CN111529196A

CN111529196A - Injection flow adjustable double-chamber injector for eye

Info

Publication number: CN111529196A
Application number: CN202010571154.1A
Authority: CN
Inventors: 张明; 冉瑞金; 曹俊; 高云霞; 施文强; 苟月琴
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-08-14

Abstract

The invention provides an intraocular double-cavity syringe with adjustable injection flow, which comprises a syringe tube body and a needle head seat, wherein the head part of the syringe tube body is provided with a joint; the head parts of the two injection cavities are respectively provided with a liquid channel, the two liquid channels are converged at the joint in a Y shape, and the liquid channels are provided with flow regulating devices; the tail part of the syringe tube body is provided with an inflating piston which is connected with the wave cutting machine. The intraocular double-cavity injector with the adjustable injection flow, provided by the invention, has the advantages of simple and compact design structure, lower cost, easiness in disinfection, reusability, cost saving, suitability for smaller ophthalmic surgery space and convenience in use; the intraocular double-cavity injector with the adjustable injection flow can simultaneously inject two liquid medicines with different injection flows in different proportions according to the requirements of ophthalmic patients, and is worthy of application and popularization in ophthalmic surgery.

Description

Injection flow adjustable double-chamber injector for eye

Technical Field

The invention relates to the technical field of ophthalmic medical equipment, in particular to an intraocular double-cavity injector with adjustable injection flow.

Background

At present, most injectors used at home and abroad are single-chamber injectors, and can only be suitable for injection of one liquid medicine, but in ophthalmic surgery, two liquid medicines are required to be injected into eyeballs simultaneously and mixed to form one medicine, the mixed medicine plays a role in the eyeballs to treat ophthalmic diseases, and the existing single-chamber injectors cannot achieve the purpose.

In the prior art, a three-way pipe is commonly used clinically to complete a treatment mode of injecting two medicaments at the same time, but because the operation space of the ophthalmic surgery is small, the operation is inconvenient, medical personnel are inconvenient to control the injection pressure of an injector, and the application of the three-way pipe in the ophthalmic surgery is limited; some doctors also use two single syringes to inject two kinds of medicine simultaneously, but in the operation process, the pistons of the two syringes need to be pushed simultaneously, the operation is inconvenient, and the problem that the two kinds of liquid medicine cannot be injected in equal quantity due to inconsistent pushing pressure exists.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an intraocular double-cavity injector with adjustable injection flow, which solves the problem that a single-cavity injector in the prior art cannot simultaneously inject two liquid medicines into an eyeball.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:

the intraocular double-cavity injector with adjustable injection flow comprises an injector tube body and a needle head seat, wherein the head part of the injector tube body is provided with a joint, the needle head seat is provided with a needle head, the needle head seat is detachably connected with the joint, and two injection cavities which are independent mutually and have equal volume are arranged in the injector tube body; the head parts of the two injection cavities are respectively provided with a liquid channel, and the two liquid channels are converged at the joint in a Y shape;

the tail ends of the two injection cavities are respectively provided with a pushing piston with the same cross section as the injection cavities, the center of the pushing piston is provided with a passage penetrating through the pushing piston, and a switch valve capable of being opened and closed is arranged in the passage;

the tail part of the syringe tube body is provided with an inflating piston, and the inflating piston comprises a circular rubber plug matched with the diameter of the inner wall of the syringe tube body and an inflating tube connected to the circular rubber plug; the gas-filled tube is used for communicating the glass body cutting machine;

the two injection cavities contain different types of liquid medicines, the liquid medicines in the two injection cavities respectively flow out from the two liquid channels, and the flowing liquid medicines are converged at the joint position of the injector tube body in a Y shape, so that the problem that the existing injector cannot meet the injection requirement of the two liquid medicines is solved, the requirement that the two liquid medicines are injected into the eyeball simultaneously in an ophthalmic operation and mixed to form a medicine in the eyeball is met, and the mixed medicine plays a role in the eyeball;

the inflation piston inflates two injection cavities in the syringe tube simultaneously, the thrust acts on the pushing piston, the pushing pressure of the pushing piston on the two injection cavities is consistent, and the two liquid medicines in the two injection cavities are enabled to be injected in an equivalent mode.

