Lacrimal probe

By introducing a directional mechanism and synchronous motion design into the lacrimal duct probe, the problems of damage and failure during retrograde catheterization of existing lacrimal duct probes have been solved, achieving a safer and smoother catheterization operation.

CN122272284APending Publication Date: 2026-06-26GUANGZHOU T K MEDICAL INSTR
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU T K MEDICAL INSTR
Filing Date
2024-12-24
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing lacrimal duct probes are prone to damage, are difficult to operate, and are prone to failure during retrograde catheter placement. The guide wire is easily tangled and its direction is uncertain, making catheter placement difficult.

Method used

A lacrimal duct probe with a directional mechanism was designed. By synchronously moving the sheath and the guide wire, the direction of the guide wire traction part is fixed. Combined with the elastic material of the sheath and the marking mechanism, the guide wire is stably guided and moves synchronously, reducing the risk of damage and failure.

Benefits of technology

It improves the safety and success rate of retrograde catheter placement, reduces guide wire twisting and hysteresis, and ensures a smooth catheter placement process.

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Abstract

This invention relates to a lacrimal duct probe comprising a sheath, a guide head, a guide wire, and a directional mechanism. The sheath contains a working channel, the guide head is located at the front end of the sheath, and the guide wire is disposed within the working channel. The guide wire, after being bent, forms a traction section at the bend, which is located on the distal outer side of the working channel. The guide wire extends along the working channel, with its proximal end protruding from the proximal end of the working channel. The directional mechanism fixes the direction of the traction section of the guide wire. During retraction, a locking mechanism locks the guide wire and sheath, allowing for complete retraction. The directional mechanism ensures that the direction of the traction section is well fixed, allowing it to be smoothly exposed outside the anterior nasal cavity along the nasal cavity direction. The complete retraction process effectively prevents guide wire lag, better ensuring the safety and success of the placement process and better meeting the clinical operational needs during placement.
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