CN210644319U - Viscoelastic agent injection device for separating proliferation membrane in retinopathy operation - Google Patents
Viscoelastic agent injection device for separating proliferation membrane in retinopathy operation Download PDFInfo
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- CN210644319U CN210644319U CN201921101860.9U CN201921101860U CN210644319U CN 210644319 U CN210644319 U CN 210644319U CN 201921101860 U CN201921101860 U CN 201921101860U CN 210644319 U CN210644319 U CN 210644319U
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Abstract
The utility model discloses a viscoelastic agent injection device that is arranged in retinopathy operation to proliferate membrane separation, include: a tip portion and a cannula portion; the needle head part sequentially comprises a tailstock, a needle tube, a fine needle and a needle point from bottom to top, the sleeve part comprises an inner sleeve, an outer sleeve and a piston, and the tailstock of the needle head part is sleeved at the head of the inner sleeve. The utility model discloses the thin needle portion external diameter of syringe needle portion is less than needle tubing portion external diameter, can effectively reduce the influence to the operator field of vision and operation, and the needle point design is semi-circular shovel form, is favorable to the operator to stretch into the membrane below, reduces the damage that probably causes the retina. The double-layer sleeve can be adapted to the gas injection device of the existing vitreous body cutting instrument, and the use requirement of the instrument is reduced.
Description
Technical Field
The invention belongs to the field of medical instruments, and particularly relates to a viscoelastic agent injection device for separating a proliferation membrane in a retinopathy operation.
Background
Vitrectomy surgery (PPV) is the primary treatment for Proliferative Vitreoretinopathy (PVR). PVR proliferation membrane is adhered to retina, and the adhesion of fiber blood vessel membrane and retina is usually separated along the retina anterior interface by using a cutting head or microscopic intraocular scissors in the operation. However, for tightly adhering membranes that are complex and not well defined, a small amount of viscoelastic is injected between the proliferative membrane and the retina to better facilitate separation. Currently, a common syringe is usually used to inject the viscoelastic under the proliferation membrane. However, the injection with a general syringe has the following problems: 1. the injection needle point has no radian, so that the retina is easily injured when the injection needle point is inserted into a gap between the proliferation membrane and the retina, and meanwhile, the side edge of the needle point cannot be used for cutting the adhesion tight part; 2. the needle head has too large diameter and is not easy to be inserted into a gap between the proliferation membrane and the retina; 3. it is difficult for the operator to perform the simultaneous operation of insertion and injection with one hand. An operator tries to bend the needle head part of a common syringe and then inject, and the method has the problems that the needle tip is easily damaged when the needle head part is bent, the needle tube is narrow, the injection is difficult and the like.
Therefore, the viscoelastic agent injection device in the operation, which conforms to the physiological structure of the human body and is convenient to operate, is required in the separation and removal of the proliferation membrane in the existing vitreous cutting operation.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an injector for injecting a viscoelastic agent under a proliferation membrane and assisting in separating a fiber proliferation membrane in vitrectomy.
In order to achieve the purpose, the invention adopts the following technical scheme: a viscoelastic injection device for proliferative membrane separation in retinopathy surgery, comprising: a tip portion and a cannula portion;
the needle head part sequentially comprises a tail seat, a needle tube, a fine needle and a needle point from bottom to top, the needle point is in a semicircular shovel shape and inclines to one side, and the included angle α between the needle point and the fine needle is 90-150 degrees;
the sleeve part comprises an inner sleeve, an outer sleeve and a piston, the inner sleeve is sleeved in the outer sleeve, the head of the inner sleeve extends out of the outer sleeve, the piston comprises a plunger at the top, a connecting rod in the middle and a push sheet at the tail, the plunger of the piston can freely slide in the inner sleeve, and the tailstock of the needle head part is sleeved at the head of the inner sleeve.
Furthermore, the front end and two sides of the needle point are provided with side edges.
Furthermore, the length L of the needle tube, the fine needle and the needle tip of the needle head part is 50-60 mm, the outer diameter d1 of the fine needle is 0.19-0.34 mm, the length L1 is 2-3 mm, and the outer diameter d2 of the needle tube is 0.41-0.91 mm.
Further, the outer diameter D1 of the inner-layer sleeve is 5-10 mm, and the capacity V1 is 1 mL; the outer diameter D2 of the outer sleeve is 10-30 mm, and the volume V2 is 10 mL.
