CN102895731A - Injection device for vitreous chamber - Google Patents

Abstract

The invention relates to a medical device, in particular to an injection device for a vitreous chamber. The injection device comprises an injector and a positioning guide device, wherein the injector comprises a needle cylinder and a needle head fixed in front of the needle cylinder. The positioning guide device comprises a needle head positioning block for being contacted with eyeballs and a needle head guide mechanism arranged on the needle head positioning block, wherein a needle hole for enabling the needle head to penetrate through is arranged in the middle of the needle head positioning block, and the length of the needle head penetrating out of the needle head positioning block is 10-13mm. According to the injection device, the needle head positioning block is used for accurately positioning the injection position, the needle head guide mechanism is used for ensuring the injection angle of the needle head, and the length of the needle head penetrating out of the positioning block is identical to the distance between the injection position and the surfaces of the eyeballs. When performing an operation, doctors only need to use the injector and the positioning guide device in a matching mode to directly and accurately perform injection on the vitreous chamber. The injection device for the vitreous chamber is easy and convenient to operate. Furthermore, by means of the injection device for the vitreous chamber, wide application of the vitreous chamber injection technology on the ophthalmology at the grass roots can be promoted.

Description

Translated fromChinese

一种玻璃体腔注射装置A vitreous cavity injection device

技术领域technical field

本发明涉及一种眼科的医疗设备，特别是一种玻璃体腔注射装置。The invention relates to an ophthalmic medical device, in particular to a vitreous cavity injection device.

背景技术Background technique

玻璃体腔内注射药物是控制感染性眼内炎，视网膜、葡萄膜炎，抑制增殖性玻璃体视网膜病变以及治疗糖尿病黄斑水肿等眼疾有效的给药途径，并日益显示出良好的临床效果和广泛的应用前景。但眼球是如此复杂及精密，如果对玻璃体腔注射时其注射部位、注射角度不慎偏离，就会造成眼球其他精细结构的损伤，因此，目前玻璃体腔的注射需要有经验的眼科医生在显微镜下确定好注射位置和注射角度后进行，操作繁琐，实施麻烦，还浪费了医院的资源，而且该注射对医生有较高的要求，需要获得相关资质的医院中才可以实施。由此可知，玻璃体腔注射的手术成本较高，限制其在医疗领域尤其是在基层医院中得到广泛的推广，不利于各阶层患者及时受益。 Intravitreal injection of drugs is an effective route of administration for controlling infectious endophthalmitis, retina, uveitis, inhibiting proliferative vitreoretinopathy, and treating diabetic macular edema, etc., and has increasingly shown good clinical effects and wide application prospect. However, the eyeball is so complex and precise that if the injection site and angle of the injection into the vitreous cavity are accidentally deviated, it will cause damage to other fine structures of the eyeball. After determining the injection position and injection angle, the operation is cumbersome, troublesome to implement, and wastes hospital resources. Moreover, the injection has high requirements for doctors, and it can only be implemented in hospitals that have obtained relevant qualifications. It can be seen that the high surgical cost of intravitreal injection limits its widespread promotion in the medical field, especially in grassroots hospitals, and is not conducive to the timely benefit of patients from all walks of life. the

发明内容Contents of the invention

为了克服上述技术问题，本发明的目的在于提供一种准确定位、方便施术的玻璃体腔注射装置。In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a vitreous cavity injection device with accurate positioning and convenient operation.

本发明所采用的技术方案是：The technical scheme adopted in the present invention is:

一种玻璃体腔注射装置，包括注射器和定位导向装置，所述注射器包括针筒和固定在针筒前端的针头，所述定位导向装置包括用于与眼球接触的针头定位块和在针头定位块上的针头导向机构，所述针头定位块中央设有供针头穿过的针孔，所述针头穿出针头定位块的长度为10-13mm。A vitreous cavity injection device, comprising a syringe and a positioning guide device, the syringe includes a syringe and a needle fixed at the front end of the syringe, the positioning guide device includes a needle positioning block for contact with the eyeball and a needle positioning block on the needle positioning block The needle guide mechanism, the center of the needle positioning block is provided with a needle hole for the needle to pass through, and the length of the needle passing through the needle positioning block is 10-13mm.

