Pressure Jacket Retention Assembly for Stable Angiography Injection
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Solution Overview
Problem
Existing fluid injectors face challenges in retaining syringes within pressure jackets during high-pressure medical procedures, leading to undesired movement and potential structural failure due to radial expansion, especially in cardiovascular angiography applications.
Innovation Solution
A syringe and pressure jacket retention assembly featuring pivotable retaining arms with biasing members and linkage mechanisms that allow easy insertion and removal while securely holding the syringe and pressure jacket in place during fluid injection, utilizing angled protrusions and electromechanical motors for enhanced retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid cylindrical pressure jacket with a rigid cap is used to enclose the syringe, then radial expansion of the syringe is prevented, but the syringe cannot be easily inserted or removed from the pressure jacket
Solution Approach 1:
The pressure jacket cap is designed to be movable rather than fixed, allowing it to transition between open and closed positions. This dynamic design enables easy syringe insertion and removal while maintaining radial expansion control when closed, resolving the contradiction between stability and ease of operation.
Solution Approach 2:
A movable cap acts as an intermediary element between the syringe and the external environment. It provides a controlled interface that allows syringe access when open while maintaining pressure containment when closed, solving the contradiction between accessibility and structural stability.
2Ease of operation
If the support arm is completely moved out of the way to insert and engage the syringe, then easy insertion is achieved, but the syringe movement cannot be limited during injection
Solution Approach 1:
The support arm is designed to be movable, transitioning between a retracted position during insertion and an engaged position during injection. This dynamic behavior allows the arm to facilitate easy insertion when retracted while providing reliable syringe positioning when engaged, resolving the contradiction between ease of operation and reliability.
3Reliability
If conventional retention mechanisms are used, then syringe retention during injection is achieved, but the device complexity increases
Solution Approach 1:
The support arm combines multiple functions into a single component: it provides structural support for the pressure jacket, acts as a retention mechanism for the syringe, and enables easy insertion through its movable design. This merging of functions achieves reliable retention while minimizing device complexity.
Solution Approach 2:
The movable support arm serves multiple purposes: structural support, syringe retention, and insertion facilitation. This multi-functional design reduces the need for separate dedicated components for each function, thereby reducing overall device complexity while maintaining reliability.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
An assembly for retaining a pressure jacket (134) and a syringe (132) on a fluid injector, the assembly including a base plate (1902) comprising a body (1904); at least a first retaining arm (1910a) and a second retaining arm (1910b) operatively mounted on the body of the base plate, the first retaining arm having a first retaining surface at a distal end thereof and the second retaining arm having a second retaining surface at a distal end thereof, wherein the first retaining surface and the second retaining surface are configured for abutting a distal surface of at least one of the pressure jacket and the syringe; a linkage assembly operatively connected to at least one of the first retaining arm and the second retaining arm, wherein the linkage assembly is configured to move at least one of the first retaining arm and the second retaining arm between at least a first open position and a closed position.