Lacrimal passage cannula
阅读说明：本技术 一种泪道插管 (Lacrimal passage cannula ) 是由 蒋正轩 于 2020-08-20 设计创作，主要内容包括：本发明适用于医疗设备技术领域,提供了一种泪道插管,所述泪道插管包括：骨架,用于塑型引流；缓释层,以溶胀方式与骨架结合固定,内部容纳药物,用于进入泪道并进行缓释药物治疗。缓释层在泪道内部吸收水分后并进行缓释药物,对泪道进行治疗,通过缓释层的缓释作用,药物缓慢释放,可以持续进行治疗,提高了治疗的效果,药物缓慢释放,避免了药效过大造成泪道损伤,提高了药物治疗的安全性。(The invention is applicable to the technical field of medical equipment, and provides a lacrimal duct cannula, which comprises: the framework is used for molding drainage; and the sustained-release layer is combined and fixed with the framework in a swelling mode, contains the medicine inside and is used for entering the lacrimal passage and performing sustained-release medicine treatment. The slow release layer can slowly release the medicine after absorbing water in the lacrimal passage to treat the lacrimal passage, the medicine is slowly released through the slow release effect of the slow release layer, the treatment can be continuously carried out, the treatment effect is improved, the medicine is slowly released, the lacrimal passage damage caused by overlarge medicine effect is avoided, and the safety of the medicine treatment is improved.)
1. A lacrimal cannula, comprising:
the framework is used for molding drainage;
and the sustained-release layer is combined and fixed with the framework in a swelling mode, contains the medicine inside and is used for entering the lacrimal passage and performing sustained-release medicine treatment.
2. The lacrimal cannula of claim 1, wherein the frame is a hollow tubular structure.
3. The lacrimal cannula of claim 1, wherein the frame is made of silicone.
4. The lacrimal cannula of claim 1, wherein the slow release layer is made of a hydrogel material.
5. The lacrimal cannula of claim 4, wherein the hydrogel is made of sodium alginate.
6. The lacrimal cannula of claim 1, wherein the length of the frame is 150-250 mm.
7. The lacrimal cannula of claim 6, wherein the length of the skeleton is 200 mm.
8. The lacrimal cannula of claim 1, wherein the outer diameter of the frame is 0.3-1.2 mm.
9. The lacrimal cannula according to any of claims 1-8, wherein the insertion end of the frame is provided with an expansion member for expanding the lacrimal passage, the expansion member being a non-sealing structure and communicating with the frame to form a drainage channel.
10. The lacrimal cannula of claim 9, wherein the augment is one of a hollow ring structure, a hammer structure, or an ellipsoid structure.
Technical Field
The invention belongs to the technical field of medical equipment, and particularly relates to a lacrimal duct cannula.
Background
The lacrimal duct obstruction is a common disease and frequently encountered disease in ophthalmology, the prior artificial lacrimal duct is commonly used for treating, two kinds of artificial lacrimal ducts which are used at home and abroad at present are mainly used, one is a thick duct which is specially used for treating the obstruction of the nasolacrimal duct, the other is a thin duct which is specially used for treating the obstruction of the lacrimal duct, and the related reports of complications in the treatment process of the lacrimal duct catheterization in recent years show that the fibrin adhesion obstruction in the lacrimal duct caused by infection and chronic inflammation due to the long-time arrangement of material pipes such as silica gel and the like, even the adhesion of the lacrimal duct is caused by the formation of fixed scars, the blockage of the lacrimal duct of a serious patient occurs, surrounding tissues and organs are stimulated, the original disease is not well recovered, the persistence is not achieved, and the life quality of the patient is seriously affected.
Disclosure of Invention
The embodiment of the invention aims to provide a lacrimal duct cannula, aiming at solving the problems of susceptibility and chronic inflammation.
Embodiments of the present invention are achieved by a lacrimal cannula, comprising:
the framework is used for molding drainage;
and the sustained-release layer is combined and fixed with the framework in a swelling mode, contains the medicine inside and is used for entering the lacrimal passage and performing sustained-release medicine treatment.
