Airway Adaptor With Obstructable Nasal Cannula for Endoscopy
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Solution Overview
Problem
Conventional airway adaptors with two nasal cannulas inserted into nostrils hinder transnasal endoscopic surgical procedures, as one cannula impedes the insertion of surgical tools, making it difficult to perform simultaneous oxygen inhalation and respiratory monitoring.
Innovation Solution
An airway adaptor and nasal cannula design that includes a nasal expiration collecting portion, a gas passage, and a gas sensor attaching portion, allowing for a flowing state and an obstruction state, enabling flexible adaptation during procedures by allowing one nostril cannula to be obstructed when necessary, thus preventing interference with surgical tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two nasal cannulas are disposed in accordance with the two nostrils for oxygen inhalation and respiratory monitoring, then the respiratory condition can be monitored and oxygen can be supplied, but the nasal cannula on the side of the nostril into which the tool is to be inserted impedes the implementation of the technique
Solution Approach 1:
The airway adaptor is divided into separate functional modules: a first nasal cannula for oxygen supply, a second nasal cannula for respiratory monitoring, and a removable cover for the second cannula. This segmentation allows independent control of each function, enabling the monitoring cannula to be covered or removed when transnasal endoscopic procedures are performed, while the oxygen supply cannula remains functional.
Solution Approach 2:
The second nasal cannula (monitoring cannula) can be completely removed from the airway adaptor when not needed, or its opening can be covered with a removable cover. This extraction approach eliminates the interference with surgical tools while preserving the oxygen supply function through the first cannula and enabling monitoring when the cover is removed.
2Adaptability or versatility
If the nasal cannula is made obstructable to allow tool insertion, then the adaptability to various techniques is improved, but the gas passage must be designed to allow both flowing and obstruction states
Solution Approach 1:
The gas passage system is segmented into separate cannulas (first and second nasal cannulas) with independent control mechanisms. Each cannula can be independently covered or removed, allowing flexible adaptation to different procedural needs without requiring complex integrated control mechanisms.
Solution Approach 2:
A removable cover is introduced as an intermediary element between the second nasal cannula and the external environment. This simple cover mechanism enables the transition between flowing and obstruction states without modifying the internal gas passage structure, maintaining simplicity while achieving the required functionality.
Data Source
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AI summary
An airway adaptor includes: a nasal expiration collecting portion which is to be connected to a nostril of a living body, and which collects an expiration of the nasal cavity; a gas passage portion that forms a gas passage through which the expiration collected by the nasal expiration collecting portion passes; and a gas sensor attaching portion to which a gas sensor that is disposed in the gas passage portion, and that measures the concentration of a predetermined gas component contained in the expiration is attachable. The nasal expiration collecting portion shows a flowing state where a flow of the expiration is allowed, and an obstruction state where the flow of the expiration is blocked.