Further, in order to prevent the inflation piston from pressurizing the interior of the syringe tube too much and too fast during the injection process of the syringe, the circular rubber plug on the inflation piston is separated from the tail end of the syringe tube; the outer wall of the tail part of the syringe tube body is provided with a clamping head; a snap ring matched with the chuck is arranged on the outer wall of the circular rubber plug; after the round rubber plug is plugged into the tail part of the syringe tube body, the chuck is connected with the snap ring in a clamping way.

Furthermore, in order to prevent the liquid medicine mixed at the joint from flowing back into the injection cavity through the liquid channel and avoid polluting the liquid medicine in the injection cavity, a one-way valve is arranged in each of the two liquid channels.

Further, the liquid medicines in the injection cavities are conveniently filled, and the liquid medicines in the two injection cavities are prevented from leaking from the tail ends of the injection cavities to cause mutual mixing of the liquid medicines; the accurate guide of the pushing piston is ensured, guide rods are arranged at the centers of the two pistons, and a channel at the center of the piston penetrates through the guide rods and the piston; the tail parts of the two injection cavities are respectively provided with a cover plate with a through hole at the central point, and the cover plates are detachably connected with the injection cavities; the guide rod is arranged in the through hole and can slide along the length direction of the through hole.

Preferably, in order to reduce the air injection of the injection cavity into the eye caused by the inclination of the injection cavity, the heads of the two injection cavities are in a circular truncated cone shape with a small front part and a large rear part, and the inner walls of the two injection cavities are provided with scale marks.

Furthermore, in order to enable the injector to inject two liquid medicines with different proportions simultaneously, flow regulating devices are arranged in the liquid channels of the two injection cavities respectively, and each flow regulating device comprises a connecting rod, a handle and a ball valve, wherein the diameter of the valve core of the ball valve is the same as that of the liquid channel; one end of the connecting rod penetrates through the syringe tube body to be connected with the ball valve core, and the other end of the connecting rod is positioned outside the syringe tube body and is fixedly connected with the handle; the rotating handle can drive the valve core of the ball valve to rotate. The flow regulating device can change the diameter of the fluid circulation of the two liquid channels, thereby controlling the injection proportion of the injector for injecting two different liquid medicines.

Furthermore, in order to avoid that the medical staff is pricked by the needle when using the syringe, the needle head seat is provided with a needle head sleeve, the length of the needle head sleeve is larger than that of the needle head, the needle head sleeve is of a thin-wall tubular structure, the tail part of the needle head sleeve is fixedly connected with the needle head seat, the head part of the needle head sleeve is an opening, and the stroke at the edge of the needle head sleeve is outwards bent into a circular arc shape; the material of the needle sleeve is transparent elastic material, when medical personnel carry out ophthalmic surgery, after the needle penetrates into the eyeball, the needle sleeve contacts the surface of the eyeball, the wall of the needle sleeve is compressed, and the head of the needle sleeve is turned outwards, so that the strong inadaptation to the eyeball of a patient can not be caused.

Furthermore, for the convenience of medical personnel to the judgement of syringe needle depth of insertion, be equipped with the lug on the syringe needle outer wall, the lug is 3.5mm with the most advanced distance of syringe needle.

Furthermore, in order to fix the eyeball during the injection process of the injector, the injector also comprises an eyeball fixer in a shape of a hemispherical shell, the eyeball fixer is provided with a small hole for the needle head and the bump to pass through, and the material of the eyeball fixer is a nontoxic transparent elastic material.

Furthermore, for the medical personnel conveniently hold the syringe, a handheld baffle is arranged at the position close to the head of the syringe tube body, and radians matched with the fingers are arranged on the handheld baffle.

The invention has the beneficial effects that: the intraocular double-cavity injector with the adjustable injection flow, provided by the invention, has the advantages of simple design structure, lower cost, easiness in disinfection, capability of being repeatedly used, cost saving, compact structure, suitability for smaller ophthalmic surgery space and convenience in use; the intraocular double-cavity injector with the adjustable injection flow can simultaneously inject two liquid medicines with different injection flows in different proportions according to the requirements of ophthalmic patients, meets the operation requirements of the ophthalmic patients, and is worthy of application and popularization in ophthalmic operations.

Drawings

Fig. 1 is a schematic diagram of an intraocular dual-chamber syringe with adjustable injection flow.

Fig. 2 is an enlarged schematic view of the check valve.

