CN112168480A - Needle head for intrastromal corneal injection - Google Patents

Abstract

The invention provides a needle head for intrastromal corneal injection, which consists of a needle head section, an arc-shaped connecting section and a needle tail section which are sequentially connected, wherein the needle head section consists of a tip end and a bobbin, a plurality of openings are equidistantly formed in the bobbin from the connecting part of the tip end along the direction of the bobbin shaft of the bobbin according to a preset length, an elastic sleeve with the inner diameter being the same as the outer diameter of the bobbin is sleeved on the outer side of the bobbin, and bulges are equidistantly arranged on the inner wall of the elastic sleeve along the direction of the bobbin shaft of the bobbin according to the opening distance; the needle head enables an operator to conveniently adjust and set the puncture depth, accurately designs the depth of the medicine entering the cornea, reduces the problems of perforation of the cornea, over superficial injection of the medicine and the like, and simultaneously realizes the interlayer injection of the medicine.

Description

Needle head for intrastromal corneal injection

Technical Field

The invention relates to the field of medical instruments, in particular to a needle head for intrastromal corneal injection.

Background

Corneal diseases are one of the most important blinding eye diseases, and after patients have corneal diseases, frequency point medicines are often needed to improve local medicine concentration to relieve disease progress so as to reduce damage of the diseases to the corneal transparency to the greatest extent.

Current treatment modalities for keratitis include topical instillation, anterior chamber administration, and intrastromal injection. However, at present, no needle head special for intrastromal corneal injection is available, an operating doctor usually adopts a 1ml syringe to replace the needle head, and because the normal thickness of the cornea is only about 500 μm, the possibility of corneal perforation caused by intrastromal injection of the doctor can be caused, meanwhile, infection intraocular transmission is caused, if the puncture depth does not reach the lesion depth, the local concentration of the medicine is not enough to kill pathogens, and the treatment effect cannot be guaranteed. There is therefore a need for an injection device that can precisely adjust the depth of penetration to ensure therapeutic efficacy while minimizing corneal trauma to the patient.

Disclosure of Invention

In view of the above problems, the present invention provides a needle for intrastromal corneal injection.

The purpose of the invention is realized by adopting the following technical scheme:

the utility model provides a syringe needle for injection in corneal stroma, the syringe needle is hollow structure, comprises syringe needle section, arc linkage segment and the backshank section that connects gradually, syringe needle section comprises pointed end and bobbin, from the junction of pointed end along the bobbin tubular shaft direction of presetting length equidistance on the bobbin and seted up a plurality of openings, the bobbin outside cover is equipped with the elasticity sleeve pipe that the internal diameter is the same with the bobbin external diameter, be provided with the arch according to opening interval equidistance on the elasticity sleeve pipe inner wall along bobbin tubular shaft direction.

Preferably, the tip is 50 μm long and has a conical shape.

Preferably, the elastic sleeve is 1cm long and 0.5cm thick.

Preferably, the distance between the openings on the bobbin is 50 μm.

Preferably, the total length of the opening on the bobbin is 400 μm.

Preferably, the bending angle of the arc-shaped connecting section is 90 °.

The needle head needs to be operated under microsurgical equipment during injection. During operation, a patient lies flat, disinfects around eyes and performs surface anesthesia, then an operator adjusts the position of the elastic sleeve to ensure that the needle head can reach a preset depth, the needle head is connected with the injector, the needle head enters the injector perpendicular to the corneal surface, the needle tail section is slightly pressed by one hand after the resistance of the elastic sleeve is sensed to ensure that the needle head does not slip in the injection process, and the other hand injects the medicine to realize interlayer injection under accurate medicine positioning.

The invention has the beneficial effects that:

(1) through setting up equidistance opening and elastic sleeve, make operating personnel can conveniently adjust and set up the depth of puncture, the accurate design medicine gets into the cornea degree of depth, reduces the perforation of cornea, medicine injection and too shallow scheduling problem.

