CN214909111U - Novel trace vitreous chamber medicine syringe - Google Patents
Novel trace vitreous chamber medicine syringe Download PDFInfo
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- CN214909111U CN214909111U CN202023279420.8U CN202023279420U CN214909111U CN 214909111 U CN214909111 U CN 214909111U CN 202023279420 U CN202023279420 U CN 202023279420U CN 214909111 U CN214909111 U CN 214909111U
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Abstract
The utility model relates to a novel micro-vitreous cavity drug injector, which comprises a needle cylinder, a needle core, a needle head and a needle cap, wherein the outer wall of the needle cylinder is provided with scale marks, the needle core is arranged in the needle cylinder in a sliding way, and the needle head is fixedly arranged at one end of the needle cylinder; the needle cap is buckled at one end of the needle cylinder and comprises a buckling section, a protruding section and a positioning section which are integrally formed, and the positioning section is arranged at one end of the buckling section; the upper side and the lower side of the positioning section are symmetrically concave downwards and are flat, three spine-shaped protrusions distributed at intervals are arranged on the positioning section and used for determining a puncture position, the spine-shaped protrusions are located at the junction of the lower concave surfaces on the two sides, and the vertical distance between every two adjacent spine-shaped protrusions is 3.00mm and 4.00mm respectively. The utility model discloses collect injection and locate function as an organic whole, thorn form is protruding can be used to accurate positioning injection position, ensures the accuracy of syringe needle position of inserting needles, and effectual supplementary doctor operates, improves the operation precision, has good practicality.
Description
Technical Field
The utility model relates to the technical field of eye medical equipment, in particular to a novel micro-vitreous cavity drug injector.
Background
The vitreous cavity injection is a treatment technology for injecting liquid or suspension form medicine into the vitreous cavity, and is suitable for treating posterior segment diseases of eyes, particularly intraocular neovascular diseases, macular edema, infectious/non-infectious inflammatory reactions and the like caused by various reasons.
Taking the most applied intraocular neovascular diseases as an example at present, the adopted anti-VEGF medicament is used as a treatment medicament and is expensive, the dosage of the medicament injected into eyes is usually 0.05-0.1ml, so the requirement of micro-injection needs to be met for an injector, the common injector is a split injector of a needle cylinder and a needle head, a certain cavity exists between the needle cylinder and the needle head, and the amount of the liquid left at the joint of the needle cylinder and the needle head is about 0.06ml through multiple tests, thereby causing obvious medicament waste.
When the injector is used for vitreous cavity injection surgery, the needle insertion point can be accurately positioned by matching with an ophthalmic ruler. The accurate control of the needle insertion point and the needle insertion depth in the operation is a key link, and once deviation occurs in the needle insertion position or the needle insertion depth, the needle can stab crystalline lens or retina to cause iatrogenic cataract or iatrogenic retinal hole, vitreous blood volume and even retinal detachment.
In view of the above reasons, some doctors adopt a blind-hit mode of visual distance, i.e., rely on the experience and operation skill of doctors to inject medicine, which is an important reason for surgical complications such as iatrogenic cataract, iatrogenic retinal hole or vitreous hemorrhage. Therefore, a novel micro-vitreous cavity medicine injector is provided.
Disclosure of Invention
The utility model provides a solve the inconvenient accurate problem of deciding the needle point of advancing, provide a novel trace vitreous chamber medicine syringe, through the rational design to the syringe structure, can convenient accurate definite needle point of advancing, supplementary doctor's operation of advancing.
In order to achieve the above object, the utility model adopts the following technical scheme:
a novel micro-vitreous cavity medicine injector comprises a needle cylinder, a needle core, a needle head and a needle cap, wherein scale marks are arranged on the outer wall of the needle cylinder, the needle core is arranged in the needle cylinder in a sliding mode, the needle head is fixedly arranged at one end of the needle cylinder, and the needle head penetrates into the needle cylinder and is flush with the inner end face of the needle cylinder;
the needle cap is buckled at one end of the needle cylinder and is sleeved outside the needle head, the needle cap comprises a buckling section, a protruding section and a positioning section which are integrally formed, the buckling section and the protruding section are connected and combined to form a stepped shaft shape, and the positioning section is arranged at one end of the buckling section;
the upper side and the lower side of the positioning section are symmetrically concave downwards and are flat, the lower concave surface of the positioning section is an arc-shaped surface, three spine-shaped protrusions distributed at intervals are arranged on the positioning section and used for determining a puncture position, the spine-shaped protrusions are located at the junction of the lower concave surfaces on the two sides, and the vertical distance between every two adjacent spine-shaped protrusions is 3.00mm and 4.00mm respectively.