Fig. 3 is a rear view of the syringe tube.

Fig. 4 is a front structural schematic diagram of the inflating piston.

Fig. 5 is an enlarged structure diagram of the pushing piston.

Wherein, 1, the syringe tube body; 2. a joint; 3. a needle head; 4. a needle head seat; 5. an injection cavity; 6. a liquid channel; 7. an inflation piston; 71. a circular rubber plug; 72. an inflation tube; 8. clamping a head; 9. a snap ring; 10. a one-way valve; 11. a cover plate; 12. an on-off valve; 13. a flow regulating device; 131. a ball valve; 132. a connecting rod; 133. a handle; 14. a needle cannula; 15. a bump; 16. an eyeball fixator; 17. a hand-held baffle; 18. pushing the piston; 19. a guide rod.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

As shown in figures 1-5, the injection flow adjustable intraocular double-cavity syringe provided by the invention comprises a syringe tube body 1 with a joint 2 at the head and a needle seat 4 with a needle 3, wherein the needle seat 4 is detachably connected with the joint 2.

The needle head seat 4 is provided with a needle head sleeve 14, the length of the needle head sleeve 14 is greater than that of the needle head 3, the needle head sleeve 14 is of a thin-wall cylindrical structure, the tail part of the needle head sleeve 14 is fixedly connected with the needle head seat 4, the head part of the needle head sleeve 14 is an opening, and the edge of the needle head sleeve is in an outwards-bent arc shape; the material of needle cannula 14 is transparent elastic material, and when medical personnel carried out ophthalmic surgery, after syringe needle 3 pierced eyeball, needle cannula 14 contacted eyeball surface, 14 pipe walls of needle cannula compressed, and 14 heads of needle cannula turned up, can not cause strong discomfort to patient's eyeball, and needle cannula 14 avoided medical personnel to be pricked by the needle at the syringe of using.

Be equipped with lug 15 on the syringe needle outer wall, lug 15 is 3.5mm with 3 most advanced distances of syringe needle, makes things convenient for medical personnel to the judgement of syringe needle 3 depth of insertion.

The injector also comprises an eyeball fixer 16 in the shape of a hemispherical shell, the eyeball fixer 16 is provided with a small hole for the needle head and the convex block 15 to pass through, and the material of the eyeball fixer 16 is a nontoxic transparent elastic material; a handheld baffle 17 is arranged at the position close to the head of the injector tube body 1, and a radian matched with fingers is arranged on the handheld baffle 17; the eyeball is fixed during the injection process of the injector, and the medical care personnel can hold the injector conveniently.

Two injection cavities 5 which are mutually independent and have equal volume are arranged in the injector tube body 1; the head parts of the two injection cavities 5 are respectively provided with a liquid channel 6, and the two liquid channels 6 are converged at the joint 2 in a Y shape; different kinds of liquid medicines are contained in the two injection cavities 5, the liquid medicines in the two injection cavities 5 flow out from the two liquid channels 6 respectively, the flowing liquid medicines are converged in a Y shape at the position of the joint 2 of the injector tube body 1, the problem that the existing injector cannot meet the injection problem of the two liquid medicines is solved, the requirement that the two liquid medicines are required to be injected into the eyeball and mixed in the ophthalmic surgery to form a medicine is met, and the mixed medicine plays a role in the eyeball.

The tail ends of the two injection cavities 5 are respectively provided with a pushing piston 18 with the same cross section as the injection cavities 5, the center of the pushing piston 18 is provided with a channel penetrating through the pushing piston, and a switch valve 12 capable of being opened and closed is arranged in the channel; when the switch valve 12 injects the liquid medicine into the two injection cavities 5, the switch valve 12 is opened, and when the liquid medicine is injected and the piston 18 is pushed to start injecting the medicine, the switch valve 12 is closed; the switch valve 12 is arranged to facilitate the filling of the liquid medicines in the injection cavities 5 and prevent the liquid medicines in the two injection cavities 5 from leaking from the tail ends of the injection cavities 5 to cause the mutual mixing of the liquid medicines; the on-off valve 12 is closed to avoid that air enters the two injection chambers 5 during injection of the medicament by the injector, resulting in intermixing of air and liquid medicament.

