Biosensor Cutout Relieves Contact Pressure for Accurate Glucose Measurement

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional biosensors face measurement reliability issues due to varying skin bulge height under negative pressure, leading to inconsistent blood flow and contact pressure, which affects the accuracy of blood glucose level measurements.

Innovation Solution

The biosensor design incorporates a cutout along the outer periphery of the detector to relieve contact pressure, allowing the skin to be punctured properly and improving measurement reliability by maintaining consistent contact pressure and facilitating blood flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If negative pressure is applied to the biosensor to facilitate blood collection, then blood flow is improved, but contact pressure becomes inconsistent and skin bulging varies among individuals

Engineering Contradiction:

Improveblood flowVSAvoidmeasurement reliability

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The biosensor is divided into a rigid detector portion and a flexible membrane portion. The rigid detector maintains stable contact pressure for consistent measurement, while the flexible membrane portion accommodates skin bulging variations through its elastic deformation, ensuring reliable blood collection across different individuals.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the biosensor have different mechanical properties. The detector area maintains high rigidity for stable contact pressure, while the peripheral membrane area has high flexibility to accommodate skin bulging. This local differentiation resolves the contradiction between maintaining consistent contact pressure and accommodating individual variations.

Inventive Principle:

Principle #3Local quality

2Measurement precision

If the detector is made rigid to maintain stable contact pressure, then measurement consistency is improved, but skin puncture reliability deteriorates due to inability to accommodate skin bulging

Engineering Contradiction:

Improvecontact pressure consistencyVSAvoidskin puncture reliability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The biosensor is segmented into a rigid detector portion and a flexible membrane portion. The rigid detector maintains stable contact pressure for consistent measurement, while the flexible membrane portion accommodates skin bulging variations through its elastic deformation, ensuring reliable blood collection across different individuals.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The biosensor employs asymmetric mechanical properties where the detector area is rigid and the peripheral area is flexible. This asymmetry allows the detector to maintain stable contact pressure while the flexible periphery accommodates skin bulging, resolving the contradiction between measurement precision and puncture reliability.

Inventive Principle:

Principle #4Asymmetry

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

The biosensor effectively punctures the skin and improves measurement reliability by uniformly releasing contact pressure, ensuring sufficient blood flow for accurate glucose level measurements across different individuals.

Implementation Method 1

the portion of the measurement device surrounded by a negative pressure formation component 906 is placed under negative pressure

Methodology Applied

Scientific EffectNegative pressure: Pressure Gradient

Implementation Method 2

The blood reacts with this reagent in the reaction component 918, a current corresponding to the blood glucose level is produced

Methodology Applied

Scientific EffectElectrochemical reaction: Redox Reactions

Data Source

PatentUS10107808B2Biosensor, cartridge storing biosensor, measurement device using biosensor

Publication Date: 2018.10.23 PHC HLDG CORP

AI summary

There are provided a biosensor, and a measurement device in which the biosensor is used, with which accurate puncture is enabled and reliability of measurement results are improved. The biosensor comprises an element substrate, a detector, a connection terminal, a continuity path, and a cutout. The detector is provided over the element substrate, and receives a specimen and detects a specific component contained in the specimen. The connection terminal is provided over the element substrate and acquires current corresponding to the specific component. The continuity path connects the connection terminal and the detector. The cutout is formed along the outer periphery of the detector so as to surround two or more directions of the detector.