Furthermore, the needle cylinder and the needle cap are made of polymer composite materials, and the needle head is of a hollow metal tube structure made of composite metal materials.
Further, the unit scale of the graduation mark is ml, and the graduation mark is 0.025ml per grid so as to calculate the injection dose.
Furthermore, the stylet comprises a pressing part, a push rod part and a rubber part, one end of the push rod part is arranged outside the needle cylinder and connected with the pressing part, the other end of the push rod part is arranged inside the needle cylinder and connected with the rubber part, and the rubber part is cylindrical and clings to the inner wall of the needle cylinder.
Furthermore, syringe one end is provided with connecting portion, connecting portion and syringe integrated into one piece, the connecting portion internal fixation is worn to be equipped with the syringe needle, and syringe needle one end passes connecting portion and flushes with the interior terminal surface of syringe.
Furthermore, the buckling section is of a hollow cylindrical structure, the buckling section is buckled on the connecting part, and the outer diameter of the buckling section is the same as that of the needle cylinder.
Through the technical scheme, the beneficial effects of the utility model are that:
the utility model has the advantages of reasonable design, the syringe collects the injection and locate function as an organic whole, and the three thorn of needle cap front end form is protruding can be used to accurate positioning injection position, fixes a position the puncture needle insertion point promptly, ensures the accuracy of syringe needle insertion position, and the doctor can operate the operation according to the needle insertion point, improves the operation precision, has greatly reduced because experience is not enough or the operation is not normal to lead to the intraocular injection cataract and the risk of complication such as retinal hole/break away from.
The utility model discloses cylinder cooperation needle cap uses can be direct, accurate location and carries out the vitreous chamber injection, and convenient operation is swift, need not to use dedicated ophthalmology scale, has simplified operating procedure, has improved operation efficiency, and accords with the characteristics that vitreous chamber injection art list time is short, the operation volume is big in the eye, can extensively popularize and apply at ophthalmology.
Drawings
Fig. 1 is a front view of the novel micro-vitreous cavity drug injector of the present invention.
Fig. 2 is a top view of the novel micro-vitreous chamber drug injector of the present invention.
Fig. 3 is an enlarged schematic view of the positioning section of the novel micro-vitreous cavity drug injector of the present invention.
Fig. 4 is a schematic view showing the separation of the needle cylinder and the needle cap of the novel micro-vitreous cavity drug injector of the present invention.
The reference numbers in the drawings are as follows: 1 is a needle cylinder, 2 is a needle core, 21 is a pressing part, 22 is a push rod part, 23 is a rubber part, 3 is a needle head, 4 is a needle cap, 41 is a buckling section, 42 is a convex section, 43 is a positioning section, 5 is a scale mark, 6 is a thorn-shaped bulge, and 7 is a connecting part.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:
as shown in fig. 1-4, a novel micro-vitreous cavity drug injector comprises a needle cylinder 1, a needle core 2, a needle head 3 and a needle cap 4, wherein scale marks 5 are arranged on the outer wall of the needle cylinder 1, the unit scale of the scale marks 5 is ml, and each grid of the scale marks 5 is 0.025ml, so that the micro-vitreous cavity drug injector meets the micro-injection requirement and is convenient for calculating the injection dosage during drug injection.
In this embodiment, the stylet 2 is slidably disposed in the needle cylinder 1, the stylet 2 includes a pressing portion 21, a pushing portion 22 and a rubber portion 23, the cross section of the pushing portion 22 is cross-shaped, one end of the pushing portion 22 is disposed outside the needle cylinder 1 and connected to the pressing portion 21, the pressing portion 21 is circular, the other end of the pushing portion 22 is disposed inside the needle cylinder 1 and connected to the rubber portion 23, and the rubber portion 23 is cylindrical and clings to the inner wall of the needle cylinder 1;
the pushing of the pressing part 21 can make the rubber part 23 completely fit with the inner end face of the needle cylinder 1, so that no redundant cavity exists between the needle core 2 and the needle cylinder 1, the liquid medicine residue can be avoided, and the waste is reduced.