The two liquid channels 6 are internally provided with a one-way valve 10, so that the liquid medicine mixed at the joint 2 is prevented from flowing back into the injection cavity 5 through the liquid channels 6, and the liquid medicine in the injection cavity 5 is prevented from being polluted.

The centers of the two pistons 18 are respectively provided with a guide rod 19, and a channel at the center of the piston penetrates through the guide rods 19 and the pistons 18; the tail parts of the two injection cavities 5 are respectively provided with a cover plate 11 with a through hole at the central point, and the cover plates 11 are detachably connected with the injection cavities 5; the guide rod 19 is arranged in the through hole, and the guide rod 19 can slide along the length direction of the through hole.

The tail part of the syringe tube body 1 is provided with an inflating piston 7, and the inflating piston 7 comprises a circular rubber plug 71 matched with the diameter of the inner wall of the syringe tube body 1 and an inflating tube 72 connected to the circular rubber plug 71; the gas-filled tube 72 is used for communicating with the vitreous cutter; the inflating piston 7 inflates the two injection cavities 5 in the syringe tube body 1 at the same time, the pushing piston 18 pushes the liquid medicines in the two injection cavities 5 at the same time under the inflation action of the inflating tube 72 on the section between the pushing piston 18 and the circular rubber plug 71, the pushing pressure on the two injection cavities 5 is consistent, and the two liquid medicines in the two injection cavities 5 are ensured to be injected in equal quantity. After the injection of the liquid medicine in the injection cavity 5 is completed, the air inflation piston 7 sucks air, so that the air pressure of the pushing piston 18 in the injection cavity 5 and the end section of the cover plate 11 is lower than the standard atmospheric pressure, and the pushing piston 18 returns to the initial position.

A flow regulating device 13 is arranged in each of the liquid channels 6 of the two injection cavities 5, and each flow regulating device 13 comprises a connecting rod 132, a handle 133 and a ball valve 131 with the diameter of a valve core being the same as that of the liquid channel 6; one end of the connecting rod 132 passes through the syringe tube 1 and is connected with the valve core of the ball valve 131, and the other end is positioned outside the syringe tube 1 and is fixedly connected with the handle 133; the rotating handle 133 can rotate the valve core of the ball valve 131. The flow regulating device 13 can change the diameter of the fluid communication of the two liquid channels 6, thereby controlling the injection ratio of the injector to inject two different liquid medicines.

The outer wall of the tail part of the syringe tube body 1 is provided with a clamping head 8; a clamping ring 9 matched with the clamping head 8 is arranged on the outer wall of the round rubber plug 71; after the round rubber plug 71 is plugged into the tail part of the syringe tube body 1, the chuck 8 is clamped and connected with the snap ring 9; the phenomenon that the inflation piston 7 pressurizes the inside of the syringe tube 1 too much and too fast to cause the round rubber plug 71 on the inflation piston 7 to be separated from the tail end of the syringe tube 1 is avoided.

The use method of the intraocular double-cavity syringe with the adjustable injection flow comprises the following steps:

firstly, plugging a joint 2 at the head of a syringe tube body 1;

secondly, according to the flow ratio of the two injected liquid medicines, the flow diameters of the two liquid channels 6 are changed by adjusting the flow adjusting device 13;

thirdly, respectively injecting two different liquid medicines into the two injection cavities 5 through the switch valve 12 at the tail part of the injection cavity 5, after the liquid medicines are fully injected, closing the switch valve 12 at the tail end of the injection cavity 5, inclining the syringe tube body 1, and dumping the redundant overflowed liquid medicines at the tail end of the injection cavity 5;

fourthly, the round rubber plug 71 on the inflating piston 7 is sealed at the tail end of the injector tube body 1, an inflating tube 72 on the inflating piston 7 is connected with a vitreous body cutting machine, and the vitreous body cutting machine supplies air for the inflating tube 72;

fifthly, opening the joint 2 at the head of the syringe tube body 1;

sixthly, screwing the joint 2 at the head of the syringe tube body 1 and the needle seat 4 with the needle head;

seventhly, fixing the eyeball of the patient by using the eyeball fixer 16;

eighthly, opening and setting the injection pressure of the vitreous body cutting machine; the pushing pressure drives the pushing piston 18 to push the piston 18 to inject the liquid medicine in the injection cavity 5;

and ninthly, the medical staff uses the injector to complete the operation of injecting different liquid medicines to the eyeball of the patient.

