Bead Mill Erythrocyte Fragility Testing with Optical Hemolysis Detection

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Solution Overview

Problem

Current methods for measuring red blood cell mechanical fragility are limited in their ability to accurately and efficiently assess the susceptibility of erythrocytes to mechanical stress, particularly in clinical and research settings, where precise characterization of hemolysis under varying conditions is necessary.

Innovation Solution

A mechanical fragility tester utilizing a bead mill principle, which includes a sample miller, a chamber pincher for reversible compression, and an optical detector for quantifying hemolysis, allowing for controlled mechanical stress application and optical measurement without the need for fluidic transfer, using a disposable cartridge and electromagnetic bead mill for sample disruption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional mechanical fragility testing methods are used, then erythrocyte membrane fragility can be measured, but the measurement precision and efficiency are limited

Engineering Contradiction:

Improvehemolysis quantification accuracyVSAvoidtesting efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent combines the bead milling mechanism with optical detection capabilities in a single integrated system. The bead mill apparatus incorporates optical windows and light sources that allow direct optical measurement of hemolysis within the same chamber where mechanical stress is applied, eliminating the need for separate measurement steps and fluidic transfers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent replaces traditional mechanical measurement methods with optical detection systems. Instead of relying on complex mechanical separation and counting methods, the system uses optical detectors to quantify hemolysis through light transmission or scattering properties, significantly improving both precision and efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If fluidic transfer is used between stressing and detection chambers, then measurement can be performed, but contamination risk increases and system complexity increases

Engineering Contradiction:

Improvecontamination riskVSAvoidsystem structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the stressing chamber and detection chamber into a single integrated chamber. The bead mill apparatus contains both the mechanical stress application mechanism and optical detection systems within one sealed environment, eliminating the need for fluidic transfer between separate chambers and thus removing the contamination risk associated with such transfers.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single chamber serves multiple functions: it acts as the reaction chamber for bead milling, the optical detection chamber, and the sample containment vessel. This multi-functional design eliminates the need for separate chambers and fluidic connections, simplifying the overall system structure while improving reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If reusable chambers are used, then device complexity is reduced, but contamination risk and cleaning requirements increase

Engineering Contradiction:

Improvechamber structureVSAvoidcontamination

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent employs disposable cartridges that contain the bead mill chamber and optical components. These single-use cartridges are designed to be discarded after a single testing cycle, eliminating the need for cleaning and sterilization of reusable chambers. This approach reduces contamination risk while maintaining simple chamber structure, as the disposable nature of the cartridges simplifies the overall system design.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 precise and efficient measurement of erythrocyte mechanical fragility, providing comprehensive profiles of hemolysis under different stress conditions, reducing contamination risks and enhancing sensitivity through disposable cartridges and optimized bead movement mechanisms.

Implementation Method 1

cell membranes are exposed to some kind of mechanical disturbance such as a shear stress

Methodology Applied

Scientific EffectMechanical stress: Mechanical Force

Implementation Method 2

an optical detector for said optical measurement to quantify said hemolysis

Methodology Applied

Scientific EffectOptical absorption: Absorption (EM radiation)

Data Source

PatentUS11009500B2Method of using bead milling in erythrocyte fragility testing

Publication Date: 2021.05.18 BLAZE MEDICAL DEVICES

AI summary

A bead mill and an associated bead-mill-based machine for testing mechanical fragility of red blood cells, employing a cartridge configured to contain a sample while cells get stressed via bead oscillation and, in the case of the fragility testing machine, also while lysis levels get detected, for presentation of fragility information.