CN211356212U

CN211356212U - Improved ophthalmic ball sub-fascia injection needle

Info

Publication number: CN211356212U
Application number: CN201922227374.8U
Authority: CN
Inventors: 卞茹
Original assignee: HOHHOT FIRST HOSPITAL
Current assignee: HOHHOT FIRST HOSPITAL
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-08-28
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses a modified ophthalmic spherical fascia lower injection needle, including syringe and syringe needle, install on the syringe and be arc form and curvature radius for 13 mm's syringe needle, the syringe includes empty section of thick bamboo, hole head, piston shaft and piston handle, and the one end that the piston shaft is located empty section of thick bamboo inboard is connected with the piston, and the one end that the piston shaft is located the empty section of thick bamboo outside is connected with the piston handle, and the syringe needle includes pintle, needle stalk and needle point, and the pintle is installed on the hole head, installs the needle stalk on the pintle, is provided with the needle point on the needle stalk. The utility model discloses injection needle under modified ophthalmic ball fascia, the different eyeball surface of convenient laminating is walked, and modified syringe needle end is the inclined plane, and the pointed end is bullet head shape, and comparatively blunt circle, the resistance of walking on sclera surface is little and can not puncture the eyeball, can be with the accurate and safe effect position that reaches of medicine, because incision direction and bulbar conjunctiva tension direction are unanimous, so incision itself can self-closing exempt from to sew up, can alleviate patient's misery and pressure.

Description

Improved ophthalmic ball sub-fascia injection needle

Technical Field

The utility model relates to the technical field of ophthalmic medical equipment, in particular to a modified ophthalmic bulbar tendon under-membrane injection needle.

Background

Sub-tenon injection is a common ophthalmic route of administration. The medicine mainly permeates through sclera, so that the medicine can reach effective treatment concentration at the part behind crystalline lens and iris, is mainly suitable for treating eye posterior segment diseases and optic nerve diseases, and is also used for local anesthesia administration before operation.

The current commonly used injection needle is a disposable sterile syringe (2.5ml or 1ml), the injection method is that after a needle point penetrates into the tenon's capsule, the needle is pushed backwards by 1.5cm along the curvature of sclera, or the needle is vertically inserted by 1.5cm at the junction of 1/3 in the middle of the superior orbital margin, after the needle point reaches the equatorial plane of the eyeball, blood is drawn back and liquid medicine is injected, and the literature reports that in partial cataract or glaucoma operation, a Helon needle (also called a blunt needle) is used for injecting 2% lidocaine to perform anesthesia under the tenon's capsule.

This mode of operation has the following disadvantages: because the needle point of the disposable sterile syringe is sharp and is a straight needle, when the injection position is pursued to be accurate, the disposable sterile syringe is easy to pierce the eyeball, the danger is greatly increased, the operation technical requirement on an injector is high, on the contrary, if the injection accident is worried, the safety is excessively pursued, the accuracy of the injection position is easily sacrificed, and the medicine cannot reach the corresponding position under the bulbar fascia, is injected into subconjunctival tissue, and cannot play a corresponding treatment effect.

In the literature report, the injection of 2% lidocaine by using a Helon needle under the bulbar fascia is performed in an operating room, the bulbar conjunctiva and the subconjunctival tissue are cut under an operating microscope, the sclera of an operating area is fully exposed, and the medicine is injected under the bulbar fascia by using the Helon needle under direct vision.

The standard sub-tenon injection can obviously benefit patients in terms of reducing the dosage and the side effect of the medicine, but has high injection risk, injection accidents frequently occur, and in the medical environment with such a tight relationship, many doctors place safety at first and sacrifice the accuracy of an injection site, so that the sub-tenon injection is actually the sub-tenon injection or the retrobulbar injection in clinic.

In order to deliver the drug to the site of action accurately and safely, an improved ophthalmic sub-tenon injection needle is needed for this purpose.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an injection needle under ball fascia for ophthalmology of modified can be with the accurate and safe effect position that reaches of medicine, can alleviate patient's misery and pressure, can solve the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: an improved ophthalmic subtenon injection needle comprises an injector and a needle head, wherein the injector is provided with the arc-shaped needle head with the curvature radius of 13mm, the injector comprises a hollow cylinder, a hole head, a piston shaft and a piston handle, one end of the hollow cylinder is provided with the hole head, the inner side of the hollow cylinder is provided with the piston shaft, one end of the piston shaft, which is positioned at the inner side of the hollow cylinder, is connected with the piston, the piston is in tight contact with the hollow cylinder, and one end of the piston shaft, which is positioned at the outer side of the hollow cylinder, is connected with the piston handle;

the syringe needle includes pintle, needle stalk and needle point, the pintle is installed on the hole head, install the needle stalk on the pintle, be provided with the needle point on the needle stalk.