The needle head 3 is fixedly arranged at one end of the needle cylinder 1, the needle head 3 is of a hollow metal tube structure made of composite metal materials, and the needle head 3 penetrates into the needle cylinder 1 and is flush with the inner end face of the needle cylinder 1.
Specifically, the needle head 3 is a 29G needle head, the outer diameter of the needle head is 0.33mm, the inner diameter of the needle head is 0.15mm, the thickness of the tube wall is 0.09mm, and the length of the needle head is 13mm, so that the requirements of a vitreous cavity injection operation are met.
In order to ensure the firm connection between the needle head 3 and the needle cylinder 1, one end of the needle cylinder 1 is provided with a connecting part 7, the connecting part 7 and the needle cylinder 1 are integrally formed, the needle head 3 is fixedly arranged in the connecting part 7 in a penetrating way, one end of the needle head 3 penetrates through the connecting part 7 to be flush with the inner end surface of the needle cylinder 1, and the firm and stable connection between the needle head 3 and the needle cylinder 1 can be increased under the action of the connecting part 7;
when pushing the liquid medicine, the liquid medicine in the needle cylinder 1 can be directly pushed into the needle head 3, and the connecting structure of the needle cylinder 1 and the needle head 3 can ensure that most of liquid is basically pushed out after the needle core 2 is pushed to the bottom, so that the liquid residue is avoided.
In order to protect the exposed needle head 3, the needle cap 4 is buckled at one end of the needle cylinder 1, the needle cylinder 1 and the needle cap 4 are both made of polymer composite materials, and the needle cap 4 is sleeved outside the needle head 3 so as to protect the needle head 3.
In this embodiment, the needle cap 4 includes an integrally formed fastening section 41, a protruding section 42 and a positioning section 43, the fastening section 41 is a hollow cylindrical structure, a clamping groove matched with the connecting portion 7 is formed in the fastening section 41, the fastening section 41 is fastened to the connecting portion 7, so that the needle cap 4 can be connected to the needle cylinder 1, and the outer diameter of the fastening section 41 is the same as the outer diameter of the needle cylinder 1;
In order to facilitate the determination of the positioning puncture needle insertion site, one end of the buckling section 41 is provided with the positioning section 43, the upper side and the lower side of the positioning section 43 are symmetrically concave downwards and are flat, and the lower concave surface of the positioning section 43 is an arc-shaped surface;
the positioning section 43 is provided with three spine-shaped protrusions 6 distributed at intervals, the spine-shaped protrusions 6 can be used for determining puncture positions in intraocular lens eye and vitreous cavity injection, the spine-shaped protrusions 6 are positioned at the junction of the lower concave surfaces at two sides, and the vertical distance between two adjacent spine-shaped protrusions 6 is L1And L2，L1Is 3.00mm, L2Is 4.00mm, and meets the quality control standard of vitreous cavity injection for retinopathy in China: (V) injection operation process: the distance between the eye with crystalline lens and the corneal limbus is 3.5-4.0 mm, and the distance between the eye without crystalline lens or IOL and the eye with far vision is 3.0-3.5 mm.
In the initial state, the needle cap 4 is buckled on the connecting part 7, and the needle cap 4 is not separated from the needle cylinder 1; when the injector is used for injecting medicine into a vitreous cavity, the needle cylinder 1 is taken up to prick the three thorn-shaped bulges 6 to the sclera, and then punctate pricks are left on the sclera to form a puncture needle inserting site;
taking off the needle cap 4, according to the puncture needle-inserting site, the needle head 3 of the syringe containing the medicine injected into the vitreous body and the eyeball wall are firstly inclined and then vertically and slowly pricked into the sclera, the needle point of the needle head 3 faces to the center of the eyeball so as to avoid damaging the crystal, the pricking depth is at least 6mm, then the needle core 2 is slowly and carefully pushed, the proper dose of the treatment medicine is injected, the needle head 3 is slowly drawn out after the medicine is injected, and then the injection part is pressed by using a sterile cotton swab so as to prevent backflow.
