Anterior chamber puncture needle

Abstract

The embodiment of the utility model relates to the field of medical instruments for ophthalmology, in particular to an anterior chamber puncture needle which comprises a needle cylinder and a pintle, and the pintle is slidably arranged in the needle cylinder in the axial direction of the needle cylinder. A sliding groove extending in the axial direction of a needle cylinder is formed in the side wall of the needle cylinder of the anterior chamber puncture needle. The anterior chamber puncture needle further comprises an operation part, the operation part is connected with the pintle, and the operation part can slide along the sliding groove under the action of external force so as to drive the pintle to slide in the axial direction relative to the needle cylinder. According to the anterior chamber puncture needle provided by the embodiment of the utility model, the chute and the operation part are arranged, so that a doctor can push the operation part while holding the needle cylinder by a single hand, and intraocular tissues can be prevented from being damaged when anterior chamber puncture operation by the single hand is realized.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical devices for ophthalmology, and specifically to an anterior chamber puncture needle. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] Anterior chamber puncture is a commonly used operation in ophthalmology. Currently, there is no special instrument for anterior chamber puncture. In actual clinical work, 1ml syringes are often used as puncture needles for anterior chamber puncture. When doctors use syringes as puncture needles for anterior chamber puncture, they need to operate the slit lamp microscope with one hand to observe the structure of the eyeball, and operate the syringe with the other hand, which can easily damage intraocular tissues such as the corneal endothelium, iris or lens. Utility Model Content

[0004] A brief overview of the present application is provided below in order to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify the key or important parts of the present application, nor is it intended to limit the scope of the present application. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0005] In view of the above technical problems, an embodiment of the present application provides an anterior chamber puncture needle, which includes a syringe and a needle bolt, and the needle bolt is slidably arranged in the syringe along the axial direction of the syringe. The side wall of the syringe of the anterior chamber puncture needle is provided with a slide groove extending along the axial direction of the syringe. The anterior chamber puncture needle also includes an operating part, which is connected to the needle bolt, and the operating part is configured to slide along the slide groove under the action of an external force to drive the needle bolt to slide axially relative to the syringe.

[0006] Furthermore, the anterior chamber puncture needle may also include a needle mounting seat, which is arranged at one end of the syringe and is used to mount the needle, and the end surface of the needle mounting seat facing away from the syringe is an inclined surface.

[0007] Furthermore, the angle between the inclined surface and the cross section of the syringe can be 40-50 degrees.

[0008] Furthermore, the maximum distance between the inclined surface and the syringe is located on the same radial side of the syringe as the slide groove.

[0009] Furthermore, the anterior chamber puncture needle may also include an auxiliary gripping portion, which is disposed at the end of the syringe away from the needle mounting seat and is used to assist in holding the syringe.

[0010] Furthermore, the anterior chamber puncture needle may also include a needle and a needle cap, wherein the needle is arranged on a needle mounting seat, and the needle cap is detachably connected to the syringe or the needle mounting seat to cover the needle.

[0011] Furthermore, the side wall of the syringe is provided with scales along the axial direction of the syringe.

[0012] Furthermore, the anterior chamber puncture needle may further include a sealing portion, which is disposed at the end of the needle plug located in the syringe.

[0013] Furthermore, the anterior chamber puncture needle may further include another operating portion, and the other operating portion is arranged at the end of the needle plug located outside the syringe.

[0014] Furthermore, the outer diameter of the needle may be 0.33 mm, the inner diameter may be 0.2 mm, and the length may be 5 mm.

[0015] The anterior chamber puncture needle provided in the embodiment of the present application is provided with a slide groove and an operating part, so that the doctor can push the operating part while holding the syringe with one hand, which is helpful to avoid damaging the intraocular tissue when performing the one-handed anterior chamber puncture operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other objects and advantages of the present application will become apparent from the following description of the embodiments of the present application with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present application.

[0017] Figure 1 It is a schematic diagram of the structure of the anterior chamber puncture needle provided in the embodiment of the present application.

[0018] Figure 2 yes Figure 1 The schematic diagram of the structure of the anterior chamber puncture needle shown omits the needle cap and the needle.

[0019] Figure 3 It is a schematic diagram of performing anterior chamber puncture operation using the anterior chamber puncture needle provided in an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100. Anterior chamber puncture needle;

[0022] 10. syringe; 11. slide groove; 12. scale; 20. needle bolt; 30. operating part; 40. needle mounting seat; 41. inclined surface; 50. auxiliary gripping part; 60. needle; 70. needle cap; 80. sealing part; 90. another operating part;

[0023] 200. Eyeball;

[0024] 201. Corneal limbus; 202. Anterior chamber; 203. Lens; 204. Iris.

