CN114948419A

CN114948419A - Injector for vitreous body of eye

Info

Publication number: CN114948419A
Application number: CN202210767527.1A
Authority: CN
Inventors: 党文君
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-08-30

Abstract

The invention discloses an eye vitreous injector, which comprises an injector body and a positioning assembly, wherein the positioning assembly comprises a connecting piece connected with the injector body and a positioning piece movably connected with the connecting piece, and the positioning piece is provided with two working positions: under the first working position, the positioning side of the positioning piece is attached to the corneal limbus of the eye of a patient, the distance between the positioning side of the positioning piece and the needle point of the injector body is 3.5mm-4mm, and the needle point is attached to the vitreous body of the eye; and under the second working position, the positioning piece is separated from the eyeball of the patient, and the needle point starts to inject after the needle is inserted. The eye vitreous body injector has reasonable structure, ensures the accuracy of the needle inserting position and improves the convenience of the operation of an operator.

Description

Injector for vitreous body of eye

Technical Field

The invention relates to the field of medical instruments, in particular to an eye vitreous injector.

Background

Intravitreal injection is injection into a predetermined tissue to achieve immediate therapeutic effect; intravitreal injection is generally used for the conditions requiring intravitreal injection such as administration (or insufflation) in vitrectomy, infectious endophthalmitis, intraocular neovascularization diseases and the like, and has the effects of reducing inflammation, macular edema, inhibiting neovascularization and the like.

When the injection site is inaccurate during injection in the vitreous cavity, the injection site is too close to the corneal limbus, which causes the needle to penetrate into the lens to cause traumatic cataract, and when the injection site is too far away from the corneal limbus, the vortex vein may be accidentally injured to cause other complications such as intraocular hemorrhage.

A positioning device for vitreous cavity injection in the prior art, as described in CN211095213U, includes an eyeball fixing body for fixing an eyeball, at least one injection positioning ruler is disposed on the eyeball fixing body, an injection positioning part is disposed on the injection positioning ruler, and when the eyeball fixing body is pressed on the corneal limbus, the distance between the injection positioning part and the corneal limbus is 3.5mm to 4 mm; injection location portion is including the hemostasis by compression sealing body that allows the syringe needle to wear to put, can carry out required vitreous body chamber injection after the syringe needle passes the hemostasis by compression sealing body, and when the syringe needle was separated with the hemostasis by compression sealing body after the injection, the utilization hemostasis by compression sealing body can seal the injection position and can carry out hemostasis by compression to the injection position.

The vitreous cavity medicine injection method is that medical staff firstly uses a positioning device to measure the needle placement position (3.5-4 mm behind the corneal limbus), then the needle is inserted and injected with the medicine which is pumped in advance (the other hand replaces the instrument and takes the cotton swab), the needle head is quickly pulled out after the injection, and the cotton swab is used for pressing the needle eye position to stop bleeding and sterilize.

The above operation steps are complicated, the operator needs to replace the instrument in the operation process, the operation is inconvenient, and the positioning device and the injector are two relatively independent instruments, so that the possibility of mutual dislocation is increased during the operation of two hands, and the needle inserting position is deviated.

Accordingly, there is a need for an improved vitreous eye injector of the prior art.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide an eye vitreous injector, which not only ensures the accuracy of the needle inserting position, but also improves the convenience of the operation of an operator.

In order to realize the technical effects, the technical scheme of the invention is as follows: an eye vitreous syringe, includes syringe body and locating component, the locating component include with the connecting piece that the syringe body is connected, with connecting piece swing joint's setting element, the setting element has two operating position: under the first working position, the positioning side of the positioning piece is attached to the corneal limbus of the eye of a patient, the distance between the positioning side of the positioning piece and the needle point of the injector body is 3.5mm-4mm, and the needle point is attached to the vitreous body of the eye; and under the second working position, the positioning piece is separated from the eyeball of the patient, and the needle point starts to inject after the needle is inserted. Through the design, the positioning piece is connected with the injector body, so that the positioning and injection operation can be realized by one hand of an operator, the accuracy of the needle inserting position is ensured, and the operation convenience of the operator is improved.

The preferred technical scheme is that the positioning piece is connected with the connecting piece in a sliding manner, and the sliding direction of the positioning piece is parallel to the axial lead direction of the injector body; the locating piece comprises a sliding block, and the connecting piece is provided with a sliding groove in sliding fit with the sliding block. Through the design, the position switching of the positioning piece is realized; as an equivalent replacement, the positioning piece can also be rotationally connected with the connecting piece, and when the positioning piece rotates to the lowest position, the positioning piece is just attached to the eyeball of the patient.

