Pressurized Valve Assembly for Consistent Hemostatic Agent Delivery
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Solution Overview
Problem
Existing medical procedures face challenges in delivering hemostatic agents to remote sites within the body, such as the gastrointestinal tract, due to inconsistent dosing, agent clogging, and the need for multiple actuations, which can hinder effective hemostasis.
Innovation Solution
A device is configured to deliver agents via pressurized fluid, incorporating a catheter with a lumen, an enclosure, and a valve that transitions between configurations to control the flow of the agent, allowing for precise delivery without the need for multiple actuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical agent delivery systems are used, then agent delivery can be achieved, but multiple actuations are required and dosing consistency deteriorates
Solution Approach 1:
The patent extracts the agent from a storage container and directly delivers it through a nozzle, eliminating intermediate storage and transfer mechanisms. This direct delivery approach reduces the number of actuations required and improves dosing consistency by eliminating potential clogging points and intermediate handling steps.
Solution Approach 2:
The patent replaces complex mechanical actuation systems with a simplified mechanism that uses fluid pressure to drive agent delivery. This substitution reduces the number of mechanical components and actuations needed, thereby improving operational ease and dosing reliability.
2Ease of operation
If mechanical agent delivery systems are used, then agent delivery can be achieved, but agent clogging occurs in delivery device portions
Solution Approach 1:
The patent extracts the agent directly from storage through a nozzle without intermediate containment structures. This eliminates portions of the delivery device where agent could accumulate and clog, resolving the clogging issue while maintaining operational simplicity.
Solution Approach 2:
The system preliminarily pressurizes the agent in the storage container before delivery, ensuring the agent is in a flow-ready state. This preliminary pressurization prevents clogging by maintaining continuous flow through the delivery system without requiring complex mechanical pumping mechanisms.
3Ease of operation
If mechanical agent delivery systems are used, then agent delivery can be achieved, but desired delivery rate and dosage cannot be achieved
Solution Approach 1:
The patent replaces mechanical metering and control mechanisms with fluid pressure-based delivery control. By using pressurized gas to drive the agent through a controlled orifice, the system achieves precise delivery rates without complex mechanical adjustment mechanisms, improving both operational ease and delivery precision.
Solution Approach 2:
The system controls delivery rate by adjusting gas pressure parameters rather than mechanical flow restrictions. This parameter-based control allows for precise adjustment of delivery rate and dosage while maintaining a simple mechanical structure, resolving the contradiction between operational simplicity and delivery precision.
4Ease of operation
If mechanical agent delivery systems are used, then agent delivery can be achieved, but agent cannot reach treatment site deep within GI tract
Solution Approach 1:
The patent uses pressurized gas to propel the agent through the delivery catheter to remote treatment sites. This pneumatic propulsion system provides sufficient force to deliver agent deep within the GI tract while maintaining a simple device structure without complex mechanical pumping or propulsion 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 enables consistent and efficient delivery of hemostatic agents to target tissues, reducing procedure time and simplifying the process by eliminating the need for additional valves and actuations.
Implementation Method 1
deliver agents via pressurized fluid
Implementation Method 2
a valve downstream of the enclosure to receive the combination of the pressurized fluid and the agent from the enclosure. The valve may have a first configuration preventing flow of the combination through the lumen and a second configuration permitting flow of the combination through the lumen
Data Source
Figure 1~2
Figure 4A~3B
Figure 6A~7B
AI summary
The invention relates to a valve assembly for a medical agent delivery system or a medical agent delivery device, the valve assembly comprising a valve chamber, an input channel including an input lumen, an output channel including an output lumen, and a rod including a plunger at a distal end of the rod, wherein the valve chamber is cylindrical and includes a cover portion at a proximal end of the valve chamber and a distal opening fluidically connecting the valve chamber with the output channel, wherein the plunger is configured to form a fluid-tight seal with the valve chamber at the distal opening.