Needle Holder with Vent for Angioplasty Control
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Solution Overview
Problem
Current needle puncturing techniques for small blood vessels, such as those below the knee, face challenges including inaccurate positioning due to flexible long needles and exposure to X-ray radiation, with standard short needles being insufficient for effective angioplasty, especially in cases of chronic total occlusions.
Innovation Solution
A specialized needle holder that extends standard needles, providing a stiff and elongated structure with a vent for blood flow confirmation and an optional guidewire holding mechanism, reducing radiation exposure and improving procedural control and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If long needles are used to extend the user hand from the puncturing site, then the needle can reach deeper vessels, but the needle becomes too flexible to accurately position the tip and blood cannot reach the proximal end
Solution Approach 1:
The device segments the needle system into two parts: a short, stiff needle for accurate positioning and a long, flexible holder for extended reach. The holder acts as an extension that does not compromise the needle's structural integrity or positioning accuracy.
Solution Approach 2:
The holder serves as an intermediary component between the user's hand and the needle. It provides the necessary length extension while allowing the needle to maintain its stiff, controllable properties for accurate tip positioning.
2Length of moving object
If long needles are used, then the reach is extended, but blood flow resistance increases and blood cannot reach the proximal end
Solution Approach 1:
The system separates the functions of reaching (holder) and blood transport (needle). The holder provides length without contributing to blood flow resistance, while the short needle maintains low resistance for effective blood flow to confirm proper positioning.
3Loss of energy
If standard short needles are used, then blood can reach the proximal end easily, but the user hand is exposed to direct X-ray radiation and the needle is insufficient for deep vessels
Solution Approach 1:
The holder acts as a radiation shield intermediary, positioned between the user's hand and the X-ray source. It absorbs or blocks a portion of the radiation, reducing exposure to the user while allowing the short needle to maintain its blood flow characteristics.
Solution Approach 2:
The device segments the radiation protection function from the needle itself, placing it in the holder. This allows the needle to remain short and efficient for blood flow while the holder provides the necessary radiation shielding and length extension.
4Length of moving object
If long thin needles are used, then the reach is extended, but the needle flexibility prevents accurate positioning control
Solution Approach 1:
The system divides the control function (needle) from the reach function (holder). The short needle remains stiff and easy to control for precise positioning, while the holder provides the necessary length extension without requiring direct manipulation.
Solution Approach 2:
The holder serves as a mediator that translates the user's control inputs into needle positioning. It provides mechanical advantage and stability, making it easier to control the needle tip position while extending the reach.
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
Enhances the accuracy and safety of needle insertion by reducing radiation exposure and improving control over needle trajectory, while minimizing blood spillage and procedure time through the use of a stiff elongated holder and integrated guidewire management.
Implementation Method 1
The needle holder includes a vent for blood flow to verify that the needle tip is properly located inside the blood vessel
Data Source
AI summary
Device and method for puncturing blood vessels while using fluoroscopy. The disclosed device enables improved needle orientation control and avoids direct exposure of the clinician's hand to X-ray during the puncturing procedure.