Breathing loop capable of preventing liquid from flowing back

By setting up a stretchable elastic swing component in the breathing circuit, the problem of liquid backflow is solved, the ventilator alarm responds promptly, the patient safety and medical efficiency are improved, and the risk of lung infection is reduced.

CN223323882UActive Publication Date: 2025-09-12ZHONGSHAN HOSPITAL FUDAN UNIV
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Patent Information

Application Number
CN202422670206.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2025-09-12
Estimated Expiration
2034-11-01

AI Technical Summary

Technical Problem

In the existing breathing circuit design, liquids such as humidified water and sputum are prone to backflow, increasing the risk of patients inhaling contaminated air and potentially causing ventilator-associated lung infections. Existing measures cannot completely avoid this problem.

Method used

An extendable elastic swinging assembly is provided at the end of the breathing circuit close to the patient, which includes an elastic sheet and a movable sphere. When the liquid flows back, the sphere is pushed to move axially along the limiting groove tube, causing the elastic sheet to stretch and open to increase the airflow resistance, thereby triggering the ventilator alarm system.

Benefits of technology

It effectively prevents liquid backflow, reduces the risk of patients inhaling contaminated air, reduces the occurrence of ventilator-associated lung infections, improves medical efficiency, reduces the burden on medical staff, and maintains respiratory function.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to a breathing circuit capable of preventing liquid from flowing back, which comprises a pipeline and an accessory, and an extensible elastic swing component is arranged on the inner wall of the pipeline close to a patient; the extensible elastic swing assembly comprises an elastic piece and a movable ball body. One side of the elastic sheet is connected with the inner wall of the pipeline, and the other side of the elastic sheet is connected with the movable ball body; a limiting groove pipe is further arranged in the pipeline, the movable ball is limited in the limiting groove pipe, and the axial direction of the limiting groove pipe is parallel to the axial direction of the pipeline. Compared with the prior art, the extensible elastic swing assembly is arranged at the end, close to a patient, in the pipeline, the extensible elastic swing assembly can automatically adjust airflow resistance when liquid flows back, an alarm system of the breathing machine is triggered, and therefore medical workers are reminded to treat accumulated humidified water or sputum or secretions in time, and the breathing machine is convenient to use. And serious adverse events are avoided.
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