Claims

1. The intraocular double-chamber syringe with adjustable injection flow comprises a syringe tube body (1) with a joint (2) at the head and a needle seat (4) with a needle (3), wherein the needle seat (4) is detachably connected with the joint (2), and is characterized in that two injection chambers (5) which are independent from each other and have equal volume are arranged in the syringe tube body (1); the head parts of the two injection cavities (5) are respectively provided with a liquid channel (6), and the two liquid channels (6) are converged at a joint in a Y shape;

the tail ends of the two injection cavities (5) are respectively provided with a pushing piston (18) with the same cross section as that of the injection cavity (5), the center of each pushing piston (18) is provided with a passage penetrating through the pushing piston, and a switch valve (12) capable of being opened and closed is arranged in each passage;

the tail part of the syringe tube body (1) is provided with an inflating piston (7), and the inflating piston (7) comprises a circular rubber plug (71) matched with the diameter of the inner wall of the syringe tube body (1) and an inflating tube (72) connected to the circular rubber plug (71); the gas-filled tube (72) is used for communicating the vitreous body cutting machine.

2. The intraocular double-chamber injector with adjustable injection flow rate according to claim 1, characterized in that the outer wall of the tail part of the injector tube body (1) is provided with a chuck (8); a snap ring (9) matched with the chuck (8) is arranged on the outer wall of the round rubber plug (701); after the circular rubber plug (701) is plugged into the tail of the syringe tube body (1), the clamping head (8) is connected with the clamping ring (9) in a clamping mode.

3. The adjustable injection flow intraocular dual-chamber syringe as claimed in claim 1, characterised in that a one-way valve (10) is provided in both of said liquid channels (6).

4. The adjustable injection flow intraocular dual-chamber syringe as claimed in claim 1, characterised in that a guide rod (19) is provided centrally in both pistons (18), a passage in the centre of the piston extending through the guide rod (19) and the piston (18);

the tail parts of the two injection cavities (5) are respectively provided with a cover plate (11) with a through hole at the central point, and the cover plates (11) are detachably connected with the injection cavities (5);

the guide rod (19) is arranged in the through hole and can slide along the length direction of the through hole.

5. The intraocular double-chamber injector with adjustable injection flow according to claim 1, characterized in that the heads of the two injection chambers (5) are in the shape of a truncated cone with a small front and a big back, and the inner walls of the two injection chambers (5) are provided with scale marks.

6. The adjustable injection flow intraocular dual-chamber syringe according to claim 1, characterized in that one flow regulating device (13) is provided in the liquid passage (6) of both injection chambers (5), said flow regulating device (13) comprising a connecting rod (132), a handle (133) and a ball valve (131) having a spool diameter identical to the diameter of the liquid passage (6); one end of the connecting rod (132) penetrates through the injector tube body (1) to be connected with the valve core of the ball valve (131), and the other end of the connecting rod is positioned outside the injector tube body (1) and is fixedly connected with the handle (133); the rotating handle (133) can drive the valve core of the ball valve (131) to rotate.

7. The intraocular double-chamber injector with adjustable injection flow according to claim 1, characterized in that a needle cannula (14) is provided on the needle holder (4), the length of the needle cannula (14) is greater than the length of the needle (3), the needle cannula (14) is a thin-walled cylindrical structure, the tail of the needle cannula (14) is fixedly connected with the needle holder (4), the head of the needle cannula (14) is open and the edge is in an outwardly curved arc shape; the material of the needle cannula (14) is a transparent elastic material.

8. The adjustable injection flow intraocular dual-chamber syringe as claimed in claim 7, characterised in that the needle (4) is provided on its outer wall with a projection (15), the projection (15) being located at a distance of 3.5mm from the tip of the needle (4).

9. The adjustable injection flow intraocular dual chamber syringe of claim 8 further comprising an eyeball fixator (16) in the form of a hemispherical shell, said eyeball fixator (16) being provided with a small hole for the needle and the projection to pass through, the eyeball fixator (16) being made of a non-toxic transparent elastic material.

10. The intraocular double-chamber injector with adjustable injection flow according to claim 1, characterized in that a hand-held baffle (17) is provided near the head of the injector tube body (1), and the hand-held baffle (17) is provided with an arc matching with the finger.