Safe vitreous body injection device

Abstract

The utility model discloses a safe vitreous body injection device which comprises a needle cylinder, a piston and a piston rod driving the piston to move are arranged in the needle cylinder, a needle head is inserted into the head of the needle cylinder, a circular ring is integrally formed on the tail portion of the needle head, and a cylindrical clamping column is integrally formed on the outer wall of the circular ring. The device further comprises a transparent fixing device, the transparent fixing device is arranged outside the needle head in a sleeving mode, one end of the transparent fixing device is arranged outside the needle cylinder in a sleeving mode, an L-shaped sliding groove is formed in the side wall of the transparent fixing device, the cylindrical clamping column is located in the L-shaped sliding groove, and scales are arranged at the bottom of the L-shaped sliding groove. A spring is arranged in the transparent fixer; the safe vitreous body injection device can assist in fixing eyeballs during vitreous body injection; measuring the distance from the injection point to the limbus corneae; the injection needle point faces the eyeball center; and the depth of the injection needle point entering the eyeball is measured, so that rapid and safe vitreous body injection operation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of vitreous injection, in particular to a safe vitreous injection device. Background Art

[0002] Intravitreal drug injection is a treatment for common chronic fundus diseases such as age-related macular degeneration and diabetic retinopathy. In recent years, the development of intravitreal drug injection has been very rapid, and its application scope has continued to expand. In particular, intravitreal injection of anti-vascular endothelial growth factor (VEGF) agents has become one of the most commonly used treatments in ophthalmology.

[0003] Traditional intravitreal drug injections usually use ordinary syringes, which lack a limiting structure for the eyeball, making injections inconvenient and prone to damage to eye tissues.

[0004] Therefore, it is necessary to design a safe vitreous injection device. Utility Model Content

[0005] The purpose of the present utility model is to provide a safe vitreous injection device to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a safe vitreous injection device, comprising a syringe, a piston and a piston rod for driving the piston, a needle inserted into the head of the syringe, a ring integrally formed at the tail of the needle, and a cylindrical clamping column integrally formed on the outer wall of the ring;

[0007] It also includes a transparent holder, which is sleeved on the outside of the needle, and one end of which is sleeved on the outside of the syringe. The side wall of the transparent holder is provided with an L-shaped sliding groove, the cylindrical clamping column is located inside the L-shaped sliding groove, and the bottom of the L-shaped sliding groove is provided with a scale;

[0008] A spring is provided inside the transparent fixer.

[0009] By adopting the above technical solution: measuring the distance from the injection point to the corneal limbus; ensuring that the injection needle tip is facing the center of the eyeball; and measuring the depth of the injection needle tip entering the eyeball, a fast and safe vitreous injection operation can be achieved.

[0010] Preferably, an integrally formed limiting ring is provided at one end of the transparent fixer away from the ring, one end of the spring abuts against the outer side of the ring, and the other end abuts against the inner side of the limiting ring.

[0011] By adopting the above technical solution, the specific installation position of the spring is limited.

[0012] Preferably, the transparent fixer is integrally formed with an elliptical tube made of transparent soft silicone material at one end close to the limiting ring.

[0013] By adopting the above technical solution: its surface area is large and the surface friction is large, which can help fix the eyeball during eyeball injection and prevent the eyeball from rotating.

[0014] Preferably, the major axis radius of the elliptical tube is 3.5-4.0 mm, and the minor axis radius is 3.0-3.5 mm.

[0015] By adopting the above technical solution: when injecting into a phakic eye, the long axis is tangent to the corneal limbus; when injecting into an aphakic or artificial lens eye, the short axis is tangent to the corneal limbus, the safe injection position can be directly determined.

[0016] Preferably, the scale value of the scale is 6mm-13mm.

[0017] By adopting the above technical solution: the scale corresponds to the depth of the needle tip entering the eyeball during vitreous injection, which makes it convenient for the surgeon to determine the needle insertion depth.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This safe vitreous injection device can assist in fixing the eyeball during vitreous injection; measure the distance from the injection point to the corneal limbus; ensure that the injection needle tip is pointing towards the center of the eyeball; and measure the depth of the injection needle tip entering the eyeball, thereby achieving a fast and safe vitreous injection operation.

[0020] The elliptical tube is made of transparent soft silicone. The long axis radius of the ellipse is 3.5-4.0mm, and the short axis radius is 3.0-3.5mm. When injecting into a phakic eye, the long axis is tangent to the corneal limbus. When injecting into an aphakic or artificial lens eye, the short axis is tangent to the corneal limbus, so that the safe injection position can be directly determined.

[0021] The oval tube is made of transparent soft silicone with a large surface area and high surface friction. It can help fix the eyeball during eye injection and prevent it from rotating.

[0022] The elliptical tube is made of transparent soft silicone. During vitreous injection, placing the transparent fixator on the surface of the eyeball can ensure that the fixator is perpendicular to the surface of the eyeball and the injection needle tip is facing the center of the eyeball to avoid damaging the intraocular tissue.

[0023] The outer wall of the ring is integrally formed with a cylindrical clamping column. When it is placed on the shorter side of the L-shaped slide, the injection needle tip is anchored to the transparent fixture, and the injection needle tube can be installed. When it is placed on the longer side of the L-shaped slide, the injection needle tip and the transparent fixture are released from the anchoring, and vitreous injection can be performed.

[0024] The scale has a value of 6mm-13mm, and the scale corresponds to the depth of the needle tip entering the eyeball during vitreous injection, making it easier for the surgeon to determine the depth of needle insertion.

