Portable eye flute needle

Abstract

The utility model relates to the field of medical instruments, in particular to a portable eye flute needle which comprises a needle tube and a needle handle, the needle tube is of a hollow structure and is provided with a first through hole, and a liquid storage portion connected with the needle tube and communicated with an inner cavity is arranged on the front side of the needle handle. A second through hole close to the needle tube and an installation hole far away from the needle tube are formed in the liquid storage part, the installation hole is covered with an elastic film, and a third through hole is formed in the elastic film. According to the flute needle, the liquid drainage efficiency can be improved under the condition that the normal use requirement of the flute needle is met.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a portable ophthalmic flute needle. Background Art

[0002] An ophthalmic flute needle is a special tool used in ophthalmic surgeries. It is mainly used for anterior segment operations in intraocular surgeries, such as cataract surgeries, vitreous surgeries, corneal transplantation surgeries, etc. The flute needle is usually made of stainless steel or other corrosion-resistant materials and has a sharp tip and a slender handle for easy and precise operation by doctors. The ophthalmic flute needle mainly utilizes the pressure difference inside and outside the eyeball to adsorb and remove the intraocular fluid. During the operation, by pressing the small hole on the flute needle with a finger, the flow of the intraocular fluid can be controlled, similar to the action of playing a flute, so that the intraocular fluid flows out through the head-end pipe from the small hole. When the finger presses the small hole, the intraocular fluid stops flowing out. This structure makes the flute needle very useful in ophthalmic surgeries, such as the release of subretinal fluid, the aspiration of subretinal surface hemorrhage, gas-liquid exchange, and silicone oil replacement.

[0003] For a conventionally used flute needle, its structure can be as shown in the patent with the patent publication number CN202051899U. The flute needle shown in this patent includes a hollow needle tube, a screw bayonet, a silicone tube, and a needle handle. The hollow needle tube is connected to the needle handle through the screw bayonet. There is a hole on the side wall of the tail part of the hollow needle tube. The silicone tube is sleeved on the tail part of the hollow needle tube and covers the hole. The needle handle is hollow and has a window. The silicone tube is accommodated in the window of the needle handle and is closely attached to the cavity inside the flute needle handle. There is a small hole in the center of the silicone tube that is connected to the hole of the hollow needle tube. The needle tip of the flute needle is connected to the silicone tube and is airtight.

[0004] However, during clinical use, the flute needle with the above structure has the following technical problems: When using the flute needle for drainage / fluid release operation, the small hole on the silicone tube is relatively far from the tail end of the needle tube (to meet the requirements of liquid storage and blowing in practice), and it is a single-hole structure, resulting in a relatively slow drainage speed and low efficiency.

[0005] The above technical problems need to be solved. Content of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a portable ophthalmic flute needle to improve its drainage efficiency while meeting the normal use requirements of the flute needle.

[0007] To achieve the above purpose, a portable ophthalmic flute needle of the utility model includes a needle tube and a needle handle. The needle tube is of a hollow structure and is provided with a first through hole. A liquid storage part connected to the needle tube and having a communicating inner cavity is provided on the front side of the needle handle. The liquid storage part is provided with a second through hole close to the needle tube and an installation hole far from the needle tube. An elastic membrane covers the installation hole, and a third through hole is provided on the elastic membrane.

[0008] As a further improvement to the technical solution of the present utility model, the needle tube is of a straight tube structure or a bent tube structure.

[0009] As a further improvement to the technical solution of the present utility model, the needle handle is of a hollow structure and has an extension part at its rear side, and the inner cavity of the liquid storage part is isolated from the inner cavity of the extension part by an isolation block.

[0010] As a further improvement to the technical solution of the present utility model, the needle tube and the needle handle are connected by a thread pair.

[0011] As a further improvement to the technical solution of the present utility model, the front end of the needle tube is of a closed and smooth structure, and the first through hole is arranged on the side surface of the needle tube.

[0012] As a further improvement to the technical solution of the present utility model, the diameters of the second through hole and the third through hole are 0.8 - 1.5 mm.

[0013] As a further improvement to the technical solution of the present utility model, the distance between the second through hole and the front end face of the needle handle is 1.5 - 3.0 mm.

[0014] As a further improvement to the technical solution of the present utility model, the elastic membrane is made of rubber material, and the elastic membrane is fixed to the inner wall or outer wall of the liquid storage part along its edge and protrudes outward from the installation hole.

[0015] As a further improvement to the technical solution of the present utility model, the second through hole and the third through hole are respectively arranged on two opposite side surfaces of the liquid storage part.

[0016] As a further improvement to the technical solution of the present utility model, the installation hole and / or the elastic membrane are / is oval, circular or square.

