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artificial nasolacrimal duct

A nasolacrimal duct and artificial technology, which is applied in the medical field, can solve the problems of increased surgical failure rate, inability to treat lacrimal canaliculus blockage, inability to use guided pull-in surgery, etc., to improve safety factor, service life, and indications Broad and positive curative effect

Active Publication Date: 2011-11-30
ZHEJIANG HUAFU MEDICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the artificial nasolacrimal duct of this structure has the advantages of less surgical injury and less recurrence after operation, the artificial nasolacrimal duct can only be implanted in the common nasolacrimal duct, that is, it is only suitable for diseases on the common nasolacrimal duct and cannot be used It is used to treat diseases such as lacrimal duct blockage, so there are certain limitations
[0004] The diameter of the head to the bottom of the artificial nasolacrimal duct lumen is equal in size. When the artificial nasolacrimal duct is implanted, it is only suitable for the guided push-in operation, but the guided pull-in operation cannot be used.
Every doctor has his or her own customary surgical methods. If the above methods are not used, the failure rate of the operation may increase. Therefore, the scope of use of the artificial nasolacrimal duct is also affected by the doctor's own customary surgical methods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1 to Figure 4 As shown, the artificial nasolacrimal duct includes a drainage main tube 1, a fixed valve 2, a fixed cap 3, and a drainage branch tube 4.

[0037] Specifically, such as figure 1 with figure 2 As shown, the drainage main pipe 1 has a circular tube shape, and a positioning hole 1a is opened at the lower part thereof. The position of the positioning hole 1a relative to the drainage branch tube 4 is determined. Therefore, it is only necessary to determine the position relationship of the positioning hole 1a relative to the nasal passage during the operation, that is, the drainage branch tube 4 can be accurately introduced into the lacrimal canaliculus. If the artificial nasolacrimal duct fails to reach the designated position accurately after introduction, the guidewire hook can be used to hook the artificial nasolacrimal duct at the positioning hole 1a to pull out the artificial nasolacrimal duct. Therefore, the positioning hole 1a can make the...

Embodiment 2

[0046] Such as Figure 5 with Figure 7 As shown, the structure and principle of this embodiment are basically the same as those of the first embodiment. The difference is that according to the physiological structure of the human nasolacrimal duct, when the fixed flap 2 is located in the lacrimal sac, the extension line of the upper lacrimal canaliculus is located in the fixed 2 petals and 3 close to the fixed cap. Therefore, in order to enable the above-mentioned drainage branch tube 4 to penetrate the upper lacrimal canaliculus, and at the same time, after the drainage branch tube 4 is penetrated, the upper lacrimal canaliculus is not deformed and the position of the drainage branch tube 4 relative to the fixed cap 3 does not change, then the drainage branch tube 4 The rear end is fixedly connected to the lower end surface of the fixing cap 3. The junction of the drainage branch tube 4 and the fixed cap 3 is located at one of the gaps between the two fixed flaps 2, but only ...

Embodiment 3

[0050] Such as Image 6 with Figure 8 As shown, the structure and principle of this embodiment are basically the same as those of the first embodiment. The difference lies in: two tubular drainage branches that can penetrate into the lacrimal canaliculus are provided at one of the gaps between the two fixed flaps 2 4, namely, drainage branch pipe one 41 and drainage branch pipe two 42.

[0051] The lacrimal canaliculus includes the upper canaliculus and the small canaliculus; according to the physiological structure of the human nasolacrimal duct, when the fixed valve 2 is located in the lacrimal sac, the extension line of the lower canaliculus is located at the fixed valve 2 and close to the drainage main pipe 1. The extension of the tubule is located at the fixed valve 2 and close to the fixed valve 2. Therefore, in order to allow the above-mentioned drainage branch tube 41 to penetrate into the lower lacrimal canaliculus, drainage branch tube 2 42 can penetrate into the upper...

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Abstract

The invention provides an artificial nasolacrimal canal, belongs to the technical field of medicine, and solves the problems that canaliculus lacrimalis cannot be lead in the conventional artificial nasolacrimal canal, and implant surgery is single. The artificial nasolacrimal canal comprises a drainage main tube; an upper part of the drainage main tube is provided with a plurality of strip-type fixing flaps which are bent towards into an arc shape and have elasticity; and the fixing flaps are provided with a tubular drainage branch pipe which can penetrate into the canaliculus lacrimalis, and the drainage branch pipe is communicated with the drainage main tube. When the artificial nasolacrimal canal is used for curing a disease of the nasolacrimal canal and a lacrimal sac, the problem that the disease cannot be cured because of canaliculus lacrimalis blockage is solved; the artificial nasolacrimal canal has the advantages of simple, convenient and safe operation of the implant surgery, diversity of available operation modes, wide indication and obvious curative effect; and the artificial nasolacrimal canal has an integrated structure so as to improve soundness and increase safety factor and prolong service life.

Description

Technical field [0001] The invention belongs to the medical technology field, and relates to the treatment of ophthalmic diseases, in particular to an artificial nasolacrimal tube. Background technique [0002] Nasolacrimal ducts are two ducts through which tears drain from the eyes into the nasal cavity. The nasolacrimal duct includes the common nasolacrimal duct and the canaliculus, and the canaliculus includes the upper and lower canaliculus. Epilepsy is a common and frequently-occurring disease in ophthalmology, mainly caused by obstruction of the nasolacrimal duct. Currently, dacryocystorhinostomy or lacrimal passage probing is mainly used for treatment. However, the operation of dacryocystorhinostomy is more complicated, the damage is large, the intraoperative bleeding is much, the operation time is long, there are scars behind the operation, and sometimes the operation cannot be performed due to the contraindications of the operation; at the same time, the operation chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/04
Inventor 王维文
Owner ZHEJIANG HUAFU MEDICAL EQUIP
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