In the embodiment of the invention, when the lacrimal passage intubation is used, firstly, the lacrimal passage is fully expanded, the lacrimal canaliculus and the narrow part of the nasolacrimal duct are probed by using a lacrimal passage probe, the lacrimal passage is washed, the medicine-carrying lacrimal passage intubation is taken out for standby, the inserted steel wire core is matched with the lacrimal passage intubation and inserted into the lacrimal passage, the metal wire core is fed according to the probing method, the lacrimal passage intubation is inserted, the catheter can be knotted or fixed, the sustained-release layer absorbs water in the lacrimal passage and carries out sustained-release medicine to treat the lacrimal passage, and the medicine is slowly released through the sustained-release effect of the sustained-release layer, so that the treatment effect is improved, the medicine is slowly released, the lacrimal passage injury caused by overlarge medicine effect is avoided, the safety of the medicine treatment is improved, the sustained-release layer has hydrophilic performance after water absorption, and the use comfort level of the lacrimal passage intubation is improved.
As a preferred embodiment of the invention, the skeleton is of a hollow tubular structure, so that the sustained-release layer can be supported, the supporting area is increased, the supporting strength is increased, meanwhile, the contact area of the sustained-release layer and the lacrimal duct is increased, and the use discomfort caused by scratching is avoided.
As a preferred embodiment of the invention, the framework is made of silica gel, so that the framework has enough supporting capacity, corresponding flexibility, no toxicity, no smell and stable chemical property.
As a preferred embodiment of the invention, the slow release layer is made of hydrogel materials and is provided with a part of hydrophobic groups and hydrophilic residues, and the hydrophilic residues are combined with water molecules to form a high-molecular network system which is soft in property, can keep a certain shape and can absorb a large amount of water.
As a preferred embodiment of the invention, the hydrogel is made of sodium alginate, the sodium alginate has strong hydrophilicity, can be slowly dissolved in the lacrimal passage for drug slow release to form a very viscous uniform solution, and has the characteristics of softness, uniformity and the like; the pH value is 7, the product is neutral and can be adjusted to be high in safety; can be made into tough fiber or film with anti-cracking effect; small adhesion, high flexibility, easy molding, low cost and easy acquisition.
As a preferred embodiment of the invention, the length of the framework is 150-250mm, so that the framework can be suitable for various people.
As a preferred embodiment of the present invention, the length of the skeleton is 200mm, thereby facilitating sufficient insertion into the lacrimal passage and treatment and fixation.
As another preferred embodiment of the invention, the outer diameter of the skeleton is about 0.3-1.2mm, and the main indication is blockage near the lacrimal canaliculus, which is convenient for inserting a lacrimal duct cannula into the lacrimal duct, and is convenient for dredging the lacrimal duct and fully expanding the lacrimal duct.
As another preferred embodiment of the invention, the insertion end of the framework is provided with an expansion piece for expanding the lacrimal passage, and the expansion piece is of a non-sealing structure and is communicated with the framework to form a drainage channel; the expansion piece is inserted into the inner part of the lacrimal passage, so that the lacrimal passage can be conveniently expanded, and the insertion tube can conveniently enter.
As another preferred embodiment of the invention, the extension piece can be one of a hollow annular-structure annular head, a hammer-shaped structure or an ellipsoidal-structure capsule head, so that the extension piece is attached to the lacrimal sac part to the maximum extent, and the molding effect is greatly improved.
As another preferred embodiment of the invention, when the expansion piece is in a hammer-shaped structure, the length of the head part is about 5-6 mm; the length of the body part is about 50mm, and the width of the head part is 4-7 mm; the body width is about 0.5-5 mm. The body width is 0.5-1mm, and is suitable for children, and the body width is about 4, and is suitable for adults.
