Endoscope Pipe Line State Determination Using Pressure Decay Rate
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Solution Overview
Problem
Existing methods for determining the open or blocked state of an endoscope pipe line during washing and disinfection are prone to errors due to variations in pressure or flow rate measurements, which can be influenced by factors such as waveform changes, measurement device variations, pipe turbulence, and noise, leading to potential erroneous determinations.
Innovation Solution
A state determination method that involves supplying a pressurized fluid into the endoscope pipe line, acquiring the change rate of a physical quantity such as pressure or flow rate after fluid supply is stopped, and using this change rate to accurately determine the pipe line state by converting it into a constant through logarithmic conversion and linear approximation, while excluding outliers and determining the degree of variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure or flow rate measurement is used to determine pipe line state, then the determination can be performed, but measurement variations due to waveform changes, turbulence, and noise cause erroneous determinations
Solution Approach 1:
The patent applies preliminary action by performing a flushing operation before the determination operation to remove residual washing solution and disinfectant from the pipe line. This preliminary flushing ensures that the subsequent pressure or flow rate measurement reflects the true pipe line state without contamination from previous operations, thereby preventing erroneous determinations.
Solution Approach 2:
The patent implements feedback by continuously monitoring the pressure or flow rate during the determination operation and comparing it against predetermined thresholds. The system adjusts its determination based on the measured values, using the feedback loop to accurately identify whether the pipe line is open or blocked while accounting for measurement variations.
2Reliability
If washing solution and disinfectant solution are supplied into the pipe line, then washing and disinfection are performed, but blockage prevents sufficient treatment
Solution Approach 1:
The patent applies preliminary action by performing a flushing operation before the determination operation to remove residual washing solution and disinfectant from the pipe line. This preliminary flushing ensures that the subsequent pressure or flow rate measurement reflects the true pipe line state without contamination from previous operations, thereby preventing erroneous determinations.
Solution Approach 2:
The patent implements feedback by continuously monitoring the pressure or flow rate during the determination operation and comparing it against predetermined thresholds. The system adjusts its determination based on the measured values, using the feedback loop to accurately identify whether the pipe line is open or blocked while accounting for measurement variations.
Data Source
AI summary
Provided are a state determination method for an endoscope pipe line, a state determination device for an endoscope pipe line, and an endoscope washing and disinfection device with which it is possible to determine whether an endoscope pipe line is in an open or blocked state with high accuracy. A state determination method for an endoscope pipe line includes a supply step of supplying a pressurized fluid into an endoscope pipe line, a change rate acquisition step of acquiring a change rate of a physical quantity of the fluid within a determination period after the supply of the fluid is stopped, and a determination step of determining whether the endoscope pipe line is in an open or blocked state based on the change rate acquired in the change rate acquisition step.