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Completely-degradable net-shaped nasolacrimal stent and implantation system thereof

A completely degradable, nasolacrimal duct technology, applied in the field of medical devices, can solve the problems of increased patient pain and easy damage to the nasolacrimal duct endometrium when taking out the nasolacrimal duct stent, so as to avoid damage, avoid secondary surgery, and reduce pain Effect

Inactive Publication Date: 2015-03-11
PUYI (SHANGHAI) BIOTECHNOLOGY CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the implantation of the nasolacrimal duct stent in the prior art is easy to damage the nasolacrimal duct intima, and the removal of the nasolacrimal duct stent increases the pain of the patient, the present invention aims to provide a fully degradable mesh Nasolacrimal duct stent and its implantation system

Method used

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  • Completely-degradable net-shaped nasolacrimal stent and implantation system thereof
  • Completely-degradable net-shaped nasolacrimal stent and implantation system thereof
  • Completely-degradable net-shaped nasolacrimal stent and implantation system thereof

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Embodiment Construction

[0031] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0032] According to the nasolacrimal duct stent of the implant system of the present invention is a sleeve-shaped support, for convenience of description, figure 1 The plane development view of the nasolacrimal duct stent is given. The nasolacrimal duct stent 1 includes a mesh body 11 with pores formed by biodegradable polymer materials, for example, a mesh-like structure can be formed by laser engraving on extruded tubing made of biodegradable polymer materials. The mesh body 11 includes a support ring 111 and a connecting rod 112, wherein the support ring 111 is a closed sinusoidal support ring extending in the circumferential direction, and each support ring is formed by connecting repeated V-shaped units 111a end-to-end. The connecting rods 112 are disposed between adjacent supporting rings 111 . The supporting rings 111 mainly support the bl...

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Abstract

The invention relates to a completely-degradable net-shaped nasolacrimal stent. The completely-degradable net-shaped nasolacrimal stent comprises a sleeve-shaped net-shaped body made of biodegradable high polymer materials and provided with holes; a medicine coating is arranged on the surface of the net-shaped body; the net-shaped body is composed of a first net-shaped body part and a second net-shaped body part which are connected; in the compression state, the first net-shaped body part and the second net-shaped body part are the same in diameter; and in the expansion state, the diameter of the first net-shaped body part is larger than the diameter of the second net-shaped body part. After lumen rebuilding is completed, water and carbon dioxide are finally generated by the completely-degradable net-shaped nasolacrimal stent to be discharged through the nasal cavity; and second operations and pains of a patient are avoided. The nasolacrimal stent is suitable for approaching the body from the nasal cavity, so that injuries, caused by the fact that the nasolacrimal stent approaches the body from the positions above the eyes, to the lacrimal ductile and the nasolacrimal canal inner membrane are avoided. By means of the completely-degradable net-shaped nasolacrimal stent, the medicine slow release effect is achieved through the medicine coating; and continuous treatment on the nasolacrimal canal for a long time is accordingly achieved.

Description

technical field [0001] The invention relates to a medical device for eye diseases, more particularly to a completely degradable mesh nasolacrimal duct stent and its implantation system. Background technique [0002] Nasolacrimal duct obstruction and chronic dacryocystitis are common eye diseases. The current treatment methods mainly include lacrimal duct probing and nasal dacryocystorostomy. Lacrimal duct probing is less invasive and easy to operate, but it requires repeated probing, which increases the pain of the patient, and has a high recurrence rate and poor therapeutic effect. Dacryocystorhinostomy is a classic surgical method. The purpose is to directly anastomose the lacrimal sac with the nasal mucosa, so that secretions and tears can directly enter the middle nasal passage from the lacrimal sac, so as to eliminate the purulent lesions of the lacrimal sac and relieve epiphora. This surgical method is the most effective method for the treatment of nasolacrimal duct o...

Claims

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Application Information

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IPC IPC(8): A61F2/90A61M31/00A61F2/95
Inventor 黄彬谢建李建军
Owner PUYI (SHANGHAI) BIOTECHNOLOGY CO LTD
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