Flexible Barrier Puncture Locator for Vascular Access
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Solution Overview
Problem
Existing vascular closure systems face challenges in accurately locating punctures in blood vessels during vascular interventions, relying on the 'blood flashback' method which can be imprecise.
Innovation Solution
A puncture locating device featuring an elongated dilator with a flexible barrier that responds to pulsatile blood flow, providing visual and tactile indications of the inlet opening's presence within the blood vessel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the blood flashback method is used to position a vascular device, then the placement can be achieved, but the precision of puncture location is insufficient
Solution Approach 1:
The patent employs a flexible barrier that changes its visual state through pulsations caused by blood flow. When blood enters the internal volume, the flexible barrier pulsates in response to the pulsatile nature of arterial blood flow, providing a visual indication that blood has been detected and the puncture location is confirmed within the vessel lumen.
Solution Approach 2:
The patent utilizes a flexible barrier (thin film) that responds mechanically to blood pressure pulsations. This flexible barrier is positioned to overlie the outlet opening and forms part of the internal volume boundary, allowing it to pulsate visibly when subjected to the pressure waves of arterial blood flow, thereby providing tactile and visual feedback.
2Reliability
If a rigid structure is used for the barrier, then structural stability is maintained, but responsiveness to pulsatile blood flow is reduced
Solution Approach 1:
The patent employs a flexible barrier (thin film) that responds mechanically to blood pressure pulsations. This flexible barrier is positioned to overlie the outlet opening and forms part of the internal volume boundary, allowing it to pulsate visibly when subjected to the pressure waves of arterial blood flow, thereby providing tactile and visual feedback.
Solution Approach 2:
The patent transforms a static barrier into a dynamic indicator. The flexible barrier is designed to move and pulsate in response to the pulsatile blood flow, converting the mechanical energy of blood pressure waves into visible motion. This dynamic response provides real-time feedback about blood flow presence and vessel penetration.
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 indicates the presence of the inlet opening within the blood vessel through pulsations, enhancing the accuracy of puncture location and facilitating precise placement of vascular devices.
Implementation Method 1
The flexible barrier is configured to be movably responsive to pulsatile blood flow, such that, when the elongated dilator is inserted into the puncture of the blood vessel, blood flows into the inlet opening through the channel and out the outlet opening into the internal volume, such that, pulsations in the blood flow cause the flexible barrier to pulse
Data Source
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AI summary
Disclosed are puncture sealing systems and methods of locating a puncture site within a vessel. The systems can include elongated dilators and access sheaths that are configured to locate the puncture site within a vessel so that the position of the puncture site relative to a distal end of the access sheath is known during a puncture sealing procedure.