According to the lacrimal duct cannula provided by the embodiment of the invention, the slow release layer absorbs water in the lacrimal duct and slowly releases the medicine to treat the lacrimal duct, the medicine is slowly released through the slow release effect of the slow release layer, the treatment can be continuously carried out, the treatment effect is improved, the medicine is slowly released, the lacrimal duct damage caused by overlarge medicine effect is avoided, and the safety of the medicine quality is improved. According to the disease of the patient, the concentration and the release time of the medicine are regulated and controlled, the targeted treatment can be carried out, the medicine damage is avoided, and the treatment effect is improved. The expansion piece has a certain matching degree in anatomical shape, has certain rigidity and plasticity, can remold and keep smooth to the maximum extent, and cannot damage the original physiological pipeline structure.
Drawings
Fig. 1 is a schematic structural view of a lacrimal cannula according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a lacrimal cannula with an annular head according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a lacrimal cannula with a capsule-shaped head according to an embodiment of the present invention;
in the drawings: the slow-release capsule comprises a framework 1, a slow-
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
As shown in fig. 1, a structural diagram of a lacrimal cannula provided in an embodiment of the present invention includes:
the framework 1 is used for molding drainage;
and the sustained-
In the embodiment of the invention, when in use, firstly, the lacrimal punctum is fully expanded, the lacrimal canaliculus and the narrow part of the nasolacrimal duct are probed by using a lacrimal probe, the lacrimal duct is washed, the medicine-carrying lacrimal duct cannula is taken out for standby, the inserted steel wire core is matched with the lacrimal duct cannula to be inserted into the lacrimal duct, the inserted steel wire core is fed according to the probing method, the metal wire core is drawn out, the lacrimal duct cannula is inserted, and then the catheter can be knotted or fixed, the sustained-
In one embodiment of the present invention, the matrix 1 has a supporting function, so as to ensure the formation of the sustained-
As a preferred embodiment of the invention, the framework 1 is a hollow tubular structure, so that the sustained-
As a preferred embodiment of the invention, the
As a preferred embodiment of the invention, the hydrogel is made of sodium alginate, the sodium alginate has strong hydrophilicity, can be slowly dissolved in the lacrimal passage for drug slow release to form a very viscous uniform solution, and has the characteristics of softness, uniformity and the like; the pH value is 7, the product is neutral and can be adjusted to be high in safety; can be made into tough fiber or film with anti-cracking effect; small adhesion, high flexibility, easy molding, low cost and easy acquisition.
As a preferred embodiment of the present invention, the length of the frame 1 is 150-250mm, so that the frame can be suitable for various people.
As a preferred embodiment of the present invention, the length of the frame 1 is 200mm, thereby facilitating sufficient insertion into the lacrimal passage and treatment and fixation.
As another preferred embodiment of the invention, the outer diameter of the framework 1 is about 0.3-1.2mm, and the main indication is blockage near the lacrimal canaliculus, which is convenient for inserting a lacrimal duct cannula into the lacrimal duct, and is convenient for dredging the lacrimal duct and fully expanding the lacrimal duct.
As shown in fig. 2-3, as another preferred embodiment of the present invention, an expansion piece for expanding lacrimal passage is provided at the insertion end of the skeleton 1, the expansion piece is a non-sealing structure and is communicated with the skeleton 1 to form a drainage channel; the expansion piece is inserted into the inner part of the lacrimal passage, so that the lacrimal passage can be conveniently expanded, and the insertion tube can conveniently enter.
As another preferred embodiment of the invention, the extension piece can be one of a hollow annular-structure
As another preferred embodiment of the invention, when the expansion piece is in a hammer-shaped structure, the length of the head part is about 5-6 mm; the length of the body part is about 50mm, and the width of the head part is 4-7 mm; the body width is about 0.5-5 mm. The body width is 0.5-1mm, and is suitable for children, and the body width is about 4, and is suitable for adults.
The lacrimal duct cannula is inserted into the lacrimal duct, the
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种防雾气护目镜