Endoscope Gas Feeding Apparatus Pressure Control
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Solution Overview
Problem
Existing gas feeding apparatuses for endoscopes lack precise control over gas flow rates during the initial stages of gas injection into a patient's lumen, leading to potential overshoot and excessive gas distribution, which can cause peristatic motion and complicate treatments by altering the distance between the endoscope and the treatment site.
Innovation Solution
Incorporation of a pressure sensor and control circuit in the gas feeding apparatus to detect the decrease in pressure within the gas feeding bottle and control the gas flow rate, ensuring a stable and predetermined flow rate is maintained by releasing excess gas through a relief valve or adjusting conduit internal pressure using a pressure control valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If gas is injected into the lumen using conventional gas feeding apparatus, then the viewing field and operation region are secured, but gas flow rate overshoot and excessive gas distribution occur during initial injection stages
Solution Approach 1:
The pressure sensor detects pressure changes in the gas feeding bottle before excessive gas injection occurs. The control circuit receives this advance warning and adjusts the gas flow rate preemptively, preventing overshoot before it affects the viewing field stability.
Solution Approach 2:
The pressure sensor continuously monitors the pressure in the gas feeding bottle and feeds this information back to the control circuit. The control circuit adjusts the gas flow rate based on this feedback, creating a closed-loop control system that maintains precise flow rate control and prevents excessive gas distribution.
2Quantity of substance
If gas feeding apparatus operates without pressure monitoring, then the device complexity is reduced, but gas flow rate precision and safety are compromised
Solution Approach 1:
The pressure sensor acts as an intermediary device that provides critical pressure information without requiring direct complex control mechanisms. This simple pressure monitoring component enables precise gas flow rate control through the control circuit, achieving high precision with minimal added complexity.
Solution Approach 2:
The pressure sensor and control circuit work together to automatically regulate gas flow rate without requiring manual intervention. The system self-adjusts the gas flow based on pressure changes, maintaining precision while simplifying operation despite the added components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents overshoot of gas flow rates and excessive gas distribution, stabilizing the viewing field and treatment region, thereby enhancing the precision and safety of endoscopic procedures by maintaining a consistent gas flow rate.
Implementation Method 1
a pressure sensor configured to measure a pressure in a gas feeding bottle provided between the gas feeding apparatus and the gas feeding conduit of the endoscope
Data Source
AI summary
A gas feeding apparatus communicating with a gas feeding source that feeds a predetermined gas and configured to supply the gas to a lumen of a patient through a gas feeding conduit provided in an endoscope includes: a gas feeding bottle provided between the gas feeding apparatus and the gas feeding conduit of the endoscope, and having the gas reserved; and a control circuit configured to detect a timing of start of decrease in a state where a predetermined value is kept, and configured to control a gas feeding amount from the gas feeding bottle to the gas feeding conduit, at the detected timing.