作为上述技术方案的进一步改进，所述针头定位块前端设有与眼球相对应的圆弧体，所述针孔中心线正对圆弧体的圆心，所述圆弧体上设有定位部，所述定位部与针孔中心线的距离为3-3.2mm，所述针头定位块后端设有与针筒底部相对应的限位部。As a further improvement of the above technical solution, the front end of the needle positioning block is provided with an arc body corresponding to the eyeball, the center line of the pinhole is directly facing the center of the arc body, and a positioning part is provided on the arc body. The distance between the positioning part and the center line of the needle hole is 3-3.2mm, and the rear end of the needle positioning block is provided with a limit part corresponding to the bottom of the syringe.

作为上述技术方案的进一步改进，所述定位部为圆弧体的圆弧面外边缘。As a further improvement of the above technical solution, the positioning portion is the outer edge of the arc surface of the arc body.

作为上述技术方案的进一步改进，所述针头定位块透明，所述定位部包括圆弧体上设置的标记刻度。As a further improvement of the above technical solution, the needle positioning block is transparent, and the positioning part includes a marking scale provided on the arc body.

作为上述技术方案的进一步改进，所述针孔与针头间隙配合，并作为针头导向机构。As a further improvement of the above technical solution, the needle hole is in clearance fit with the needle and serves as a needle guide mechanism.

作为上述技术方案的进一步改进，所述针头导向机构包括连接在针头定位块后端的外套筒，所述外套筒内部设有与针筒间隙配合的导向空腔，所述导向空腔的中心线与针孔中心线重合。As a further improvement of the above-mentioned technical solution, the needle guide mechanism includes an outer sleeve connected to the rear end of the needle positioning block, and a guide cavity that is clearance-fitted with the needle barrel is provided inside the outer sleeve, and the center of the guide cavity The line coincides with the centerline of the pinhole.

作为上述技术方案的进一步改进，所述针筒内设有注射腔，所述针头后端与注射腔的的前端平齐。As a further improvement of the above technical solution, an injection cavity is provided inside the syringe, and the rear end of the needle is flush with the front end of the injection cavity.

本发明的有益效果是：本发明用针头定位块对注射位置准确定位，用针头导向装置确保针头的注射角度，针头穿出定位块的长度与注射部位至眼球表面的距离相同，医生在手术时，只需将注射器和定位导向装置配合使用即可直接、准确的进行玻璃体腔注射，其操作简单方便，可以促进玻璃体腔注射术在眼科基层进行广泛的推广。The beneficial effects of the present invention are: the present invention uses the needle positioning block to accurately position the injection position, uses the needle guide device to ensure the injection angle of the needle, and the length of the needle penetrating the positioning block is the same as the distance from the injection site to the eyeball surface. , It can directly and accurately perform vitreous intravitreal injection only by using the syringe together with the positioning and guiding device.

附图说明Description of drawings

下面结合附图和实施方式对本发明进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

图1是本发明第一实施例的结构示意图；Fig. 1 is the structural representation of the first embodiment of the present invention;

图2是本发明第二实施例的结构示意图；Fig. 2 is the structural representation of the second embodiment of the present invention;

图3是本发明第三实施例的结构示意图。Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.

具体实施方式Detailed ways

如图1-图3所示，一种玻璃体腔注射装置，包括注射器和定位导向装置。注射器包括针筒1和固定在针筒1前端的针头2，针筒1内有活塞5和注射推杆12，注射推杆12推动活塞5将针筒1的注射腔内的药液从针头2打出。定位导向装置包括用于与眼球接触的针头定位块3和在针头定位块3上的针头导向机构，针头定位块3主要用于针头2的准确定位从而确认注射位置，针头导向机构主要是保证针头2注射入眼球的角度能对准眼球中心，防止伤害眼球的其他组织结构。针头定位块3中央设有供针头2穿过的针孔4，在注射时，针头2插入眼球的深度即为穿出针头定位块3的长度，这段距离为10-13mm，与玻璃体腔内的注射出液点的距离相同。因此医生在使用本发明的玻璃体腔注射装置时，只需要摆放好定位导向装置的位置，然后用注射器和定位导向装置配合即可直接准确、方便的实施玻璃体腔注射术。As shown in Figures 1-3, a vitreous cavity injection device includes a syringe and a positioning guide device. The syringe includes a syringe 1 and a needle 2 fixed on the front end of the syringe 1. There is apiston 5 and aninjection push rod 12 inside the syringe 1. Theinjection push rod 12 pushes thepiston 5 to transfer the liquid medicine in the injection chamber of the syringe 1 from the needle 2 play. The positioning and guiding device includes aneedle positioning block 3 for contact with the eyeball and a needle guiding mechanism on theneedle positioning block 3. Theneedle positioning block 3 is mainly used for accurate positioning of the needle 2 so as to confirm the injection position. The needle guiding mechanism is mainly to ensure that the needle 2. The angle of injection into the eyeball can be aimed at the center of the eyeball to prevent damage to other tissue structures of the eyeball. The center of theneedle positioning block 3 is provided with a pinhole 4 for the needle 2 to pass through. During injection, the depth to which the needle 2 is inserted into the eyeball is the length of theneedle positioning block 3. The distance from the injection outlet point is the same. Therefore, when the doctor uses the vitreous cavity injection device of the present invention, he only needs to place the position of the positioning guide device, and then use the syringe to cooperate with the positioning guide device to perform vitreous cavity injection directly, accurately and conveniently.

