Multifunctional syringe needle for cataract surgery

Abstract

The utility model discloses a multifunctional injection needle for cataract surgery, which is provided with a Helon water injection needle body, the water injection needle body is a bent metal needle, and the water outlet part of the needle point part is of an annular structure, and is characterized in that the bent part is positioned at the one third part of the needle point part close to the needle point part, and the bent part is in a smooth transition form; the outer ring at the water outlet is arranged in a fillet manner to form a smooth surface, and the smooth surface is precisely polished by a grinding wheel or an abrasive belt to form a frosted surface, The utility model has the advantages that the device can be used immediately after being opened, the operation is safer, particularly, the possibility of scratching the posterior capsule of the crystal, the cornea epithelium and the endodermis is greatly reduced, the operation safety is increased, and the operation efficiency is improved. The polisher has the functions of polishing and viscoelastic agent filling, avoids the problem that a common polisher frequently enters and exits an incision, so that the risk that the incision is torn and infected is increased, improves the polishing efficiency, and meanwhile is extremely low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the field of medicine and health, and specifically relates to an improved ophthalmic cataract surgical instrument. Background Art

[0002] Cataract is a disease in which the lens part of the eye becomes cloudy due to various reasons, resulting in visual impairment. Its common types include senile cataract, complicated cataract, traumatic cataract, metabolic cataract, etc., and senile cataract is particularly common. The causes are diverse, such as aging, genetics, local nutritional disorders, immune and metabolic abnormalities, etc. In addition, exposure to strong light, smoking and alcoholism, malnutrition, long-term use of glucocorticoids, etc. will all increase the risk of cataract. Cataract is the leading cause of blindness globally, especially common in the elderly. Currently, the only effective way to treat cataract is cataract surgery, which requires removing the cloudy lens and then implanting an artificial lens to restore the patient's vision. During the process of removing the cloudy lens, it is necessary to carefully remove the lens nucleus and cortex, leaving the lens capsule to implant the artificial lens. However, in the actual surgical process, since the cortex and the posterior capsule of the lens are usually closely attached, a small part of the cortex often remains on the surface of the posterior capsule. And this small part of the cortex will continue to proliferate in many patients (15%-50% of adults, almost 100% of children) after surgery, resulting in the patient suffering from posterior capsular cataract, that is, the posterior capsule surface of the patient who has completed cataract surgery becomes cloudy again due to the proliferation of the cortex. This requires the surgeon to carefully and patiently polish the posterior capsule during the operation to minimize the remaining cortex on the posterior capsule.

[0003] Currently, there are 2 commonly used polishing tools.

[0004] One is a metal ring-shaped polisher, made of metal, with a separate handle, and the front end is a circular polishing head. This kind of polisher is rarely used during the operation because the polishing head is designed to be relatively sharp and is likely to cut the posterior capsule, causing vitreous overflow. If the break is large, it is impossible to implant an artificial lens in the capsule. And this kind of polisher has a single function, which is equivalent to adding an extra surgical step, increasing the operation time, reducing the surgical efficiency, and also requires entering and exiting the surgical incision multiple times, increasing the risk of incision tearing and infection. This kind of polisher needs to be sterilized by high temperature and high pressure before each use. If the surgeon has consecutive surgeries, he may need to wait for it to be sterilized, delaying the surgical process. And the single cost is very high.

[0005] The second is a polishing head that can be connected to the irrigation and aspiration handle of the phacoemulsifier, which is equipped by the phacoemulsifier manufacturer. It is made of high molecular material and is for single use. It can both aspirate the cortex and polish the posterior capsule. This kind of tool is currently the perfect polishing tool, but unfortunately the cost is too high and no one in China uses it currently. Content of the Utility Model

[0006] To solve the above problems, the present utility model discloses a multifunctional injection needle for cataract surgery.

[0007] The specific technical solution is as follows: Specific Embodiment 1:

[0009] A multifunctional injection needle for cataract surgery is provided with a Helon water injection needle body. The water injection needle body is a bent metal needle. The water outlet at the tip part is a ring structure. The bending part is at one-third of the needle body near the tip part, and the bending part has a smooth transition form. A fillet is provided on the outer circle of the water outlet to form a smooth surface. The smooth surface is precisely polished by a grinding wheel or a sand belt to form a frosted surface.

[0010] The fillet on the outer circle of the water outlet is a structure that transitions from the inner circle edge of the water outlet to the outer circle.

[0011] A fillet is also provided on the inner circle of the water outlet, also forming a smooth surface, which can further increase the safety of the needle during operation.

[0012] When the injection needle is installed on the viscoelastic syringe, the frosted surface forms a polished surface with the injected viscoelastic.

[0013] When the injection needle is installed on the water injection syringe, the frosted surface forms an attachment surface with the injected water droplets. The surface roughness of the frosted surface is 3.2μm - 6.3μm.