[0017] Compared with the prior art, the present utility model has the following beneficial technical effects:

[0018] For a portable ophthalmic flute needle provided by the present utility model, during the drainage operation, the front end of the needle tube enters the vitreous cavity of the patient's eyeball. When both the second through hole and the third through hole are in an open state, the liquid (such as blood accumulation or heavy water, etc.) in the vitreous cavity flows to the liquid storage part under the action of intraocular pressure. The liquid first discharges from the second through hole. If the liquid flow rate is large and exceeds the discharge limit of the second through hole, then after reaching a certain volume of the liquid storage part, it can continue to discharge from the third through hole, thereby improving the drainage efficiency while meeting the normal use requirements of the flute needle.

[0019] The advantages of the additional aspects of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0020] Figure 1 This is the front view of the present utility model;

[0021] Figure 2 This is the rear view of the present utility model. Detailed Description of the Preferred Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings of the present utility model.

[0023] Embodiment 1

[0024] As Figure 1 and Figure 2 shown: This embodiment provides a flute needle, specifically a portable ophthalmic flute needle, which includes a needle tube 1 and a needle handle 2. The needle tube 1 is a hollow structure and is provided with a first through hole 3. A liquid storage part 21 that is connected to the needle tube 1 and has a communicating inner cavity is provided on the front side of the needle handle 2; the needle tube 1 can be made of stainless steel, and the first through hole 3 is used for communicating the inner cavity of the needle tube 1 with the outside; the length of the needle tube 1 can be 28-30 mm, and the diameter of the needle tube 1 can be 23G, 25G or 27G; the needle handle 2 can be made of medical plastic, and the liquid storage part 21 is a part of the needle handle 2, meeting the liquid storage requirement of the flute needle.

[0025] The main improvement of the portable ophthalmic flute needle provided in this embodiment lies in that: a second through hole 4 close to the needle tube 1 and a mounting hole 6 far from the needle tube 1 are provided on the liquid storage part 21, and an elastic membrane 7 is covered on the mounting hole 6, and a third through hole 5 is provided on the elastic membrane 7.

[0026] The distance between the second through hole 4 and the front end face of the needle handle 2 can be 1.5-3.0 mm, preferably 2.0 mm; the mounting hole 6 is provided at the rear side of the liquid storage part, so that there is a certain distance between the second through hole 4 and the third through hole 5; the diameters of the second through hole 4 and the third through hole 5 can be 0.8-1.5 mm, for example, 1.0 mm.

[0027] During the liquid discharge operation, the front end of the needle tube 1 enters the vitreous cavity of the patient's eyeball. When both the second through hole 4 and the third through hole 5 are in an open state, the liquid (such as blood accumulation or heavy water, etc.) in the vitreous cavity flows to the liquid storage part 21 under the action of intraocular pressure. The liquid first discharges from the second through hole 4. If the liquid flow rate is large and exceeds the discharge limit of the second through hole 4, then after reaching a certain volume of the liquid storage part 21, it can continue to discharge from the third through hole 5, thereby improving the liquid discharge efficiency while meeting the normal use requirements of the flute needle.

[0028] When performing the liquid blowing operation, the elastic membrane 7 can be pressed with the thumb outside the eyeball first, while the second through hole 4 is blocked with the index finger, and the perfusion liquid is inhaled into the inner cavity of the liquid storage part 21. Then, the syringe needle 1 is inserted into the vitreous cavity. In this way, when the second through hole 4 is blocked with the index finger, the thumb repeatedly presses and releases the elastic membrane 7, thus achieving the purpose of blowing liquid into the vitreous cavity. It is also possible not to inhale the perfusion liquid into the inner cavity of the liquid storage part 21, directly insert the syringe needle 1 into the vitreous cavity, block the second through hole 4 with the index finger, and at the same time open the third through hole 5. Then, the liquid in the vitreous cavity will naturally flow into the inner cavity of the liquid storage part 21. When it is filled to the position of the third through hole 5, continue to block the second through hole 4 and press the elastic membrane 7 with the thumb, and the liquid in the inner cavity of the liquid storage part 21 will flow back into the vitreous cavity, also achieving the purpose of blowing liquid into the vitreous cavity.

[0029] A portable eye flute needle provided in this embodiment may have the following advantages: First, the design is simple, convenient for assembly, and reduces the use cost; Second, the second through hole 4 is closer to the syringe needle 1, so that under the same intraocular pressure, the intraocular liquid can be discharged more quickly; Third, this flute needle can be designed as a disposable structure, and there is no situation where blood cells or tissue debris block the needle tip or small holes; Fourth, it is convenient to use. The doctor completely follows the traditional use method of the flute needle and still squeezes with the thumb to achieve the purpose of blowing liquid into the eye. At the same time, the opening and closing of the second through hole 4 are controlled by the index finger, which can not only stabilize the flute needle, but also make the liquid blowing and drainage functions of the flute needle more perfect by blocking and opening the third through hole 5 with the index finger.

