Occludable Introducer Needle Compressible Section
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Solution Overview
Problem
During vascular procedures, bleeding and air aspiration can occur when removing the introducer needle, posing risks of contamination and vascular occlusion, as existing methods lack effective control over blood and air passage.
Innovation Solution
A compressible section is integrated between the rigid needle and the hub, allowing for simultaneous occlusion of blood and air passage by compressing the section with the thumb and finger, facilitating easier guidewire insertion and reducing contamination risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the syringe is removed from the introducer needle to facilitate guidewire insertion, then the guidewire can be introduced into the vessel, but blood can escape from the needle and air can be aspirated into the vessel
Solution Approach 1:
A compressible member is introduced as an intermediary component between the needle and hub. This member can be compressed to occlude the passage, serving as a mediator that allows the syringe to be removed for guidewire insertion while preventing blood escape and air aspiration. The compressible member acts as a temporary seal that can be actively controlled during the procedure.
Solution Approach 2:
The compressible member is pre-positioned within the introducer needle assembly between the needle and hub before the procedure begins. This preliminary placement allows the operator to quickly occlude the passage by compressing the member when the syringe needs to be removed, without needing to assemble additional components during the critical moment of guidewire insertion.
2Reliability
If the operator uses their finger to occlude the needle hub to prevent blood and air issues, then contamination and vascular occlusion risks are reduced, but the procedure complexity increases and sterility may be compromised
Solution Approach 1:
The compressible member is designed to be self-contained within the introducer needle assembly, eliminating the need for the operator to use their finger to occlude the hub. The device serves itself by providing an integrated occlusion mechanism that maintains sterility and reliability without requiring additional manual intervention that could compromise the procedure.
3Reliability
If a compressible member is added to the introducer needle assembly to control blood and air passage, then safety is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The compressible member is constructed as a flexible, thin-walled component that can be easily molded and integrated into the introducer needle assembly. This flexible shell design allows for simple manufacturing processes while providing effective occlusion capability, balancing safety improvements with manufacturing ease.
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 solution effectively prevents blood and air from escaping during needle removal, enhancing procedural safety by maintaining a clear operative field and reducing the risk of vascular occlusion and contamination.
Implementation Method 1
the compressible section of the introducer needle is occluded by compressing the section with the thumb and a finger. Neither blood nor air can pass.
Data Source
AI summary
An introducer needle assembly including a compressible section between a rigid needle and a hub. Once a vessel is entered as determined by blood entering a syringe, the compressible section of the introducer needle is occluded by compressing the compressible section with a thumb and a finger. Neither blood nor air can pass. Since the compressible section is in a flattened area it is easier to hold the needle while the syringe is unscrewed. An operator then can begin threading a guidewire down a divide which is now easier to enter because blood is not coming out of the hub thus obscuring a lumen.