A simple emergency airway obstruction clearing device

By using a bellows and pull rod mechanism to achieve self-testing of sealing and multi-stage negative pressure generation, the problem of insufficient sealing detection and slow negative pressure generation in existing devices is solved, improving the reliability and ease of operation of the emergency device, adapting to different patients and types of obstructions, and protecting airway tissue.

CN121338128BActive Publication Date: 2026-07-03THE FIRST OUTPATIENT DEPARTMENT OF HEBEI PROVINCE DIRECTLY AFFILIATED AGENCIES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE FIRST OUTPATIENT DEPARTMENT OF HEBEI PROVINCE DIRECTLY AFFILIATED AGENCIES
Filing Date
2025-10-16
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing positive pressure exhalation devices suffer from problems such as slow negative pressure generation rate, insufficient sealing detection, lack of multi-stage negative pressure enhancement mechanism, and complex reset operation, resulting in low emergency rescue efficiency and inconvenience of use.

Method used

A simple emergency airway obstruction removal device was designed. It uses a bellows and pull rod mechanism to achieve sealing self-check, automatically triggers multi-stage enhanced negative pressure, forms two-stage enhanced negative pressure suction through a piston structure, and uses a locking structure to ensure safe reset and convenient operation.

Benefits of technology

It improves the reliability and efficiency of emergency response, ensures that each operation is performed on the basis of effective negative pressure, adapts to different patients and types of obstructions, avoids misoperation, protects airway tissue, and enhances the versatility and safety of the device.

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Abstract

This invention discloses a simple emergency airway obstruction clearing device, relating to the technical field of airway drainage. It includes a piston cylinder with a first and second movable chamber. An air supply tube is fixedly connected to the outside of the piston cylinder, communicating with the first movable chamber and a face mask. A piston rod is slidably connected within the first movable chamber, and a sliding frame is slidably connected within the second movable chamber. A rubber ring is fixedly connected to one end of the sliding frame, and a spring is fixedly connected to the other end. This invention, through the design of a bellows and pull rod mechanism, ensures that the negative pressure in the first movable chamber compresses the bellows only when the face mask is tightly fitted to the patient's face, forming an effective seal. This triggers the latch release action, releasing the spring's stored energy. This design avoids ineffective operation due to poor sealing, ensuring that each trigger is based on effective negative pressure, thus improving the reliability of emergency treatment.
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Citation Information

Patent Citations

  • CN112043888A

  • CN115670580A