Dental Suction Valve Assembly With Integrated Backflow Prevention
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Solution Overview
Problem
Existing suction devices in medical and dental applications often fail to prevent cross-contamination between patients due to the presence of bio-films and contaminants in the vacuum lines and valves, which can backflow into new patients.
Innovation Solution
A valve assembly for dental suction systems featuring a rotatable valve plug with a through-passage and a backflow prevention device, which includes a flexible and resilient material to control fluid flow and prevent backflow, even when the valve plug is in the 'OFF' position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a permanent on/off valve is used in the vacuum line, then device complexity is reduced and ease of operation is improved, but cross-contamination between patients occurs due to bio-film accumulation and backflow
Solution Approach 1:
The valve assembly is designed as a disposable component that is replaced between patients. This eliminates cross-contamination by ensuring each patient uses a sterile, unused valve, while maintaining ease of operation through simple replacement procedures. The disposable nature prevents bio-film accumulation and backflow of contaminants.
Solution Approach 2:
The valve assembly is segmented into replaceable components including the valve body, valve plug, and backflow prevention device. This allows the entire valve assembly to be discarded and replaced as a single unit between patients, preventing cross-contamination while maintaining operational simplicity.
2Productivity
If the same vacuum line and valve are reused for multiple patients, then productivity is improved and loss of time is reduced, but contaminants flow by gravity through the system into patients' mouths
Solution Approach 1:
The valve assembly is designed as a disposable component replaced between patients, eliminating contaminant backflow while maintaining productivity. The low cost of the disposable valve allows frequent replacement without impacting workflow or productivity.
Solution Approach 2:
A new sterile valve assembly is installed before each patient treatment, preventing contaminant backflow from the vacuum line. This preliminary action ensures patient safety without significantly impacting productivity due to the simplicity of valve replacement.
3Reliability
If a backflow prevention device is added to the valve assembly, then reliability is improved by preventing cross-contamination, but device complexity increases
Solution Approach 1:
The backflow prevention device is merged with the valve plug and valve body into a single integrated valve assembly. This combination prevents cross-contamination through the backflow prevention mechanism while maintaining simple device replacement procedures, effectively managing complexity through integration rather than separate components.
Solution Approach 2:
The integrated backflow prevention device is part of the disposable valve assembly. This eliminates reliability concerns about complex mechanisms by using a simple, replaceable unit that prevents backflow through its design, avoiding the need for maintenance or cleaning of complex backflow prevention mechanisms.
4Object-affected harmful factors
If the valve assembly is made disposable and replaced between patients, then cross-contamination is eliminated, but loss of time occurs during valve replacement
Solution Approach 1:
The valve plug, backflow prevention device, and valve body are merged into a single pre-assembled unit that can be quickly replaced. This integration eliminates the time required to assemble multiple components, reducing replacement time while maintaining cross-contamination prevention.
Solution Approach 2:
The valve assembly is pre-assembled with all components (valve plug, backflow prevention device, sealing elements) before sterilization and packaging. This preliminary assembly allows for rapid replacement during patient transitions, minimizing loss of time while ensuring complete sterilization and preventing cross-contamination.
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
The valve assembly effectively minimizes the risk of cross-contamination by preventing backflow of contaminants and ensuring a sterile environment for each patient, thereby enhancing patient safety and hygiene.
Implementation Method 1
The backflow prevention device may include a flexible and resilient material, and be movable relative to the valve body to control fluid flow through the fluid flow path independent of operation of the valve plug
Implementation Method 2
The valve plug is rotatable relative to the valve body to selectively alter a flow of fluid along the fluid flow path
Implementation Method 3
The fluid flow path exhibits a varied cross-sectional area along a length of the fluid flow path
Data Source
AI summary
A valve assembly for a dental suction system. The valve assembly includes a valve body having an inlet, an outlet and a fluid flow path extending between the inlet and the outlet. The valve assembly also includes a valve plug positioned at least partially within the valve body and including a through-passage. The valve plug is rotatable relative to the valve body to selectively alter a flow of fluid along the fluid flow path. The fluid flow path exhibits a varied cross-sectional area along a length of the fluid flow path.