Arterial Closure Device with Guided Threading Needles
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Solution Overview
Problem
Current methods for sealing arterial access sites after medical procedures are challenging due to the difficulty in accurately positioning stitches within the artery, as they rely on blind puncture techniques and lack assurance of centralization or correct placement within the blood vessel.
Innovation Solution
An arterial closure device featuring an elongated catheter with an externalization needle and threading needles, which create precise openings in the arterial wall and skin, allowing for guided suturing to ensure accurate closure of the access site, utilizing a balloon for stabilization and radiopaque markers for proper placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blind puncture technique is used to access the artery, then the procedure can be performed, but the positioning precision of the stitch within the artery cannot be assured
Solution Approach 1:
The patent applies preliminary action by first puncturing the artery with a needle before inserting the catheter and suture delivery system. This initial puncture creates a controlled access point that guides subsequent positioning of the stitching apparatus, ensuring the stitch will be centrally located within the artery rather than relying on blind puncture throughout the entire procedure.
Solution Approach 2:
The patent uses an intermediary catheter system that is delivered through the initial puncture site. This catheter serves as a mediator that carries the suture delivery mechanism to the precise location within the artery, translating the crude initial puncture into precise stitch placement by providing a guided pathway to the target site.
2Reliability
If stitching is performed blindly from skin, then the procedure can be completed, but the reliability of correct stitch placement cannot be assured
Solution Approach 1:
The patent incorporates feedback mechanisms through radiopaque markers on the catheter and suture delivery system that are visible under fluoroscopic guidance. This allows the operator to visually confirm the position of the catheter tip and suture needle within the artery in real-time, providing feedback that ensures reliable stitch placement while maintaining ease of operation through image guidance.
Solution Approach 2:
The patent replaces the purely mechanical blind stitching technique with a system that uses radiopaque imaging to guide the procedure. By substituting visual feedback from X-ray imaging for tactile or visual estimation during blind puncture, the system achieves reliable stitch placement while keeping the procedure manageable through image-guided navigation.
3Measurement precision
If multiple punctures are made to ensure proper stitch positioning, then positioning accuracy improves, but the procedure time increases
Solution Approach 1:
The patent performs the artery puncture as a preliminary action before catheter insertion and suture deployment. This single initial puncture establishes the access pathway, eliminating the need for multiple punctures to find the correct position. The catheter is then advanced through this pre-established pathway to the precise location, achieving accurate stitch positioning in one coordinated sequence rather than multiple trial punctures.
Solution Approach 2:
The catheter acts as an intermediary that translates the single initial puncture into precise positioning of the suture needle at the desired location within the artery. Rather than requiring multiple punctures to reach the target, the catheter provides a guided tunnel that delivers the stitching apparatus exactly where needed, saving time while maintaining accuracy.
Data Source
AI summary
An arterial closure device includes an elongated catheter having a proximal end, an opposing flexible distal end, and a lumen extending between the proximal end and the distal end. An externalization needle and an internal catheter are disposed within the lumen. The externalization needle is in communication with a first plunger. A first threading needle and a second threading needle are positioned in separate threading channels and in communication with a second plunger. A suture has a first end attached to the second end of the first threading needle and a second end attached to the second end of the second threading needle. A primary aperture extends through a wall of the elongated catheter. A first threading aperture and a second threading aperture extend through the wall of the elongated catheter at opposing sides of the primary aperture.