Fluid Characteristic Indicator with Helical Diffuser
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Solution Overview
Problem
Current methods for measuring fluid characteristics in clinical settings are often delayed, expensive, and unreliable due to equipment unavailability, calibration requirements, and sample instability, posing safety hazards and requiring extensive training.
Innovation Solution
A portable system with a cylindrical housing containing a pH-sensitive indicating element and a diffuser that efficiently directs a small volume of fluid to the indicator, allowing for immediate and accurate measurement of fluid characteristics, such as pH, without the need for extensive equipment or training.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional laboratory equipment and procedures are used to measure fluid characteristics, then measurement accuracy can be maintained, but measurement time increases and equipment availability decreases
Solution Approach 1:
The patent extracts the essential measurement function from complex laboratory equipment by using a simple pH-sensitive indicating element that directly contacts the fluid sample. This extracted indicator provides immediate colorimetric measurement without requiring laboratory processing, transportation, or complex instrumentation, thereby maintaining measurement accuracy while eliminating time delays.
Solution Approach 2:
The patent employs disposable indicating elements (pH-sensitive paper strips or similar indicators) that are inexpensive and single-use. These indicators are pre-packaged and discarded after one measurement, eliminating the need for expensive, maintainable laboratory equipment while providing immediate results. The disposable nature ensures reliability without requiring calibration or cleaning procedures.
2Reliability
If complex test equipment is used to measure fluid characteristics, then measurement reliability can be improved, but equipment complexity and training requirements increase
Solution Approach 1:
The indicating element performs the measurement function autonomously through direct chemical interaction with the fluid sample. The pH-sensitive indicator automatically changes color based on the fluid's pH level, requiring no external power source, calibration, or complex operation. This self-service mechanism ensures reliable measurements while eliminating equipment complexity and training requirements.
Solution Approach 2:
The patent utilizes colorimetric indicators that change color in response to pH variations in the fluid sample. This visual color change provides an immediate, reliable, and easily interpretable measurement without requiring complex instrumentation. The color change is directly proportional to the pH level, enabling reliable measurement through simple visual comparison.
3Ease of operation
If open sample handling is used during measurement, then measurement accessibility is improved, but sample contamination and exposure hazards increase
Solution Approach 1:
The patent introduces a sealed container as an intermediary between the fluid sample and the external environment. The container has a sealed receptacle that receives the fluid sample and a separate access mechanism that allows the indicating element to contact the sample without exposing it to the outside environment. This intermediary structure enables measurement accessibility while preventing contamination and exposure hazards.
Solution Approach 2:
The patent employs a nested structure where the indicating element is housed within a sealed container that itself is contained within a larger housing. The fluid sample is introduced into the innermost chamber, and the indicating element contacts the sample through a sealed interface. This nested arrangement maintains sample accessibility for measurement while protecting against contamination and exposure at each hierarchical level.
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 rapid, reliable, and safe measurement of fluid characteristics with minimal fluid volume, reducing equipment costs and training requirements while preventing sample contamination and exposure hazards.
Implementation Method 1
the indicating element is a strip or cylinder of pH-sensitive paper which displays a color depending on the pH of a fluid to which the element is exposed
Data Source
AI summary
A fluid characteristic indicator for measuring and indicating a characteristic of body fluid from a medical or veterinary patient has a tubular housing with suction and fluid inlet ports at opposite ends and a fluid characteristic indicating element disposed within. A diffuser supports the indicating element and has at least one fluid channel to direct fluid toward the indicating element. The fluid channel may be formed as a spiral or helix, or as a plurality of longitudinal fluid channels. The housing and the diffuser may have additional structures forming channels that cooperatively direct fluid toward the indicating element. The diffuser may occupy nearly all the interior volume of the housing. Control of the fluid flow may make exposure and saturation of the indicator more accurate, avoid spurious indications due to the color of the fluid itself, and reduce the amount of fluid sample needed to obtain an indication or measurement.