[0025] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present application will be described below in conjunction with the accompanying drawings. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary from implementation to implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is only a routine task for those skilled in the art who benefit from the content of this application.

[0027] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, the accompanying drawings only show the device structure and / or processing steps that are closely related to the scheme according to the present application, while other details that are not closely related to the present application are omitted.

[0028] The embodiment of the present application provides an anterior chamber puncture needle. Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram showing the structure of an anterior chamber puncture needle provided in an embodiment of the present application is shown. Figure 2 Show Figure 1 The anterior chamber puncture needle 100 is a schematic diagram of the structure after omitting the needle cap and the needle head. The anterior chamber puncture needle 100 may include a syringe 10 and a needle plug 20, and the needle plug 20 is slidably arranged in the syringe 10 along the axial direction of the syringe 10. In particular, the side wall of the syringe 10 of the anterior chamber puncture needle 100 is provided with a slide groove 11 extending along the axial direction of the syringe 10. The anterior chamber puncture needle 100 also includes an operating part 30, which is connected to the needle plug 20, and the operating part 30 is configured to be able to slide along the slide groove 11 under the action of an external force, so as to drive the needle plug 20 to slide axially relative to the syringe 10.

[0029] The anterior chamber puncture needle 100 provided in the embodiment of the present application is provided with a slide groove 11 and an operating part 30, so that the doctor can use the thumb of one hand to operate the operating part 30 to slowly drive the operating part 30 to slide relative to the slide groove 11 while holding the syringe 10 in one hand. In this way, after the doctor inserts the needle into the patient's anterior chamber, he can operate the anterior chamber puncture needle 100 with one hand to extract fluid from the anterior chamber, and use the other hand to operate the slit lamp microscope to observe the structure of the eyeball.

[0030] It is easy to understand that when using the anterior chamber puncture needle 100 to collect aqueous humor, the doctor operates with one hand to slide the operating part 30 relative to the slide groove 11 in a direction away from the patient, thereby extracting aqueous humor from the anterior chamber, and the extracted aqueous humor can enter the syringe 10.

[0031] In the related art, a 1 ml syringe is usually used for anterior chamber puncture. When using a 1 ml syringe to extract aqueous humor, since the doctor uses one hand to operate the slit lamp microscope to observe the structure of the eyeball, the syringe can only be operated with one hand (specifically, the syringe is fixed with the thumb and index finger, and the remaining fingers are used to apply force to pull the needle plug to move in the syringe), and the extraction speed and extraction amount are difficult to accurately control. If the extraction speed is too fast or too much, it will cause a sudden drop in intraocular pressure, the anterior chamber will quickly become shallow or even disappear, and the intraocular tissue may be damaged. A sudden drop in intraocular pressure may also cause other complications, such as anterior chamber hemorrhage, ciliary body detachment, choroidal detachment, explosive suprachoroidal hemorrhage, etc.

[0032] When using the anterior chamber puncture needle 100 provided in the embodiment of the present application to extract aqueous humor, the doctor can use the thumb of one hand to apply force to the operating part 30 to slowly drive the operating part 30 to slide relative to the slide groove 11 while holding the syringe 10 in one hand. Since the thumb can more accurately adjust the applied force, it is easier to accurately control the extraction speed and extraction amount, so that the intraocular pressure drops slowly, which is beneficial to maintaining the stability of the anterior chamber and avoiding damage to intraocular tissues. At the same time, holding the syringe 10 in one hand is more conducive to ensuring the stability of the needle tip and avoiding damage to intraocular tissues such as the corneal endothelium, iris or lens.

[0033] In some embodiments, the outer diameter of the needle 60 is 0.33 mm, the inner diameter is 0.2 mm, and the length is 5 mm. The outer diameter of the needle in the traditional 1 ml syringe is 0.45 mm, and the inner diameter is 0.25 mm. When the 1 ml syringe is used to perform the anterior chamber 202 puncture operation, the puncture port is large and the airtightness is poor, which easily causes the puncture port to leak aqueous humor after the anterior chamber puncture. At the same time, the puncture port is directly connected to the outside world, increasing the risk of intraocular infection. The needle 60 of the anterior chamber puncture needle 100 provided in the embodiment of the present application is thinner, the puncture port of the needle 60 is small, the airtightness is good, and the puncture port of the needle 60 is not easy to communicate with the outside world, which can effectively reduce the risk of intraocular infection.

[0034] In some embodiments, the operating part 30 is located outside the syringe 10. The anterior chamber puncture needle 100 may include a connecting rod, and the operating part 30 is connected to the needle plug 20 through the connecting rod. The operating part 30 may have a disc shape, for example.