Preferably, the tail end of the needle head is a bevel, and the tip end of the needle head is bullet-shaped and relatively blunt.

Preferably, the radius of curvature of the needle stalk is 15 mm.

Preferably, the length of the needle stalk is 15mm, the inner diameter of the needle stalk is 0.51mm, and the outer diameter of the needle stalk is 0.81 mm.

Preferably, the bevel length of the needle tip is 3 mm.

Preferably, the included angle between the needle stalk and the pintle is 120 degrees.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses injection needle under modified ophthalmic spherical fascia, the curvature radius of syringe needle slightly is greater than the curvature radius of the normal eye that average curvature radius is 12mm, in order to make things convenient for different eyeball surfaces of laminating to walk, the modified syringe needle end is the inclined plane, the inclined plane is downward during the injection, paste on the eyeball surface, the pointed end is bullet head shape, comparatively blunt circle, walk the resistance in sclera surface and little and can not puncture the eyeball, can be with accurate and safe the reaching effect position of medicine, because the needle point is comparatively blunt circle, be difficult for stabbing the bulbar conjunctiva, so need cut bulbar conjunctiva and fascial tissue with the micro-scissors when advancing the needle, the needle point can get into corresponding aspect, because incision direction is unanimous with bulbar conjunctiva tension direction, so incision itself can self-closing exempt from sewing up, can alleviate patient's misery and pressure.

Drawings

Fig. 1 is a schematic view of an improved ophthalmic sub-tenon injection needle of the present invention;

FIG. 2 is a schematic view of the syringe of the present invention;

FIG. 3 is a schematic view of the needle of the present invention;

FIG. 4 is a schematic view of the needle head of the present invention with the needle tip attached to the eyeball;

FIG. 5 is a perspective view of the needle of the present invention;

fig. 6 is a schematic view of the needle tip of the present invention.

In the figure: 1. an injector; 11. an empty cartridge; 12. a hole head; 13. a piston; 14. a piston shaft; 15. a piston handle; 2. a needle head; 21. a pintle; 22. needle peduncle; 23. a needle tip.

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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, an improved ophthalmic tenon injection needle comprises an injector 1 and a needle 2, wherein the injector 1 is provided with the needle 2 which is arc-shaped and has a curvature radius of 13mm, the curvature radius of the needle 2 is slightly larger than the curvature radius of a normal eye with an average curvature radius of 12mm so as to be convenient for being attached to different eyeball surfaces to pass through, the traditional needle 2 is a straight needle 2, the radian of an eyeball needs to be manually searched, the technical experience is high, the eyeball is easy to pierce in the direction adjustment process, the end of the improved needle 2 is an inclined plane, the inclined plane is downward when injecting and is attached to the eyeball surface, the tip of the improved needle is bullet-shaped and blunt, the passing resistance on the sclera surface is small and can not pierce the eyeball, the end of the needle 2 is an inclined plane, the tip of the needle is bullet-shaped and is blunt, the end of the needle 2 is an inclined plane, the inclined plane is downward when injecting and is attached, the tip is bullet-shaped and blunt, the resistance to the penetration on the surface of the sclera is small, the eyeball cannot be punctured, the needle point 23 is blunt and not easy to pierce the bulbar conjunctiva, therefore, the bulbar conjunctiva and the fascial tissue need to be cut off by microshearing when inserting the needle, the needle point 23 can enter the corresponding layer, the operation method is that after the anesthesia of the surface of the eye is operated, the point of the right eye 1, the point of the left eye 11, the bulbar conjunctiva and the subconjunctival tissue are cut off radially in the direction vertical to the tangent line of the corneal limbus between the 3mm behind the corneal limbus and the fornix part, the incision itself can be self-closed and free from suture because the incision direction is consistent with the tension direction of the bulbar conjunctiva, the injector 1 comprises a hollow cylinder 11, an orifice 12, a piston 13, a piston shaft 14 and a piston handle 15, one end of the hollow cylinder 11 is provided with the orifice 12, the piston 13 is closely contacted with the hollow cylinder 11, and one end of the piston shaft 14, which is positioned outside the hollow cylinder 11, is connected with a piston handle 15.