(2) The side direction opening hole site is arranged to provide a side direction administration way, so that the injection between the cornea layers of the medicine can be realized at the same time, the medicine is injected into the stroma layers, the medicine flows out from the injection cavity when the patient stands, and the local medicine concentration of the cornea is ensured to the maximum extent.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

FIG. 1 is a schematic view of the needle of the present invention;

FIG. 2 is a schematic structural view of the needle section of the present invention;

FIG. 3 is a schematic structural view of the elastic tube of the present invention;

fig. 4 is a schematic view of the needle of the present invention in use for corneal injection.

Reference numerals: 1-a needle section; 2-an arc-shaped connecting section; 3-needle tail section; 4-the cornea; 5-a syringe; 11-an elastic sleeve; 12-a tip; 13-a bobbin; 14-an opening; 15-bulge.

Detailed Description

The invention is further described with reference to the following examples.

A needle head for intrastromal corneal injection comprises aneedle head section 1, an arc-shaped connectingsection 2 and aneedle tail section 3 which are sequentially connected, wherein theneedle head section 1 comprises atip 12 and abobbin 13, a plurality ofopenings 14 are formed in thebobbin 13 at the joint of thetip 12 at equal intervals along the axial direction of the bobbin at preset lengths, anelastic sleeve 11 with the inner diameter being the same as the outer diameter of thebobbin 13 is sleeved on the outer side of thebobbin 13, andprotrusions 15 are arranged on the inner wall of theelastic sleeve 11 at equal intervals along the axial direction of the bobbin.

Preferably, the tip is 50 μm long and has a conical shape.

Preferably, the elastic sleeve is 1cm long and 0.5cm thick.

Preferably, the distance between the openings on the bobbin is 50 μm.

Preferably, the total length of the opening on the bobbin is 400 μm.

Preferably, the bending angle of the arc-shaped connecting section is 90 °.

The needle head needs to be operated under microsurgical equipment during injection. During operation, a patient lies flat, disinfects around eyes and performs surface anesthesia, then an operator adjusts the position of the elastic sleeve to ensure that the needle head can reach a preset depth, the needle head is connected with the injector, the needle head enters the injector perpendicular to the corneal surface, the needle tail section is slightly pressed by one hand after the resistance of the elastic sleeve is sensed to ensure that the needle head does not slip in the injection process, and the other hand injects the medicine to realize interlayer injection under accurate medicine positioning.

The use method of the needle head comprises the following steps:

the patient lies flat, and the medical staff carries out disinfection and surface anesthesia on the periphery of the eyes;

then, the operator adjusts the position of the sleeve on the needle head, so that the exposed length of the needle head is the depth of the needle head penetrating into the cornea;

then, the operator controls the injector with one hand and vertically pierces the needle into the cornea until the exposed needle is completely immersed into the cornea;

secondly, an operator injects the medicine to realize interlayer injection under accurate positioning of the medicine;

finally, the needle is pulled out of the cornea.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. A needle head for intrastromal corneal injection is characterized by comprising a needle head section, an arc-shaped connecting section and a needle tail section which are sequentially connected, wherein the needle head section comprises a tip end and a bobbin, a plurality of openings are formed in the bobbin at the joint of the tip end at equal intervals along the axial direction of the bobbin at preset lengths, an elastic sleeve with the inner diameter being the same as the outer diameter of the bobbin is sleeved on the outer side of the bobbin, bulges are arranged on the inner wall of the elastic sleeve at equal intervals along the axial direction of the bobbin, and the intervals between the bulges are equal to the intervals between the openings.

2. A needle for intrastromal corneal injection according to claim 1, wherein the tip is 50 μm long and is conically shaped.

3. A needle for intrastromal corneal injection as claimed in claim 1, wherein the elastomeric sleeve is 1cm long and 0.5cm thick.

4. A needle for intrastromal corneal injection according to claim 1, wherein the barrel has openings spaced 50 μm apart.

5. The needle for intrastromal corneal injection of claim 1, wherein the total length of the opening in the barrel is 400 μm.

6. A needle for intrastromal corneal injection according to claim 1, wherein the arcuate connecting segment has a bend angle of 90 °.

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