[0035] In some embodiments, the anterior chamber puncture needle 100 can be a disposable device.

[0036] In some embodiments, the total length of the syringe 10 may be 90 mm, the outer diameter may be 6.5 mm, the inner diameter may be 5 mm, and the total volume may be 1 mL.

[0037] See also Figure 1 and Figure 2 In some embodiments, the side wall of the syringe 10 is provided with a scale 12 along the axial direction of the syringe 10, so that the doctor can accurately control the extraction speed and amount of aqueous humor by observing the scale.

[0038] In some embodiments, there may be multiple scales 12 on the side wall of the syringe 10, for example, 40, each scale 12 representing 0.025 mL. The chute 11 starts from the 15th scale 12 and ends at the 30th scale 12. Theoretically, a maximum of 0.275 ml of aqueous humor can be extracted.

[0039] In some embodiments, the syringe 10 may be made of transparent plastic material, which facilitates the doctor to observe the liquid in the syringe 10 .

[0040] See also Figure 1 and Figure 2 In some embodiments, the anterior chamber puncture needle 100 may further include a needle mounting seat 40, which is disposed at one end of the syringe 10 and is used to mount the needle 60, and the end surface of the needle mounting seat 40 facing away from the syringe 10 is a slope 41. Figure 3 , which shows a schematic diagram of performing an anterior chamber 202 puncture operation using the anterior chamber puncture needle 100 provided by an embodiment of the present application. When in use, the maximum distance between the bevel 41 and the syringe 10 is closer to the middle of the cornea, and the minimum distance between the bevel 41 and the syringe 10 is closer to the limbus 201. It can be seen that the bevel 41 can not only limit the depth of the needle 60 piercing the anterior chamber 202, but also help fix the eyeball 200 and maintain the stability of the needle 60 in the anterior chamber 202, reducing the risk of accidental injury to intraocular tissues.

[0041] See also Figure 1 and Figure 2 In some embodiments, the angle between the bevel 41 and the cross section of the syringe 10 is 40-50 degrees. Preferably, the angle between the bevel 41 and the cross section of the syringe 10 is 45 degrees.

[0042] See also Figure 1 and Figure 2In some embodiments, the maximum distance between the inclined surface 41 and the syringe 10 is located on the same radial side of the syringe 10 as the chute 11. In other words, the maximum distance between the inclined surface 41 and the syringe 10 is the distance between the portion of the inclined surface 41 closest to the center line of the chute 11 and the syringe 10. In other words, the maximum distance between the inclined surface 41 and the syringe 10 and the projection center of the chute 11 in a cross section perpendicular to the syringe 10 are located on the same radius of the cross section of the syringe 10. With this arrangement, when extracting aqueous humor, the inclined surface 41 can be directed downward while the operating portion 30 is directed upward, so that the doctor can use the thumb to operate the operating portion 30 when extracting aqueous humor, so as to better control the extraction speed and amount of aqueous humor.

[0043] See also Figure 1 In some embodiments, the anterior chamber puncture needle 100 further includes an auxiliary gripping portion 50, which is disposed at the end of the syringe 10 away from the needle mounting seat 40, and is used to assist the doctor in holding the syringe 10. The auxiliary gripping portion 50 is conducive to the doctor being able to hold the syringe 10 more stably with one hand.

[0044] In some embodiments, the auxiliary grip 50 can also be used for the doctor to hold the syringe 10 when expelling the liquid in the syringe 10 .

[0045] In some embodiments, the auxiliary gripping portion 50 may be two ear-shaped protrusions extending in a direction perpendicular to the axial direction of the syringe 10, and the ear-shaped protrusions are convenient for the doctor to hold. The two ear-shaped protrusions may be located on both sides of the slide slot 11, so that the doctor can use the thumb to apply force to the operating portion 30 while holding the syringe 10 and the auxiliary gripping portion 50 in one hand.

[0046] See also Figure 1 In some embodiments, the anterior chamber puncture needle 100 may further include a needle 60 and a needle cap 70. The needle 60 is disposed on the needle mounting seat 40; the needle cap 70 is detachably connected to the syringe 10 or the needle mounting seat 40 to cover the needle 60 therein.

[0047] See also Figure 3 In some embodiments, the needle 60 and the needle mounting seat 40 are coaxially arranged.

[0048] In some embodiments, the end surface of the needle 60 away from the syringe 10 is a bevel to increase the sharpness of the needle 60 and facilitate the needle 60 to penetrate into the anterior chamber 202 .

