subretinal space, the needle diameter is thicker, the retinal vessel diameter is smaller than 100 microns, the thicker needle cannot puncture the retinal vessel, some doctors can puncture by using a thinner glass catheter, the glass catheter is easy to break, so that the glass catheter remains in the eyeball of a patient, the patient is injured, medicaments are required to be injected into different depths of the retina at times, and the length adjustment of the needle is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model discloses a hyperfine syringe needle, this utility model can be used to injection medicine or cell turbid liquid under the retina to and the retinal blood vessel puncture injection of pipe diameter 100 microns below, be difficult to the rupture simultaneously, avoided remaining in the patient internal because of the pipe rupture.

In order to achieve the technical purpose, the above technical effects are achieved, and the utility model discloses a realize through following technical scheme:

the utility model provides a hyperfine syringe needle, includes needle cap, needle tubing, pipe and connecting portion, its characterized in that:

the needle cap is fixedly connected with the connecting portion, the front end of the connecting portion is fixedly connected with the needle tube, a threaded hole is formed in the connecting portion, two ends of the threaded hole are respectively communicated with the needle tube and the needle cap, a hollowed hole is formed in the middle of the side wall of the connecting portion and penetrates through the side wall of the connecting portion, a threaded rod is installed in the threaded hole, a through hole is formed in the threaded rod along the central axis, the catheter is sleeved inside the needle tube, one end of the catheter is fixedly connected to the middle of the end portion of the threaded rod and communicated with the through hole, an anti-skidding hand wheel is arranged in the middle of the outer wall of the threaded rod, anti-skidding protrusions are arranged on the surface of the anti-skidding hand wheel, the length of the catheter is larger than the length of the needle tube.

Further, the needle tube is 23gauge, 25gauge or 27 gauge.

Furthermore, the length of the catheter extending out of the needle tube is 0.5-1.0 cm.

The utility model has the advantages that: the utility model discloses an use the polyimide pipe to place in the needle tubing, polyimide pipe diameter is 45-55 microns, can be used to injection medicine or cell turbid liquid under the retina to and the puncture injection that retinal blood vessel pipe diameter is less than 100 microns, the pipe of polyimide material is difficult to the rupture simultaneously, can prevent that the pipe rupture from remaining and causing the injury in the patient body, simultaneously, can adjust the length that the pipe stretches out the needle tubing through rotating the threaded rod, can be used for the retina injection of the different degree of depth.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the hyperfine injection needle.

Fig. 2 is a schematic sectional view of the hyperfine injection needle.

In the drawings, the names of the components represented by the respective reference numerals are listed as follows:

1-needle cap, 2-connecting part, 3-needle tube, 4-conduit, 5-threaded rod, 6-hollowed hole, 7-anti-skid hand wheel, 8-threaded hole and 9-through hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, a hyperfine injection needle includes a needle cap 1, a needle tube 3, a catheter 4 and a connection part 2, and is characterized in that:

the needle cap 1 is fixedly connected with the connecting part 2, the front end of the connecting part 2 is fixedly connected with the needle tube 3, a threaded hole 8 is arranged in the connecting part 2, two ends of the threaded hole 8 are respectively communicated with the needle tube 3 and the needle cap 1, a hollowed hole 6 is arranged in the middle of the side wall of the connecting part 2 and penetrates through the side wall of the connecting part 2, a threaded rod 5 is installed in the threaded hole 8, a through hole 9 is arranged in the threaded rod 5 along the central axis, the catheter 4 is sleeved in the needle tube 3, one end of the catheter 4 is fixedly connected in the middle of the end part of the threaded rod 5 and communicated with the through hole 9, an anti-skid hand wheel 7 is arranged in the middle of the outer wall of the threaded hole, anti-skid protrusions are arranged on the surface of the anti-skid hand wheel 7, the length of the catheter 4 is greater than, the diameter of the conduit 4 is 45-55 microns, and polyimide is used as a material.

Further, the needle tube 3 is 23gauge, 25gauge or 27 gauge.

Further, the length of the conduit 4 extending out of the needle tube 3 is 0.5-1.0 cm.

A concrete application of the utility model is that: when in use, the needle cap 1 of the utility model is connected with an injector, the injector can be filled with a thrombolytic agent which is mainly used for treating subretinal hemorrhage, retinal artery and vein obstruction, and the injector can be filled with stem cell suspension which is mainly used for treating retinitis pigmentosa and macular degeneration.

The utility model discloses an use polyimide pipe 4 to place in needle tubing 3, polyimide pipe 4 diameter is 45-55 microns, can be used to the puncture injection that retinal blood vessel pipe diameter is less than 100 microns, polyimide material has good mechanical properties simultaneously, high tensile strength, be difficult to the rupture, can prevent that pipe 4 rupture from remaining and causing the injury in the patient body, need inject darker retina position sometimes, consequently can rotate threaded rod 5 through operation anti-skidding hand wheel 7, threaded rod 5 is the 8 interior back-and-forth movements of screw hole in connecting portion 2, thereby adjust the length that pipe 4 stretches out needle tubing 3, can inject the medicament to the darker position of retina.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching.

Claims (3)

1. The utility model provides a hyperfine syringe needle, includes needle cap, needle tubing, pipe and connecting portion, its characterized in that:

the needle cap is fixedly connected with the connecting portion, the front end of the connecting portion is fixedly connected with the needle tube, a threaded hole is formed in the connecting portion, two ends of the threaded hole are respectively communicated with the needle tube and the needle cap, a hollowed hole is formed in the middle of the side wall of the connecting portion and penetrates through the side wall of the connecting portion, a threaded rod is installed in the threaded hole, a through hole is formed in the threaded rod along the central axis, the catheter is sleeved inside the needle tube, one end of the catheter is fixedly connected to the middle of the end portion of the threaded rod and communicated with the through hole, an anti-skidding hand wheel is arranged in the middle of the outer wall of the threaded rod, anti-skidding protrusions are arranged on the surface of the anti-skidding hand wheel, the length of the catheter is larger than the length of the needle tube.

2. The hyperfine injection needle of claim 1, wherein: the needle tube is 23gauge, 25gauge or 27 gauge.

3. The hyperfine injection needle of claim 1, wherein: the length of the catheter extending out of the needle tube is 0.5-1.0 cm.

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