针头定位块3前端设有与眼球相对应的圆弧体6，圆弧体6直接放置在眼球表面，与眼球刚好贴合，既不会前后、左右摆动，又不容易脱离眼球，实现精确定位。针孔4中心线正对圆弧体6的圆心，该圆弧体6的圆心与眼球的球心同心，保证针孔4进入眼球时正对眼球球心。The front end of theneedle positioning block 3 is provided with anarc body 6 corresponding to the eyeball. Thearc body 6 is directly placed on the surface of the eyeball, and fits just right with the eyeball. . The center line of the pinhole 4 is facing the center of thearc body 6, and the center of thearc body 6 is concentric with the center of the eyeball, ensuring that the pinhole 4 is facing the center of the eyeball when it enters the eyeball.

由于在玻璃体腔注射术中，对针头2的注入点有严格的控制，根据不同年龄段的人来说，注入点到球心的连线至注入点的垂直距离为3-3.2mm，因此在圆弧体6上设定位部7，定位部7与针孔4中心线的距离为3-3.2mm。注射时，仅需将定位部7定位于角膜边缘即可。针头定位块3后端设有与针筒1底部相对应的限位部8，针筒1的最前端接触至限位部8后就不能继续前移，此时，针头2穿出针头定位块3的长度根据眼球大小的不同为10-13mm。Since the injection point of the needle 2 is strictly controlled in intravitreal injection, according to people of different age groups, the vertical distance from the line connecting the injection point to the center of the ball to the injection point is 3-3.2 mm, so in Apositioning portion 7 is set on thearc body 6, and the distance between thepositioning portion 7 and the centerline of the pinhole 4 is 3-3.2 mm. During injection, it is only necessary to position thepositioning part 7 on the edge of the cornea. The rear end of theneedle positioning block 3 is provided with astopper 8 corresponding to the bottom of the needle cylinder 1. After the front end of the needle cylinder 1 touches thelimiter 8, it cannot continue to move forward. At this time, the needle 2 passes through the needle positioning block. The length of 3 is 10-13mm according to the difference of eyeball size.

玻璃体腔注射术中所使用一般为进口而且是昂贵的药物，本着节约成本的目的，医生应该对其进行最大限度的利用。因此，针头2后端与注射腔的的前端平齐，输液期间保证了注射腔内所有的药物均能通过针头2注入玻璃体腔中。The drugs used in intravitreal injection are generally imported and expensive drugs. For the purpose of saving costs, doctors should make maximum use of them. Therefore, the rear end of the needle 2 is flush with the front end of the injection cavity, so that all the medicines in the injection cavity can be injected into the vitreous cavity through the needle 2 during the infusion.

图1为本发明的第一实施例，圆弧体6的圆弧面外边缘至针孔4中心的距离为3-3.2mm，即本实施例的定位部7，同时，针孔4的长度最好大于1mm，针孔4与针头2间隙配合，并作为针头导向机构，通过针孔4控制针头2的注射方向。Fig. 1 is the first embodiment of the present invention, the distance from the outer edge of the arc surface of thearc body 6 to the center of the pinhole 4 is 3-3.2 mm, which is thepositioning part 7 of the present embodiment, and at the same time, the length of the pinhole 4 Preferably greater than 1 mm, the needle hole 4 is in clearance fit with the needle 2 and serves as a needle guide mechanism to control the injection direction of the needle 2 through the needle hole 4 .

