CN218922966U

CN218922966U - Injection system for subretinal drug injection

Info

Publication number: CN218922966U
Application number: CN202222486120.XU
Authority: CN
Inventors: 汪枫桦
Original assignee: Shanghai Langsheng Biotechnology Co ltd
Current assignee: Shanghai Langsheng Biotechnology Co ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-04-28
Anticipated expiration: 2032-09-20

Abstract

The present utility model relates to an injection system for subretinal drug injection comprising an injection device comprising an injection needle and a barrel for containing a drug, said barrel being provided with graduation marks, said injection system further comprising auxiliary illumination means integrated on said injection device such as to allow local illumination of the graduation marks on said barrel. By adopting the injection system provided by the utility model, the problem of complicated reading of the injection dosage value during the injection operation in the darkroom in the prior art is solved, the convenience of reading the injection dosage during the subretinal drug injection is improved, and the safety of the injection operation is improved.

Description

Injection system for subretinal drug injection

Technical Field

The present utility model relates to the field of medical devices, in particular to an injection system for drug injection, in particular for subretinal drug injection.

Background

The eyeball of a human is composed of two parts, wherein one part is an eyeball wall, the other part is an eye content, the eyeball wall is divided into an outer layer membrane, an intermediate membrane and an inner layer membrane, the outer layer membrane comprises a cornea and a sclera, the cornea occupies the front 1/6 of the outer layer, the sclera occupies the rear 5/6 of the outer layer, the intermediate membrane is a grape membrane and consists of an iris, a ciliary body and a choroid, and the inner layer membrane is a retina; the eyeball contents generally consist of crystals and vitreous bodies.

Subretinal drug injection is a treatment technology for injecting drugs into subretinal for various reasons, and is gradually applied to treatment of various genetic diseases and ocular fundus degenerative diseases at home and abroad in recent years. At present, domestic and foreign ophthalmologists need to enter a path from a vitreous body when carrying out subretinal drug injection. After the patient lies down and is disinfected and towel-laid for anesthesia, the ophthalmologist follows the vitrectomy procedure and uses a special human subretinal injector to inject the target drug under the retina after vitrectomy.

The operation involved in subretinal drug injection is done in the darkroom, and the clinically used injection device for subretinal drug injection is a micro-instrument with fine and precise graduations, in which it is often difficult to see the speed and dosage of drug bolus, and it is often necessary to switch the illumination system in the operating room so as to see the graduation marks on the syringe by turning off the light to perform the injection, and this step is repeated multiple times. In addition, the subretinal injection procedure involves the penetration of the needle into the retina, and repeated on-off operations after the needle touches the retina can interfere to some extent with the operator's injection operation, potentially risking damage to the retina and even the choroid.

Disclosure of Invention

The present utility model has been made in view of such a background, and an object thereof is to propose a novel injection system for subretinal drug injection, which enables one or more of the above-mentioned problems and/or other drawbacks of the prior art to be overcome.

The present utility model proposes an injection system for subretinal drug injection comprising an injection device comprising an injection needle and a barrel for containing a drug, said barrel being provided with graduation marks, said injection system further comprising auxiliary illumination means integrated on said injection device so as to allow local illumination of the graduation marks on said barrel.

Advantageously, the auxiliary lighting device comprises an LED lighting module.

Advantageously, the needle cylinder is provided with a graduated scale protruding outwards in the radial direction of the needle cylinder from the outer surface of the needle cylinder; the scale markings include a first scale marking disposed on an outer surface of the syringe and a second scale marking disposed on the scale, wherein the second scale marking corresponds to the first scale marking and is aligned with each other.

Advantageously, the injection device further comprises a syringe fixedly held to the barrel, the LED lighting module being fixed on the syringe.

Advantageously, the LED lighting module is fixed on the surface of the injector and arranged adjacent to the needle cylinder such that at least a portion of the light emitted by the LED lighting module propagates along or towards the scale.

Advantageously, the scale extends in the axial direction of the needle cylinder.

Advantageously, the injector is fixedly connected at a first end to the needle cylinder and is provided at a second end with an inlet port, wherein the inlet port is capable of fluid communication with the chamber of the needle cylinder.

Advantageously, the inlet port is for connection to a gas source of a glass cutter. The gas source is controlled to be turned on or off by an operator through a foot pedal of the glass cutter.

Advantageously, at a free end of the needle cylinder remote from the injection needle, two or more retaining lugs are provided projecting outwards from the outer surface of the needle cylinder, the first end of the injector being provided with two or more retaining portions for snap-engagement with the retaining lugs, respectively.

Advantageously, the LED lighting module is glued to the injector by means of a hook-and-loop fastener assembly.

