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Artificial nasolacrimal canal

A nasolacrimal duct and artificial technology, applied in the medical field, can solve problems such as inability to treat lacrimal duct blockage, increase in surgical failure rate, and inability to use guided pull-in surgery, so as to improve safety factor, service life, and indications. Wide, curative effect

Active Publication Date: 2010-08-18
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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  • Artificial nasolacrimal canal
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  • Artificial nasolacrimal canal

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 pipe 1 , a fixed flap 2 , a fixed cap 3 , and a drainage branch pipe 4 .

[0037] Specifically, as figure 1 with figure 2As shown, the drainage main pipe 1 is in the shape of a circular tube, and a positioning hole 1a is opened in its lower part. The position of the positioning hole 1a relative to the drainage branch tube 4 is determined, so only need to determine the positional 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 after introduction, the artificial nasolacrimal duct can be pulled out with a guide wire hook at the positioning hole 1a. Therefore, setting the positioning hole 1a can make the operation more convenient, safe and accurate.

[0038] 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 that of Embodiment 1, the difference is that according to the physiological structure of the nasolacrimal duct of the human body, when the fixed valve 2 is located in the lacrimal sac, the extension line of the upper lacrimal canaliculus is located at the fixed position. Petal 2 and close to the fixed cap 3. Therefore, in order to enable the above-mentioned drainage branch tube 4 to penetrate into the upper lacrimal canaliculus, while the drainage branch tube 4 does not deform the upper lacrimal canaliculus and the position of the drainage branch tube 4 relative to the fixed cap 3 does not change, the drainage branch tube 4 The rear end is fixedly connected on the lower end surface of the fixed 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 occupies a small area,...

Embodiment 3

[0050] Such as Image 6 with Figure 8 As shown, the structure and principle of this embodiment are basically the same as that of Embodiment 1, the difference is that: at one of the gaps between the two fixed flaps 2, there are two tubular drainage branches that can penetrate into the lacrimal canaliculus 4, that is, the first drainage branch pipe 41 and the second drainage branch pipe 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 flap 2 is located in the lacrimal sac, the extension of the lower canaliculus is located at the fixed flap 2 and close to the drainage tube 1, and the upper lacrimal canaliculus The extension of the tubule is located at and close to the fixed flap 2. So in order to make the above-mentioned drainage branch tube 1 41 penetrate into the lower lacrimal canaliculus, the drainage branch tube 2 42 can penetrate into the...

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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 field of medical technology, and relates to the treatment of ophthalmic diseases, in particular to an artificial nasolacrimal duct. Background technique [0002] The nasolacrimal ducts are two ducts that drain tears from the eyes into the nasal cavity. The nasolacrimal ducts include the common nasolacrimal duct and the canaliculus, which in turn includes the upper and lower canaliculus. Epiphora is a common and frequently-occurring disease in ophthalmology, mainly caused by nasolacrimal duct obstruction. At present, dacryocystorhinostomy or lacrimal probing is mainly used for treatment. However, the operation of dacryocystorhinostomy is complicated, the damage is large, the bleeding during the operation is much, the operation time is long, and scars are left on the face after the operation. Sometimes the operation cannot be performed due to surgical contraindications; at the same time, the original anatomical channel of th...

Claims

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Application Information

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IPC IPC(8): A61F2/04
Inventor 王维文
Owner ZHEJIANG HUAFU MEDICAL EQUIP
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