Endoscope Channel Cleaning With Detergent Flushing and Sealed Air-Water Flow

The cleaning system is divided into separate functional modules: a sealing plug module that seals the air inlet, a detergent delivery module that introduces detergent solution, and a flushing module that circulates fluid through the channels. This segmentation allows each module to perform its specific function effectively while maintaining overall system manageability.

A detergent solution acts as an intermediary substance between the cleaning system and the biofilm. The solution is delivered through the water inlet, circulated through the channels, and allows the distal tip to be submerged in it, enabling effective biofilm removal without requiring direct contact between cleaning devices and the channels.

The sealing plug utilizes pneumatic and hydraulic principles by allowing water to flow through internal passages while blocking air. The plug contains a water inlet passage and an air outlet passage that are interconnected, enabling water to be forced through the endoscope channels under pressure while air is sealed off, creating effective fluid flow without requiring the plug to block both inlets simultaneously.

The sealing plug performs multiple functions: it seals the air inlet to prevent air leakage, allows water inlet for detergent solution delivery, provides an air outlet for pressure equalization, and enables simultaneous fluid flow through both air and water outlets. This multi-functionality simplifies the sealing operation while maintaining flushing effectiveness.

The system utilizes the existing water bottle connector and air pump of the endoscope without requiring external complex delivery systems. The detergent solution is delivered through the existing water inlet, and the air pump's natural suction capability is used to draw the solution through the channels, allowing the system to serve itself using its own components.

The fluid path control leverages pneumatic pressure differentials created by the air pump. Air is introduced through the air inlet (sealed by the plug), creating pressure that forces detergent solution through the water inlet and channels. The interconnected passages in the sealing plug allow automatic separation and control of air and water flow paths through pressure-driven mechanisms rather than complex valves.

A flexible bag containing cleaning liquid is used to submerge the distal tip. The bag can be securely attached to the endoscope using elastic bands or clips that wrap around the insertion tube, providing a simple yet effective attachment system that maintains the liquid environment without requiring complex mechanical fixtures.

The distal tip is submerged in the liquid bag before transportation and storage, performing preliminary protection against biofilm development. This preliminary action ensures the tip remains clean and free of biofilm during the vulnerable period between cleaning and next use, without requiring active monitoring or control systems.