The utility model discloses a needle cap 4 and cylinder 1 mutually support, and three thorn form on the needle cap 4 is protruding 6 can form the thorn mark on the sclera, and then forms the puncture and advance the needle point, and the needle point on the cylinder 1 can carry out the medicine injection, and the operation doctor can inject according to clear and definite needle point of advancing, and the needle point of advancing can assist the direct accuracy of doctor, convenient implementation vitreous cavity injection art, improves the precision of operation.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that equivalent changes or modifications made by the structure, features and principles of the present invention should be included in the claims of the present invention.
Claims (6)
1. A novel trace vitreous cavity medicine injector comprises a needle cylinder (1), a needle core (2), a needle head (3) and a needle cap (4), and is characterized in that scale marks (5) are arranged on the outer wall of the needle cylinder (1), the needle core (2) is arranged in the needle cylinder (1) in a sliding manner, the needle head (3) is fixedly arranged at one end of the needle cylinder (1), and the needle head (3) penetrates into the needle cylinder (1) and is flush with the inner end face of the needle cylinder (1);
the needle cap (4) is buckled at one end of the needle cylinder (1), the needle cap (4) is sleeved outside the needle head (3), the needle cap (4) comprises a buckling section (41), a protruding section (42) and a positioning section (43) which are integrally formed, the buckling section (41) and the protruding section (42) are connected and combined to form a stepped shaft shape, and the positioning section (43) is arranged at one end of the buckling section (41);
the upper side and the lower side of the positioning section (43) are symmetrically concave downwards to form a flat shape, the lower concave surface of the positioning section (43) is an arc-shaped surface, three spine-shaped protrusions (6) distributed at intervals are arranged on the positioning section (43) to be used for determining a puncture position, the spine-shaped protrusions (6) are located at the junction of the lower concave surfaces on the two sides, and the vertical distance between every two adjacent spine-shaped protrusions (6) is 3.00mm and 4.00mm respectively.
2. The novel micro-vitreous cavity drug injector according to claim 1, characterized in that the syringe (1) and the needle cap (4) are made of polymer composite material, and the needle (3) is a hollow metal tube structure made of composite metal material.
3. The novel micro-vitreous cavity drug injector according to claim 1, characterized in that the unit scale of the graduation marks (5) is ml, and the graduation marks (5) are 0.025ml per cell to facilitate calculation of the injected dose.
4. The novel micro-vitreous cavity drug injector according to claim 1, characterized in that the needle core (2) comprises a pressing part (21), a push rod part (22) and a rubber part (23), one end of the push rod part (22) is arranged outside the needle cylinder (1) and connected with the pressing part (21), the other end of the push rod part (22) is arranged inside the needle cylinder (1) and connected with the rubber part (23), and the rubber part (23) is cylindrical and clings to the inner wall of the needle cylinder (1).
5. The novel micro-vitreous cavity drug injector according to claim 1, characterized in that a connecting part (7) is arranged at one end of the syringe (1), the connecting part (7) and the syringe (1) are integrally formed, the needle (3) is fixedly arranged in the connecting part (7), and one end of the needle (3) passes through the connecting part (7) and is flush with the inner end surface of the syringe (1).
6. The novel micro-vitreous cavity drug injector according to claim 5, characterized in that the fastening section (41) is a hollow cylinder structure, the fastening section (41) is fastened on the connecting part (7), and the outer diameter of the fastening section (41) is the same as that of the syringe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023279420.8U CN214909111U (en) | 2020-12-31 | 2020-12-31 | Novel trace vitreous chamber medicine syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023279420.8U CN214909111U (en) | 2020-12-31 | 2020-12-31 | Novel trace vitreous chamber medicine syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214909111U true CN214909111U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023279420.8U Active CN214909111U (en) | 2020-12-31 | 2020-12-31 | Novel trace vitreous chamber medicine syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214909111U (en) |
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2020
- 2020-12-31 CN CN202023279420.8U patent/CN214909111U/en active Active
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