Catheter Insertion Circuit for First-Pass Vein Entry Detection
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Solution Overview
Problem
Current catheter insertion systems face challenges in accurately recognizing vein entry and facilitating successful first-time placement, particularly in fragile or small veins, leading to increased patient pain, procedural costs, and complications such as phlebitis and infiltration.
Innovation Solution
The development of catheter insertion systems that utilize electrical properties to detect the entry of a needle and guidewire into a blood vessel or air-filled space, employing a detection unit with an electrical circuit to differentiate between subcutaneous tissue and fluids or air, and assist in catheter advancement through the integrated guidewire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional catheter insertion methods are used, then the procedure can be performed with simple equipment, but the success rate is low and multiple attempts are required
Solution Approach 1:
The patent replaces mechanical detection methods (visual inspection, manual palpation) with an electrical detection system that measures impedance changes to identify vein entry. The detection unit uses electrical signals to sense the transition from subcutaneous tissue to vascular space, providing objective feedback that improves first-attempt success rates without requiring complex imaging equipment.
Solution Approach 2:
The patent introduces an electrical detection unit as an intermediary between the operator and the catheter insertion process. This detection unit provides real-time feedback about needle position and vein entry, acting as a mediator that guides the insertion process and reduces the skill gap between novice and experienced operators.
2Ease of operation
If multiple catheter insertion attempts are made, then the catheter can eventually be placed, but patient pain and complications increase
Solution Approach 1:
The patent implements a feedback mechanism where the detection unit continuously monitors impedance changes during insertion and provides real-time feedback to the operator. This feedback loop allows the operator to adjust the insertion depth and angle based on objective signals, reducing the number of attempts needed and thereby decreasing patient pain and complications from repeated insertions.
Solution Approach 2:
The detection unit identifies the optimal insertion point and depth before the actual catheter placement is completed. By detecting impedance changes that indicate proximity to the vein, the system allows the operator to make preliminary adjustments to ensure correct positioning on the first attempt, preventing the need for corrective maneuvers that cause additional patient discomfort.
3Productivity
If traditional insertion methods are used, then the procedure time is short per attempt, but the total time increases due to multiple attempts
Solution Approach 1:
The real-time feedback from the detection unit accelerates the learning curve and decision-making process during catheter insertion. Operators can quickly interpret impedance change signals to determine when vein entry has occurred, reducing the time spent on each attempt and eliminating the need for multiple attempts, thereby improving overall productivity and reducing total procedural time.
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
This solution reduces the number of attempts required for successful catheter placement, decreases patient pain and complications, and lowers healthcare costs by improving the accuracy and efficiency of vein access, thereby enhancing patient outcomes and reducing institutional legal and financial risks.
Implementation Method 1
employing a detection unit with an electrical circuit to differentiate between subcutaneous tissue and fluids or air
Data Source
AI summary
Disclosed catheter insertion systems enable the user to identify the location of the needle based on the electrical properties of subcutaneous tissue relative the electrical properties of other fluids such as blood or air. Disclosed systems can include one or more of the following features: 1) the catheter assembly is modular (e.g., the catheter can be connected and disconnected from the detection unit at will); 2) the detection unit employs an electrical circuit that allows for the discernment between subcutaneous tissue and blood; 3) the system assists the end user with catheter advancement. Some embodiments can be used to insert catheters into a spaces where the needle passes first through subcutaneous fat and muscle before entering fluid or air.