The preferred technical scheme is that the connecting piece is fixedly provided with a limiting convex ring for avoiding the separation of the sliding block and the connecting piece, and the sliding block is arranged in the limiting convex ring in a penetrating way. Through the design, the sliding block is limited to a certain extent, and the sliding block is prevented from moving radially (radially in the inner cavity of the injector).

The preferred technical scheme is that the sliding block is convexly provided with a convex wall, an elastic piece is clamped between the limiting convex ring and the convex wall, and the telescopic direction of the elastic piece is parallel to the axial lead direction of the injector body. Through the design, when the positioning piece is positioned at the first working position, the fingers for pushing the sliding block can be loosened, the sliding block is retracted under the action of the elastic piece, and the positioning piece is prevented from interfering with the needle insertion of the syringe body; the slip of slider has that certain damping or elastic component's elasticity is less, and the withdrawal dynamics of slider is less to realize the slow withdrawal of slider, avoid the slider to withdraw fast and produce vibration or striking to the syringe body, influence art person's operation.

The preferred technical scheme does, the slider is fixed to be provided with the promotion arch of being convenient for the art person to promote the setting element, promote bellied surface and be provided with anti-skidding sunken. By means of the design, the convenience of operation of an operator is improved.

The preferred technical scheme is that the positioning piece further comprises a positioning plug-in piece which is attached to the corneal limbus of the eye of the patient, and the positioning plug-in piece is connected with the sliding block in an inserting mode. Through such design, the removable setting of location plug-in components can select corresponding location plug-in components according to different patients 'eyeball size, makes the location end of location plug-in components more laminate with patient's eyeball, and the location is more accurate.

The preferable technical scheme is that the sliding block is provided with an inserting groove for inserting the positioning plug-in, and the side wall of the inserting groove and the side wall of the positioning plug-in are provided with a limiting groove and an elastic bulge which are matched with each other in a limiting way. Such a design is a further limitation of the above-described scheme.

The preferred technical scheme is that the positioning end of the positioning plug-in is arranged in a crescent shape. Through such design, the location end of crescent is favorable to laminating mutually with eye corneal limbus, improves the accuracy of location.

The preferable technical proposal is that the connecting piece is detachably and fixedly connected with the injector body. Through such design, application scope is wider, can only produce the connecting piece and link to each other with current syringe body.

The preferred technical scheme is that the connecting piece is fixedly provided with an inserting block which is matched with the clamping handle of the injector body in an inserting way and a buckle which is matched with the sleeve of the injector body in a clamping way. Through the design, the plug-in block can avoid the axial movement of the connecting piece along the injector body, and the buckle can avoid the radial movement of the connecting piece along the injector body, thereby realizing the purpose of detachable fixed connection of the connecting piece and the injector body.

The invention has the advantages and beneficial effects that: the vitreous eye injector has reasonable structure, and the positioning piece can be switched between positioning and separation from the eye by connecting the positioning piece and the injector body into a whole, so that the accuracy of the needle inserting position is improved, the positioning and injection operation can be realized by one hand of an operator, and the operation convenience of the operator is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of an ophthalmic vitreous injector embodiment 1 of the present invention;

FIG. 2 is an exploded view of FIG. 1 of an ophthalmic vitreous injector according to embodiment 1 of the present invention;

FIG. 3 is an enlarged schematic view of embodiment 1 of the vitreous eye injector of the present invention at A in FIG. 2;

FIG. 4 is an exploded view of the positioning assembly of embodiment 1 of the vitreous eye syringe of the present invention;

FIG. 5 is a schematic view of the vitreous eye syringe embodiment 1 of the present invention in a first operating position;

FIG. 6 is a schematic structural view of a second operating position of embodiment 1 of the vitreous eye syringe of the present invention;

FIG. 7 is a schematic view of the positioning insert of the vitreous eye injector of example 2 of the present invention in a state separated from the slider (crescent without flaring);

FIG. 8 is a schematic view of the positioning insert of the vitreous eye syringe of example 2 of the present invention in a state separated from the slider (crescent moon shape with flaring);