Referring to fig. 3-6, the needle 2 comprises a needle plug 21, a needle stem 22 and a needle tip 23, the needle plug 21 is installed on the hole head 12, the needle stem 22 is installed on the needle plug 21, the curvature radius of the needle stem 22 is 15mm, the length of the needle stem 22 is 15mm, the inner diameter of the needle stem 22 is 0.51mm, the outer diameter is 0.81mm, the needle stem 22 is provided with the needle tip 23, the included angle between the needle stem 22 and the needle plug 21 is 120 °, the syringe 1 is held by a doctor during injection without scratching the cornea, the length of the inclined plane of the needle tip 23 is 3mm, the doctor is positioned at the top of the head of the patient during injection, the eyeball of the patient is fixed slightly downwards by holding the micro-forceps by the left hand, the syringe 1 is held by the right hand, the needle enters the tissue under the tenon's capsule from a previously cut micro-conjunctiva incision, slides to the equator along the ball wall in the direction of the equator of the eyeball, the medicine is injected, a potential gap exists among the bulbar conjunctiva, the bulbar fascia and the sclera, but the conjunctiva fornix tissue is too thick, so that the operation difficulty is increased, so that the bulbar conjunctiva incision position is selected between 3mm behind the limbus and the fornix, and the incision position can be selected in the area according to the actual condition of a patient.

To sum up, the utility model discloses the ophthalmic bulbophyllum of modified is injection needle under membrane, the radius of curvature of syringe needle 2 slightly is greater than the radius of curvature that average radius of curvature is 12 mm's normal eye, in order to make things convenient for different eyeball surfaces of laminating to walk, 2 ends of modified syringe needle are the inclined plane, the inclined plane is downward during the injection, paste in the eyeball surface, the pointed end is bullet head-shaped, comparatively blunt circle, walk the resistance on sclera surface little and can not puncture the eyeball, can be with accurate and safe delivery effect position of medicine, because needle point 23 is comparatively blunt circle, be difficult for stabbing the bulbar conjunctiva, so need open bulbar conjunctiva and manadesma tissue with the micro-scissors during the needle feeding, needle point 23 can get into corresponding aspect, because incision direction is unanimous with bulbar conjunctiva tension direction, so incision itself can self-closing suture, can alleviate patient's misery and.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An improved ophthalmic sub-tenon injection needle, comprising a syringe (1) and a needle (2), characterized in that: the syringe (1) is provided with an arc-shaped needle head (2) with the curvature radius of 13mm, the syringe (1) comprises a hollow cylinder (11), a hole head (12), a piston (13), a piston shaft (14) and a piston handle (15), the hole head (12) is arranged at one end of the hollow cylinder (11), the piston shaft (14) is arranged on the inner side of the hollow cylinder (11), the piston (13) is connected to one end, located on the inner side of the hollow cylinder (11), of the piston shaft (14), the piston (13) is in close contact with the hollow cylinder (11), and the piston handle (15) is connected to one end, located on the outer side of the hollow cylinder (11), of the piston shaft (14);

the needle head (2) comprises a pintle (21), a needle stem (22) and a needle point (23), the pintle (21) is installed on the hole head (12), the needle stem (22) is installed on the pintle (21), and the needle point (23) is arranged on the needle stem (22).

2. An improved sub-tenon ophthalmic needle according to claim 1, wherein: the tail end of the needle head (2) is an inclined plane, and the tip end of the needle head is bullet-shaped and relatively blunt.

3. An improved sub-tenon ophthalmic needle according to claim 1, wherein: the curvature radius of the needle stalk (22) is 15 mm.

4. An improved sub-tenon ophthalmic needle according to claim 1, wherein: the length of the needle stem (22) is 15mm, the inner diameter of the needle stem (22) is 0.51mm, and the outer diameter of the needle stem is 0.81 mm.

5. An improved sub-tenon ophthalmic needle according to claim 1, wherein: the length of the inclined plane of the needle point (23) is 3 mm.

6. An improved sub-tenon ophthalmic needle according to claim 1, wherein: the included angle between the needle stem (22) and the needle bolt (21) is 120 degrees.