[0049] In some embodiments, the needle cap 70 can cover the needle 60 when the anterior chamber puncture needle 100 is not in use, protecting the needle 60 and preventing accidental injury. When the anterior chamber puncture needle 100 is in use, the needle cap 70 can be removed to perform an anterior chamber 202 puncture operation.

[0050] See also Figure 1 and Figure 2 In some embodiments, the anterior chamber puncture needle 100 may further include a sealing portion 80 , which is disposed at the end of the needle plug 20 located inside the syringe 10 .

[0051] In some embodiments, the sealing portion 80 may be a sealing rubber plug, the diameter of which is slightly larger than the inner diameter of the syringe 10 to ensure the sealing of the syringe 10 .

[0052] See also Figure 1 and Figure 2 In some embodiments, the anterior chamber puncture needle 100 may further include another operating portion 90, which is disposed at the end of the needle plug 20 located outside the syringe 10. The other operating portion 90 may be a tail push handle formed at the end of the needle plug 20. The other operating portion 90 may have a disc shape, for example. In some embodiments, the doctor may push the other operating portion 90 to discharge the liquid in the syringe 10.

[0053] Combination Figure 3 , the operation process of puncturing the anterior chamber 202 of the eyeball 200 and collecting aqueous humor using the anterior chamber puncture needle 100 provided in the embodiment of the present application is described, and the operation process is performed under a slit lamp microscope.

[0054] See also Figure 3 The operator holds the barrel 10 of the anterior chamber puncture needle 100 with his thumb and the other four fingers, and punctures the needle 60 from the corneal limbus 201 into the anterior chamber 202. The inclined surface 41 of the needle mounting seat 40 fits with the arc surface of the corneal limbus 201, and the inclined surface of the needle 60 faces the direction of the corneal apex. The puncture direction of the needle 60 is adjusted so that the puncture direction of the needle 60 is basically parallel to the plane where the iris 204 is located to avoid damaging the intraocular structures such as the iris 204 and the lens 203.

[0055] The operation part 30 is pushed with the thumb to slowly extract a proper amount of aqueous humor, and the amount of aqueous humor extracted can be read by the scale 12. During the process of extracting aqueous humor, the extraction speed of aqueous humor needs to be controlled by the thumb to slowly reduce the pressure in the anterior chamber 202, ensuring that the anterior chamber 202 is always stable during the process of extracting aqueous humor, avoiding sudden drop in intraocular pressure or damage to the intraocular structure by the needle 60.

[0056] After the aqueous humor is extracted, the needle 60 of the anterior chamber puncture needle 100 is pulled out from the anterior chamber 202. Since the needle 60 is relatively thin, the puncture hole left by the needle 60 can be closed under the elastic action of the corneal limbus 201. If the aqueous humor needs to be examined later, the aqueous humor can be discharged from the syringe 10 by pushing the other operating part 90 or the operating part 30.

[0057] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0058] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An anterior chamber puncture needle, comprising: A syringe and a needle bolt, wherein the needle bolt is slidably arranged in the syringe along the axial direction of the syringe, characterized in that: The side wall of the needle cylinder is provided with a slide groove extending along the axial direction of the needle cylinder; The anterior chamber puncture needle further comprises: an operating part, the operating part is connected to the needle bolt, and the operating part is configured to slide along the slide groove under the action of an external force to drive the needle bolt to slide axially relative to the syringe; The anterior chamber puncture needle also includes: The needle mounting seat is arranged at one end of the syringe and is used to mount the needle. The end surface of the needle mounting seat facing away from the syringe is an inclined surface; The anterior chamber puncture needle also includes: The needle is arranged on the needle mounting seat, and the length of the needle is 5 mm.

2. The anterior chamber puncture needle according to claim 1, characterized in that: The angle between the inclined surface and the cross section of the syringe is 40-50 degrees.

3. The anterior chamber puncture needle according to claim 1, characterized in that: The maximum distance between the inclined surface and the syringe is located on the same radial side of the syringe as the sliding groove.

4. The anterior chamber puncture needle according to claim 1, characterized in that: Also includes: The auxiliary holding portion is arranged at the end of the syringe away from the needle mounting seat and is used for assisting the holding of the syringe.

5. The anterior chamber puncture needle according to claim 1, characterized in that: The side wall of the syringe is provided with scales along the axial direction of the syringe.

6. The anterior chamber puncture needle according to claim 1, characterized in that: Also includes: The sealing portion is arranged at the end of the needle plug located in the syringe.

7. The anterior chamber puncture needle according to any one of claims 1 to 6, characterized in that: Also includes: Another operating part is arranged at the end of the needle plug located outside the syringe.

8. The anterior chamber puncture needle according to claim 1, characterized in that: The outer diameter of the needle is 0.33 mm, and the inner diameter is 0.2 mm.

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