[0030] In this embodiment, the syringe needle 1 can be a straight tube structure or a bent tube structure. The straight tube structure is suitable for occasions where liquid or gas needs to be transmitted linearly; the bent tube structure can bypass obstacles or reach areas that are difficult to directly contact, providing more flexibility and precision.

[0031] Embodiment 2

[0032] A portable eye flute needle provided in this embodiment is further improved on the basis of the structure and principle of the flute needle shown in Embodiment 1, and the same structure and principle will not be elaborated here.

[0033] In this embodiment, the needle handle 2 is a hollow structure and an extension part 22 is provided at the rear side thereof. The inner cavity of the liquid storage part 21 and the inner cavity of the extension part 22 are isolated by a partition block 8. The extension part 22 can increase the stability of the needle handle 2; the extension part 22 is also a hollow structure, which is convenient for the processing and manufacturing of the needle handle 2 and reduces the self-weight of the needle handle 2; the liquid storage part 21, the partition block 23 and the extension part 22 can be integrally formed, thereby reducing the processing difficulty.

[0034] In this embodiment, the syringe barrel 1 and the syringe handle 2 are connected by a thread pair. Threaded connection can provide good mechanical stability, ensuring that the syringe barrel 1 will not accidentally fall off during use, and at the same time can form a tight seal to prevent liquid or gas leakage; this structure also allows fine adjustment of the relative position between the syringe barrel 1 and the syringe handle 2 to meet different operation requirements.

[0035] In this embodiment, the front end of the syringe barrel 1 is a closed and smooth structure, and the first through hole 3 is provided on the side of the syringe barrel 1. The smooth front end design can reduce damage to eye tissues, especially in delicate ophthalmic surgeries; the first through hole 3 on the side may enable the syringe barrel 1 to interfere less with the target area during insertion, and also enable the operator to more easily control the direction of the syringe barrel 1 and the outflow of liquid during surgery or treatment.

[0036] In this embodiment, the elastic membrane 7 is made of rubber, and the elastic membrane 7 is fixed to the inner wall (or outer wall) of the liquid storage part 21 along its edge and protrudes outward from the mounting hole 6. The elastic membrane 7 made of rubber can provide a good sealing effect; the outwardly protruding elastic membrane 7 may enable the operator to control the liquid flow through simple pressing or releasing actions; the elastic membrane 7 can be fixed to the liquid storage part 21 by bonding, for example. According to the usage requirements, the mounting hole 6 and the elastic membrane 7 can be oval, circular or square.

[0037] In this embodiment, the second through hole 4 and the third through hole 5 are respectively provided on two opposite sides of the liquid storage part 21. The two through holes are located on opposite sides of the liquid storage part 21, which helps to balance the pressure inside the liquid storage part 21, reduce liquid flow problems caused by uneven pressure, and at the same time helps to reduce the risk of misoperation and improve the convenience of use.

[0038] The above are only the embodiments of the present invention, and common knowledge such as specific structures and characteristics known in the solutions is not described in detail here. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. A portable eye flute needle, comprising a needle tube and a needle handle. The needle tube is of a hollow structure and is provided with a first through hole. A liquid storage part connected to the needle tube and having a communicating inner cavity is provided on the front side of the needle handle. It is characterized in that: The liquid storage part is provided with a second through hole close to the needle tube and a mounting hole far from the needle tube. An elastic membrane covers the mounting hole, and a third through hole is provided on the elastic membrane.

2. The portable eye flute needle according to claim 1, characterized in that: The needle tube is of a straight tube structure or a bent tube structure.

3. The portable eye flute needle according to claim 1, characterized in that: The needle handle is of a hollow structure, and an extension part is provided on its rear side. The inner cavity of the liquid storage part is isolated from the inner cavity of the extension part by an isolation block.

4. The portable eye flute needle according to claim 1, characterized in that: The needle tube and the needle handle are connected by a thread pair.

5. The portable eye flute needle according to claim 1, characterized in that: The front end of the needle tube is closed and smooth, and the first through hole is provided on the side surface of the needle tube.

6. The portable eye flute needle according to any one of claims 1 to 5, characterized in that: The diameters of the second through hole and the third through hole are 0.8 - 1.5 mm.

7. The portable eye flute needle according to any one of claims 1 to 5, characterized in that: The distance between the second through hole and the front end face of the needle handle is 1.5 - 3.0 mm.

8. The portable eye flute needle according to any one of claims 1 to 5, characterized in that: The elastic membrane is made of rubber, and the edge of the elastic membrane is fixed to the inner wall or outer wall of the liquid storage part and protrudes outward from the mounting hole.

9. The portable eye flute needle according to any one of claims 1 to 5, characterized in that: The second through hole and the third through hole are respectively provided on two opposite side surfaces of the liquid storage part.

10. The portable eye flute needle according to any one of claims 1 to 5, characterized in that: The mounting hole and / or the elastic membrane are / is oval, circular or square.

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