[0014] The advantages of the present utility model are as follows: It can be used immediately. After the needle is polished, it is sterilized and packaged aseptically, and can be stored for a long time. When in use, just open the package and it can be used without the need for high-temperature and high-pressure sterilization again, improving the surgical efficiency. The sharp angles of the needle are removed, making the surgery safer, especially for the posterior capsule of the lens, corneal epithelium, and endothelium, greatly reducing the possibility of scratching and cutting, increasing the surgical safety. When installed on the viscoelastic syringe, it has the functions of polishing and filling viscoelastic, avoiding the frequent entry and exit of a common polisher into the incision, thus increasing the risk of incision tearing and infection. The outer circle surface adopts a fine frosted design, increasing the polishing efficiency. At the same time, the cost of the present utility model is extremely low. Description of the Drawings

[0015] Figure 1 Schematic diagram of the needle structure of the prior art;

[0016] Figure 2 Schematic diagram of the structure of the present utility model;

[0017] Figure 3 Schematic diagram of the usage process;

[0018] Figure 4This is a schematic cross-sectional view of the needle part of the present utility model;

[0019] Figure 5 It is a schematic structural diagram of the second specific embodiment. Specific implementation manners Specific embodiment one:

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] A multifunctional injection needle for cataract surgery is provided with a Helon water injection needle body 1. The water injection needle body 1 is a bent metal needle. The water outlet 2 at the tip part is of a ring structure. The bending part 3 is at one-third of the needle near the tip part, and the bending part has a smooth transition form. A fillet is provided on the outer circle of the water outlet 2 to form a smooth surface. The smooth surface is precisely polished by a grinding wheel or a sand belt to form a matte surface 4. The surface roughness of the matte surface 4 is 3.2 μm - 6.3 μm.

[0023] As Figure 4 shown, the fillet on the outer circle of the water outlet is a structure that transitions from the inner circle edge of the water outlet to the outer circle.

[0024] As Figure 4 shown, a fillet is provided on the inner circle of the water outlet.

[0025] When the injection needle is installed on the viscoelastic syringe, polishing work can be carried out while pushing the viscoelastic agent. Further separate the cortex of the posterior capsule. Use the matte surface of the needle to reciprocate or circle and rub the surface of the lens posterior capsule for polishing. While polishing, push the viscoelastic agent from the needle. Utilize the rigidity, coating property and viscosity of the viscoelastic agent. After rubbing off the cortex adhering to the surface of the posterior capsule, it is immediately pushed away by the viscoelastic agent and further separated from the capsule membrane. At the same time, it prepares for the next step of installing the lens (viscoelastic agent needs to be filled before installing the lens). It is equivalent to combining the steps of polishing and filling the viscoelastic agent into one. And due to the fillet setting of the water outlet, it is very difficult for the needle to cut through the posterior capsule, increasing the safety of the surgery.

[0026] As Figure 3As shown, when the injection needle is installed on the water injection syringe, the frosted surface forms an attachment surface with the pushed water droplets. Due to the frosted surface structure of the present utility model, when corneal watering is performed, the water droplets will adhere to the frosted surface to form an attachment surface. Compared with conventional injection needles, the overall position of the water droplets at the water outlet is in the shape of a water droplet. The advantage of setting the frosted surface structure is that when the water droplets are at the water outlet, the water droplets will spread flat near the surface of the frosted surface, which is convenient for the operator to operate. When the water outlet of the needle contacts the contact surface, the frosted surface forms a "bridge" to transfer the water droplets at the water outlet to the surface of the contact surface, greatly reducing the working difficulty of the operator; at the same time, due to the chamfering at the inner and outer circles of the water outlet, when the operator accidentally scratches the needle on the corneal epithelium surface and the endothelium surface, it will not cause damage.

[0027] As Figure 2 shown, compared with Figure 1 the water outlet, Figure 2 the water outlet is easier to insert into the corneal lamella. In the last step of cataract surgery, when making a water-tight incision, the operation is more convenient. In many intraocular surgeries (including cataract surgery, vitreoretinal surgery, etc.), due to various reasons, the patient's corneal epithelium will become edematous. Once edematous, the intraocular structure will become blurred and the operation cannot be performed. At this time, the usual solution is to scrape the corneal epithelium with a corneal epithelial scraper and then continue the operation. The corneal epithelial scraper is a blunt scraper to prevent damage to the corneal anterior elastic layer and stromal layer during scraping. The multifunctional needle of this design can also be used instead of the corneal epithelial scraper. Its rounded corner design will not damage the corneal anterior elastic layer and stromal layer, and the frosted design increases the efficiency of scraping corneal epithelial cells. When scraping the epithelium, it is necessary to flush water simultaneously to wash away the scraped epithelial tissue. Therefore, when this needle is installed on the water injection tube, it can also flush water simultaneously, reducing the surgical steps and the number of operators, achieving multiple benefits at once.

[0028] Specific Embodiment 2: As Figure 5 shown, the present utility model further discloses an injection needle, whose structure is the same as the overall structure of Specific Embodiment 1. The difference is that an inclined surface 6 is provided at the lower bottom end of the water outlet 2. The purpose of this is to increase the curvature of the water outlet, which can play a guiding role for the water droplets, so that the water droplets can spread flat on the inclined surface better.

Claims

1. A multifunctional injection needle for cataract surgery, provided with a Helon water injection needle body, the water injection needle body is a bent metal needle, the water outlet at the needle tip is a ring structure, characterized in that: The bend is located at one-third of the needle tip, and the bend is a smooth transition shape. The outer circle at the water outlet is chamfered to form a smooth surface, which is precisely polished by a grinding wheel or a grinding belt to form a frosted surface.

2. The multifunctional injection needle for cataract surgery according to claim 1, characterized in that: The rounded corner of the outer ring of the water outlet is a structure where the edge of the inner ring of the water outlet transitions to the outer ring.

3. The multifunctional injection needle for cataract surgery according to claim 1, characterized in that: The inner circle of the water outlet is rounded.

4. The multifunctional injection needle for cataract surgery according to claim 1, characterized in that: The surface roughness of the frosted surface is 3.2 μm-6.3 μm.

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