Single-Handed Guidewire Insertion Device
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Solution Overview
Problem
The Seldinger Technique and its ultrasound-guided modifications require two hands for guidewire insertion, leading to loss of needle control and increased risk of tissue trauma due to the inability to visualize the needle tip during guidewire placement, resulting in complications such as arterial puncture, hematoma, and venous thrombosis.
Innovation Solution
A single-handed insertion device that combines needle insertion, suction application, and guidewire insertion, allowing for ultrasound visualization and stability, with an optional protective sheath to secure access and prevent tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two hands are used for guidewire insertion in the Seldinger Technique, then guidewire placement can be performed, but needle control is lost and ultrasound visualization is interrupted, increasing the risk of tissue trauma
Solution Approach 1:
The device merges the needle holder and guidewire inserter into a single integrated instrument. The needle holder contains a guidewire insertion channel that allows the guidewire to be passed through the needle lumen without releasing the needle, maintaining continuous ultrasound visualization and needle control throughout the procedure
Solution Approach 2:
The guidewire is nested within the needle lumen, and the needle holder structure contains the guidewire insertion channel within its body. This nested arrangement allows the guidewire to be advanced through the needle while the needle remains securely held, enabling one-handed operation without losing visualization
2Measurement precision
If the needle is held with one hand and the syringe is uncoupled with the other hand, then suction can be applied and confirmed, but the procedure time increases and the risk of complications increases
Solution Approach 1:
The device combines the needle holder and syringe coupling into a single integrated unit. The syringe couples directly to the needle holder rather than requiring separate hand manipulation of the needle hub, allowing aspiration confirmation to be performed while maintaining a ready position for immediate guidewire insertion without procedural delays
3Reliability
If multiple needle passes are performed to achieve access, then the probability of successful cannulation increases, but the risk of arterial puncture and hematoma increases
Solution Approach 1:
The device pre-positions the guidewire within the needle lumen before needle insertion. This preliminary arrangement allows for rapid guidewire advancement immediately upon needle entry, reducing the need for multiple needle passes and minimizing tissue trauma associated with repeated punctures
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 enables safer and more precise guidewire placement with reduced complications, as it maintains ultrasound visibility and control during guidewire insertion, decreasing the risk of arterial punctures and venous cannulation attempts, and improving procedural efficiency.
Implementation Method 1
a suction apparatus, wherein the suction apparatus is in communication with the lumen of the needle
Data Source
AI summary
An insertion apparatus for inserting an object into a body comprising a housing, a piercing structure with a lumen, wherein the piercing structure extends distally from the housing, a vacuum chamber that communicates with the lumen of the piercing structure, a plunger configured to fit within the vacuum chamber, and a guidewire, wherein the insertion apparatus is configured to be operated with a single hand.