FIG. 9 is a schematic view of the positioning insert of the vitreous eye injector of embodiment 2 of the present invention shown separated from the slider (crescent with flaring-out, alternative view);

in the figure: 1. an injector body; 11. a needle tip; 12. a clamping handle; 13. a sleeve; 2. a positioning assembly; 3. a connecting member; 31. a chute; 32. a limit convex ring; 33. an insertion block; 34. buckling; 35. an adhesive layer; 36. a slide hole; 4. a positioning member; 41. positioning the side; 5. a slider; 51. a convex wall; 52. pushing the protrusion; 53. anti-skid dent; 54. inserting grooves; 55. a limiting groove; 56. a guide bar; 57. a limiting bulge; 6. an elastic member; 7. positioning the plug-in; 71. an elastic bulge; 8. a crescent shape; 91. a friction layer; 92. a friction layer is fitted.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1-6, the vitreous eye syringe of embodiment 1 includes a syringe body 1 and a positioning assembly 2, where the positioning assembly 2 includes a connecting member 3 connected to the syringe body 1 and a positioning member 4 movably connected to the connecting member 3, and the positioning member 4 has two working positions: under the first working position, the positioning side 41 of the positioning piece 4 is attached to the corneal limbus of the eye of the patient, the distance between the positioning side 41 of the positioning piece 4 and the needle point 11 of the injector body 1 is 3.5mm-4mm, and the needle point 11 is attached to the vitreous body of the eye; under the second working position, the positioning piece 4 is separated from the eyeball of the patient, and the needle point 11 starts to inject after the needle is inserted.

The positioning piece 4 is connected with the connecting piece 3 in a sliding manner, and the sliding direction of the positioning piece 4 is parallel to the axial lead direction of the injector body 1; the positioning part 4 comprises a sliding block 5, and the connecting part 3 is provided with a sliding groove 31 in sliding fit with the sliding block 5.

The connecting piece 3 is fixedly provided with a limit convex ring 32 for avoiding the separation of the sliding block 5 and the connecting piece, and the sliding block 5 is arranged in the limit convex ring 32 in a penetrating way.

The sliding block 5 is convexly provided with a convex wall 51, an elastic element 6 is clamped between the limiting convex ring 32 and the convex wall 51, and the telescopic direction of the elastic element 6 is parallel to the axial lead direction of the injector body 1.

The elastic member 6 is a compression spring.

In order to avoid lateral bending (abnormal compression) during compression of the pressure spring, resilience cannot be guaranteed, the protruding wall 51 is fixedly provided with a guide rod 56, the axial direction of the guide rod 56 is parallel to the axial lead direction of the injector body 1, the pressure spring sleeve is arranged outside the guide rod 56, the guide rod 56 is arranged in the limiting convex ring 32 in a penetrating manner and is connected with the limiting convex ring 32 in a sliding manner, the limiting convex ring 32 is provided with a sliding hole 36 matched with the guide rod 56 in a sliding manner, and the end part of the guide rod 56 is provided with a limiting protrusion 57 used for avoiding the guide rod 56 and the sliding hole 36 from being separated from each other.

The sliding block 5 is fixedly provided with a pushing bulge 52 for facilitating an operator to push the positioning part 4, and the surface of the pushing bulge 52 is provided with an anti-skid recess 53.

The connecting piece 3 is detachably and fixedly connected with the injector body 1.

The connecting piece 3 is fixedly provided with an inserting block 33 which is inserted and matched with the clamping handle 12 of the injector body 1 and a buckle 34 which is clamped and matched with the sleeve 13 of the injector body 1.

The adjacent surface of the connecting piece 3 and the injector body 1 is fixedly provided with an adhesive layer 35 which is used for bonding and connecting the connecting piece 3 and the injector body 1.

The use of example 1 was: the medical staff connects the connecting piece 3 with the injector body 1, the inserting block 33 is sleeved outside the clamping handle 12, and the buckle 34 is clamped with the sleeve 13, so that the aim of fixing the connecting piece 3 with the injector body 1 is fulfilled;

the operator adopts a palm-held mode (the palm-held mode is as shown in http:// www.honghuixiang.com.cn/guifand _ detail _ zh/id/4.html website: holding the injector by thumb, middle finger and ring finger, extending the index finger forwards to press the needle head, and the hypothenar to press the piston), the thumb pushes the pushing bulge 52 downwards to make the positioning piece 4 slide downwards until the positioning end of the positioning piece 4 is flush with the needle point 11, the positioning piece 4 is contacted with the eyeball of the patient, the positioning side 41 is contacted with the corneal limbus of the eye, and the position of the needle point 11 is the needle-inserting position;

the operator releases the thumb, holds the sleeve 13 after the thumb is separated from the pushing bulge 52, slowly retracts the positioning piece 4 under the action of the elastic piece 6 (the sliding block 5 and the sliding groove 31 slide in a damping manner, and the sliding block 5 and the sliding groove 31 are respectively provided with a friction layer (91) and a matched friction layer (92) to ensure that the positioning piece 4 slowly retracts when retracting, so that the positioning piece 4 is prevented from rapidly retracting under the action of the elastic piece 6, the limiting bulge 57 collides with the limiting convex ring 32 to cause shaking), slowly exposes the needle point 11, and then the finger exerts force to pierce the needle point 11 into the glass body, and then the palm exerts force to push the piston rod of the syringe body 1 to inject medicine into the glass body;

after the injection is finished, the needle head is pulled out, and the other hand of the operator can immediately use the cotton swab to disinfect and stop bleeding of the needle hole part, so that the operation of replacing instruments in the operation process of the operator is reduced.

