Catheter Support Member for Stable Insertion and Easy Detachment
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Solution Overview
Problem
Existing catheter assemblies are prone to warping during insertion due to lack of support, leading to potential needle tip retraction and repeated puncturing.
Innovation Solution
A catheter assembly with a support member that moves between positions to stabilize the catheter, preventing warping and enabling easy detachment of the catheter hub and operation member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the catheter is inserted deep into the patient's body and housed in the needle hub in a stacking manner, then the catheter can be inserted into the body, but the catheter is not supported and easily warps when reaction force is received from the patient
Solution Approach 1:
The support member is pre-configured within the needle hub to provide support to the catheter during insertion. Before the catheter is advanced into the patient's body, the support member is positioned to contact and stabilize the catheter, preventing warping when reaction forces are received from the patient during the insertion process.
2Stability of the object's composition
If the support member contacts and supports the catheter during insertion, then the catheter is prevented from warping, but the catheter hub and operation member cannot be easily detached from the needle hub
Solution Approach 1:
The support member is designed with movable characteristics, allowing it to transition between a first position where it contacts and supports the catheter during insertion, and a second position where it does not contact the catheter, enabling easy detachment of the catheter hub and operation member from the needle hub after insertion is complete.
3Device complexity
If the catheter extends in a non-supported state during insertion, then the structure is simple, but the needle tip may retract from the inserted portion and the patient may be punctured again
Solution Approach 1:
The support member acts as an intermediary element between the needle hub and the catheter. It provides necessary support and stabilization to the catheter during insertion without requiring complex structural modifications to the overall device, thereby preventing needle tip retraction while maintaining relative structural simplicity.
Data Source
AI summary
A catheter assembly includes: a hollow catheter; a catheter hub to which the catheter is fixed; an inner needle including a needle tip, the inner needle being detachably disposed inside of the catheter; a needle hub to which the inner needle is fixed; a catheter operation member configured to move the catheter relative to the inner needle; and a support member attached to a distal side of the needle hub and configured to rotate about a rotation axis orthogonal to a longitudinal direction of the assembly.