Retrograde Vascular Access Catheters for Guided Internal Puncture
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Solution Overview
Problem
Traditional central venous catheterization techniques involve blind percutaneous puncture, posing risks such as injury to adjacent structures and pneumothorax, especially in challenging anatomies like morbid obesity or children.
Innovation Solution
The method of transvascular retrograde access placement uses advanced diagnostic imaging and modified guidewires and catheters with angled tips and channels to visualize and puncture central blood vessels internally, eliminating blind puncture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional blind percutaneous puncture is used for central venous catheterization, then the procedure is simple and quick, but it poses risks such as injury to adjacent structures and pneumothorax
Solution Approach 1:
The patent applies preliminary action by performing internal visualization and positioning of the catheter tip within the vessel lumen before attempting puncture. The catheter is advanced retrograde to a position where its tip can be visualized under fluoroscopy, ensuring proper positioning before the puncture attempt, thereby preventing injury to adjacent structures
Solution Approach 2:
The patent uses fluoroscopic imaging as an intermediary to guide the puncture procedure. The imaging system serves as a mediator between the operator and the target vessel, allowing real-time visualization of the catheter tip and surrounding structures to ensure safe and accurate puncture placement
2Measurement precision
If blind percutaneous puncture is used, then the procedure is straightforward, but precision and accuracy in vessel puncture are reduced
Solution Approach 1:
The patent implements feedback by using fluoroscopic imaging to continuously monitor the position of the catheter tip during advancement and puncture. This real-time feedback allows the operator to adjust the procedure dynamically, ensuring precise puncture placement while maintaining awareness of surrounding anatomical structures
Solution Approach 2:
The patent adds the dimension of internal visualization by advancing the catheter retrograde through the venous system and visualizing its tip position from within the vessel lumen. This internal perspective provides precise spatial information that guides accurate puncture placement while maintaining operational control
Data Source
AI summary
The present invention relates to methods of transvascular retrograde access placement and to devices that facilitate these methods. For purposes of the present invention, transvascular retrograde access placement generally comprises the insertion of a vascular catheter into a central blood vessel through the puncturing of the central blood vessel from the inside of the central blood vessel with a needle or other similarly configured device, or a needle-tipped guidewire of the present invention, and exiting that needle from the patient through the skin rather than the traditional approach of inserting a needle from the outside of the skin surface to the inside of a blood vessel.