Suction Device Rotary Switch Oxygen Wastage Prevention
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Solution Overview
Problem
Conventional suction devices for patients lack a switch, leading to oxygen being drawn out during sputum suction, resulting in patient discomfort and oxygen wastage, and sputum adhering to the outer surface of the suction tube, posing an infection risk for medical personnel.
Innovation Solution
A suction device equipped with a rotary switch that aligns suction holes with the patient-end and suction connectors during sputum suction to prevent oxygen from being drawn in and includes a sputum-wiping piece to remove adhered sputum from the outer surface when the switch is in the first position, and blocks oxygen entry during cleaning by positioning the suction holes out of alignment in the second position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the suction device operates without a rotary switch, then the structure remains simple, but oxygen is drawn out during sputum suction causing patient discomfort and oxygen wastage
Solution Approach 1:
The patent introduces a rotary switch that can rotate between different positions to dynamically control the alignment of suction holes with connectors. This dynamic mechanism allows the device to switch between suction mode (holes aligned) and oxygen supply mode (holes misaligned), preventing oxygen wastage while maintaining operational simplicity through a single rotating component
Solution Approach 2:
The rotary switch acts as an intermediary mechanism between the suction holes and the connectors. By rotating the switch, the alignment relationship between suction holes and connectors is controlled, thereby mediating the flow path to prevent oxygen from being drawn into the suction connector during oxygen supply
2Device complexity
If the suction device operates without a rotary switch, then the device structure remains simple, but sputum adheres to the outer surface of the suction tube posing infection risk
Solution Approach 1:
The rotary switch provides a dynamic solution where rotating to different positions controls both the suction function and the sputum wiping function. In the first position, suction holes align for sputum removal; in the second position, they misalign to prevent oxygen wastage. This single dynamic component addresses both safety concerns without adding complex separate mechanisms
Solution Approach 2:
The rotary switch serves multiple functions: it controls the alignment of suction holes for both suction operation and oxygen supply protection, and it positions the sputum-wiping piece for both sputum removal and outer surface wiping. This multi-functional design prevents infection risks while avoiding device complexity through consolidation
3Ease of operation
If the suction holes are sized to allow suction tube insertion, then sputum suction function is achieved, but oxygen can be drawn into the suction connector
Solution Approach 1:
The rotary switch creates a dynamic alignment system where the suction holes are positioned to align with both the patient-end connector and suction connector only in the suction position. When rotated to the oxygen supply position, the holes misalign with the suction connector, preventing oxygen drawout while maintaining the same hole size that enables effective sputum suction
Solution Approach 2:
The rotary switch acts as an intermediary that controls the communication path between suction holes and connectors. By rotating the switch, it mediates whether oxygen can reach the suction connector through the suction holes, thereby preventing oxygen wastage without affecting the suction function when properly aligned
Data Source
AI summary
A suction device having a rotary switch is provided. A main body of the suction device is provided with a patient-end connector, an oxygen supply connector, a suction connector, a cleaning connector and a connecting portion. The rotary switch is assembled with the connecting portion and can be switched between a first position and a second position. The rotary switch is provided with two opposite suction holes. When the rotary switch is located in the first position, the two suction holes are aligned with the patient-end connector and the suction connector to thereby communicate the patient-end connector with the suction connector. When the rotary switch is located in the second position, the communication between the patient-end connector and the suction connector is shut off.