Drainage tube for avoiding penetration or needle stick injury in clinical collection of drainage fluid sample

By designing the visual tube, interface components, positioning components, and protective components of the drainage tube, the problems of unstable docking and insufficient sealing between the drainage tube and the collection tool were solved, enabling convenient sampling and safe operation of the drainage fluid, and ensuring the cleanliness and safety of the sampling process.

CN122075879APending Publication Date: 2026-05-26THE FIRST MEDICAL CENT CHINESE PLA GENERAL HOSPITAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
THE FIRST MEDICAL CENT CHINESE PLA GENERAL HOSPITAL
Filing Date
2026-03-04
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The existing drainage tubes lack an effective limiting structure when docking with the collection tools, which can easily lead to docking misalignment or over-insertion. Furthermore, the docking points are not adequately protected when not collecting samples, resulting in poor sealing and potential leakage and contamination of bodily fluids. It is difficult to balance operational safety with the cleanliness of the collected samples.

Method used

A drainage tube comprising a visual tube, an interface component, a positioning component, and a protective component was designed. The interface component achieves connection upon insertion and sealing upon removal through a sealing ring and a hollow protrusion. The positioning component achieves rapid positioning and fixation through a locking block and a magnetic block. The protective component ensures the safety and cleanliness of the sampling process through a protective cover and a cleaning component.

Benefits of technology

It enables convenient and accurate sampling of drainage fluid, avoids leakage and contamination, ensures operational safety and the purity of sampled specimens, and prevents needle pricks and structural damage.

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Abstract

This invention provides a drainage tube for clinically collected drainage fluid specimens that avoids penetration or needlestick injuries, belonging to the field of medical device technology. The drainage tube includes a tube body with a viewing tube and an interface component. The interface component is used to cooperate with a syringe to sample body fluids. In this design, the drainage fluid directly enters the syringe insertion end through the viewing tube, interface tube, and flow hole, achieving immediate connection upon insertion and convenient sampling of the drainage fluid. The sliding seal design of the sealing ring and hollow protrusion ensures no leakage of drainage fluid during connection, guaranteeing a clean sampling environment and accurate sampling volume. After the syringe is withdrawn, the sealing ring resets under the action of a first spring, re-attaches to the hollow protrusion, and seals the flow hole, achieving immediate sealing upon removal.
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