Nasolacrimal duct tube used for lacrimal duct reformation operation

Abstract

A nasolacrimal stent device illuminates a dark nasal cavity so that the interior of the nasal cavity can be directly observed to facilitate and ensure the correct insertion of a nasolacrimal stent into the nasal duct. Flexible, transparent probe tube segments (21) are connected to the opposite ends of a flexible detention tube segment (2) having a diameter that permits the flexible detention tube segment (2) to be inserted in a lacrimal passage, respectively. The respective extremities of distal end parts (21a, 21b) of the probe tube segments (21) are closed. The probe tube segments (21) are provided in their base end parts with openings (23), respectively. When inserting each probe tube segment (21) into the nasal cavity, an illuminating device, such as an optical fiber (30) is inserted through the opening (23) into the probe tube segment (21) to illuminate the interior of the nasal cavity through the transparent probe tube segment (21). The probe tube segment (21) can be surely caught with a hook and can be pulled out from the nasal cavity. An ultrasonic probe or an endoscope may be used instead of the illuminating device to find the position of the nasolacrimal stent in the nasal cavity.

Description

technical field [0001] The invention relates to a nasolacrimal duct hose for lacrimal puncta, lacrimal hall, lacrimal sac and nasolacrimal duct reconstruction for the treatment of lachrymia. Background technique [0002] human eyes and nose Figure 15 In the structure shown, the inside of the eye E communicates with the upper lacrimal hall 2a and the lower lacrimal hall 2b through the upper and lower lacrimal punctum 1a and the lower lacrimal punctum 1b through small holes opening up and down on the nasal side. In addition, the upper lacrimal hall 2 a and the lower lacrimal hall 2 b are connected to the lacrimal sac 4 via the lacrimal hall 3 . The lacrimal sac 4 communicates with the nasolacrimal duct 5 extending downward, and the lower end of the nasolacrimal duct 5 ends at the lower nasal meatus 6 . 7 is the middle meatus, 8 is the middle nasal bone. [0003] A device with a silicone tube is known as a nasolacrimal duct tube used for reconstruction of the lacrimal duct i...

AI Technical Summary

Problems solved by technology

[0005] However, when performing the insertion of the instrument with a silicone hose as described above, especially the lacrimal sac 4 and the nasolacrimal duct 5 are very dark, so the operation in the nasal cavity has to be carried out in a state of groping by hand, which deviates from what should be done originally. Its unobstructed path often produces false passages in the tissue, which injures the nasal mucosa and causes massive bleeding, making it extremely difficult to operate

In order to avoid this situation, some people try to operate while observing with an endoscope, and use a shadowless lamp to illuminate. However, it is not easy to perform a physical operation in the hands while observing a monitor with an endoscope. , but it is difficult to directly see the inside of the nasal cavity when using a shadowless lamp, and satisfactory results cannot be obtained

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