Guide Wire Catheter Insertion With Bleed-Back Triggered Advancement
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Solution Overview
Problem
Catheter and blood collection processes are complicated by small or collapsed vessels, necessitating improved devices and methods for catheter placement and blood collection.
Innovation Solution
The method involves inserting a needle into a vessel, advancing a guide wire, and propelling a catheter using a catheter advancement device, with optional manual or automated activation, and incorporating bleed back sensors for visual or audible indications to facilitate insertion and retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual catheter insertion is performed, then the procedure can be completed with simple equipment, but the process is time-consuming and difficult for small or collapsed vessels
Solution Approach 1:
The catheter advancement device automatically propels the catheter into the vessel using a spring mechanism after blood detection confirms proper needle placement. The system performs the advancement action itself without requiring manual manipulation by the operator, thereby reducing insertion time while maintaining ease of operation through simple activation.
Solution Approach 2:
The device pre-loads a spring mechanism that is automatically activated upon blood detection. This preliminary preparation of the propulsion system allows for rapid catheter advancement immediately after vessel access is confirmed, eliminating the time delay associated with manual catheter insertion while keeping the activation process simple.
2Productivity
If automated catheter advancement is implemented, then insertion speed and precision are improved, but device complexity increases
Solution Approach 1:
The patent replaces complex electronic or motorized propulsion systems with a simple spring-based mechanical mechanism. The spring is pre-loaded and automatically released upon blood detection, providing automated catheter advancement without requiring motors, sensors, or electronic controls, thus maintaining high insertion efficiency while minimizing device complexity.
Solution Approach 2:
The spring mechanism acts as an intermediary that converts the detection signal into mechanical propulsion force. This intermediate mechanical element simplifies the overall system by providing a direct, reliable connection between blood detection and catheter advancement without requiring complex control systems or power sources.
3Measurement precision
If blood detection sensors are added, then insertion accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The blood detection sensor provides immediate feedback when the needle tip enters the vessel, triggering the spring mechanism to advance the catheter. This feedback loop ensures accurate vessel access detection and automatic activation of the advancement mechanism, improving insertion precision while maintaining relatively simple device architecture through the use of a single sensor-triggered response.
Data Source
AI summary
A catheter insertion device includes a handle, a needle, a guide wire, and a catheter. The handle may have a proximal region and a distal region. The distal region may include a slot between a top extension and a bottom extension, which extends through a distal end. The needle may have a proximal end positioned in the proximal region and a distal end extending from the distal region. The guide wire may have a proximal end positioned in the proximal region of the handle and a distal end positioned in a lumen of the needle. The catheter may be positioned coaxially over the needle with a proximal end connected to a catheter hub. The catheter hub may be slidably disposed in the slot to enable movement from a first position in the distal region to a second position distal of the distal region.