Catheter Y-Fitting Side Feed for Rapid Material Delivery
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Solution Overview
Problem
Existing medical devices for delivering filler materials into a patient, such as for treating aneurysms, are inefficient, requiring longer times and more driving fluid to deliver therapeutic quantities.
Innovation Solution
A system with a catheter and Y-fitting assembly that uses a side feed for driving fluid to pull material through the lumen, including a cannula with apertures for generating fluid jets, allowing rapid delivery of biocompatible materials like SIS or polysaccharides into a patient's vessel or aneurysm sac.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If prior art devices are used to deliver filler material into a patient, then the material can be delivered, but the delivery process takes a long time and requires large amounts of driving fluid
Solution Approach 1:
The patent applies hydraulic principles by using a side feed to introduce driving fluid into the lumen, creating fluid jets that rapidly propel material through the catheter. This hydraulic approach replaces slower prior art delivery methods, enabling therapeutically sufficient material delivery within seconds by leveraging fluid pressure and flow dynamics to accelerate material transport through the introducer unit.
Solution Approach 2:
The invention changes the flow parameters of the driving fluid by introducing it through a side feed at specific angles and pressures to generate jets. This parameter modification optimizes the fluid's ability to pull material through the lumen rapidly, transforming the delivery process from a slow, continuous flow to a high-velocity jet-driven system that delivers material in seconds rather than minutes.
2Productivity
If prior art devices are used to deliver filler material into a patient, then the material can be delivered, but large amounts of driving fluid are required
Solution Approach 1:
By utilizing hydraulic jet formation through the side feed, the system concentrates driving fluid into focused streams that efficiently propel material. This hydraulic jet mechanism reduces overall fluid consumption compared to prior art methods that required larger volumes to achieve the same material delivery, as the jets create higher velocity and more effective material propulsion with less total fluid.
Solution Approach 2:
The invention modifies the driving fluid parameters by controlling its introduction through the side feed to create high-velocity jets. This parameter optimization allows the system to achieve rapid material delivery with reduced fluid volume, as the jet configuration maximizes the mechanical work done by the fluid on the material, reducing waste and improving delivery efficiency.
3Reliability
If filler material is delivered to fill an aneurysm sac, then pressure on the weakened vessel wall is reduced, but the delivery process is time-consuming
Solution Approach 1:
The hydraulic jet system enables rapid delivery of filler material to the aneurysm sac, maintaining treatment effectiveness while reducing delivery time. The high-velocity fluid jets quickly propel sufficient material through the catheter and into the aneurysm, ensuring the sac is filled and pressure on the weakened vessel wall is reduced within seconds rather than minutes, thus preserving reliability while improving productivity.
Solution Approach 2:
By changing the flow parameters to generate jets, the system achieves rapid material delivery that maintains the therapeutic effectiveness of aneurysm filling. The jet configuration ensures that therapeutically sufficient quantities of material are delivered quickly, preserving the reliability of pressure reduction on the aneurysm wall while dramatically improving the speed of treatment delivery.
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
Enables the rapid delivery of therapeutically sufficient amounts of material within seconds, often in one second, with reduced driving fluid usage, effectively closing or occluding vessels or aneurysms while allowing tissue remodelling.
Implementation Method 1
the side feed acts to generate a stream of driving fluid within the lumen which pulls the material through the lumen by means of the pressure and flow of fluid from the side feed
Implementation Method 2
The cannula includes at least one aperture therein, driving fluid being able to pass into the cannula or inner catheter through said at least one aperture... the cannula... can generate through the apertures jets of driving fluid for driving the material through the lumen
Data Source
Figure 1
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AI summary
Apparatus for delivering material into a patient includes a catheter (20) having a proximal end (22) and a distal end (24). Material, preferably of filamentary or thread form, is fed from a material supply (30) into a Y-fitting (60) having a main branch (66) and a side branch (72). The side branch (72) is connected to a source of driving fluid (42) able to feed drive fluid under pressure into the material carrier so as to pull material forwardly and out of the distal end (24) of the catheter (20). The assembly includes an inner cannula (50) within which material is passed from the material source (30). This increases the speed of delivery of material though the device (10) and reduces the amount of drive fluid which is required.