With the injection system according to the utility model at least one of the following technical effects is achieved: solves the problem that the injection scale cannot be seen clearly in the injection operation in the darkroom in the prior art, reduces the operation of turning on the lamp and turning off the lamp, improves the convenience of the injection dosage reading during the subretinal drug injection, and improves the safety of the injection operation.

Drawings

The above and other features and advantages of the present utility model will become more readily appreciated from the following description with reference to the accompanying drawings, in which:

FIG. 1 shows a schematic perspective view of an injection system for subretinal drug injection according to embodiments of the present utility model;

FIG. 2 shows a schematic front view of an injection system for subretinal drug injection according to embodiments of the present utility model; and

fig. 3 shows a schematic top view of an injection system for subretinal drug injection according to embodiments of the present utility model.

All the figures are schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the utility model, the other parts being omitted or merely mentioned. That is, the present utility model may include other components in addition to those shown in the drawings.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model to those skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. The various aspects, features, embodiments and advantages below are for illustration only and should not be considered as elements or limitations of the claims unless explicitly set forth in the claims.

Terms such as "first," "second," and the like are used hereinafter to describe elements of the present application, and are merely used for distinguishing between the elements and not for limiting the nature, sequence, order, or number of such elements. In addition, it should be noted that in the present specification, the same and/or functionally identical technical features are provided with the same or similar reference signs.

As known to those skilled in the art, when performing subretinal drug injection surgery, the following procedure is typically performed: -disinfecting the drape to anesthetize the patient; -the ophthalmic doctor cutting the vitreous following a vitreous cutting procedure; pushing the drug from the vitreous access under the retina using a syringe and recording the corresponding dose scales before and after drug pushing to obtain the pushed dose. However, as mentioned in the background section, the subretinal drug injection procedure described above is accomplished in the darkroom in order to ensure that no damage is done to the retina, or even the choroid, of the human eye during surgery. However, since it is difficult to see the speed and dosage of a bolus of medication in a darkroom, it is often necessary to switch the illumination system in the operating room to allow the operator to accurately understand the speed and dosage of the bolus.

In order to solve the drawbacks and deficiencies of the prior art (e.g., avoiding repeated on-off operation, reducing the risk of damaging the retina or even the choroid), the present utility model proposes a novel injection system for subretinal drug injection, see fig. 1. The injection system 1 comprises an injection device 2, the injection device 2 comprising an injection needle 3 and a barrel 4 for containing a medicament, the barrel 4 being provided with graduation marks. In order to enable the provision of localized illumination for the graduation marks on said needle cylinder 4, the injection system 1 further comprises auxiliary illumination means integrated with the injection device 2. According to a preferred embodiment, the auxiliary lighting device may comprise an LED lighting module 5.

In addition to the injection needle 3 and the needle cylinder 4, the injection device 2 comprises a syringe 6 fixedly held to said needle cylinder 4, which syringe 6 is connected at one end to said needle cylinder 4 and at the other end provided or connected with an inlet port 7 (see fig. 2-3), said inlet port 7 being capable of being in fluid communication with the chamber of said needle cylinder 4, such that a pushing force of the gas entering into the inlet port 7 is used to achieve a bolus of the medicament in the needle cylinder 4, thereby completing the subretinal medicament injection.

According to an embodiment of the utility model, the air inlet port 7 may be connected to a source of air for a glass cutter (not shown in the figures) which is controlled to be opened or closed by the ophthalmologist via the foot pedal of said glass cutter. Therefore, after the ophthalmologist performs the previous vitrectomy, the medicine in the injector can be pushed under the retina by directly utilizing the gas thrust of the vitrectomy machine, so that the introduction of other power sources is avoided. When the ophthalmologist performs the medicine injection, both hands are used for holding the needle cylinder of the injection device and focusing on the injection site, and since the ophthalmologist can directly control the gas source of the vitrectomy machine by using the foot pedal without additionally taking out hands to perform additional operation steps, the safety of the operation process is well ensured.

In order to avoid potential retinal damage that may result from frequent switching of the illumination system in the operating room, an auxiliary illumination device according to the utility model, in particular an LED illumination module 5, may be fixed on the upper surface 6a of the injector 6, for example by means of a hook-and-loop fastener assembly (or "velcro"), glued on the upper surface of the injector and arranged adjacent to the needle cylinder 4, so that this LED illumination module 5 provides illumination to the needle cylinder 4. Referring to fig. 2, a scale 8 may be provided which extends in the axial direction of the cylinder 4 and which protrudes outwardly from the outer surface of the cylinder 4 in the radial direction of the cylinder 4. At least a portion of the light emitted by the LED lighting module 5 propagates towards or along the scale 8 so as to be able to illuminate scale markings on the scale 8 at least partially.

