Spring-Loaded Valve Urine Backflow Prevention Device
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current catheter systems face challenges in preventing urine backflow, which can lead to urinary tract infections (UTIs) and increased patient discomfort, due to the lack of effective barriers against backflow.
Innovation Solution
A urine backflow prevention device integrated into catheter tubes, featuring a spring-loaded valve mechanism that opens in response to urine pressure and closes immediately after flow ceases, preventing backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded valve mechanism is integrated into the catheter tube, then urine backflow prevention is improved, but device complexity increases
Solution Approach 1:
The valve mechanism is nested within the catheter tube structure, with the valve member positioned inside the tube lumen and the spring housed within a compact chamber formed by the catheter wall. This nesting approach integrates the backflow prevention function without requiring separate external components, thereby improving reliability while minimizing the increase in device complexity.
Solution Approach 2:
The spring-loaded valve operates autonomously by utilizing the pressure differential created during urine flow. When urine flows in the forward direction, the pressure opens the valve automatically; when flow stops or reverses, the spring automatically closes the valve without requiring external control mechanisms. This self-service operation enhances backflow prevention reliability while keeping the device structure relatively simple.
2Ease of operation
If the valve is made pressure-sensitive to open during urine flow, then ease of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The valve is designed to respond to changes in pressure parameters during urine flow. The spring constant and valve opening pressure are carefully selected to match the physiological pressure range of urine flow, allowing the valve to open automatically when urine is present and close when flow stops. This parameter-based design simplifies operation while the precision requirements are concentrated in the manufacturing of the spring and valve seat, which are critical but limited in scope.
Solution Approach 2:
The valve transitions from a static closed position to a dynamic open position in response to urine pressure, and then back to closed when flow ceases. This dynamic operation allows the valve to adapt automatically to flow conditions without requiring complex control systems. The manufacturing precision is focused on ensuring consistent spring characteristics and valve seat geometry, which are the primary dynamic elements.
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 device effectively prevents urine backflow, reducing the risk of UTIs and maintaining urinary tract sterility, while being durable, easy to sterilize, and suitable for various medical settings.
Implementation Method 1
a spring is disposed within the housing and connected to the valve, the spring being calibrated to provide resistance sufficient to keep the valve closed in the absence of urine flow and to enable the valve to open when urine is expelled
Implementation Method 2
The valve is configured to open in response to urine pressure (i.e., pressure sensitive), enabling the urine to flow out of the catheter tube, and to close when urine flow ceases
Data Source
AI summary
A urine backflow prevention device designed for use with catheters to prevent expelled urine from reentering the body is disclosed. The device comprises a catheter tube with an integrated housing containing a valve and a spring mechanism. The valve is made of medical-grade plastic or rubber and is configured to open in response to urine pressure (i.e., pressure sensitive) and close when urine flow ceases. The spring is made of corrosion-resistant metal and provides the necessary resistance to keep the valve closed in the absence of urine flow. This mechanism effectively prevents backflow, thereby reducing the risk of urinary tract infections. The device is positioned near the proximal end of the catheter tube and is suitable for use in various medical applications where maintaining a sterile environment is critical.