Example 2

As shown in fig. 7-9, example 2 is based on example 1, with the difference that: the positioning piece 4 further comprises a positioning plug-in 7 attached to the corneal limbus of the eye of the patient, and the positioning plug-in 7 is connected with the sliding block 5 in an inserting mode.

The sliding block 5 is provided with an insertion groove 54 for the positioning plug-in 7 to insert, and the side wall of the insertion groove 54 and the side wall of the positioning plug-in 7 are provided with a limit groove 55 and an elastic bulge 71 which are matched with each other in a limit way.

The positioning end of the positioning plug-in 7 is arranged in a crescent shape 8 (the crescent can be extended outwards as shown in figure 8 and figure 9; the crescent can be extended outwards as shown in figure 7).

In order to avoid the discomfort of the patient caused by the excessive stimulation when the positioning insert 7 is in contact with the eyeball of the patient, the positioning end of the positioning insert 7 is provided with a hydrophilic coating, and the specific condition of the hydrophilic coating can refer to the descriptions disclosed in CN106075604A, CN109045367A and the like.

The differences between example 2 and example 1 are: according to the size of the eyeball of the patient, the corresponding crescent 8 positioning plug-in 7 is selected, the positioning plug-in 7 is inserted into the insertion groove 54, the elastic bulge 71 is limited in the limiting groove 55, and the purpose of fixing the position of the positioning plug-in 7 is achieved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides an eye vitreous syringe, characterized in that, includes syringe body (1) and locating component (2), locating component (2) including with connecting piece (3) that syringe body (1) is connected, with connecting piece (3) swing joint's setting element (4), setting element (4) have two operating position: under the first working position, the positioning side (41) of the positioning piece (4) is attached to the corneal limbus of the eye of a patient, the distance between the positioning side (41) of the positioning piece (4) and the needle point (11) of the injector body (1) is 3.5mm-4mm, and the needle point (11) is attached to the vitreous humor of the eye; under the second working position, the positioning piece (4) is separated from the eyeball of the patient, and the needle point (11) starts to inject after the needle is inserted.

2. The vitreous eye injector according to claim 1, characterized in that the positioning element (4) is connected with the connecting element (3) in a sliding manner, the sliding direction of the positioning element (4) is arranged in parallel with the axial direction of the injector body (1); the positioning piece (4) comprises a sliding block (5), and the connecting piece (3) is provided with a sliding groove (31) in sliding fit with the sliding block (5).

3. An eye vitreous injector according to claim 2, characterized in that said connecting element (3) is fixedly provided with a stop collar (32) which prevents said slider (5) from separating from it, said slider (5) being inserted in said stop collar (32).

4. An eye vitreous injector according to claim 3, characterized in that said slider (5) is convexly provided with a convex wall (51), an elastic element (6) is interposed between said limit convex ring (32) and said convex wall (51), and the extension direction of said elastic element (6) is parallel to the axial direction of said injector body (1).

5. The vitreous eye injector according to claim 2, characterized in that said slider (5) is fixedly provided with a pushing projection (52) for facilitating the operator to push said positioning element (4), said pushing projection (52) being provided with an anti-slip recess (53) on its surface.

6. An ophthalmic vitreous injector according to claim 2, characterized in that said positioning element (4) further comprises a positioning insert (7) adapted to engage the corneal limbus of the patient's eye, said positioning insert (7) being connected to said slider (5) by means of a plug-in connection.

7. An eye vitreous injector according to claim 6, characterized in that said slider (5) is provided with a slot (54) for inserting said positioning insert (7), the side walls of said slot (54) and of said positioning insert (7) being provided with a stop groove (55) and an elastic projection (71) in stop-and-fit engagement.

8. An ophthalmic vitreous injector according to claim 6, characterized in that the positioning end of the positioning insert (7) is provided in the shape of a crescent (8).

9. The vitreous ophthalmic injector according to claim 1, characterized in that said connecting element (3) is removably and fixedly connected to said injector body (1).

10. The vitreous eye syringe according to claim 9, characterized in that the connecting element (3) is fixedly provided with a plug-in block (33) which is in plug-in engagement with the grip handle (12) of the syringe body (1) and with a catch (34) which is in snap-in engagement with the sleeve (13) of the syringe body (1).