[0025] The transparent holder has a built-in spring. After the injection is completed, the injection needle tip automatically retracts into the transparent holder to avoid iatrogenic damage and contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of the structure of the safe vitreous injection device of the present invention without the elliptical tube;

[0027] Figure 2 A perspective view of the structure of the safe vitreous injection device of the present invention without the transparent fixator;

[0028] Figure 3 This is a schematic diagram of the structure of the transparent holder of the present invention without the elliptical tube;

[0029] Figure 4 This is a schematic structural diagram of the safe vitreous injection device of the present invention;

[0030] Figure 5 This is a structural perspective view of the safe vitreous injection device of the present invention.

[0031] In the figure: 100, syringe; 110, piston; 111, piston rod; 200, needle; 210, ring; 211, cylindrical clamping column; 300, transparent holder; 310, L-shaped slide; 311, scale; 320, limit ring; 330, spring; 340, elliptical tube. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See Figure 1-Figure 5 A safe vitreous injection device includes a syringe 100, a piston 110 and a piston rod 111 for driving the piston 110, a needle 200 inserted into the head of the syringe 100, a ring 210 integrally formed at the tail of the needle 200, and a cylindrical clamping column 211 integrally formed on the outer wall of the ring 210;

[0034] The transparent holder 300 is also provided with an oval tube 340 made of transparent soft silicone material, which is integrally formed at one end of the transparent holder 300 near the limiting ring 320. The major axis radius of the oval tube 340 is 3.5-4.0 mm, and the minor axis radius is 3.0-3.5 mm. The transparent holder 300 is sleeved on the outside of the needle 200, and one end of the transparent holder 300 is sleeved on the outside of the syringe 100. An L-shaped groove 310 is provided on the side wall of the transparent holder 300, and a cylindrical clamping column 211 is located inside the L-shaped groove 310. A scale 311 is provided at the bottom of the L-shaped groove 310, and the scale 311 has a scale value of 6 mm to 13 mm.

[0035] A spring 330 is provided inside the transparent holder 300 , and an integrally formed limiting ring 320 is provided at one end of the transparent holder 300 away from the ring 210 . One end of the spring 330 abuts against the outside of the ring 210 , and the other end abuts against the inside of the limiting ring 320 .

[0036] Structural principle:

[0037] This safe vitreous injection device can assist in fixing the eyeball during vitreous injection; measure the distance from the injection point to the corneal limbus; ensure that the injection needle tip is pointing towards the center of the eyeball; and measure the depth of the injection needle tip entering the eyeball, thereby achieving a fast and safe vitreous injection operation.

[0038] The elliptical tube 340 is made of transparent soft silicone. The long axis radius of the elliptical tube 340 is 3.5-4.0 mm, and the short axis radius is 3.0-3.5 mm. When injecting into a phakic eye, the long axis is tangent to the corneal limbus. When injecting into an aphakic or artificial lens eye, the short axis is tangent to the corneal limbus, so that a safe injection position can be directly determined.

[0039] The elliptical tube 340 is made of soft silicone material with a large surface area and high surface friction, which can help fix the eyeball during eyeball injection and prevent the eyeball from rotating.

[0040] The elliptical tube 340 is made of transparent soft silicone. When injecting the vitreous body, the transparent fixator 300 is placed on the surface of the eyeball to ensure that the fixator is perpendicular to the surface of the eyeball and the injection needle tip is directed towards the center of the eyeball to avoid damaging the intraocular tissue.

[0041] The outer wall of the ring 210 is integrally formed with a cylindrical clamping column 211. When it is placed on the shorter side of the L-shaped slide 310, the injection needle tip is anchored to the transparent fixture 300, and the injection needle tube can be installed. When it is placed on the longer side of the L-shaped slide 310, the injection needle tip and the transparent fixture 300 are unanchored, and vitreous injection can be performed.

[0042] The scale value of scale 311 is 6mm-13mm, and its scale corresponds to the depth of the needle tip entering the eyeball during vitreous injection, which makes it easier for the surgeon to determine the needle insertion depth.

[0043] The transparent holder 300 has a built-in spring 330. After the injection is completed, the injection needle tip automatically retracts into the transparent holder 300 to avoid iatrogenic damage and contamination.

[0044] Any portion not described in the present invention is the same as the prior art or can be implemented using the prior art. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safe vitreous injection device, comprising a syringe (100), wherein a piston (110) and a piston rod (111) for driving the piston (110) are provided inside the syringe (100), and a needle (200) is inserted into the head of the syringe (100), characterized in that: The tail of the needle (200) is integrally formed with a circular ring (210), and the outer wall of the circular ring (210) is integrally formed with a cylindrical clamping column (211); It also includes a transparent holder (300), the transparent holder (300) is sleeved on the outside of the needle (200), one end of which is sleeved on the outside of the syringe (100), an L-shaped slide groove (310) is provided on the side wall of the transparent holder (300), the cylindrical clamping column (211) is located inside the L-shaped slide groove (310), and a scale (311) is provided on the bottom of the L-shaped slide groove (310); A spring (330) is provided inside the transparent fixer (300).

2. A safe vitreous injection device according to claim 1, characterized in that: An integrally formed limiting ring (320) is provided at one end of the transparent fixer (300) away from the ring (210), and one end of the spring (330) abuts against the outside of the ring (210) and the other end abuts against the inside of the limiting ring (320).

3. A safe vitreous injection device according to claim 1, characterized in that: An elliptical tube (340) made of a transparent soft silicone material is integrally formed at one end of the transparent fixer (300) close to the limiting ring (320).

4. A safe vitreous injection device according to claim 3, characterized in that: The elliptical tube (340) has a major axis radius of 3.5-4.0 mm and a minor axis radius of 3.0-3.5 mm.

5. The safe vitreous injection device according to claim 1, characterized in that: The scale value of the scale (311) is 6 mm to 13 mm.

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