Proximal Catheter Slit Valves for Infusion and Aspiration Control
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Solution Overview
Problem
Current medical devices lack efficient mechanisms for regulating fluid flow in catheters, particularly in preventing blood clots and embolisms, which can lead to serious health issues like stroke and pulmonary embolism.
Innovation Solution
A pressure-activated medical device featuring a diaphragm with slit valves and a valve control member that can be configured to control fluid flow in both infusion and aspiration directions, allowing for selective management of fluid flow through catheters by utilizing compressive forces and pressure differentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current medical devices are used without pressure-activated valve mechanisms, then device simplicity is maintained, but fluid flow regulation capability is insufficient leading to increased risk of embolisms and blood clots
Solution Approach 1:
The diaphragm with slit valves automatically responds to pressure differentials between proximal and distal ends of the catheter, opening or closing without external control mechanisms. The valve self-regulates fluid flow based on inherent pressure conditions, eliminating need for complex external actuation systems while maintaining reliable embolism prevention
Solution Approach 2:
A thin diaphragm with integrated slit valves is used to create a simple yet effective flow regulation mechanism. The flexible diaphragm responds to pressure changes by deflecting and controlling valve opening, providing reliable fluid flow management without complex mechanical structures
2Measurement precision
If a pressure-activated valve mechanism is implemented, then fluid flow regulation precision is improved, but device complexity increases
Solution Approach 1:
The valve system automatically senses and responds to pressure differentials without external control inputs. The diaphragm deflects in response to pressure changes, precisely controlling valve opening based on inherent pressure conditions, achieving precise flow regulation without complex control systems
Solution Approach 2:
The valve responds to changes in pressure differential parameters between proximal and distal ends. By utilizing pressure as the control parameter, the system achieves precise fluid flow regulation through natural physical responses rather than complex mechanical or electronic control mechanisms
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 regulates fluid flow, minimizing the risk of embolisms by allowing for precise control of fluid infusion and aspiration, thereby reducing the risk of blood clots and associated health complications.
Implementation Method 1
The valve control member can be configured to control deflection of the diaphragm... compressive forces acting on the peripheral portion of the diaphragm create moment forces
Implementation Method 2
A pressure-activated medical device featuring a diaphragm with slit valves and a valve control member that can be configured to control fluid flow... control deflection of the diaphragm
Data Source
AI summary
A catheter assembly for regulation or transfer of fluids to and from a patient. The catheter assembly may include a catheter and a valve assembly. The valve assembly may include a diaphragm having two unidirectional slit valves that open in different directions, a first unidirectional slit valve opening distally in response to an infusion-induced pressure and a second unidirectional slit valve opening proximally in response to an aspiration-induced pressure.