Furthermore, the tail part of the outer sleeve is provided with a connecting plate which is centrosymmetric and is in a propeller blade shape.
Furthermore, the diameter of the pushing sheet at the tail part of the piston is smaller than or equal to the outer diameter of the outer-layer sleeve, the length of the piston is smaller than that of the outer-layer sleeve, and the length of the piston is 30-40 mm.
Further, the plug of the piston surrounds the rubber ferrule.
The invention has the beneficial effects that:
(1) the needle point of the injector is in a semicircular shovel shape, the inclination angle of the needle point accords with the physiological radian of human retina, and the retina is not easily damaged when the injector extends into the proliferation membrane and is injected with viscoelastic agent; one-time injection can separate proliferation membrane and retina in large area, and reduce injection frequency.
(2) The outer diameter of the needle head part of the syringe can be conveniently passed into and out of a sleeve in the current vitreoretinal surgery, and the operation is more convenient.
(3) The utility model provides a syringe outer casing afterbody is the connecting plate of the similar screw blade of centrosymmetric, and the rotation of being convenient for is connected on the gas injection device of vitreous body cutting instrument.
(4) The size of the non-key part and the input port of the injector are consistent with those of the prior instruments, and the injector is convenient to connect with the prior equipment and operate by operators.
(5) The utility model provides a syringe shovel form needle point both sides and front end have the side sword, can cut simultaneously and separate the inseparable position of pasting of dull nature separation proliferation membrane and retina in a large tracts of land of once-through injection, reduce surgical instruments's exchange frequency, the security when having improved to shell the membrane.
Drawings
Figure 1 is a schematic view of the structure of a tip segment of an embodiment.
Figure 2 is a front view of the tip segment of the embodiment.
FIG. 3 is a schematic structural view of an outer sleeve of an embodiment.
FIG. 4 is a schematic structural diagram of an inner layer sleeve of the embodiment.
FIG. 5 is a schematic structural view of a piston according to the embodiment.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the above-described drawings, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
A viscoelastic injection device for proliferative membrane separation in retinopathy surgery, comprising: a tip segment and a cannula segment.
the needle head part is shown in figures 1 and 2 and sequentially comprises a tail seat 1, a needle tube 2, a fine needle 3 and a needle point 4 from bottom to top, wherein the needle point is in a semicircular shovel shape and inclines to one side, the included angle α between the needle point and the fine needle is 90-150 degrees, and the front end and the two sides of the needle point are provided with side edges.
The length L of the needle head needle tube, the thin needle and the needle point is 50-60 mm, the outer diameter d1 of the thin needle is 0.19-0.34 mm, the length L1 is 2-3 mm, and the outer diameter d2 of the needle tube is 0.41-0.91 mm.
The sleeve part comprises an outer sleeve 5, an inner sleeve 6 and a piston 7, as shown in figures 3 to 5. The inner layer sleeve is sleeved in the outer layer sleeve, and the head extends out of the outer layer sleeve. The outer diameter D1 of the inner-layer sleeve is 5-10 mm, and the volume V1 is 1 mL; the outer diameter D2 of the outer sleeve is 10-30 mm, and the volume V2 is 10 mL.
The tail part of the outer casing is provided with a connecting plate 8 which is centrosymmetric and is in a propeller blade shape.
The piston comprises a plunger 9 at the top, a connecting rod 10 at the middle and a push plate 11 at the tail. The plunger of the piston surrounds a rubber ferrule 12 and is free to slide within the inner sleeve. The diameter of the piston tail push sheet is smaller than or equal to the outer diameter of the outer sleeve, the length of the piston is smaller than that of the outer sleeve, and the length of the piston is 30-40 mm.
The tail seat of the needle head part is sleeved on the head part of the inner layer sleeve.
Example 1
the outer diameter D1 of the thin needle of the needle head part of the injector is 0.27mm (31G), the inclination angle α of the needle tube is 0.53mm (25G), the needlepoint inclination angle alpha is 130 degrees, the length L1 of the thin needle is 3mm, L is 55mm, the capacity V1 of the inner sleeve is 1ml, the tube diameter D1 is 8mm, the capacity V2 of the outer sleeve is 10ml, the tube diameter D2 is 15mm, the tail part of the outer sleeve is a connecting plate which is centrosymmetric and similar to a propeller blade, the diameter of a piston plunger is 8mm, the diameter of a push plate is 15mm, and the length of the connecting rod is 30 mm.
