Angled-Tip Intravascular Catheter for First-Pass Vessel Entry
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Solution Overview
Problem
Conventional intravascular catheters face challenges in achieving successful initial placement within a blood vessel due to their round cross-section and perpendicular end cut, leading to failed attempts and potential puncture of the vessel wall during advancement.
Innovation Solution
The catheter is designed with an angled end, typically between 45 to 60 degrees, allowing it to be inserted within the vessel upon needle penetration, eliminating multiple attempts and facilitating smooth transition into the blood vessel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the catheter has a round cross-section with a 90-degree end cut, then the catheter structure is simple and easy to manufacture, but the catheter cannot be successfully placed within the vessel on the first attempt and may puncture the opposite vessel wall
Solution Approach 1:
The catheter end is designed with an angled cut (45-60 degrees) instead of a symmetric 90-degree cut, creating an asymmetric geometry that facilitates proper orientation and insertion into the vessel. This asymmetric design allows the catheter to be properly positioned within the vessel lumen upon needle penetration, eliminating the need for multiple attempts and preventing puncture of the opposite vessel wall.
2Ease of operation
If the catheter is advanced with the needle-catheter combination until the catheter is within the vessel, then successful cannulation is achieved, but multiple attempts may be needed and the opposite vessel wall may be punctured
Solution Approach 1:
The catheter end is pre-configured with an angled cut that enables it to be properly positioned within the vessel lumen at the moment of needle penetration. This preliminary configuration ensures that when the needle-catheter combination is inserted, the catheter tip is already oriented correctly to enter the vessel smoothly, eliminating the need for further advancement that could cause vessel wall puncture.
Data Source
AI summary
Disclosed are various embodiments for an intravascular catheter and methods of use. In one embodiment, an intravascular catheter and needle assembly comprises a catheter needle and a catheter sheath surrounding a portion of the catheter needle. The catheter sheath has an end for insertion that is angled between 5 and 85 degrees.