During the operation, since the ophthalmic doctor holds the syringe 4 of the injection device, the first scale mark 9a provided on the outer surface of the syringe 4 may be blocked, so that it is difficult for the doctor assistant to read the scale on the outer surface of the syringe. In this case, it is advantageous to provide the second scale markings 9b on the scale 8, in particular the second scale markings 9b which can be clearly illuminated by the LED lighting module 5. The second scale markings 9b may be provided to correspond to the first scale markings 9a and to be aligned with each other, allowing the physician's assistant to read more clearly.

Furthermore, in order to stably hold the injector 6 on the needle cylinder 4, two diametrically opposed holding lugs 10 (see in particular fig. 3) projecting outwards from the outer surface of the needle cylinder 4 may be provided at the free end of the needle cylinder 4 remote from the injection needle 3. Of course, more than two retaining lugs may be provided. Accordingly, one end of the injector 6 may be provided with two or more holding portions 11 for snap-engagement with the holding lugs 10, respectively. In this way, the holding lugs 10 and the holding portions 11 are engaged with each other to stably hold the two members together, and any loosening of the members due to the thrust force during gas transportation is avoided.

When the subretinal drug injection is performed, after the disinfection and eyelid opening and vitreous cutting are completed according to the specifications, the ophthalmologist holds the syringe by hand before the injection starts, and the assistant turns on the auxiliary lighting device to locally illuminate the second scale mark 9b on the scale 8 protruding from the syringe 4, so that the assistant can observe the injection dose conveniently. When an ophthalmologist performs a subretinal drug injection operation in the darkroom, the ophthalmologist only has to foot the foot pedal of the vitrectomy machine to complete the subretinal drug injection with the aid of the vitrectomy machine (e.g., with the aid of a gas thrust). The whole process omits frequent lamp turning-on-off operation, ensures clear reading of the injection dosage value on the premise of avoiding the risk of damaging retina, and improves the safety of injection operation.

It should be noted that the above-described embodiments should be regarded as illustrative only, and the present utility model is not limited to these embodiments. Many changes and modifications may be made by one skilled in the art without departing from the scope or spirit of the utility model, by considering the contents of this specification. The true scope of the utility model is defined by the following claims and their equivalents.

Claims

1. An injection system (1) for subretinal drug injection, comprising an injection device (2) comprising an injection needle (3) and a syringe (4) for containing a drug, on which syringe graduation marks are provided, characterized in that the injection system (1) further comprises auxiliary illumination means integrated on the injection device (2) such as to allow local illumination for the graduation marks on the syringe (4).

2. Injection system (1) according to claim 1, characterized in that the auxiliary lighting means comprise an LED lighting module (5).

3. An injection system (1) according to claim 2, characterized in that the needle cylinder (4) is provided with a scale (8) projecting outwards in the radial direction of the needle cylinder from the outer surface of the needle cylinder; the scale marks comprise a first scale mark (9 a) arranged on the outer surface of the needle cylinder (4) and a second scale mark (9 b) arranged on the scale (8), wherein the second scale mark corresponds to the first scale mark and is aligned with each other.

4. An injection system (1) according to claim 3, characterized in that the injection device (2) further comprises a syringe (6) fixedly held to the needle cylinder (4), the LED lighting module (5) being fixed on the syringe (6).

5. Injection system (1) according to claim 4, characterized in that the LED lighting module (5) is fixed on the surface of the injector (6) and arranged adjacent to the needle cylinder (4) such that at least a portion of the light emitted by the LED lighting module (5) propagates along or towards the scale (8).

6. Injection system (1) according to claim 5, characterized in that the scale (8) extends in the axial direction of the needle cylinder (4).

7. Injection system (1) according to any one of claims 4 to 6, characterized in that the injector (6) is fixedly connected at a first end to the needle cylinder (4) and is provided at a second end with an inlet port (7), wherein the inlet port (7) is capable of being in fluid communication with a chamber of the needle cylinder.

8. Injection system (1) according to claim 7, characterized in that the inlet port (7) is for connection to a gas source of a glass cutter.

9. Injection system (1) according to any one of claims 4 to 6, characterized in that at the free end of the needle cylinder remote from the injection needle (3) there are provided two or more retaining lugs (10) protruding outwards from the outer surface of the needle cylinder, the first end of the injector (6) being provided with two or more retaining parts (11) for snap-engagement with the retaining lugs (10) respectively.

10. Injection system (1) according to any of claims 4 to 6, characterized in that the LED lighting module (5) is glued onto the injector (6) by means of a hook-and-loop fastener assembly.