Example 2
the outer diameter D1 of the thin needle of the needle head part of the injector is 0.22mm (33G), the inclination angle α of the needle tube is 0.53mm (25G), the needlepoint inclination angle alpha is 130 degrees, the length L1 of the thin needle is 4mm, L is 55mm, the capacity V1 of the inner sleeve is 1ml, the tube diameter D1 is 8mm, the capacity V2 of the outer sleeve is 10ml, the tube diameter D2 is 15mm, the tail part of the outer sleeve is a connecting plate which is centrosymmetric and similar to a propeller blade, the diameter of a piston plunger is 8mm, the diameter of a push plate is 15mm, and the length of the connecting rod is 30 mm.
When the viscoelastic agent injection device is used, viscoelastic agent is injected into the inner layer sleeve, the plunger is used for sealing the inner layer sleeve, then the inner layer sleeve is placed into the outer layer sleeve, the plunger tail push sheet is completely immersed into the outer layer sleeve, the tail part of the outer layer sleeve can be fixedly connected with gas injection equipment of a vitreous body cutting instrument for controlling the amount of the injected viscoelastic agent, and the head part of the inner layer sleeve protrudes out of the head part of the outer layer sleeve, so that the needle head part can be connected, and the viscoelastic agent injection device can be used after being screwed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A viscoelastic agent injection device for proliferative membrane separation in retinopathy surgery, comprising: a tip portion and a cannula portion;
the needle head part sequentially comprises a tail seat, a needle tube, a fine needle and a needle point from bottom to top, the needle point is in a semicircular shovel shape and inclines to one side, and the included angle α between the needle point and the fine needle is 90-150 degrees;
the sleeve part comprises an inner sleeve, an outer sleeve and a piston, the inner sleeve is sleeved in the outer sleeve, the head of the inner sleeve extends out of the outer sleeve, the piston comprises a plunger at the top, a connecting rod in the middle and a push sheet at the tail, the plunger of the piston can freely slide in the inner sleeve, and the tailstock of the needle head part is sleeved at the head of the inner sleeve.
2. A viscoelastic agent injection device as set forth in claim 1, wherein: the front end and two sides of the needle point are provided with side edges.
3. A viscoelastic agent injection device as set forth in claim 1, wherein: the length L of the needle head needle tube, the thin needle and the needle point is 50-60 mm, the outer diameter d1 of the thin needle is 0.19-0.34 mm, the length L1 is 2-3 mm, and the outer diameter d2 of the needle tube is 0.41-0.91 mm.
4. A viscoelastic agent injection device as set forth in claim 1, wherein: the outer diameter D1 of the inner-layer sleeve is 5-10 mm, and the volume V1 is 1 mL; the outer diameter D2 of the outer sleeve is 10-30 mm, and the volume V2 is 10 mL.
5. A viscoelastic agent injection device as set forth in claim 1, wherein: the tail part of the outer casing pipe is provided with a connecting plate which is centrosymmetric and is in a propeller blade shape.
6. A viscoelastic agent injection device as set forth in claim 1, wherein: the diameter of the piston tail push sheet is smaller than or equal to the outer diameter of the outer-layer sleeve, the length of the piston is smaller than that of the outer-layer sleeve, and the length of the piston is 30-40 mm.
7. A viscoelastic agent injection device as set forth in claim 1, wherein: the plug of the piston surrounds the rubber ferrule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921101860.9U CN210644319U (en) | 2019-07-15 | 2019-07-15 | Viscoelastic agent injection device for separating proliferation membrane in retinopathy operation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921101860.9U CN210644319U (en) | 2019-07-15 | 2019-07-15 | Viscoelastic agent injection device for separating proliferation membrane in retinopathy operation |
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| CN210644319U true CN210644319U (en) | 2020-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110215338A (en) * | 2019-07-15 | 2019-09-10 | 江苏省人民医院（南京医科大学第一附属医院） | Viscoelastic agent injection device for separating proliferation membrane in retinopathy operation |
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2019
- 2019-07-15 CN CN201921101860.9U patent/CN210644319U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110215338A (en) * | 2019-07-15 | 2019-09-10 | 江苏省人民医院（南京医科大学第一附属医院） | Viscoelastic agent injection device for separating proliferation membrane in retinopathy operation |
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