Spindle-Based Hemostatic Delivery for Precise Flow and Anti-Clogging
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Solution Overview
Problem
Conventional medical devices for delivering hemostatic agents face issues such as clogging, inconsistent flow rates, and pressure variations, leading to inaccurate dosing and increased procedure time and cost.
Innovation Solution
A medical system with a handle, barrel, and spindle mechanism that allows controlled delivery of pressurized fluids and agents, featuring a spindle with enclosures that rotate and translate to ensure consistent and accurate dispensing, preventing clogging and enabling precise dosing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional catheters are used to deliver hemostatic agents, then the delivery device is simple, but the catheter clogs with fluid or powder
Solution Approach 1:
The delivery device is segmented into multiple functional components: a handle assembly with powder storage compartments, a separate catheter assembly with mesh filter, and a coupling mechanism. This segmentation allows the powder and fluid delivery paths to be separated, preventing clogging while maintaining simplicity.
Solution Approach 2:
A mesh filter is introduced as an intermediary component in the catheter assembly. This filter separates the hemostatic powder from the propellant fluid, allowing fluid to pass through while preventing powder particles from clogging the catheter tip.
2Device complexity
If conventional dispensing methods are used, then the device is simple, but flow rate and pressure vary greatly
Solution Approach 1:
The device incorporates pressure-regulating mechanisms that maintain consistent propellant fluid pressure within a controlled range (e.g., 10-50 PSI). Flow rate control features, such as adjustable flow regulators or mesh filters with controlled pore sizes, ensure consistent hemostatic agent delivery regardless of pressure variations.
3Device complexity
If conventional delivery systems are used, then the device is simple, but dosing accuracy is poor
Solution Approach 1:
The handle assembly is divided into multiple powder storage compartments, each with controlled capacity. The coupling mechanism includes dosing control features such as flow regulators or metering mechanisms that ensure precise delivery of the hemostatic agent to the target site.
Solution Approach 2:
The device incorporates feedback mechanisms such as flow sensors or pressure transducers that monitor the delivery process and adjust the flow rate or pressure in real-time to maintain accurate dosing. The mesh filter also provides feedback by allowing fluid passage while blocking powder, ensuring precise control over the delivered material.
4Device complexity
If conventional devices are used, then the device is simple, but procedure time increases
Solution Approach 1:
The hemostatic agent is pre-loaded into the powder storage compartments of the handle assembly before the procedure. The propellant fluid is pre-positioned in the reservoir. This preliminary preparation eliminates the need for on-site mixing or loading, significantly reducing procedure time while maintaining device simplicity.
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
Ensures consistent and accurate delivery of hemostatic agents, reducing clogging and time/cost by allowing precise control over flow rates and pressures, enhancing procedural efficiency.
Implementation Method 1
supplying a propellant fluid to the handle chamber... supplying the mixture of the medical agent and the propellant gas to the target site via the catheter
Data Source
AI summary
A medical system includes a handle having (1) a handle chamber including an outlet and (2) a barrel extending into the handle chamber and defining a lumen having a longitudinal axis, and a spindle movably disposed within the lumen of the barrel, the spindle including a plurality of spindle enclosures, and wherein the spindle is configured to move between a first configuration, in which at least a portion of each of the plurality of spindle enclosures is positioned within a first portion of the lumen within the handle chamber, and a second configuration, in which at least the portion of each of the plurality of spindle enclosures is positioned in a second portion of the lumen outside the handle chamber.