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Tear duct embolism

A technique for emboli and lacrimal ducts, applied in the field of medical devices, to avoid tissue inflammation, easy to place and remove, and to avoid epiphora

Inactive Publication Date: 2008-02-13
ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the technical problem solved by the present invention is to provide a lacrimal embolus. The present invention designs the embolus into two parts, the embolus body and the fixing part, aiming at achieving better fixing effect On the basis of the formation of suitable lacrimal duct stenosis or blockage, a new balance between maintaining ocular surface moisture and tear discharge can be established, and the above-mentioned problems such as epiphora, infection, and loss can be avoided while minimizing the amount of artificial tears.

Method used

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Experimental program
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Effect test

Embodiment 1

[0030] As shown in Fig. 1 and Fig. 2, a kind of embolus of lacrimal duct comprises embolus body 1, and the afterbody of embolus body 1 is connected with embolus fixing part 2, when fixing in lacrimal duct, embolus fixing part 2 It is in the shape of a helical spring, and the maximum radial dimension of the embolus fixing part 2 matches the diameter of the lacrimal duct of the patient. The outer surface of the embolus body 1 has a smooth transition and is in the shape of a bullet.

[0031] The embolus fixing part 2 described in this embodiment is made of a shape memory alloy (such as a titanium-nickel alloy), and is heat-set into a spiral shape. place. In a specific temperature (40-45°C) environment, rely on its own memory characteristics to restore its own spiral product.

[0032] When in use, topically anesthetize twice, after the lacrimal point dilator expands the lacrimal point, clamp the embolus fixing part 2 with tweezers, insert it into the lacrimal duct according to t...

Embodiment 2

[0036] The embolus fixing part 2 in this embodiment is made of shape memory alloy (such as titanium-nickel alloy). It is different from Example 1 in that it is heat-set into a straight line, and the fixed part 2 is deformed into a spiral shape by mechanical force and stored. After heating (heating to above 45°C), it will restore itself by virtue of its own memory characteristics. Straight line product, easy to take out.

[0037] Lacrimal embolus placement: After two times of topical anesthesia and dilation of the punctum, clamp the fixed part 2 of the embolus with tweezers, insert the body part 1 of the embolus into the lacrimal canaliculus according to the anatomical structure of the lacrimal duct, and continue on the other side While rotating, insert the fixed part 2 of the embolus into the lacrimal canaliculus until the fixed part does not expose the punctum.

[0038]Take out the lacrimal duct embolus: after two times of surface anesthesia, locally heat (for example, to 45...

Embodiment 3

[0040] As shown in FIG. 3 , the embolus fixing part 2 is two elliptical struts 3 movably connected to the tail of the embolus body 1 , and an elastic pressing member 4 (ie, a pressing spring) is connected between the struts 3 . An axial groove 5 is provided on the outer surface of the embolus body 1 , and in this embodiment, the elastic pressing member 4 props each strut 3 outward. At the same time, the axial groove 5 on the outer surface of the embolus body 1 can facilitate the flow of tear fluid and prevent the lacrimal duct 6 from being completely blocked by the embolus.

[0041] Lacrimal embolus placement: After two times of topical anesthesia and dilation of the punctum, clamp the oval supporter 3 of the embolus with tweezers, and insert the body 1 of the embolus into the canal according to the anatomical structure of the lacrimal duct until The support sheet 3 does not reveal teardrops.

[0042] The support piece 3 connected to the tail of the embolus body 1 is due to t...

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Abstract

The present invention belongs to the medical instrument field, which discloses a lacrimal passages embolus comprising an embolus body. The fixing part of the embolus is connected with tail of the embolus body. The largest radial dimension of fixing part of the embolus is larger or equal to that of the embolus body in the lacrimal passages. During application, the fixing part of the embolus is contacted with inner wall of the lacrimal passages. The fixing part of the embolus locates the embolus body. The fixing part of the embolus avoids displacement and abscission of the embolus in the lacrimal passages as far as possible. In addition, size of the embolus body is designed according to tear lacking degree in the patient, therefore lacrimal passages blocking is formed in different degree. Purposes of treatment, improving therapy effect and reducing infection are realized by blocking or restricting the tears into the lacrimal sac. The fixing part of the embolus is elastic, which not only avoids excessive pressing of the lacrimal passages, but also provides more reliable positioning of the embolus body.

Description

technical field [0001] The invention relates to a medical device, in particular to a lacrimal embolus. Background technique [0002] Dry eye is a common and frequently-occurring disease in ophthalmology. It refers to the decrease in the stability of the tear film caused by the quality and quantity of tears or abnormal dynamics caused by any reason, accompanied by eye discomfort, leading to multiple diseases characterized by ocular surface tissue lesions. It is a kind of disease. With the influence of various factors such as environmental conditions and work pressure, the incidence of dry eye is on the rise. At present, there is no effective treatment method and drug for dry eye. Alternative treatment is the main method at present. That is to take artificial tear replacement therapy and hormone eye drops, but replacement therapy requires long-term or even lifelong medication, and artificial tears and their additives can aggravate dry eyes, and the use of hormones has the risk...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F9/007
Inventor 王智崇陈冬李乃洋
Owner ZHONGSHAN OPHTHALMIC CENT SUN YAT SEN UNIV
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