Dual-Color Illumination for Air Bubble Detection in Injection Heads
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Solution Overview
Problem
In angiography, it is challenging for operators to effectively verify the presence of air bubbles in a syringe before injection, which can lead to air bubbles being administered to patients.
Innovation Solution
An injection head equipped with a syringe holding unit, a piston driving mechanism, and dual light emitting portions that illuminate the syringe, allowing operators to visually inspect for air bubbles by emitting different colors of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single light source is used to illuminate the syringe, then the structure is simple, but the ability to detect air bubbles is insufficient
Solution Approach 1:
The patent applies local quality by using two light emitting portions with different colors (first and second colors) positioned at different locations on the injection head. Each light emitting portion illuminates the syringe from a different angle and wavelength, enhancing the ability to detect air bubbles through color contrast while maintaining a distributed rather than centralized structure.
Solution Approach 2:
The patent transitions from a single-point light source to a multi-dimensional illumination system by positioning light emitting portions at different spatial locations (upper side of the center point of the ram member) and using different colors. This multi-dimensional approach enables operators to verify air bubbles more effectively through color differentiation and multiple viewing angles.
2Illumination intensity
If the light emitting portions are positioned at the center of the ram member, then the structure is compact, but the illumination effectiveness for air bubble verification is reduced
Solution Approach 1:
The patent positions the light emitting portions at the upper side of the center point of the ram member in advance, creating optimal illumination conditions before injection begins. This preliminary positioning ensures that the syringe is properly illuminated for air bubble verification during the suction phase, when the syringe is held in a specific posture with the front-end side at a height same as or lower than the rear-end side.
Solution Approach 2:
The patent uses light emitting portions that emit different colors (first color and second color) to illuminate the syringe. This color differentiation enhances the visibility of air bubbles against the contrast medium, allowing operators to easily distinguish between air and liquid phases through color contrast during verification.
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
Enables operators to reliably check for air bubbles in the syringe before injection, preventing air bubbles from being injected into patients and ensuring safer medical procedures.
Implementation Method 1
a first light emitting portion which emits light with a first color and illuminates the syringe
Implementation Method 2
a second light emitting portion which emits light with a second color and illuminates the syringe
Data Source
AI summary
A chemical-liquid injection head including a syringe holding unit which holds a syringe in which a piston member is slidably inserted into a cylinder member having a circular cylindrical shape, a piston driving mechanism having a ram member for moving the piston member of the syringe, and a first light emitting portion which emits light with a first color and illuminates the syringe and a second light emitting portion which emits light with a second color and illuminates the syringe. The first light emitting portion and the second light emitting portion, viewed in a posture at the time of use of the injection head, are provided at an upper side of the ram member.