图2为本发明的第二实施例，针头定位块3由透明材质做成，圆弧体6上在距离针孔4中心3-3.2mm的位置设置了标记刻度9，作为本实施例的定位部7。同时，针孔4的长度最好大于1mm，针孔4与针头2间隙配合，并作为针头导向机构，通过针孔4控制针头2的注射方向。Fig. 2 is the second embodiment of the present invention, theneedle positioning block 3 is made of transparent material, and the marking scale 9 is set at the position of 3-3.2 mm from the center of the pinhole 4 on thearc body 6, as the positioning of thisembodiment Part 7. At the same time, the length of the pinhole 4 is preferably greater than 1mm, and the pinhole 4 is in clearance fit with the needle 2, and serves as a needle guide mechanism to control the injection direction of the needle 2 through the pinhole 4.

图3为本发明的第三实施例，圆弧体6的圆弧面外边缘至针孔4中心的距离为3-3.2mm，即本实施例的定位部7。针头导向机构包括连接在针头定位块3后端的外套筒10，外套筒10内部设有与针筒1间隙配合的导向空腔11，导向空腔11的中心线与针孔4中心线重合。需要注射时，针筒1放入导向空腔11中并沿导向空腔11的方向移动，通过导向空腔11控制针筒1从而控制针头2的移动方向，保证了注射的角度。Fig. 3 shows the third embodiment of the present invention, the distance from the outer edge of the arc surface of thearc body 6 to the center of the pinhole 4 is 3-3.2mm, which is thepositioning part 7 of this embodiment. The needle guide mechanism includes anouter sleeve 10 connected to the rear end of theneedle positioning block 3. Theouter sleeve 10 is provided with a guide cavity 11 that is loosely matched with the needle cylinder 1. The centerline of the guide cavity 11 coincides with the centerline of the needle hole 4 . When injection is required, the syringe 1 is put into the guide cavity 11 and moves along the direction of the guide cavity 11, and the needle cylinder 1 is controlled by the guide cavity 11 so as to control the moving direction of the needle 2, thereby ensuring the injection angle.

以上所述只是本发明优选的实施方式，其并不构成对本发明保护范围的限制。The above descriptions are only preferred embodiments of the present invention, and do not constitute a limitation to the protection scope of the present invention.

Claims (7)

1. intravitreal device, it is characterized in that: comprise syringe and locating guide device, described syringe comprises syringe (1) and is fixed on the syringe needle (2) of syringe (1) front end, described locating guide device comprises for the syringe needle locating piece (3) that contacts with eyeball and the syringe needle guiding mechanism on syringe needle locating piece (3), described syringe needle locating piece (3) central authorities are provided with the pin hole (4) that passes for syringe needle (2), and the length that described syringe needle (2) passes syringe needle locating piece (3) is 10-13mm.

2. intravitreal device according to claim 1, it is characterized in that: described syringe needle locating piece (3) front end is provided with the circular arc body corresponding with eyeball (6), described pin hole (4) centrage is over against the center of circle of circular arc body (6), described circular arc body (6) is provided with location division (7), described location division (7) is 3-3.2mm with the distance of pin hole (4) centrage, and described syringe needle locating piece (3) rear end is provided with the limiting section (8) corresponding with syringe (1) bottom.

3. intravitreal device according to claim 2, it is characterized in that: described location division (7) are the arc surface outward flange of circular arc body (6).

4. intravitreal device according to claim 2, it is characterized in that: described syringe needle locating piece (3) is transparent, and described location division (7) comprise the upper reference mark (9) that arranges of circular arc body (6).

5. intravitreal device according to claim 1 and 2 is characterized in that: described pin hole (4) and syringe needle (2) matched in clearance, and as the syringe needle guiding mechanism.

6. intravitreal device according to claim 1 and 2, it is characterized in that: described syringe needle guiding mechanism comprises the outer sleeve (10) that is connected to syringe needle locating piece (3) rear end, described outer sleeve (10) inside is provided with the guiding cavity (11) with syringe (1) matched in clearance, the centrage of described guiding cavity (11) and pin hole (4) central lines.

7. intravitreal device according to claim 1, it is characterized in that: described syringe is provided with injecting cavity in (1), described syringe needle (2) rear end and injecting cavity front end concordant.

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